Locks – Operating mechanism – Key
Patent
1986-08-15
1988-03-22
Wolfe, Robert L.
Locks
Operating mechanism
Key
70358, 70364A, 70367, 70378, E05B 2500
Patent
active
047320230
ABSTRACT:
A modifiable cylinder which comprises a plug and a cylinder body. The plug fits into the cylinder body and has a keyway and a plurality of bottom pin holes which are disposed above and perpendicular to the keyway. Each of the bottom pin holes has a bottom pin. The cylinder body comprises a main chamber housing and a subchamber housing. The main chamber housing has a plurality of top pin holes, each of which has a spring and a top pin. In open position, the top pin holes are aligned with the bottom pin holes. The subchamber housing has a plurality of top pin holes, each of which has a spring, a top pin and several discs. When the plug is turned to the modifying position, the top pin holes are aligned with the bottom pin holes so that the discs can be moved into the bottom pin holes so as to modify the inner combination of the cylinder.
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patent: 3599456 (1971-08-01), Bessim
patent: 4233828 (1980-11-01), Davenbaugh
patent: 4282731 (1981-08-01), Taksony
patent: 4631941 (1986-12-01), Sjunnesson
patent: 4638651 (1987-01-01), Surko, Jr.
Dino Suzanne L.
Wolfe Robert L.
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