Tesla microfilm letters

[Michelinho]

Westinghouse Co. – 0141-0142-0143-0144-0145

Westinghouse Co. – 0141


Westinghouse Electric & Manufacturing Company,

120 Broadway,
New York, N. Y. 3/22/1902

WLH

Mr. Nikola Tesla,
Wardenclyffe, L. I., N. Y.

Dear Sir:

We are advised by our Factory at Pittsburgh, that about April 4th, 1901 we delivered to you, through our Mr. Hamilton, a high tension testing set which was to be used by you in testing a generator.

We understand that this generator has now been shipped, and presume you are through with this testing set.We would therefore request you to have it returned to our factory at Pittsburgh, marking the same clearly as coming from you, and notifying us when shipment is made, sending us bill of lading.

Yours truly,

Westinghouse Elec. & Mfg. Co.

W. H. MacGregor.

__________________________________________________ _________

Westinghouse Co. – 0142


Westinghouse Electric & Manufacturing Company,

120 Broadway,
New York, N. Y. 4/9/1902



Mr. Nikola Tesla,
Wardenclyffe, L. I., N. Y.

Dear Sir:

On March 22nd we wrote you in reference to testing set which was delivered to you by Mr. Hamilton of this Company, and ask you to make provision to return this testing set to our works at Pittsburgh.

We do not seem to find that we have received any reply to this letter, and would request that you take the matter up and advise us in reference to same at your early convenience.

Yours truly,

Westinghouse Electric & MFG., Co.

Carbon copy W. Westinghouse Elec. & Mfg. Co.

W. H. MacGregor.

__________________________________________________ _________

Westinghouse Co. – 0143


New York, Dec. ?th, 1901.
46 & 48 East Houston Str.


Westinghouse Elec. & Mfg. Co.,
Pittsburgh, Pa.

My dear Mr. Scott:

Since seeing you last, I have thought owing --- --- which --- --- --- the transformer and it --- --- that over --- --- --- --- --- instead of --- --- that your objections as to the plans --- proposed by me are serious, since it can be a question of a small variation in the ---.

Will you kindly think a little over the matter and see --- --- I could not waist the --- transformers as proposed, instead as even --- yourself formulating it would be very much --- --- --- --- --- ---. You will greatly oblige me, if you will --- --- --- your --- and it --- --- --- --- ---, so I may form an obligation.

Awaiting your --- --- and thanking you in advance, I remain,

Yours sincerely,


P.S. In case I could use 4 phases,
I might take a 30,000 volts trans-
former but --- from care “ouf' for
60,000 volts. I --- --- place more copper
--- --- --- --- --- transformers --- --- ---.

__________________________________________________ _________

Westinghouse Co. – 0144


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.

May 12, 1902.


Nikola Tesla, Esq.,
46 & 48 E. Houston St.,
New York, N.Y..

My dear Mr. Tesla:

Your letter May 9th regarding transformers reached me this morning. As I understand the matter it is as follows:

You have a two-phase machine with phases differing 90Ί. You wish to get high voltage from 4 transformers, two voltages differing 45Ί making what would be termed a four-phase outfit. It is important that the four high tension transformers be similar not only in construction but also in operation so that the drop in voltage when delivering current will be the same in each of the four.

After studying over the matter further I believe that the best results will be obtained from the method which I outlined to you when I saw you last week. Two axillary auto-transformers are to be provided. Each of these will have two windings which will be connected across opposite quadrants of the armature winding of the generator. The two windings in each of the two auto-transformers will therefore have the same phase although the windings will differ in potential. I give a diagram below which shows the theoretical arrangement of phases from which you will see that each of the four high voltage is symmetrical and similarly connected to the auto-transformers and to the generator. The two auto-transformers which are shown by parallel lines will be separate coils on a single core. ...

__________________________________________________ _________

Westinghouse Co. – 0145

NT-2
5/12/02.

...

The requirements will therefore be:

4- Transformers, 50 K.W. each, approximately 400 volts to 60,000 alts., to be wound for highest efficiency at overload and with as low copper loss in high tension circuit as is practicable.

2 – Auto transformers corresponding in size to transformers of the ordinary type of 60 K.W. each.

From your postscript it appears that you may be able to use 30,000 volts instead of 60,000 provided by the windings are insulated from the core for 60,000 volts. This would make the transformers slightly cheaper although the difference would not be very great.

I have studied further the plan which was proposed of having the primaries of two of the high tension transformers consist of two parts each of which would be connected to one of the generator phases. This however, would not be an operative connection.

I believe that this information will enable you to decide what course you desire to pursue.

CFS.
Very truly yours,

C.F. Scott
CHIEF ELECTRICIAN.

*******Drawing to be inserted*******

__________________________________________________ _________

[Michelinho]

Westinghouse Co. – 0146-0147-0148-0149-050

Westinghouse Co. – 0146


Westinghouse Electric & Manufacturing Company,

120 Broadway,
New York, N. Y. June 12, 1902

ADDRESS REPLY TO THE COMPANY,
120 BROADWAY,
WORKS, EAST PITTSBURGH, PA.

Mr. Nikola Tesla,
46 East Houston St., City.

Dear Sir:

On April 15th you wrote us in reference to the high tension testing set which was delivered to you on or about April 4th,1901.

At the time you wrote us you advised us that you were unable to make the necessary tests on your generator and that you would need this testing set “for some time longer”.

As you can readily understand our Works are anxious to clear up this consignment account, and we therefore ask you to advise us if you cannot return the testing set to our Works. Your early advice will be appreciated.

Yours truly,

WESTINGHOUSE ELECTRIC &MFG. COMPANY

W. H. MacGregor.

COPY to ACD

__________________________________________________ _______

Westinghouse Co. – 0147


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

June 14th, 1902.


Westinghouse Elec. & Mfg. Co.,
120 Broadway, New York City.

