Re: Lighting incandescent lamps with TC

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gary Peterson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <glpeterson-at-tfcbooks-dot-com>

> [can't] . . . cause an incandescent lamp to
> glow from current coupled by induction, . . .
> Does anyone have any ideas
> as to what the problem is?

Follow Tesla's instructions and you should have better luck:

23 Q.  Can you describe any other forms of receiver which you used in
practicing this invention [the electronic AND logic gate] . . . ?

A.  Yes, sir . . . a coil wound around a cylinder of large diameter covered
on top with a board so that it resembled a table on which I often placed the
apparatus for receiving.  Within this coil was another coil, and the
terminals of both were led to the board so as to be readily accessible.  I
very frequently used this apparatus in the following way: I would pass
through the cable laid around the room two electrical oscillations of
different periods and would tune one of the coils mentioned to one of the
oscillations, and the other to the other oscillation.  I used frequently
condensers and inductances for this purpose. . . .  I had a great many other
apparata of this kind which I frequently employed in my demonstrations or
lectures with tuned circuits. . . for instance, a coil which was provided
with a handle to which one of its ends was attached, the other end being
connected to a loop of rather thick aluminum wire, which served as capacity
terminal.  On the lower end of the coil, near the handle, was wound another
coil of few turns of wire, to which I often connected a small condenser,
adjusting its capacity so that the coil was powerfully excited when a
certain vibration was passed through the cable around the room, the other
coil responding to another vibration, properly chosen, so that both
vibrations would not greatly interfere with each other.
>>> It was a common experiment with me to take a hoop of wire closed through
a minute lamp and light the latter by the conjoint action of the two coils.
. . . <<<

24 Q.  Please describe the details of the construction of this hoop and
lamp, and the manner in which the lamp was operated by the conjoint effect
of the two oscillations.

A.  . . . I think the coil, which was wound on the outer side of the frame
of cardboard, about 30 inches in diameter and 5 inches wide, had something
like 300 turns of wire, I should say No. 20.  One end of this wire was
connected, as I stated before, to a metallic handle, and the other to an
aluminum wire, fastened on the end of the frame opposite to the handle, so
as to form a circle, which, however, was not closed.  This aluminum wire,
constituting what I have called the capacity terminal, was bare, because
when the action was powerful I would get strong streamers from it.  On the
inner side of the cardboard frame were wound several turns of thicker wire,
and these were connected, in the experiment, to a small condenser which was
so proportioned that the period of oscillation of the circuit connected to
it was suitable for the test, and different from the period of the other
circuit which I have first mentioned.  The transmitting apparatus most
frequently used was already described in answer to question 15.  It
comprised two or more sets of condensers, which were charged from the
transformer giving a pressure of 50,000 volts and discharge, in most cases
alternately and in very rapid succession, through the cable around the room.
I would then take a loop of wire forming a circle, to which a device such as
a minute lamp requiring an extremely small amount of energy was connected,
and would approach the loop to the active system of the two circuits,
energized in extremely rapid succession from the cable around the room, and
the lamp would be lighted. . . .

88 x-Q.  Please state whether or not Figure 11
http://www.tfcbooks-dot-com/mall/more/images/fig-11.gif illustrates the lamp
receiver which you have already referred to in your testimony? If it does
not, please explain wherein it differs.

A.  No, sir, this lamp was lighted by the action of one single circuit,
which is below under the cloth The circuit which energized the loop held in
the hand of the experimenter was, I believe, covered with black cloth, so as
to get a better picture.  The photograph was, I think, also taken by Mr.
Alley.

>From NIKOLA TESLA: GUIDED WEAPONS & COMPUTER TECHNOLOGY.

Gary