Locks – Operating mechanism – Key
Patent
1978-02-23
1980-01-29
Dorner, Kenneth
Locks
Operating mechanism
Key
33174F, E05B 1920, G01B 520
Patent
active
041854829
ABSTRACT:
A mechanism for opening and/or decoding the biddings of a key for opening a cylinder lock. The mechanism comprises a housing having a forward projection shaped in the form of a key body and an abutment surface spaced from the forward projection disposed to abut the cylindrical plug of the lock when the forward projection of the housing is inserted in the keyway of the lock. A plurality of shims, including at least one shim associated with each lock tumbler, are supported in the housing, for longitudinal movement within the housing. Each of the shims have an elongated portion directed toward and supported in the forward projection of the housing and a tumbler actuating cam extending from the elongated portion. A plurality of actuators are associated with the plurality of shims respectively. Each actuator is selectively shiftable for moving its respective shim with respect to the associated tumbler to position the tumbler for opening the lock. Indicia on the housing associated with the actuators indicates the positions of the actuators corresponding to the respective positions of each of the tumblers whereby the biddings of a key to move said tumblers to their respective positions to open the lock may be determined.
REFERENCES:
patent: 1965336 (1934-07-01), Fitzgerald
patent: 1991151 (1935-02-01), Hansen
patent: 2087423 (1937-07-01), Abrams
patent: 2279592 (1942-04-01), Machinist
patent: 2338768 (1944-01-01), Johnstone
patent: 2720032 (1955-10-01), Harwell
patent: 3827151 (1974-08-01), Naill
Dorner Kenneth
Kessler Lawrence P.
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