Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1982-12-27
1985-01-22
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
340542, 34082531, H01H 4732
Patent
active
044955405
ABSTRACT:
An electronic combination lock for luggage and the like comprises a microcomputer, a display having a plurality of display locations, and a plurality of push buttons, one being associated with each display location. Each push button advances its associated display location through a sequence of digits and enables selection of a desired digit for display. A displayed set of digits is compared with a stored predetermined set of digits, and a bistable electromagnetic latch is operated to open the lock when the sets of digits match. The electromagnetic latch comprises a magnetic member pivotally mounted for rotation between a pair of pole pieces, the magnetic member having first and second stable rotational positions at which each magnetic pole is adjacent to a different pole piece, and a pair of oppositely wound coils associated with the pole pieces and responsive to the momentary flow of electrical current therethrough for producing a magnetic flux that causes the magnetic member to rotate from one position to the other.
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Bott Lonnie C.
Remington Richard C.
Eisenzopf Reinhard J.
Presto Lock, Inc.
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