WILLIAM HOLMES GIBSON
Pilots at Saint Matthews Cir, Covington, KY
License number
Kentucky A2642674
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
736 Saint Matthews Cir, Covington, KY 41015
Professional information
Variable Duty Cycle Lamp Circuit
US Patent:
4163923, Aug 7, 1979
Filed:
Mar 15, 1977
Appl. No.:
5/777728
Inventors:
Dennis M. Herbers - Hamilton OH
William H. Gibson - Covington KY
William H. Gibson - Covington KY
International Classification:
H05B 3702, H05B 3904
US Classification:
315208
Abstract:
The effect of a three way lamp bulb is achieved with a single filament bulb through the use of a variable duty cycle circuit and a touch control mounted in the base of the lamp. The circuit features a touch control incremented counter which controls the ramp rise rate of a sawtooth generator which is synchronized with the A. C. source. A trigger circuit accepts the sawtooth waveform to produce triac control pulses of time durations dependent upon the ramp rise rate.