Locks – Operating mechanism – Key
Reexamination Certificate
2006-02-07
2006-02-07
Walsh, John B. (Department: 2151)
Locks
Operating mechanism
Key
C070S211000
Reexamination Certificate
active
06993944
ABSTRACT:
A dead bolt lock having a slot or slots for insertion on a dead bolt and legs for spanning the underlying door knob of a door to secure the dead bolt. In an adjustable embodiment the dead bolt lock includes a lock housing having a circular rim and downwardly-extending legs, with notches disposed around the curved top portion of the housing rim. A round opening in the center of the housing rotatably accommodates at least a middle plate, closed by front plate, and a rear plate, the middle plate provided with a middle plate profile slot for receiving a sliding retainer block. The retainer block alternately recesses in a corresponding retainer block slot adjoining the middle plate profile slot and extends into the middle plate profile slot for selective engagement with the dead bolt when the dead bolt lock is in locked configuration. The front plate and rear plate are connected to the middle plate and each have slots that correspond to the middle plate profile slot for accommodating the dead bolt. Spring-loaded adjusting and keeper mechanisms are slidably recessed in the middle plate to facilitate rotating and locking the rear plate, middle plate and front plate in concert on a dead bolt oriented in any angular locked position on a door. Fixed, vertical, horizontal, X-slot and cross-slot configurations are also alternatively provided in the lock housing for accommodating dead bolts in various angular locked configurations.
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Harrison John M.
Walsh John B.
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