Gentlemen:

I have your favor dated June 12th, and regard to --- in reply, that the statement “for some time longer” contained in your letter relative to the --- --- --- --- --- ---.

When I ordered the --- from the Westinghouse Co. at Pittsburgh, comprising a 60 K.V. --- --- --- --- ---, a --- engine and generator and four high tension transformers an other ---. it was understood that it --- --- --- the testing, but --- get this apparatus. Some of this --- graciously furnished --- months later than ---, --- this will sufficiently --- --- --- --- --- returning you the above testing set.

I hope you are not inconvenienced --- --- writing merely for the sake of formality to have this --- --- ---. The apparatus is perfectly safe in --- --- --- ---, --- --- --- --- --- in any way I shall, of course, pay for the --- ---.

Yours very truly,

__________________________________________________ _______

Westinghouse Co. – 0148


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
ADDRESS ALL COMMUNICATIONS TO
THE COMPANY AND REFER
TO THESE INITIALS ..HDS...
July 19, 1902.


Nikola Tesla, Esq.,
Hotel Wardoff,
New York City.
TRANSFORMERS.

Dear Mr. Tesla:

You will recall that you came into my office during your recent visit at our Works, and made inquiry regarding some transformers which we are building for you, and which you ordered from us through Westinghouse, Church, Kerr & Co. Mr Lange our manager of Works, has looked into the situation very carefully, and in view of your former connection with the Company, Mr. Lange has used extraordinary efforts to work in a day on these transformers, and he has directed me to advise you that he will complete two of your large transformers on August 15th and the other two large ones possibly by September 1st. The two small transformers we cannot complete until August 9th, which is the date which has already been given to you.

During your visit here, you were also talking with Mr. Lamme about the 10 KW rotary of special design for some particular work. We are writing to Westinghouse, Church, Kerr & Co. in connection with this rotary, giving them figure upon same, and if you still have this matter in mind, you can consult them and place your order through them. It will take us 65 days to get out the 10 KW 125 v., 7200 alts. Rotary, such as you describe to us.

__________________________________________________ _______

Westinghouse Co. – 0149


Mr. Tesla #2.

We trust that the above information is of a highly satisfactory nature. We are sending a copy of this letter to Mr. Sniffin of Westinghouse, Church, Kerr & Co., as in general, we desire all of this correspondence to go through Mr. Sniffin, as he is looking after your particular plant.

Yours very truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

Per Henry D. Shule?
HDS/B

__________________________________________________ _______

Westinghouse Co. – 0150


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

June 14th, 1902.

Mr. Henry D. Shule
Westinghouse Electric & Mfg. Co.,
Pittsburgh, Pa.

Dear Sir:


*******Will return to it later.*******

__________________________________________________ _______

[Ernst]

Michel, do take care yourself.
You'll find that spending the rest of your life looking like this may lead to confusion in the people you are dealing with.



Ernst.

[Michelinho]

Michel, do take care yourself.
You'll find that spending the rest of your life looking like this may lead to confusion in the people you are dealing with.



Ernst.

If I don't take care, they will start calling me bug-eye Mickey.

After the Westinghouse Company folder, what is left is mainly handwriting, the 2 RU Johnson and 1 Long Island folders. The Long Island folder will need some serious work, mainly with a publishing application, mix of graphics and texts. I'll have to check Scribus, since my workstations are setup with Linux Mint 17.3.

Have a nice weekend,

Michel

[Michelinho]

Westinghouse Co. – 0151-0152-0153-0154-0155

Westinghouse Co. – 0151


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

June 14th, 1902.


Westinghouse Elec. & Mfg. Co.,
--- --- ---.

Gentlemen:





*******Will return to it later.*******


__________________________________________________ _________

Westinghouse Co. – 0152


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
ADDRESS ALL COMMUNICATIONS TO
THE COMPANY AND REFER
TO THESE INITIALS ...HDS...
July 19, 1902.


Nikola Tesla, Esq.,
Laboratory,
Wardenclyffe, L. I.

Dear Mr. Tesla:

We have your letter of the 23rd inst., and note your inquiry regarding the rotating transformer of 10 K.W. capacity.

Your letter has been given the careful consideration of our Assistant Chief Engineer, Mr. Lamme, who advises that the best way of attacking the problem will be to build one of our standard 10 K.W. rotary converters as originally proposed. This will mean the shortest shipping date possible, as it would take us very much longer to follow out the scheme which you propose.

We wish to assure you, however, that if it is at all possible to cut down the 65 day date which we gave you on the 10 K.W. machine, every effort will be made to do so.

Very truly yours,

WESTINGHOUSE ELECTRIC & MFG. CO.

HDS:BH By Henri D. Shute


__________________________________________________ _________

Westinghouse Co. – 0153


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

July 23rd, 1902.

Mr. Henry D. Shule
Westinghouse Electric & Mfg. Co.,
Pittsburgh, Pa.

Dear Sir:



*******Will return to it later.*******


__________________________________________________ _________

Westinghouse Co. – 0154


Westinghouse Electric & Manufacturing Company,

120 Broadway,
ADDRESS REPLY TO THE COMPANY,
120 BROADWAY,
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. Aug. 8, 1902



Mr. Nikola Tesla,
Wardenclyffe, Long Island, N.Y.

Dear Sir:

Referring to your letter of June 14th, we would ask if it is not possible for you to now give a definite date for the return of the testing set which you now have on consignment, Our Works have again written us on this subject, stating that they are very anxious to cancel this consignment account. Your early reply will oblige

Yours truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

W. MacGregor.


__________________________________________________ _________

Westinghouse Co. – 0155


Westinghouse Electric & Manufacturing Company,

120 Broadway,
ADDRESS REPLY TO THE COMPANY,
120 BROADWAY,
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. Nov. 20th, 1902



Mr. Nikola Tesla,
Wardenclyffe, Long Island, N.Y.

