Cycle lock
First Claim
1. A cycle lock comprising:
- a housing;
a cylindrical plug rotatably mounted in said housing and having a key-receiving slot therein that opens out to the cylindrical surface, said cylindrical plug having a first end and a second end; and
a plurality of flat disc-like tumblers, each tumbler in said plurality having an elongated central hole, said plurality being loosely mounted for compound rotational and radial movement on a tumbler shaft engaging each of said elongated holes and secured to said housing parallel with the rotational axis of said cylindrical plug, each of said plurality of tumblers having on its periphery a pair of spaced lobes, said tumblers being in a neutral state when both lobes on a tumbler are in contact with the surface of said cylindrical plug, each of said lobes being configured to enter the key-receiving slot in said plug in the absence of a high segment on a key in said key-receiving slot.
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Accused Products
Abstract
A cycle lock having at least one plurality of disc-like tumblers loosely mounted on a shaft parallel with the axis of rotation of the key rotated lock cylinder. Each tumbler has a two spaced lobes which, in the neutral state of the tumbler, contact the arcuate surface of the cylinder but one of the lobes may drop into the key slot in the cylinder if not occupied by a high segment on the key. A key is initially inserted into the lock at a special location at which all tumblers are in their neutral state, and the rotation of the key to its normal position of insertion and removal will set the lock tumblers according to the key coding. In one embodiment particularly useful for hotels, etc., two sets of tumblers are employed: one set for transient or guest keys, a second set for service personnel keys, and a third key, a grand master key, operates the second tumbler set and can reset both sets of tumblers for accepting new keys with different codings thereon.
19 Citations
17 Claims
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1. A cycle lock comprising:
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a housing; a cylindrical plug rotatably mounted in said housing and having a key-receiving slot therein that opens out to the cylindrical surface, said cylindrical plug having a first end and a second end; and a plurality of flat disc-like tumblers, each tumbler in said plurality having an elongated central hole, said plurality being loosely mounted for compound rotational and radial movement on a tumbler shaft engaging each of said elongated holes and secured to said housing parallel with the rotational axis of said cylindrical plug, each of said plurality of tumblers having on its periphery a pair of spaced lobes, said tumblers being in a neutral state when both lobes on a tumbler are in contact with the surface of said cylindrical plug, each of said lobes being configured to enter the key-receiving slot in said plug in the absence of a high segment on a key in said key-receiving slot. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification