Key operated magnetic tumbler lock

Details Key operated magnetic tumbler lock Key operated magnetic tumbler lock

1974-11-04

1976-03-09

Craig, Jr., Albert G.

Locks

Operating mechanism

Using a powered device

70358, E05B 4700, E05B 2700

Patent

active

039423450

ABSTRACT:
A key operated locking device of the type using a coded magnetic key to operate a plurality of correspondingly coded magnetic tumblers. The device serves to selectively lock and unlock relative rotation between inner and outer coaxial cylinders in which the inner cylinder has a keyway disposed therein for receiving the magnetically coded key and also carries a plurality of spring-biased magnetic tumblers which magnetically interact with the key. The outer cylinder is provided with a plurality of detents cooperating with the magnetic tumblers wherein the tumblers are normally spring-biased into engagement with the detents of the outer cylinder and are unlocked therefrom by inserting a properly coded magnetic key into the inner cylinder keyway to withdraw in concert the tumblers from the detents by magnetic attraction. With the key in place the inner cylinder may then be rotated relative to the outer cylinder, while the magnetic attraction continuously maintains the tumblers in a recessed or condition inside the inner cylinder.

REFERENCES:
patent: 2079628 (1937-05-01), Olson
patent: 3566637 (1971-03-01), Hallmann
patent: 3657907 (1972-04-01), Boving

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