Dear Sir:

Referring to your letter of August 14th, regarding testing set, we have to advise you that our Works inform us that the transformers were shipped to you during the latter part of August, the last shipment being made on August 28th. We therefore ask whether you are now prepared to return the testing set originally loaned to you, and if not, when you will be. Kindly advise us at an early date,

Yours truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

W. H. Harbinger

__________________________________________________ _________

[Michelinho]

Westinghouse Co. – 0156-0157-0158-0159-0160

Westinghouse Co. – 0156


Westinghouse Electric & Manufacturing Company,

120 Broadway,
ADDRESS REPLY TO THE COMPANY,
120 BROADWAY,
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. Dec. 5th, 1902



Mr. Nikola Tesla,
Wardenclyffe, Long Island, N.Y.

Dear Sir:

Referring to your letter of Nov.20th, signed by Mr. Scherff in reference to a testing set belonging to this Company, we would ask if you are not now in a position to return this to our Works. If not, kindly advise us a definite date on which you can do so.

We ask this as we are periodically in receipt of letters from our Works asking about this matter and we should be glad to give them some definite information which will make further correspondence unnecessary.

Yours truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

W. H. Harbinger

__________________________________________________ _________

Westinghouse Co. – 0157


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

Dec. 23rd, 1902.

Mr. Henry D. Shule
Westinghouse Electric & Mfg. Co.,
Pittsburgh, Pa.

Dear Sir:


*******Will return to it later.*******

__________________________________________________ _________

Westinghouse Co. – 0158

THE WESTERN UNION TELEGRAPH COMPANY.

5.10pm

1__________rn__________dn__________H2 Raid__________~~~~~~

RECEIVED Feby 2nd 1903

DATED Cost Pittsburgh Ra 21

TO Mr. Nikola Tesla

Wardenclyffe L.I. N.Y.

Your telegram 1st Ncd. Field turns on 220 Kl20 generator 32 turns 16 by 3/4 inch and 55 turns 1/16” by 1 inch total 87 turns.

WESTINGHOUSE ELEC. & MFG. CO.

__________________________________________________ _________

Westinghouse Co. – 0159


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
ADDRESS REPLY TO THE COMPANY,
120 BROADWAY,
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. Feb. 21, 1903



Mr. Nikola Tesla,
Wardenclyffe, Long Island, N.Y.

My dear Sir:

When I saw you last in New York you requested me for some data upon the generator which we recently furnished you. You will find this data upon the accompanying sheet. If there is anything further which you desire kindly let me know. I was very much interested in the talk which we had regarding electrical matters of the present and future and I am very sorry that we did not have an opportunity to talk longer.

With very best wishes, I am,
CFS.
Enclosures. Very truly yours

Chast Scott
Chief Electrician.

__________________________________________________ _________

Westinghouse Co. – 0160


Westinghouse Electric & Manufacturing Company,

120 Broadway,
ADDRESS REPLY TO THE COMPANY,
120 BROADWAY,
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. March 28, 1903.



Mr. Nikola Tesla,
Wardenclyffe, L. I.

Dear Sir:

Referring to the testing set which you have on consignment, we would inquire if you can give us a definite date as to its return. We do not wish to hurry you in this matter but the Works are very anxious to close this account and your early advices will be appreciated.

Yours truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

W. MacGregor.

__________________________________________________ _________

[Michelinho]

Westinghouse Co. – 0161-0162-0163-0164-0165

Westinghouse Co. – 0161


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

March 30th, 1903.

Westinghouse Elec. & Mfg. Co.,
120 Broadway, New York.

Gentlemen:

Replying to your favor of March 28th I wish to state, that I am very much obliged for the friendly service you have rendered me in loaning me the testing set. I am just beginning to work on my machinery and anticipate that I shall be through with it very shortly, but the exact date I cannot tell. I hope, therefore, that you will permit me to retain it a little longer. It is possible, however, that I may make you a proposition in regard to it in a few weeks from now.

Thanking you again, I remain,

Yours very truly,

__________________________________________________ _________________

Westinghouse Co. – 0162


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
OFFICE OF
L. A. OSBORNE
FOURTH VICE PRESIDENT.
December 12th, 1903.



Mr. Nikola Tesla,
46 East Houston Street,
New York City.

My dear Sir:

In March or April, 1901 we directed our engineer in New York to deliver you at East Houston Street one high tension testing outfit. You advised us at the time that you desired to borrow this for some months.

We now have very urgent need for this testing outfit and we would request that you deliver the same to our Mr. R. L. Wilson of our Construction department, 208 East 74th Street, New York.

We have advised Mr. Wilson to make arrangements with you regarding its return and we trust that it will be agreeable for you to do so at this time.

Yours truly,

L. A. OSBORNE
Fourth Vice President.

__________________________________________________ _________________

Westinghouse Co. – 0163


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
ADDRESS ALL COMMUNICATIONS TO
TO THE COMPANY AND REFER
TO THESE INITIALS...RCH...
Jan. 5th, 1904



Mr. Nikola Tesla,
#46 East Houston St.,
New York City, N.Y.

My dear Sir:

Your letter of Dec. 25th was duly received by us and we have noted your request as to the billing to you of the testing outfit which was loaned to you in March or April 1901.

Our price on this outfit to you will be One Thousand Two Hundred Seventy-five Dollars ($1275), which is an especially low confidential price.

Before we take any action regarding the billing of this apparatus to you, we believe it would be well for you to send us in your formal order covering this material, so that everything may be in proper shape.

Kindly let us hear from you at the earliest date possible.

Yours truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

RCH-EG J. N. Koelord?

__________________________________________________ _________________

Westinghouse Co. – 0164


COPY.
The Waldorf-Astoria, New York.
Jan. 10, 1904.

