Timed alarming

Details Timed alarming Timed alarming

G - Physics

08

B

340/102, 340/128

G08B 25/00 (2006.01) B60R 25/10 (2006.01) G08B 13/22 (2006.01)

Patent

CA 1106931

TIMED ALARMING ABSTRACT OF THE DISCLOSURE A triggered before disarmed alarm system especially useful in connection with an automobile alarm uses CMOS circuitry and appropriate supply filtering having one hex-inverter integrated circuit as the only active component beside the output transistor. Diodes couple a negative immediate trigger, positive and negative delayed triggers and a disarm potential to various ones of the six inverters to render the output transistor conductive and signify an alarm condition only when an alarm condition is signified by a sequence of inputs consistent with unauthorized entry.

305685

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