Hendershot Replications

[Gazzasore]

A video worth Promoting

Video

[morpher44]

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You guys would know better than me, since I know nothing about this project. But sloppy or loose curtains being blown around in the wind with a leather on top of a fur curtain would surely build a charge. Besides this thread what other places should I look for info about this?

Just search for Triboelectric in these renewable threads ... or via Google.

I was searching Google's patent data base for Triboelectric Capacitors and found some interesting stuff.
Patent 8004250 -- pyramid capacitor with coil @ apex - aug 2011
Patent 6974110 -- pyramid capacitor with coil @ apex - dec 2005
Patent 3013201 -- self excited variable capacitor/gen - dec 1961
Patent 4126822 -- electrostatic generator/motor - nov 1978

This last one is interesting in that you have TWO capacitors
that share a common plate -- like the Hendershot capacitor --
but this patent is small with liquid mercury moving back and forth
over smaller plates to create an AC current from that movement.

Meanwhile, the hand-made capacitor that I recently made was
tried with a transistor oscillator ... and interestingly, its pretty
stable, until you pick it up and squeeze it. When you do,
the capacitance changes to be "bigger" as plates get a little
closer together, and the oscillating frequency therefore, goes lower.
So in terms of being an ingredient for parametric oscillation,
if we had a means of SQUEEZING such a capacitor -- say with
a magnetic field -- then we could alter the capacitance and
produce AC currents.

So this idea presents itself.
Suppose you wrapped a hand-made capacitor around a metal
cylinder. Suppose beyond this is a coil. As the coil produces a field,
the diamagnetic aluminum plates will attract or repel coil
depending upon charge, yet the metal cylinder will spread
larger in diameter due to attraction. Oscillations will move
that cylinder so that it is altering from circular to slightly oval,
to circular, to slightly oval the other orientation, and so forth.
These subtle vibrations can alter the capacitance too.
So I would think we would NOT want to lock all these things down
physically, but rather we would want the capacitor to vibrate on the
cylinder. The mechanical oscillations need to be pretty slow,
and there are certain frequencies that will be "resonant"
with the physical structure of the cylinder -- in terms of making
it shake most severely.

Foam picnic plates are pretty strongly triboelectric.
Putting all this vibrating stuff on those plates might be interesting.

This guy's video is interesting .. when he shows how charging it
once was all that was needed ... and then it self charges from
then on ... the charge flow being established...
"Do Try This @ Home 2010" - Episode 27 - "Lightning in Your Hand" - YouTube

[Ruphus]

You guys would know better than me, since I know nothing about this project. But sloppy or loose curtains being blown around in the wind with a leather on top of a fur curtain would surely build a charge. Besides this thread what other places should I look for info about this?

[morpher44]

goat hair

Why have I never heard of the Hendershot?!
I'm sure you have thought of this, but goat hair, aka cashmere, does not conduct static electricity very well if at all.
I have a lot of reading to do on here.
Best of luck to all.

I didn't know goat hair was anti-static. But ... I read up quickly on it and there is a warning in that it works best when in a moist environment. When dry ... all bets are off. So in a desert, goat hair may act differently than in a humid climate.

Cat hair ... human hair .. these are really good triboelectric materials with
positive charges .. or leather... rabbits fur...

In fact, I think Schrödinger's cat probably is alive since it would rub its fir
against the steel and prevent the radio active decay from releasing the small flask of hydrocyanic acid. Nine lives indeed.

[Ruphus]

Why have I never heard of the Hendershot?!

I'm sure you have thought of this, but goat hair, aka cashmere, does not conduct static electricity very well if at all.

I have a lot of reading to do on here.

Best of luck to all.

[drak]

Nice build drak. You are obviously more talented than me.

Thanks, but I doubt that.

Last week for fun ??? I made another hand-mad capacitor.
It a lot of bending over and getting up again .. tough on people over
40 -- unless your in good shape. I was in a swet trying to do it.

If you have an 8 foot piece of plywood, it makes it 1000% easier.

Scotch-tape. Hmm..... It was mentioned as something you
DON'T want in the hand-made capacitor for fear that it provides
a PATH for the AC currents. So if you had tape that touch one file,
then touched paper, then touched another foil, think of the TAPE
as a short. Double-sided tape might be OK if you have it ONLY
between the foil and paper....

Scotch-tape is there on the triboelectric material list.
You can do the following with this tape. Tape it to itself so that
non sticky surfaces appear on both sides. Walk over to your
bathroom mirror and rub the tape against the glass a few times
and let go. Watch it stick due to the charges....

