Hendershot Replications

[thx1138]

During the half cycle the current is blocked, when there is a capacitor in line - the cap will charge from the High frequency resonant coils - as it would if you were using a diode. When the other side is depleted the current stops flowing allowing the freshly charged cap to flow through the transformer and reverse biasing the opposite side allowing the other cap to charge.

Basically what you have is a mag amp being biased on both coils. Similar to a diode with a transistor to release the energy at the appropriate time... by using the transformer you actually get a bit of a boost as the change occurs.

I wrote up the Hendershot Generator as a Magnetic Amplifier and the quote above cleared up some things for me. File attached. I'm still not clear on the role of the top and middle basket weave coils unless they are somehow acting as chokes but I just don't see that in the schematic.

Time to build.

[dragon]

Nice analysis thx - nicely presented ! Now prove it right or wrong . The mag amps - before they were mag amps - provided useful alternatives for things that weren't around in the day - Amplifiers, regulators, relay alternatives and lots of other things.

Morpher: I admire your work on the hendershot - it would be nice to have seen some of his beginning projects that led him to his final builds - a path to follow of sorts. It became an obsession that I had to get away from... but I find myself utilizing the knowledge in many other projects.

Take note of his toy airplane motor - specifically the collector... you'll notice it appears to be a magnet with iron plates on each side - on the end a propeller, fan or other mechanism that might toggle easily in the wind. I believe this was a means to short/distort/alter the magnetic flux at the oscillator core. A generator. When there is a high frequency voltage flowing through an iron cored coil arrangement ( such as his honeycomb coil) it doesn't show up as useable energy... when you move a magnet or iron bar in front of the core both energies become useable by slowing it down...

Back to other projects ....

[thx1138]

More on the transformers

I believe the transformers act as a magnetically controlled bi-directional diode. When current flows through one side the other side can only pass current in one direction which allows the caps to charge. Once the current slows from that direction the other side becomes active creating a directional flow opposite to the first thus charging the opposite caps.

Very similar to the magnetic amplifiers, we are "gating" the directional flow like a transistor but with the ability to reverse directions.

I think you nailed this one. While I'm waiting on parts I found more info on the "Vertical Oscillator Type" transformers. They have an air gap between the E and I laminations.

[thx1138]

Found another part missing from the schematics.

Well, most of them anyway.

[thx1138]

Basket weave coil winding direction

All the parts are in and I've done most everything but assembly. Is there anything definitive on the direction of winding the top, middle, and bottom coils as well as the capcoil coil on the outside of the bottom coil? Are all coils on a single capcoil wound in the same direction?

Are both capcoils wound in the same direction or opposite directions?

For example, if I have my roll of wire sitting in the center of the pegs with the loose end sticking out between the pegs nearest me, do I bend the wire to the left or right to go around the next peg?

I've looked at pictures, forum posts, and videos until I'm sick of it and haven't found anything definitive. I've seen it done both ways in videos.

Any one have an opinion and, if so, what is that opinion based upon?

I'm continuing with other work on it in the mean time.

[dragon]

It's probably not wise to replicate someone else's failures as you will end up where they did - including my attempt.

It seems the only component's that crossed over to from paper to paper was the basket coils and transformers - everything else has been altered and rearranged as a best idea or guess.

I wound the basket coils all the same direction, both identical - right or wrong, that was my choice at the time. The wire connections can be reversed for further exploration.

[David G Dawson]

Basketweave

Thx1128, dragon,
My apologies for not responding earlier.
Thankyou for your dialogue so far as it is most helpful to see some logical variation in thought.
We went into the wind direction and believe it to be stated somewhere but fails me exactly as to where at this time.
I wound mine, standing in front, by going to the right, around the rear and back in on the left and this is the same on all winds including the last L4 over L3.
I have detail on the inductance and resistance for each of the winds.
When you get to winding your capacitor would suggest using tin plated steel out of an old can as I think this is what Lester used as he complained about it rusting and that is exactly what tin on steel does.
I used Aluminium but only tape joined where the tin could be solidly soldered to make a circle for the former but may help to paint with a thin Estapol just to stop the rust.
This is my next planned modification when I can manage the time.
Have shots here of a capacitor build including the caps used which turned out to be very close to Lester's dimensions give or take just a few mms.
Including the capacitance at 6,800 pf and can manage that figure using paddlepop sticks as pressure tuners so that both basketweaves read the same value.
People seem to stop here in their builds but is another developed skill and fun to do.





Cable used is silicon speaker cable (Studio Acoustics 16 gauge SA1630) as this fitted best around the wooden dowels - the 14 was too large.
A dream to wind and you can retain the line without twisting.

