High voltage AC control driving low voltage device timed by coul

Details High voltage AC control driving low voltage device timed by coul High voltage AC control driving low voltage device timed by coul

1976-02-13

1976-12-21

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

324182, 3403091, H03K 326

Patent

active

039990885

ABSTRACT:
A high voltage AC system for driving a low voltage device including a high voltage rectifier and a comparator for comparing the rectified signal with a predetermined voltage value for producing low voltage pulses. A coulometric timing circuit is coupled to the rectifier for providing current flow between the cathode and the filament of the coulometric cell for electrolytic erosion of the filament when high voltage is applied to the system. A transistor is adapted to drive the low voltage device in response to the low voltage pulses. The coulometric cell is coupled to the amplifier pair for preventing the amplifier from driving the low voltage device until the filament opens.

REFERENCES:
patent: 3355731 (1967-11-01), Jones, Jr.
patent: 3405274 (1968-10-01), Lakin
patent: 3938128 (1976-02-01), Pidsosny et al.

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