Lock of the dead bolt type

Details Lock of the dead bolt type Lock of the dead bolt type

1979-04-25

1981-05-19

Moore, Richard E.

Closure fasteners

Bolts

Sliding

E05C 116

Patent

active

042680751

ABSTRACT:
A door lock of the dead bolt type in which an eccentric cam on the inner end of a lock cylinder can be rotated to engage a deformation in a ring, causing the ring to rotate. A linkage connects the ring to a bolt so that rotation of the ring causes reciprocation of the bolt, the ring being concentric with and supported by the cylinder. An engagement portion of the ring that extends beyond the cylinder forms the deformation, preferably a recess, permitting the cam to engage and disengage the recess as it makes a complete revolution. The cam engages opposite ends of the recess to move the bolt in opposite directions. A spring, that can be disposed within the bolt, is used to bias the ring toward positions corresponding to extended and retracted positions of the bolt.
A catch mechanism can be provided to engage a housing and resist movement of the bolt if the bolt is forced toward its retracted position.

REFERENCES:
patent: 854847 (1907-05-01), Schmitt
patent: 3606422 (1971-09-01), Hennessy
patent: 3702549 (1972-11-01), Solouieff et al.

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