Movement sensor

Details Movement sensor Movement sensor

1984-11-05

1987-08-18

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340566, 340689, 200 6145R, G08B 1314

Patent

active

046880259

ABSTRACT:
A movement sensor having a movable part, detection means for providing a first detection signal when the part is in one position and a second detection signal when the part is in a different position, and means for producing an alarm signal in response to the first and second detection signals being successively provided after initiation of the operation of the sensor irrespective of the order in which said signals are provided.

REFERENCES:
patent: 3742478 (1973-06-01), Johnson
patent: 3962696 (1976-06-01), Smith et al.
patent: 3999178 (1976-12-01), Hamilton
patent: 4196429 (1980-04-01), Davis
patent: 4484186 (1984-11-01), Wood et al.

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