Trigger circuit

Details Trigger circuit Trigger circuit

1998-10-01

2000-02-22

Hofsass, Jeffrey A.

Communications: electrical

Condition responsive indicating system

Specific condition

340556, 250214B, 250221, G08B 1318, G06M 700

Patent

active

060285168

ABSTRACT:
A trigger circuit including a light source supplying a first beam of light having a first frequency, a frequency altering device positionable to receive the first beam of light. The frequency altering device receiving the first beam of light and transmitting a second beam of light having a second frequency. A frequency sensitive component operable in response to the second beam of light having the second frequency, the frequency sensitive component being positioned to receive the second beam of light and provide a trigger signal. A trigger coupled to receive the trigger signal and, upon receipt of the trigger signal, triggering the system. A light filter can be included to transmit the light of the second frequency.

REFERENCES:
patent: 4871054 (1989-10-01), Murray
patent: 4879461 (1989-11-01), Philipp
patent: 5126555 (1992-06-01), Hawryluk
patent: 5139384 (1992-08-01), Tuttobene
patent: 5268568 (1993-12-01), Lee
patent: 5382163 (1995-01-01), Putnam
patent: 5415264 (1995-05-01), Menoud
patent: 5416316 (1995-05-01), Kappeler
patent: 5780842 (1998-07-01), Murphey
patent: 5790303 (1998-08-01), Weston et al.
patent: 5814799 (1998-09-01), Swartz et al.

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