High security lock

Details High security lock High security lock

1987-05-28

1989-06-06

Smith, Gary L.

Locks

Operating mechanism

Key

70367, E05B 2700, E05B 2900

Patent

active

048360015

ABSTRACT:
A lock includes a lock housing and an interchangeable core including a core body, a core sleeve, and a key plug having a key slot. A bridge member is provided on a flange of the key-way disc to cover a portion of the longitudinal opening of the key slot in the key-way disc. In one embodiment, a cylinder cap is threadedly mounted on the lock cylinder housing to protect the core and a key-way disc is mounted in the cylinder cap to protect the key plug while still permitting insertion of an operating key into the key slot of the key plug. A spin-free pin is mounted for free rotation in the lock cylinder housing for blocking rotation of the protective cylinder cap in relation to the lock cylinder housing. A setscrew is provided in the lock cylinder housing to urge the spin-free blocking pin into rotation-blocking engagement with the threaded cylinder cap. In other embodiments, the cap is mounted on the lock core for removal therewith by a control key from a lock cylinder housing or a padlock case. In cases where the cap is used with a lock cylinder, a cylinder ring having a groove in an interior wall that opens toward either the cylinder cap or the lock cylinder is also provided. The exterior surface and the circumferential groove of the cylinder ring are case hardened.

REFERENCES:
patent: 1714423 (1929-05-01), Jacobi
patent: 2059694 (1936-11-01), Jacobi
patent: 2073583 (1937-03-01), Olson
patent: 2744405 (1956-05-01), McClelland
patent: 3402582 (1968-09-01), Jacobi
patent: 3882699 (1975-05-01), Flack et al.
patent: 4222253 (1980-03-01), Peitsmeier
patent: 4435967 (1984-03-01), Best et al.
patent: 4545223 (1985-10-01), Poutiainen et al.

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