Locks – Operating mechanism – Key
Patent
1973-09-11
1976-08-17
Frazier, Roy D.
Locks
Operating mechanism
Key
70421, 70419, E05B 2700
Patent
active
039746704
ABSTRACT:
A turnover key with indentations on both sides for operation of bolt keepers of a cylinder lock, and with a sloped keyway at the tip of the key. The sloped keyway, which is situated before each row of indentation, runs almost to the opposite broad side of the key and into it.
REFERENCES:
patent: 3035433 (1962-05-01), Testa
patent: 3349587 (1967-10-01), Keller
patent: 3742744 (1973-07-01), Lumme
patent: 3777520 (1973-12-01), Crepinsek
Aschenbrenner Peter A.
Dubno Herbert
Frazier Roy D.
Josef Voss KG
Montague Ernest G.
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