Ooops. I didn't know. I can take them apart and remove the scotch. Wouldn't be that hard.

[morpher44]

capacitor discussion...

I was having trouble with the connection to the foil on the hand made capacitors so I used a piece of metal I got at Lowes. I cut it into a small strip, soldered a wire on the end of it, bent it in half, and used a vice to clamp it on the foil. It made a very good stable connection

Nice build drak. You are obviously more talented than me.

Last week for fun ??? I made another hand-mad capacitor.
It a lot of bending over and getting up again .. tough on people over
40 -- unless your in good shape. I was in a swet trying to do it.

My calculations were incorrect and my capacitance came out to be
36nF, not 7.8nf. I was reading how its not so important that you
get exactly 7.8nf ... but instead that you get BOTH capacitors
within 1% of each other. There was some hand-written paper of
Hendershot's with 1.3MFD on it. So your hand-made caps
can possibly be anywhere between 7.8nF and 1.3uF. Tuning-wise,
this is between 50khz and 59khz ...on the tank circuit.
I recall thinking about this frequency ... and what it might be used
for is that when the circuit goes into a rapid 50-59khz damped
oscillation, the solenoids near the magnets may essentially
NULLIFY the magnet's field for a time until the damped oscillation
gets all weak -- at which point the magnet WINS again.
Just a guess.
In messing around with these types of circuits, surely the oscillation
will be DAMPED quickly and the other frequency of interest
are the periodic -- SLOW -- pulses from the buzzer.

Nice idea regarding connecting the capacitor leads.
Yeah you don't want COPPER touching ALUMINUM.
Your capacitor leads can be steel wire, and you can sort of
roll foil around them tightly.

Scotch-tape. Hmm..... It was mentioned as something you
DON'T want in the hand-made capacitor for fear that it provides
a PATH for the AC currents. So if you had tape that touch one file,
then touched paper, then touched another foil, think of the TAPE
as a short. Double-sided tape might be OK if you have it ONLY
between the foil and paper....

Scotch-tape is there on the triboelectric material list.
You can do the following with this tape. Tape it to itself so that
non sticky surfaces appear on both sides. Walk over to your
bathroom mirror and rub the tape against the glass a few times
and let go. Watch it stick due to the charges....

Actually using shipping tape between foils plates might be a pretty
good dielectric material.

I think its interesting to make a SLOPPY capacitor with
TRIBOELECTRIC materials. SLOPPY in the sense that it is sensitive
to vibration ... and creates charges for you as it vibrates.
I hooked my attempt up to a oscillator circuit and its interesting
because you can here AUDIO tones from it.

[drak]

I was having trouble with the connection to the foil on the hand made capacitors so I used a piece of metal I got at Lowes. I cut it into a small strip, soldered a wire on the end of it, bent it in half, and used a vice to clamp it on the foil. It made a very good stable connection.


Very close to the 7.8 that I can use my hand to squeeze the foil together to get 7.8


Finally got my horse shoe magnets.

Hopefully I will be able to play soon.

For the rest of the build pictures you can go here.

[morpher44]

Aho Quote

"A firm squeeze again started the output and you may be assured that
it was a thrill to hold this pulsing condenser. It was a feeling of holding
the pulse of the living universe manifesting itself in a machine, even as
in a living body." - ARTHUR C. AHO, 1968

In thinking about this statement, the hand-made capacitor
(condenser) is vibrating. For it to be vibrating, you need some
pretty good voltage oscillations going on. As it vibrates,
you have "paper" and you have "aluminum" rubbing against each other.
Hence, this hand-made capacitor can exhibit triboelectric effects
if it is mechanically vibrating. The charges would BUILD in the capacitor,
and then provide power to the tank circuit, keep a high 50 to 60khz
oscillation going in the cylinder & coil area.
So "hand-made", as opposed to using some SOLID off-the-shelf
capacitor is probably necessary ... again another argument against
buying these 500uf or 1000uf caps shown in the recent HOAX video.

[morpher44]

triboelectric "friction" & "seperator"

Traditional Van De Graff generators use a motor -- powered by
electricity -- to spin magnets (or a coil), thus spinning a shaft --
and then brushing trioelectric materials against each other to create
friction, so that charges can then be extracted and sent to a capacitor.

Yet if "friction" of these materials is wanted, there are probably other
mechanical ways to create friction using magnets and small amounts
of electricity.

I was looking again at some of the pictures of the Hendershot Fuelless
Generator, and one stand-out feature is that the horseshoe magnet
is so strange, with 3-POLES. OR ... is it 3 Poles? You can't really
have a 3-POLE horseshoe magnet can you. A quick search via google
images turns up ZERO 3-pole horseshoe magnets. Nada! Zip!

So, one thought here is that Hendershot may have installed
a 3RD central "member" between the two poles, and extended it
slightly longer then the poles so that the "bar" can essentially
SEESAW over this object.
There would be "friction" indeed. But "friction" isn't necessarily
bad if you can harvest the charges into a nearby capacitor.
The mining industry uses this for a machine called a
"triboelectric sepeartor":

For iron ore, gold Triboelectric Separator,Triboelectric Separator supply

This is possible to do with "spinning" machine ... but also
just machines that are "friction" machines.

So one possibility here is ...
can you create lots of friction using very low power?

Can a magnet be brought into oscillation and "rub"
triboelectric materials -- in order to charge a capacitor?

[morpher44]

Triboelectric Series and Hendershot

I watched a very nice video on a DIY Van de Graaf Generator.
This: How to Make/Build a Van de Graaff Generator Part 1 (Homemade/DIY) - YouTube
Some thoughts with respect to the Hendershot Fuelless Generator
having some Van de Graaff capabilities:

Negative Charges
The following materials would be on the negative side of the
triboelectric series and used by Hendershot:
* wood
* {possibly steel wire, or steel in cylinder -- coffee cans in the early days}
* sealing wax
* copper {in the wires}
Certainly there are other materials that can provide negative...

The following materials would be on the positive side of the
triboelectric series:

* human hands
* aluminum
* paper {e.g. kraft paper in hand-made capacitor}

from:
http://esdsystems.descoindustries.co...les/Image2.gif

In a Van De Graff generator, you have a means of moving charges
into a spherical capacitor -- into the INSIDE of it specifically.

Interesting that the Hendershot device appears to have a mix
of these charge carriers. Oscillating magnetic fields can move
charges as well, and they will travel around the fields in
curving spirals, landing on what ever target surface you
can present, per the magnetism.
An alternating field would move the charges BETWEEN
two structures -- the POLE and ANTI-POLE, and then the other
way round.

With the tank-circuit around the hand-made capacitor, we have a
"tuned" frequency of 50khz to 60khz ... Some place in that range
according to the capacitance and inductance value for the tank.
This is slightly beyond human "hearing", but would be sensed as
a sort of "pressure", if you were in the presence of such sound.

So yes, "wood", and other materials all can contribute in terms of
charges.

[Spokane1]

Art Aho Phamplet

This it?
http://www.keelynet.com/energy/hender1.txt

That's the one. Looks like someone took some time to type in that 30 page document. It must have been before the days of scanners.

It looks like you are already covered for this source of comment on this technology.

The only other reference I have is an old book on the "Piezo Electrical Effects of Wood". I once thought that the 51 (or 53) wooden dowles that supported the basket weave coils might have had some impact on the technology's operation. I never followed up on this line of speculation and it is a long shot anyway, but the concept was interesting. Other than the Tesla table Top Oscillators no other Over Unity device that I know of uses wood in any meaningful way.

Mark McKay

[morpher44]

"a Case For Space"

This it?
http://www.keelynet.com/energy/hender1.txt

[Spokane1]

Art Aho Phamplet

Hi Mark,
What is the title of the pamphlet? With a title, we can easily google search for it and see if its on the web already so you don't have to waste your time if it is.
If its NOT on the web, by all means put it on the web. Don't send it just to me. The purpose of this forum is to share all material with everyone.
This page allows you to upload images (up to a certain limit of space).
You can host the paper some other place too. Don't violates anyone's
copyright.
I can find lots about Mr. Ahoe and Hendershot.... but maybe you have
something unique.
Give us the title.
-morpher44

Dear morpher44,

The title is: "A Case for Space" by Arthur C. Aho. Printed by South Antelope Valley Publishing Company, Littlerock, California 1968.

Only six pages are given to the Hendershot technology. The rest of the 30 pages contains several speculations on other exotic subjects.

The reason I suggested sending you this scan is that my data limit on this forum has long since been full, mostly onf E.V. Gray technology for photos and shcematics. Perhaps you have more room left in your account?

Mark McKay

[Gazzasore]

Just out of interest check out "shazizz" on YouTube He's gone Back ?!!