Locks – Operating mechanism – Key
Patent
1977-09-21
1978-10-31
Wolfe, Robert L.
Locks
Operating mechanism
Key
E05B 1516
Patent
active
041226950
ABSTRACT:
A hardened protective housing is rotatably secured to the outer head of a cylindrical lock for precluding access to and mistreatment of said head for rendering the lock ineffective for its intended purpose.
REFERENCES:
patent: 2047966 (1936-07-01), Jacobi
patent: 2225703 (1940-12-01), Machinist
patent: 3630054 (1971-12-01), Malminen
patent: 3751953 (1973-08-01), Newman
patent: 3850014 (1974-11-01), Flack
patent: 4008588 (1977-02-01), Miller
Kinney, Jr. J. Warren
Monarch Tool & Manufacturing Company
Wolfe Robert L.
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