Communications: electrical – Systems – Signal box type
Patent
1975-06-17
1976-10-12
Swann III, Glen R.
Communications: electrical
Systems
Signal box type
340287, G08B 2900, G08B 2500
Patent
active
039861848
ABSTRACT:
A plurality of finger operated button switches are employed in conjunction with a logic circuit to control the mechanical activation of a conventional alarm box mechanism. When the finger button switches are pressed to activate the alarm, the user's fingerprints are retained on the switch buttons. Upon actuation of the alarm, the fingerprint bearing button switches are retracted to a position in which they are inaccessible to the alarm user. An electrical "flesh" sensor is provided on at least one finger button to prevent actuation of the alarm by means other than a human finger. In the event of a power failure, the conventional alarm mechanism can be actuated by mechanical pressure on a thumb button switch. In the preferred embodiment, the finger actuated button switches are located within a housing that can be retrofitted to existing alarms such as, fire alarm telegraph boxes.
REFERENCES:
patent: 1861243 (1932-05-01), Rothman et al.
patent: 2301989 (1942-11-01), Zamborsky
patent: 3325800 (1967-06-01), Messick
patent: 3639905 (1972-02-01), Yaida et al.
patent: 3877005 (1975-04-01), Apgar
patent: 3885236 (1975-05-01), McNair et al.
patent: 3886537 (1975-05-01), Mann et al.
Castanino Joseph J.
Lotus John W.
Meade Alfred J.
Birch Richard J.
False Alarm Deterrent Corporation
Swann III Glen R.
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