Am busy with Steven Mark's TPU in two versions, his expansive and my contractive but driving with Vacuum Tubes.
Have displayed progress at the Energetic Eric Dollard Forum but somewhat dismayed by the lack of interest.

http://www.energeticforum.com/eric-d...ollard-68.html

Will attempt to follow your progress and advise if I may be able to assist in anyway.
Good luck with your build.

Smokey

[morpher44]

re: turn direction

Yes the turn direction.
I have given this a lot of thought, and here is what I came up with.

Watching Stan Deyo's youtube lectures, he comes to a discussion about how UFOs fly in a "supportive" configuration where all of them SPIN in the same direction in formation. This creates a stable flying configuration. Similarly, I have seen a youtube video where this guy set up about 50 or more magnetic tops on jars, all spinning in the same direction. They appeared to spin perpetually, each top supporting its neighbor top, and so on.

Now if we think about the fields created by the Hendershot coils, they are going to oscillate with an AC current, each cylinder having a toroid-shaped magnetic lines of force around the cylinder. Those magnetic lines will spin clock-wise around the cylinder, and then counter-clock-wise.

Hendershot didn't appear to use Diodes, NOR pulsed DC, so I think we can rule out that the cylinders had an air gap. So unlike Stan Deyo's wedding cake coil notion, with pulsed DC to produce a SPIN to a cylinder-washer with an air gap (Lorentz-O), I would think Hendershot's coil is instead a classic transformer, using the coffee-can as the core.

So we have to visualize what these spinning magnetic toroids would BEST do when next to each other. There is mutual inductance to consider.
Do we want it to be supportive, or "bucking"?

I had also consider that 2 is an "unstable" geometry, and 3 coils might have been better if "supportive" mutual spin is wanted. Yet I recall reading someone making the case that the horseshoe magnet-bar-solenoid arrangement is the 3rd cylinder -- essentially.
These would all need to be placed onto the flat surface so that they are equidistant, forming a equilateral triangle.

I have some "crude" experiments that have shown to me that the horseshoe magnet-bar-soilenoid device will BEND the fields of the horseshoe magnet LEFT and then RIGHT, and back again at the two cylinders. By doing so, you can exploit a MAGNETIC field that was already there from the magnet "FOR FREE", but move it using very little energy. It extends out quite far if your magnet is strong, but takes very little energy to CUT via the solenoids and bar. Or another way to think of this is that the solenoids, when activated, will ENHANCE one pole, and DEGRADE the other pole of the magnet. Thus most of the field lines are going to only ONE side. The BAR further bends the filed to the LEFT or RIGHT.

This creates a situation where the coils don't have to move, and the magnet doesn't have to move, but the magnetic field DOES move.
You need something to be moving to create the "generating" effect.
It seems counter intuitive that nothing is physically is moving here, but there is the magnetic field from the magnet, unseen by the human eye, that is made to move in the presence of the two "pick up" coils.

Another way to imagine this is the following.
Suppose you had two wheels mounted horizontally on two polls.
Now imagine you face them and with a hand on each wheel,
you make them both start spinning clock-wise (as viewed from the top).
Now, you grab them to stop them, and then make them spin counter-clock-wise together. You stop them again, and go clock-wise again.

This would probably be EASIER to do to stop both wheels, and then attempt to get them to spin in opposite directions, only to stop them, and then switch each of their directions, and so forth. There is a gyroscopic effect to consider. Two spinning wheels going opposite directions will degrade the movement of each wheel faster.

So using this thought experiment, and trusting it,
I would think it makes more sense to have each coil in the Hendershot device, create SPIN in the same direction, when the same signal is applied, so as to be supportive configuration.

It is a shame that such details of wiring direction appear to be lost with respect to this invention.
The wiring direction may be important for the solenoids facing the horseshoe magnet too.
Hendershot was not afraid of unwiring some previously wired device,
such as solenoids from an old telphone, and then re-winding everything
himself.
I do think, though, that the basic idea with the solenoids is to simply
have ONE pole of the magnet enhanced by one pole of the solenoid, and the other pole of the magnet degraded, and then to switch polarity, and so on, to move, with subtle power, a LARGER magnetic field from the magnet.

[morpher44]

Earth's Dynamo

The dynamo theory for the Earth suggests that the inner core of our planet is producing a very large magnetic field that extends out and protects the Earth from solar radiation, etc.

Wikipedia states that "the equations for the geodynamo are enormously difficult to solve...For decades, theorists were confined to kinematic dynamo models... fluid motion chosen in advance...trying different flow geometries and seeing whether they could sustain a dynamo."

