1982-04-05
1985-06-25
Griffin, Donald A.
354 81, G03B 1746, G03B 112
Patent
active
045250472
ABSTRACT:
A burglar and intruder detection system photographs burglars and other intruders by use of a mechanically trippable camera of the automatic advance type for sequentially taking successive pictures upon being repeatedly tripped. An electric motor drives a shaft having a cam. A lever arrangement is actuated by cam lobes to repeatedly trip the camera when the motor operates. Electric power for motor operation is provided by a switch mat or other switching device in response to detection of the presence of an intruder. A thread follower on the shaft establishes a predetermined time interval following the initiation of motor operation, operating a switching device for de-energizing the motor after the interval is timed out. An enclosure having a movable cover protects the camera and associated lighting. Solenoids control movement of the cover.
REFERENCES:
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patent: 2718628 (1955-09-01), Bartlett et al.
patent: 3141393 (1964-07-01), Platt
patent: 3752047 (1973-08-01), Gordon et al.
patent: 4180316 (1979-12-01), Della-Calce
patent: 4383744 (1983-05-01), O'Connell
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