Westinghouse Elec. & Mfg. Co.,
Pittsburgh, Pa.

Gentlemen:

Replying to your favor of Jan. 6 relative to the small testing outfit, I beg to ask whether you would let me pay you this apparatus by a note for a generous term, of course, with interest added.

Some of my affairs are shaping themselves well and in a short time I expect to have more money than “to know what to do with”. I shall also begin to receive a steady income from two or three sources soon. But for the moment I am landed high and dry. The high potential and high frequency business was too much for my bank account. If this is agreeable, I will send you a formal order as requested.

Thanking you for your friendly services, I am,

Yours very truly,

__________________________________________________ _________________

Westinghouse Co. – 0165


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
OFFICE OF
L. A. OSBORNE
FOURTH VICE PRESIDENT.
January 19th, 1903.



Mr. Nikola Tesla,
46 East Houston Street,
New York City.

My dear Sir:

referring to your letter of January 11th in the matter of the testing set; I have to advise you that in my absence your letter was replied to and the impression given that it was our desire to sell this piece of apparatus. As the matter stands, we are very much in need of the testing set for work which we have in progress, as it is impossible for us to make one and get it ready in time for the work which we have behind. It therefore becomes imperative that you return the one which we have lent you and which you have had for over two years.

If it is your desire to have a new one, we should prefer to enter your order and make one and send it to you. We are much in need at the present time of the one you have and will be greatly obliged if you will send it to Mr. R. L. Wilson, care of Interborough Power House, 59th Street, New York.

Yours truly,

L. A. Osborne
Fourth Vice President.

__________________________________________________ _________________

[Michelinho]

Westinghouse Co. – 0166-0167-0168-0169-0170

Westinghouse Co. – 0166


The Waldorf-Astoria, New York,
Copy.
Feb. 9th, 1904.


WESTINGHOUSE ELECTRIC & MFG. CO.
Pittsburgh, Pa.

Gentlemen:

Since two weeks I have been daily expecting to go to Niagara Falls and I intended to see you on my return from there in regard to the testing set, and also to shake hands with my old friends again.

I have been very much disappointed by your letter of Jan. 19th, --- --- --- --- --- --- --- --- account. The fact is that I have long --- --- --- this instrument as bought from you and I have --- --- --- myself is --- a --- of charges, adapting it to my special work. To change it back to its original form would be rather difficult, if not impossible. There is no way out of it except to --- --- on your own --- a --- set and let me pay you for this one the amount you have ---. It will not be necessary to give you a --- --- this I can arrange to pay you cash (will insure --- --- --- ---). Kindly let me know your wishes in regard to the matter.

I would be very sorry indeed, should I cause you any serious inconvenience.

Yours very truly,

N. Tesla.

__________________________________________________ _______________

Westinghouse Co. – 0167


Westinghouse Electric & Manufacturing Company,

11 PINE STREET.
ADDRESS REPLY TO THE COMPANY
11 PINE STREET
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. May 25th, 1904.



Mr. Nikola Tesla,
Wardenclyffe, L. I.

Dear Sir:

Referring to your call at the office on May 11th and to our conversation regarding the possibility of our supplying you with a line of small induction motors to be used in connection with your speed controlling device, our works advise that they will soon send to me all the information which you requested me to get for you. Immediately upon its receipt, I shall be glad to advise you.

Very truly yours,

WESTINGHOUSE ELECTRIC & MFG. CO.

W. H. Stetson
WCH/AF

__________________________________________________ _______________

Westinghouse Co. – 0168


Westinghouse Electric & Manufacturing Company,

11 PINE STREET.
ADDRESS REPLY TO THE COMPANY
11 PINE STREET
WORKS, EAST PITTSBURGH, PA.
New York, N. Y. Jly. 12, 1904.



Mr. Nikola Tesla,
Wardenclyffe, L. I.

Dear Sir:

Referring to your letter of May 29th I have just returned from an absence from the office and am anxious to know whether or not you have received the particulars regarding the small motors about which we talked when you were in the office sometime ago. If you have not received the information kindly advise me and I will try to ascertain why you have not received it.

Yours very truly,


WESTINGHOUSE ELECTRIC & MFG. CO.

W. H Stetson
WHS/MR

__________________________________________________ _______________

Westinghouse Co. – 0169


TESLA LABORATORY,
Wardenclyffe, Long Island, N.Y.

July 20th, 1904.

Mr. W. C. Stetson
Westinghouse Elec. & Mfg. Co.,
11 Pine Str., at Work.

Dear Sir:

*******This one is much faded.*******

__________________________________________________ _______________

Westinghouse Co. – 0170


Westinghouse Electric & Manufacturing Company.

Pittsburgh, Pa., Dec. 23, 1904.

Mr. Charles A. Lieb,
Manhattan Transit Co.,
250 East 48th St.,
New York City.

Dear Sir:

I have your letter of Dec. 20th in which you propose the use of induction motors for automobiles, and we would advise you that we consider the induction motor poorly adapted for this class of service. The use of induction motors involves the employment of an alternating current generator and this requires direct current for excitation, so that you make your outfit unduly complicated; further, an induction motor is essentially a constant speed motor, and the conditions of traction require a motor of variable speed characteristics, such as is found in the direct current series motor. In other words, we believe that this is about the worst condition that could be conceived for the use of induction motors. Our suggestion is for a device of this kind that you use direct current apparatus.

We shall be glad to be of any assistance to you in your study of the problem and shall be glad to hear from you further in the matter.

Yours truly,
L. A. Osborne,
Third Vice-President

__________________________________________________ _______________

[Michelinho]

Westinghouse Co. – 0171-0172-0173-0174-0175

Westinghouse Co. – 0171


March 5, 1908.


Westinghouse Electric & Mfg. Company,
111 Broadway,
New York City.