Now suppose you could make a device that could tap just a small "portion" of the Earth's dynamo. There is a HUGE fluid moving from the planet. The field itself it measured in microTeslas, however. This is a tiny, insignificant field, yet strong enough to move a compass. It does seem odd that something created by something as large as the Earth's core, would measure such a tiny field strength.

Suppose what is important, for generation, is not the "local" field strength, per se, but some means of exploiting the fluid motion.

Another thought experiment. Tesla has a patent for a fountain. A small little motor at the bottom of the fountain, using low-power, can spin up a vortex in a column of water. As the vortex grows in strength, the water level rises and spills over the edge of the fountain. The water falls down into basin, where it can find its way back to the column. The fountain appears to be conveying lots of energy from the falling water. Gravity has contributed to this power. Tesla was able to PUSH water up by shaping it into a vortex, with a anti-vortex of air in the center.

Imagine how you would design such a fountain using electro-magnetism as your "fluid", and the Earth's magnetic fields as your "gravity".

Might it not be possible to influence the "fluid" you set up in motion with low power, using the Earth's field?
No laws of physics need be violated here. We just need to set up
the right circumstances, the right geometry, and have a good understanding of EM fluid dynamics.
We need "models" of how the Earth's dynamo can influence
"human-sized" machines.

[morpher44]

toroidal magnetic field repels particles

Charged particle trajectories in the presence of a toroidal magnetic field on a Schwarzschild background

Abstract:
"Trajectories of a single charged particle in the presence of toroidal magnetic fields superposed on the Schwarzschild background geometry have been obtained, and it is shown that the toroidal field repels the particles and in particular the incoming ones get ejected in jet-like trajectories".

---

So, here is a thought.
Suppose you have a cylinder shaped coil producing a toroidal magnetic field around the cylinder.
Suppose also, that the particles are not repeled, but actually are sucked in, take a TRIP around the toroid, spiraling around the field lines, only to be repelled later based on their initial trajectory in, and their finding an "escape" at some weak point in the field.

Now, let us also suppose we had a "plate" capacitor in the form of a cylinder INSIDE the cylinder coil, providing yet another "escape" for the incoming particles. The particles might find the capacitor is the path of least resistance to escape the magnetic field line.

Might it not make sense, therefore, to have a cylinder capacitor INSIDE your cylinder coil to "harvest" the charges of incoming particles?

One problem with Tesla's large rectangular metal plate for receiving radiant energy, is that it has to be physically big.
What if, you could instead, set up a spinning toroidal magnetic field, with essentially a vortex shaped glide-path for incoming particles?
They will spiral down, in a vortex pattern, into the toroid, and then out the other side -- unless "caught" by the inner capacitor.

[thx1138]

I had also consider that 2 is an "unstable" geometry, and 3 coils might have been better if "supportive" mutual spin is wanted. Yet I recall reading someone making the case that the horseshoe magnet-bar-solenoid arrangement is the 3rd cylinder -- essentially.
These would all need to be placed onto the flat surface so that they are equidistant, forming a equilateral triangle.

The image is from "From the Archives of Lester J. Hendershot" by Mark Hendershot. It's the only photo I know of that shows a working Hendershot generator. No equilateral triangle there. Also note the light bulb and capacitors are between the magnet and the capcoils. The proximity of the armature to the magnet pretty much guarantees the armature will absorb all of the magnet's field. If any of the magnetic field were to "leak" from this arrangement of the magnet poles and the armature, it would be directed away from the cap coils.

[dragon]

What if it's much simpler.... what was the single event that led to the constructions of the capcoils - transformers etc....? It's constructed to enhance, store and recycle.

All the information I've found seems to set the focus on the basket coils, special cap formation and transformers which in reality would lead you away from the origin.... show the "eye candy" to deviate from the truth.

The only portion that isn't well explained is the buzzer coils.... the heart of the system. Even his toy plane motor was built around the simple 3 coil oscillator - everything else was added to enhance, store and recycle the energy.

The thing that rang out for me was " coils that only Hendershot knew how to rig" , "the 40 turns added to the ringer coils", the comment that they wouldn't/couldn't work because they are shorted, and the connections to the cores of the ringer coils.

All else aside, it started from a single simple discovery that he built upon...

[thx1138]

What if it's much simpler.... what was the single event that led to the constructions of the capcoils - transformers etc....? It's constructed to enhance, store and recycle.

I think that's true. The more I look at it, the simpler it gets. Construction is coming along but the question of the coil winding directions made me back up and look at it again. And what I saw this time around that was staring me in the face is that there are 4 transformers, 2 or either side. The vertical oscillator type transformers and the bottom basket weave coil/capcoil coil.

