The Turn Of The Century Electrotherapy Museum

Reproduction Kinraide Induction Coil - Full Size

Reproduction High Frequency Induction Coil using concepts patents by Thomas Burton Kinraide in 1897

Complete unit, runs from 110V, less than 2A input power.

Unit has 3 primary windings of copper ribbon to allow minute variations of electrical discharges from both poles of the coil.
Micrometer spark gap is adjustable in 1/1000th of an inch increments.   The smaller centre-punched holes represent increments
of 1/10,000th of an inch.

Secondary coil has 2000 turns of 34 AWG wire.  A capacity of .05 mfd is used.

Sparks are better than smoke...

Discharge is adjustable from 6 - 8".  The discharge length can be increased, but sparks tend to form on the insulating tube!

View with the lights off.

3 turns of each outer primary coil are used for this photo.

(C) Jeff Behary, 2010