Check-actuated control mechanisms – Including electric circuit with switch operated by check – And holding circuit responsive to operation of switch
Patent
1991-02-04
1992-06-30
Spar, Robert J.
Check-actuated control mechanisms
Including electric circuit with switch operated by check
And holding circuit responsive to operation of switch
307141, G07F 1512, H01H 4300
Patent
active
051254921
ABSTRACT:
A device to control the on/off operation of a television set. It is token activated with each of a number of tokens giving a fixed period of time. The device includes a case with a power cord, an electrical receptacle into which the television set power cord is plugged and secured, a token chute with a mechanism for detecting a passing token, and a token drawer with a lock. Inserted tokens are counted and periods of television time credited. Elapsed time is measured, and periods of elapsed time subtracted from credited time. The set is turned off when net credited time, which is displayed, becomes zero. There is a switch to turn off the set while retaining credited time. There is another switch to allow the set to be used without expending credited time.
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McLean John M.
Treleaven David H.
Lowe Scott L.
Spar Robert J.
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