Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1975-05-29
1976-08-31
Swann, III, Glen R.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340226, 340276, 340409, G08B 2900
Patent
active
039784770
ABSTRACT:
In a solid state security system having a plurality of alarm sensors for generating output signals in response to alarm conditions and a corresponding plurality of resettable latching circuits for developing digital output signals indicative of alarm conditions for processing by logic circuits to develop alarm output signals, an automatic test circuit responds to a single activating signal by sequentially supplying simulated alarm condition signals to the respective latching circuits to determine the operational integrity of the latching and logic circuits. At the conclusion of the test sequence the automatic test circuit transmits reset signals to the resettable latching circuits.
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Lynch M. P.
Swann III Glen R.
Westinghouse Electric Corporation
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