The vot transformer connections as stated in the notes show opposite phase connections to the middle coils - green to middle coil top on one side and green to middle coil bottom on the other side and in both cases the opposite end of the middle coil goes to the 40uF capacitor of its respective side.

I'm still not clear on what the top and middle coils do. I guess that depends on the capcoil core. Originally a coffee can, later aluminum or stainless steel ("From the Archives of Lester J. Hendershot" by Mark Hendershot). The coffee can would have had a magnetic effect, the aluminum not magnetic, and the type of stainless steel wasn't specified so it could have been magnetic or not. I'm beginning to think that the material wasn't that important but that it was the size needed to get the capcoil capacitor materials near to the basket weave coils.

Considering that the capcoil cap and capcoil coil form a self oscillating LRC circuit and they are inductively coupled to the bottom basket weave coils and the tops of the bottom basket weave coils are connected together through the commons of the 80/40 capacitors I suspect that at least those capcoil coils should be wound opposite of each other to get the phasing correct so the energies enhance rather than cancel.

The transformer work in this circuit is new to me so I'm not yet clear on the phasing issues. Any links to good references on transformer phasing would be appreciated.

The only portion that isn't well explained is the buzzer coils.... the heart of the system.

That seems pretty straight forward to me. Remember that the armature only has one magnetic polarity because the ends of the radar magnetron magnet are the same polarity with the recessed center pole being the opposite polarity. The ringer coils are wound and connected so that as the current passes one way through the windings the coil core ends facing the magnet armature have opposite polarities. The opposite ends of the cores are connected with a magnetic material to reinforce that magnetic polarity of the cores. That's the same way it works in an old phone ringer to get the bell clapper to move from side to side to hit the bells on either side. It literally oscillates a moveable armature to which the clapper is attached. So one side of the armature is attracted to one ringer coil core and repulsed by the other core. When the current reverses through the coils due to the oscillation set up by the capcoils, the polarity of the buzzer core coils reverses and the opposite sides of the armature are attracted/repulsed. In each half of the cycle energy is added to the circuit when the attracted side's magnetic field gets stronger, thus enhancing the energy in the coil of the attracting pole and weakening its opposition in the opposite coil core since the armature is being repulsed and therefore the filed on that side weakened.

Scroll down the following link's page to figures 6 and 7. It's very similar. They are purposefully reversing the polarity through the coils to perform a mechanical selection function. In our case that mechanical function is to oscillate the armature by continuously reversing the current through the coils so the magnet feeds energy into the system as described above. Keep in mind that we are calling it a "buzzer" because it was said to make a buzzing sound. So it seems it would be relatively low frequency physical movement of the armature that would make this sound.
Antique Telephone History Website

The buzzer can be looked at as a transformer also but where only one side is electrical. Rather than feeding electricity into the primary to create a magnetic field to be coupled to the secondary, the magnetic field of the magnet is used as the primary. As such, the air gap between the ringer coil cores and the armature can be looked at in the same manner as the gap in the vertical oscillator transformer E & I laminations.

[dragon]

I would, respectfully, disagree with the notion that the buzzer coils are wired like a standard bell ringer.

Note the torn paper cover on the coils, Also note the connections to the cores of the coils.

These are not standard "off the shelf" ringer coils - they have been modified to react like the original 3 coil oscillator.

[thx1138]

I would, respectfully, disagree with the notion that the buzzer coils are wired like a standard bell ringer.

Note the torn paper cover on the coils, Also note the connections to the cores of the coils.

These are not standard "off the shelf" ringer coils - they have been modified to react like the original 3 coil oscillator.

You might be right about the electrical connections to the cores but I don't think that photo supports the idea.

There are dark areas between the electrical connection tabs and the coil cores on both sides - the red arrows in the attachment. The shiny object on the left coil core pointed to by the yellow arrow appears to me to be a drop of solder that fell down to the core when the connection was soldered. But there is no shiny solder on either the left or right cores connecting the electrical tabs to the cores. It seems to me if they were being electrically connected there would be either a wire or a large solder bridge making that connection.

If you look at the view of those coils shot from the other end you'll also see what appears to be a piece of metal across the ends of the cores (outlined in read in the attachment). That makes sense magnetically but if the cores were electrically connected that would be a direct connection and the electrical current, taking the path of least resistance, wouldn't go through the windings. The coils I acquired have internal threads for mounting in the cores on the ends with the electrical tabs. I'm guessing that piece of metal is drilled behind the cores and has screws into the cores to hold them in place.

I think I have the phasing worked out. Time to proceed with the build. I guess I could try the electrical connection to the cores when I get it built. Did you try it in your build?