Gentlemen:

We are installing some high speed machinery and would like to use two or three phase induction motors, preferably 2300 volts, 60 cycles. These motors should run 1600 to 2000 revolutions or more. Capacity will range from 500 to 300 H.P.

Will you be kind enough to inform us whether you have such motors on hand, and if not, how near can you come to these specifications, or how long it would take to furnish special motors for such purposes.

Very truly yours,


Engineer.

__________________________________________________ _______________

Westinghouse Co. – 0172


165 Broadway, New York,
October 23, 1908.

C. F. Scott, Esq.
Westinghouse Electric & Mfg. Co.
Pittsburgh, Pa.

My dear Mr. Scott:

I am installing for a manufacturing concern a device of my invention, and will require a three-phase induction motor about 60 H.P. to operate at 60 cycles, 220 volts and at as high a speed as possible. I see from the catalog of the General Electric Company that they have built such motors for speeds of 1800 revolutions. These are evidently four pole motors. What I would want to know from you is whether you could not furnish me a two pole motor which will then run 3600 revolutions. This would be much more suitable for my purpose. The order for the machine will be placed by the concern to whom I have referred.

I shall be very much obliged to you for a prompt answer.

With kind regards, believe me,

Very truly yours,

__________________________________________________ _______________

Westinghouse Co. – 0173


165 Broadway, New York,
October 28, 1908.

C. F. Scott, Esq.
Westinghouse Electric & Mfg. Company,
Pittsburgh, Pa.

My dear Mr. Scott:

As I have decided to take the 60 H.P. motor about which I have already written, it will be necessary for me to get blueprint of same in order to make a plan for a new common base upon which will be coupled directly to your motor. I only want the outlines and the size of the shaft.

I shall see the order for this machine is placed forthwith. In the meantime, I shall be obliged to you if you will kindly have this print forwarded or else refer me to your catalogs from which I can gather the necessary information.

With regards,

Yours sincerely,

__________________________________________________ _______________

Westinghouse Co. – 0174


165 Broadway, New York,
October 28, 1908.

Westinghouse Electric & Mfg. Company,
Pittsburgh, Pa.

Gentlemen:

I have been since some time designing machinery of a novel kind which is shortly to be installed. My associates would like to get a few turbines for this purpose.

Knowing that you are pioneers in this field, I write to know whether you have units of from 500 to 600 H.P. condensing, running at about 3000 revolutions or more. I would be very glad to recommend your machinery, knowing its excellency.

You will greatly oblige me by an early answer furnishing the necessary information.

Believe me,

Very truly yours,

__________________________________________________ _______________

Westinghouse Co. – 0175


165 Broadway, New York,
November 5, 1908.

William Nesbit, Esq,
Westinghouse Electrical Mfg, Co.
165 Broadway, City.

My dear Sir:

I would like to know whether the Westinghouse Electrical Mfg. Co. are furnishing smaller motors of the same type as the 60 H.P. machine in regard to which I have already communicated with you. If so, will you be kind enough to let me have a list of these motors, and oblige,

Very truly yours,

__________________________________________________ _______________

[Michelinho]

Westinghouse Co. – 0176-0177-0178-0179-0180

Westinghouse Co. – 0176


165 Broadway, New York,
November 13, 1908.


William Nesbit. Esq.
Westinghouse Electric & Mfg. Company,
165 Broadway, City.

Dear Sir:

I wish to thank you for the list of induction motors manufactured by the Westinghouse Company, which has duly reached me. As soon as we have settled on the types, I shall communicate with you in regard to the matter.

Very truly yours,

__________________________________________________ ___________

Westinghouse Co. – 0177


165 Broadway, New York,
December 8, 1908.


W. Nesbit, Esq.
Westinghouse Electric Mfg. Co.
165 Broadway, City.

Dear Sir:

I have received your table descriptive of COL Polyphase motor, for which I am much obliged. I shall communicate with you very shortly in regard to the matters we have had under consideration since some time.

Very truly yours,

__________________________________________________ ___________

Westinghouse Co. – 0178

165 Broadway, New York,
December 29, 1908.


C. F. Scott, Esq.
Westinghouse Electric Mfg. Company.
Pittsburgh, Pa.

My dear Mr. Scott:

I wish to thank you for the Christmas remembrance and sentiments expressed, and which I heartily reciprocate. In the near future I may have the pleasure of seeing you as some business may necessitate my coming to Pittsburgh.

With respectful regards to Mrs. Scott, I remain,

Sincerely yours,

__________________________________________________ ___________

Westinghouse Co. – 0179

165 Broadway, New York,
December 30, 1908.


C. F. Scott, Esq.
Westinghouse Electric Mfg. Company.
Pittsburgh, Pa.

My dear Mr. Scott:

You may not know that I have made some very fine inventions which I am about to put on the market, and I shall require for driving my machinery, about one million induction motors, but as I have learned to go slow, I shall take only one at first. The American & British Mfg. Company is placing an order for a 50 HP. Three -phase induction motor, and I am writing to ask you to be kind enough to see that the machine is completed and shipped as soon as possible.

With kind regards and best wishes for the New Year, I remain,

Yours sincerely,

__________________________________________________ ___________

Westinghouse Co. – 0180

165 Broadway, New York,
January 12, 1909.


C. F. Scott, Esq.
Chief Electrician,
Westinghouse Electric Mfg. Company.
Pittsburgh, Pa.

My dear Mr. Scott:

Referring to our previous correspondence, I am anxious to get the 50 HP. Induction motor as soon as possible that I shall be very much obliged to you for anything you may do in hastening the delivery. Will you be kind enough to do so and also drop me a line when you expect to ship it to the Corlias works at Providence, R. I.

