High security lock

Details High security lock High security lock

1974-05-06

1976-09-07

Britts, Ramon S.

Deposit and collection receptacles

Separate inlet and outlet openings

232 7, 232 57, B65D 9100

Patent

active

039790525

ABSTRACT:
A keyhole-less magnetically actuated lock, the key having magnets borne on concentric rings rotatable by a dial, the lock having magnetically responsive switches (for example, reed switches) within the lock actuatable by the key, some of the switches providing a series GO function and some providing a parallel NOGO function. In one form, the GO function powers an electric motor within the lock to withdraw the lock bolts, and in another form the actuator is a thermo electric device. Several NOGO techniques are shown, including a toggled circuit breaker and a bucking coil in the motor. A circuit is shown for inverting the GO and NOGO functions to change the combination of the lock, and one embodiment shows placement of two magnets on one ring in the key to render the key unique. Another embodiment shows use of a covert grid of locator marks to direct correct placement of the key against the lock. The lock is shown associated with two forms of coin receptors for coin operated machines, one having a pull-out drawer and the other having a hopper and a delivery chute for collection of the coins. In one form shown, the combination is advanced incrementally each time the lock is opened, the key being reset each time to compensate, and in another form the magnets of the key and the switches of the lock rotate in synchronism as the lock opens. A form is also shown in which the lock is powered from the key.

REFERENCES:
patent: 1470747 (1923-10-01), Juley
patent: 1876894 (1932-09-01), Fitzgerald
patent: 2288222 (1942-06-01), Bockstein
patent: 2566017 (1951-08-01), Cooley
patent: 2676689 (1954-04-01), Galloway
patent: 3116013 (1963-12-01), Eno
patent: 3118597 (1964-01-01), White
patent: 3215903 (1965-11-01), Barney
patent: 3332713 (1967-07-01), DeClaire
patent: 3571544 (1971-03-01), Sheehan
patent: 3718922 (1973-02-01), Williams et al.
patent: 3779052 (1973-12-01), Deitch
patent: 3873892 (1975-03-01), Dettling et al.

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