Re: more newbie questions

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

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

 > Why did Tesla make a coil in the first place? . . . is there any
pracitical purpose?

He built them as electrical power supplies for studying high-frequency
phenomena.  He also constructed high-frequency alternators for the same
purpose.  Applications include use as power supplies for high frequency
lighting and working X-ray tubes, charged-particle acceleration, ozone
generation (U.S. Pat. #568,177), production of nitrogen oxides, power
transmission, and wireless telegraphy and telephony.  Tesla used the New
York oscillator for the first electronic implimentation of the AND logic
function in his Houston St. lab.

The resulting U.S. Patents # 723,188 & # 725,605 for wireless signaling
cover logic gates in general and also describe the basic principles of
frequency-hopping and frequency-division multiplexing in wireless spread
spectrum telecommunications.  See www.tfcbooks-dot-com/tesla/control.htm for an
exhibit in the U.S. patent interference "Nikola Tesla vs. Reginald A.
Fessenden, Interference No. 21,701, Systems of Signaling" showing a circuit
diagram of an electronic AND logic gate used by Tesla in 1899.

Gary
www.tfcbooks-dot-com