Locks – Operating mechanism – Key
Patent
1990-08-28
1991-06-18
Gall, Lloyd A.
Locks
Operating mechanism
Key
70404, E05B 1902, E05B 2708
Patent
active
050240722
ABSTRACT:
A tumbler pin lock system comprises a lock mechanism and a key. The lock mechanism has an outer tubular casing mounted to a frame of a computer or similar electrical device. The tubular casing has an eccentric through hole for rotatably receiving a locking spindle. The locking spindle includes a driver pin sleeve having a set of bore holes, each for receiving a driver pin. A rotating shaft protrudes from a first side of the driver pin sleeve, and a protrusion with a keyway slot protrudes from a second side of the driver pin sleeve. A tumbler sleeve is provided on the rotating shaft and is fixed to the tubular casing. The tumbler sleeve has a distributed annular set of blind holes, each for receiving a tumbler spring and a tumbler pin, which are alignable with the bore holes in the driver pin sleeve. The key comprises a flattened key handle and a cylindrical portion. A set of annularly disposed semi-cylindrical slots are formed on an outer periphery of a first end of the cylindrical portion to engage with corresponding driver pins disposed in the bore holes in the driver sleeve. A key guide lug is formed inside the set of the semi-cylindrical slots to engage with the keyway slot to turn the rotating shaft relative to the tumbler sleeve to provide a locking or unlocking function. A cutout portion is formed in a middle portion of the cylindrical portion.
REFERENCES:
patent: 1891214 (1932-12-01), Falk
patent: 3339384 (1967-09-01), Greenwald
patent: 4083211 (1978-04-01), Scherbing
patent: 4622834 (1986-11-01), Hughes
patent: 4735069 (1988-04-01), Steinbach
patent: 4831853 (1989-05-01), Liao
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