Nathan Stubblefield Earth battery/Self Generating Induction Coil Replications

[Localjoe]

@all

Cheers,
          very nice to come back and see so much thoughtfull thingking about switchign devices. Hopefully i can use my stimulus check to buy some wire and assorted goodies to get my big model on the road. 
                                                                                                                                                            Joe

[storre]

My feeling on the switching, considering the materials they had at the time, is that he used a simple switch that is opened when the bolt becomes magnetic for the brief second when they were closed by a spring. So when the bolt is magnetic the circuit is opened and the bolt is not magnetic and the spring takes over and closes the circuit and I suppose it would go at a speed relative to the length of the primary winding. The longer the primary winding the slower the pumping?? Also I recall dr. timothy talking about a capacitor in there somewhere. Maybe it was also involved in regulating the pulse timing?

Soon I will duplicate the NS battery as close to the patent as possible and put a normally closed reed switch between one of the copper and one of the iron leads and try to get the distance to the bolt right so as to create this pumping.

[electricme]

@ storre
Hello and welcome to the group.

What you say is right about the working of the magnetic principle on the iron core,  I know that we are playing with very small currents and voltages, it is very difficult to setup a relay coil to match them.

                                    I suppose it would go at a speed relative to the length of the primary winding.

This again is variable, it would also be affected by the springness of the armature, the type of very fine adjustment if fittered, to allow one to fine tune. The "gap" distance between the armature contacts at rest & closed.

On one hand, it is very easy to make a relay work on 12v dc powered by a car battery, but on the other, quite difficult to do the same with the voltage & currents from a Stubblefield Cell.

I have a number of PCB mounted "miniture" relays, I might muck about with them a bit today and see if I can get one to thro at a voltage lower than 1/2 volt.

@ bill
I havent got back to my instrument making yet, will have to sort that out later also

Jim
   

[electricme]

@ all
I stumbled onto a site that is involved with VLF, they make reference to magnetic fields, etc they have made circuits to detect them, anyhow, I think it is worth a look and see if we can use anything in our setups, could be nothing as well.

     http://www.techlib.com/electronics/VLFwhistle.htm

Theres a lot of other technical stuff in this site as well.   

Late today, I made up another lead going from another set of cu & Al pipes connected in series, the lead comes into the kitchen along with the previous setup.

Its getting too cold here now to go outside to measure (onset of winter), I'll do it in the comfort of the house.
(working smarter is brainer)

Jim

[nightlife]

I came across this following video and I thought that the circuitry may be of interest to some of you.

http://www.metacafe.com/watch/915226/free_electricity_from_thin_air/