With kind regards,

Yours sincerely,

__________________________________________________ ___________

[Michelinho]

Westinghouse Co. – 0181-0182-0183-0184-0185

Westinghouse Co. – 0181


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
CHAS. F. SCOTT,
CONSULTING ENGINEER.
January 19, 1909.



MR. NIKOLA TESLA,
165 Broadway,
New York City.

My dear Mr. Tesla:

I find that the 50 H.P. induction motor for you, which is being built on our S.O.?340482, is somewhat out of the ordinary, as it requires new winding s adapting it for two poles. This special work, of course, requires time. Every effort will, however, be made to hurry the work through promptly and to keep things moving. At best it will be about the first of March before the motor can be shipped. We will endeavor to anticipate this date if practicable.

Very truly yours,

Chast. F. Scott

FS:JCB Consulting Engineer.

__________________________________________________ _________

Westinghouse Co. – 0182

New York, January 20, 1909.
165 Broadway.


C. F. Scott, Esq.
Westinghouse Electric Mfg. Co.
Pittsburgh, Pa.

My dear Mr. Scott:

I have just received your letter of 19th from which I learn that the motor is not likely to be delivered before March 1st.

I have wired you to-day and in confirmation of my dispatch, will say that I shall be greatly obliged to you if you will do whatever you can to anticipate that date, if possible.

With kind regards,

Yours sincerely,

__________________________________________________ _________

Westinghouse Co. – 0183

POSTAL TELEGRAPH COMMERCIAL CABLES

TELEGRAM

January 20, 1909.

C. F. Scott,
Westinghouse Electric Mfg, Co.
Pittsburgh, Pa.

Oblige by hurrying delivery of induction motor. Of great importance for me.

Tesla.

Chge, AM. & BRIT. MFG. CO.

__________________________________________________ _________

Westinghouse Co. – 0184

165 Broadway, New York,
February 8, 1909.



Charles. F. Scott, Esq.
Westinghouse Electric Mfg. Company,
Pittsburgh, Pa.

My dear Mr. Scott:

I have not yet heard anything in reply to my letter referring to the date of shipment of the induction motor ordered for the Corliss works. This motor is to form a part of a small outfit which I am preparing for the market, and as I have been in want of funds for three years, I am naturally anxious to get some returns for the gray matter expended in developing these inventions. Oblige me by letting me know when I may expect the machine.

With kind regards,

Yours sincerely,

__________________________________________________ _________

Westinghouse Co. – 0185


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
CHAS. F. SCOTT,
CONSULTING ENGINEER.
February 20, 1909.



MR. NIKOLA TESLA,
165 Broadway,
New York City.

My dear Mr. Tesla:

I have been keeping track of the motor in which you are interested, making inquiry with regard to it from week to week and seeing that the best attention is given to its progress. Mr. Nesbit, I understand, has been in touch with you from time to time with regard to this motor. When I wrote you before, I said the motor was scheduled to be completed the early part of March. It is now nearly ready for test and unless some mishap develops, it is expected that shipment can be made during the early days of the coming month.

I trust that the motor will do all that is expected of it and that the outcome may be satisfactory to all.

With best wishes,

Very truly yours,

Chast. F. Scott

CFS:JHP Consulting Engineer.

__________________________________________________ _________

[Michelinho]

Westinghouse Co. – 0186-0187-0188-0189-0190

Westinghouse Co. – 0186


165 Broadway, New York,
February 20, 1909.


William Nesbit, Esq.
Westinghouse Electrical Mfg. Company,
165 Broadway, City.

My dear Mr. Nesbit:

Replying to your favor of yesterday just received, I wish to thank you and all my other friends of the Westinghouse Company in hurrying this job through. I hope that you will find that your trouble will be rewarded.

Sincerely yours,



Westinghouse Co. – 0187

165 Broadway, New York,
February 26, 1909.



Charles. F. Scott, Esq.,
Westinghouse Electric & Manufacturing Co.,
Pittsburgh, Pa.

My dear Mr. Scott:

It was impossible for me, on account of pressing matters, to acknowledge before this your kind letter of February 20th.

I hope that the motor will prove adequate to the tests and that it will be shipped next week as everything else is ready. If my expectations are fully realized I should have use for a good many of your motors.

With kind regards, believe me,

Yours sincerely,

__________________________________________________ ___________

Westinghouse Co. – 0188


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
WORKS, EAST PITTSBURGH, PA
In reply please address the company
and refer to ....................................
Mar. 8, 1909.



MR. NIKOLA TESLA,
165 Broadway,
New York City.


SUBJECT: AMERICAN & BRITISH COMPANY.

Dear Sir:

We are sending herewith two copies of drawing #158800, showing the 50 H.P. motor which we are furnishing you complete with shaft extension. We believe we gave you some dimension leaflets, but do not know whether or not they showed the shaft extension. This information is for your files.

The factory advised last week that they expected the meter to go forward to-day, by express.

Very truly yours,

Westinghouse Electric & manufacturing

Wm. Nesbit

The motor went forward by express on Monday of this week.

WN-BC
Enclosures.

__________________________________________________ ___________

Westinghouse Co. – 0189


165 Broadway, New York,
March 10, 1909.


William Nesbit, Esq.
Westinghouse Electrical Mfg. Co.,
165 Broadway, City.

My dear Sir:

Acknowledging your favor of March 8th, I would like to forward a set of blue prints of the induction motor furnished to the Corliss works for future reference. We are apt to require a good many of these motors, and it is necessary tor me to keep all the records on file here, while at the same time furnishing to the works a duplicate.

Thanking you in advance for the trouble, I remain,

THANKING YOU IN ADVANCE

__________________________________________________ ___________

Westinghouse Co. – 0190


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
WORKS, EAST PITTSBURGH, PA
In reply please address the company
and refer to ....................................
Mar. 12, 1909.



MR. NIKOLA TESLA,
#165 Broadway,
N. Y. C.


