Peripheral key tumbler lock

Details Peripheral key tumbler lock Peripheral key tumbler lock

1980-12-22

1983-10-04

Wolfe, Robert L.

Locks

Operating mechanism

Key

70407, 70409, E05B 2902

Patent

active

044071477

ABSTRACT:
A two-stage tumbler lock wherein there are two sets of discs, one set being actuatable by a key to free the second set for unlocking movement under the influence of the key. The invention also contemplates a lock designed to receive a peripheral key to cause the above operations.
The invention further contemplates a dog leg key particularly a peripheral dog leg key for effecting the above operations.
The invention still further contemplates a lock having a peripherally located reset member which makes picking most difficult. A further feature of the lock and its key is that the two coact to perform their intended functions in a manner such that the key cannot be withdrawn from the lock until it is returned to the position it first assumed when inserted into the lock.
Another feature of the invention is a disc lock in which the discs have spaced lugs defining the extent of disc movement in regard to a locking member.
A still further feature of the invention is the provision of a set of plugs in the lock coacting with an axial member and plural discs.

REFERENCES:
patent: 688070 (1901-12-01), Denn
patent: 1553639 (1925-09-01), Sherman
patent: 1915897 (1933-06-01), Maxwell
patent: 2578211 (1951-12-01), Spain
patent: 3334501 (1967-08-01), Greenwald
patent: 3821886 (1974-07-01), Ledewig

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