Lock housing with a key way blocking means

Details Lock housing with a key way blocking means Lock housing with a key way blocking means

1995-03-30

1996-07-16

Boucher, Barnell M.

Locks

Operating mechanism

Key

70 52, 70 39, 70455, E05B 6722

Patent

active

055356095

ABSTRACT:
A lock housing with a key way blocking means for selectively blocking the key way includes a pair of meshing halve lock housings, and a circular ring turnably secured on one of the lock housing. The circular ring includes an aperture at one side which is sized and shaped in correspondance with the key way of the lock housing. When the circular ring is turned to a first direction, the key way of the lock housing is exposed outwardly for insertion of a legal key to unlock the lock. When the circular is turned to a second direction, the aperture of the ring departs away from and blocks the key way.

REFERENCES:
patent: 2169895 (1939-08-01), Evans
patent: 2904985 (1959-09-01), Murphy
patent: 4584855 (1986-04-01), Burlingame
patent: 4888967 (1989-12-01), Kuo
patent: 4918949 (1990-04-01), Newbold
patent: 5010746 (1991-04-01), Zane et al.

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