SUBJECT: AMERICAN & BRITISH COMPANY.

Dear Sir: AMERICAN & BRITISH MFG. COMPANY.

We acknowledge a receipt of your letter of the 10th inst., and kindly note that as requested, we are forwarding to-day to the Corliss Steam Engine Works, Providence, R.I. one copy of blue print of the induction motor, recently ordered by you and shipped to them on March 6th.

Trusting that this is satisfactory, we remain,

Yours very truly,

WESTINGHOUSE ELECTRIC & MFG. CO.

NT/BRK e. a. Gilden.

__________________________________________________ ___________

[Michelinho]

Westinghouse Co. – 0191-0192-0193-0194-0195

Westinghouse Co. – 0191


165 Broadway, New York,
March 13, 1909.


Westinghouse Electrical Mfg. Co.,
165 Broadway,
New York City.

Gentlemen:

I wish to acknowledge receipt of your favor of March 12th and thank you for the prompt attention to this small matter.

Very truly yours,

__________________________________________________ ______________

Westinghouse Co. – 0192

*******Need special formating*******

__________________________________________________ ______________

Westinghouse Co. – 0193

No. 165 Broadway,
New York, March 27th, 1909.


Mr. C. F. Scott,
Chief Electrician,
Westinghouse Electric & Mfg. Co.,
Pittsburgh, Pa.

My dear Mr. Scott:

It appears in starting the motor you have furnished to the Corliss Works, the armature became overheated and the soldering joints injured. That, at least seems to me the cause of the trouble, and it agrees with what your Mr. Nesbit told.

However, for a fifty horse power machine, the motor seems to be too small, and it might be preferable to use a larger frame, although I am sure it will not have to develop more than 50 H. P. This is a suggestion for the future. There has been another motor ordered of the same size, and you will greatly oblige me if you will rush it through same as the first. I do not think there is any necessity of having the larger frame on these two motors, but on future orders for the same capacity, it might be better to have the larger margin.

I hope that the necessary repairs will be made without delay,

With kind regards, believe me,

Sincerely yours,

__________________________________________________ ______________

Westinghouse Co. – 0194


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
CHAS. F. SCOTT,
CONSULTING ENGINEER.
March 30, 1909.



MR. NIKOLA TESLA,
165 Broadway,
New York City.

My dear Mr. Tesla:

I have your letter of March 27th regarding the motor recently furnished to the Corliss Works and regrets very much to note that the combination of motor and fan is unsatisfactory. I have gone over the reports received from Mr. Nesbit with our engineers and it seems quite clear to us that the load upon the motor is excessive. This conclusion is drawn from several considerations:

1st – The motor accelerates slowly, apparently because the torque required by the load at low speed is just about equal to that develop by the motor. This indicates that the load is relatively large for the motor. More rapid acceleration could probably be secured by giving the motor a high initial voltage.

2Nd – The reading of 160 Amperes taken when the motor is running a fan, indicates a load upon the motor of approximately 67 H.P. (this suppose that the three phases of the supply circuit are symmetrical and supply equal current at equal voltage to the motor). Accepting this reading as a correct indication of the power to the motor, the motor is clearly overloaded.

3Rd – The temperature reported for one hour's run ...

1

__________________________________________________ ______

Westinghouse Co. – 0195

-2- 3.30.09.

... Is far greater than the temperatures taken on tests here at the Factory. Our tests were made at 40 H.P. and gave a maximum rise of 34 ° at the end of four hours. The temperature of 55 ° at the end of one hour, made running a fan, indicated a load considerably in excess of 50 H.P.

4th – The melting of the solder on the secondary indicates high losses and overload upon the motor. The secondary connections, however, are bolted and the ends of the secondary winding are then dipped in solder. The fact that the temperature has risen to the melting point and some of the solder has been thrown off has probably resulted in little or no damage to the secondary.

The best conclusions from the reports made are, therefore, to the effect that the motor is called upon to carry a load far in excess of that for which it was made. A regular report is being sent to Mr. Nesbit, who will inform you officially. As he will inform you, we are holding work on the second motor awaiting further instructions as to its size. It seems clear to us that it should be made larger, probably 60 or 70 H.P. We are not familiar here with the preliminary test on which the first estimate of the power required by the motor was made. You may find it best to investigate further as to the actual power required, if you do not feel justified in accepting the report of the test which has already been made.

Unless, however, you decide on further tests, it would ...

2
__________________________________________________ ______________

[Michelinho]

Westinghouse Co. – 0196-0197-0198-0199-0200

Westinghouse Co. – 0196

-3- 3.30.09.

seem advisable for you to advise us to proceed with the second motor on the basis of the ability to carry a steady load of, say 70 H.P.

Very truly yours,

Chast F. Scott

CFS:JHP Consulting Engineer.


__________________________________________________ ______________

Westinghouse Co. – 0197

Form ??? Revised-11-0?-0?

MEMORANDUM FROM

C. F. SCOTT

CONSULTING ENGINEER.

............................3/30/09.............

Mr. ...........Nesbit................................. ..............

This letter to Mr. Tesla is in reply to one he sent me.

I suggest you take it on sending to him

Chast F. Scott

__________________________________________________ __________________

Westinghouse Co. – 0198

No. 165 Broadway,
New York, April 8th, 1909.


C. F. Scott, Esq.
Chief Electrician,
Westinghouse Electric & Manufacturing Co.
Pittsburgh, Pa.

My dear Mr. Scott:

Mr. Nesbit has duly transmitted to me your letter of March 30th, for which I thank you.

The arguments you make would be of the order of these of Euclid, if they had not been based on erroneous assumptions. The figures given to you are entirely wrong, for I have myself taken readings and have found that the maximum current in each phase is less than fifty amperes. The figures given to you were evidently obtained
I would like you to ignore the reports until I have myself had an opportunity to make conclusive tests of which I shall write you. In the meanwhile, please do not delay the work on the second motor which is intended for a different purpose.

