Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1981-11-24
1984-06-19
Trafton, David L.
Communications: electrical
Condition responsive indicating system
Specific condition
70333R, 70DIG49, 340671, E05B 4506
Patent
active
044555520
ABSTRACT:
A combination lock of the dial operated tumbler wheel type comprising lock mechanism components including a fence lever and rotatable members to be rotatably positioned responsive to rotation of a dial, the rotatable members including peripherally gated tumbler wheels and a drive cam driven from the dial, and electro-optical light sensing and electrical signalling means for producing sensible indications at a remote monitoring station signifying movement of components of the combination lock mechanism. This means comprises a marking having optically distinctive reflectivity properties on a component of the lock mechanism such as the driving cam and/or a tumbler wheel and/or the fence lever and optical sensor means positioned to receive light from the optically distinctive marking electrical signal signifying movement of the optically distinctive marking.
REFERENCES:
patent: 2923928 (1960-02-01), McLaughlin
patent: 3056125 (1962-09-01), Harry
patent: 3171115 (1965-02-01), Calabro
patent: 3623059 (1971-11-01), Rickerd
patent: 4090181 (1978-05-01), Ansari et al.
patent: 4107655 (1978-08-01), Moorhouse
patent: 4185279 (1980-01-01), Bachman
Greiner Garry C.
Shelley, Jr. Joe A.
Sargent & Greenleaf, Inc.
Trafton David L.
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