Yours very truly,


__________________________________________________ ______________

Westinghouse Co. – 0199


165 Broadway.
New York, April 2nd, 1909.


William Nesbit, Esq.
Westinghouse Electric & Manufacturing, Company,
Pittsburgh, Pa.

Dear Sir:

I have just received the results of tests with motor, for which I am obliged to you. It is very likely that I shall be able to test the machine myself in a day or two. I have no doubt that the motor is in good order.

I have already written to Mr. Scott that there is no necessity for delaying the work on the other motor. On the contrary I shall be much obliged to you if you will see that it is turned out as quickly as possible.

Yours very truly,


__________________________________________________ ______________

Westinghouse Co. – 0200

165 Broadway,
New York, April 8th, 1909.


C. F. Scott, Esq.
Chief Electrician,
Westinghouse Electric Manufacturing Co.
Pittsburgh, Pa.

My dear Mr. Scott:

As I anticipated, the reports you received in regard to power consumption of motor furnished to the Corliss Works were entirely wrong. The motor only took forty-three amperes in each circuit, and on the basis of the meager data furnished by you in regard to the power factor and efficiency at loads far below the normal I found that the watts were only amounting to 19 or 20 H. P. It could not have been much more because of motor turning 3510 revolutions per minute while performing the work. As I am uncertain in regard to the efficiency and power factor, I would be much obliged to you if you will kindly supply the necessary information by furnishing efficiency and power curves. I understand, of course, that this is a new type of motor which you have not extensively investigated, but you could give me fairly accurate curves for my own personal use, basing yourself on the results with a type of motor closely resembling that one. The power factor at full load is very remarkable indeed.

__________________________________________________ ______________

[Michelinho]

Westinghouse Co. – 0201-0202-0203-0204-0205

Westinghouse Co. – 0201


3/8/09.
C. F. S. No. 2.


... I had no opportunity while in Providence of making careful measurements, but I notice that one of the circuit was considerably excelling the other two in current and electromotive force. It is also an undeniable fact that the motor heats up more than it ought, 46 ° C above temperature of room after 3 1/2 hrs. Run. This might possibly have been due to the slow starting of the motor, which consumes fully three minutes. Your suggestion of raising the electromotive force in order to quicken the attainment of anychronism is not practicable, but you might get us a special starting box which will accomplish the same thing.

Please let us know as soon as possible what you think of the matter.

Very truly yours,

__________________________________________________ __________

Westinghouse Co. – 0202


Westinghouse Electric & Manufacturing Company,

Pittsburgh, Pa.
CHAS. F. SCOTT,
CONSULTING ENGINEER.
April 12, 1909.



MR. NIKOLA TESLA,
165 Broadway,
New York City.

My dear Mr. Tesla:

I have your letter of April 8th regarding the motor furnished the Corliss Works, which was built on our Stock Order No. 340842. You say that the motor took only 43 amperes in each circuit, and later on you say you notice that one of the circuits was considerably excelling the other both in current and e.m.f. This shows an unbalanced condition of some sort, and the fact that the e.m.f., as well as the current, is unbalanced, makes it seem probable that the difficulty is not in the motor but in the supply circuit. If the several phases are unequal in voltage, then, of course, the currents are unequal, and the motor is not working under normal conditions. This may be the factor causing the low rate of acceleration, and also in causing the high temperature.

I understand that the auto-starter which was supplied with the motor can be connected for different starting voltages, so that it will probably be a simple matter to apply a higher voltage during the starting ...

1

__________________________________________________ __________

Westinghouse Co. – 0203

NT-2
4.12.09.

... period, thus enabling the motor to come up to speed quickly.

Mr. Nesbit, of our New York Office, is being furnished with performance curves of this motor, which he will transmit to you.

Very truly yours,

Chas. F. Scott
CFS:JCS Consulting Engineer.

Copy to
Mr. Wm Nesbit,
New York Office.

P.S. - The foregoing was dictated on April 9th, but has inadvertently been delayed until the 12th.

I received this morning your letter of April 10th, in which you say that the reading of 160 amperes which was reported to us and referred to in my letter of March 30th must evidently be a mistake. I have forwarded Mr. Nesbit copies of an approximate performance curve on the motor. I trust that you and he will be able to lay out a program of tests which will locate the difficulty, as the information at hand is certainly conflicting and unsatisfactory.

C. F. S.

P.S.-2 – Our Mr. Kester tells me that he has just talked with Mr. Nesbit by telephone and learns that Mr. Nesbit saw you this morning and that plans are satisfactorily arranged between you. C.F.S.

__________________________________________________ __________

Westinghouse Co. – 0204


165 Broadway, New York,
April 24th, 1909.


My dear Sir:

Will you be kind enough to let me know, at your earliest convenience, when we may expect the second motor we have ordered, for the American & British Mfg. Co. The work on my machine is so far progressed that we will very soon want the motor.

Thanking you in advance, I remain,

Very truly yours,

William Nesbit, Esquire,
Westinghouse Electrical Co.,
165 Broadway, New York.

__________________________________________________ __________

Westinghouse Co. – 0205


165 Broadway, New York,
April 28th, 1909.


My dear Sir:

I wish to acknowledge receipt of your favor of even date, and thank you for the prompt attention. I shall hope that the shipment will not be delayed.

With reference to the other motor, I have already instructed the American & British Mfg. Co., to dismantle the same as soon as the second motor arrives and communicate with you, with a view of putting it in good order. There is no doubt that there is something the matter with the armature, and it is very probable that your supposition, that the soldered joints have been injured, is correct.

William Nesbit, Esq.,
Westinghouse Electric Mfg. Co.,
165 Broadway, New York.

__________________________________________________ __________