Locks – Operating mechanism – Key
Patent
1977-03-23
1978-08-22
Wolfe, Robert L.
Locks
Operating mechanism
Key
70364A, 70409, E05B 1906, E05B 3508
Patent
active
041079639
ABSTRACT:
A lock system comprising (1) a first standard size pin-tumbler lock mechanism, such as is used, for example, in an exterior apartment door; (2) a second pin-tumbler lock mechanism substantially smaller in size than the first lock, such as is used for securing an apartment house mailbox; and (3) a key having conventional handle and shank portions, a first set of notches and projections extending along one longitudinal edge of the shank portion such that the key, when properly inserted into the barrel of the standard lock mechanism, will render it operable, and a second set of notches and projections extending partially along the opposite longitudinal edge on the shank at its outer extremity such that when the key is properly inserted into the barrel of the smaller lock mechanism, it will also be rendered operable. The lock system may further comprise a third pin-tumbler lock mechanism of standard size, wherein the key is formed having a rectangular longitudinal projecting ridge along the shank portion, and a third set of notches and projections extending along a protruding edge of the ridge such that the key, when properly inserted in the barrel of the third lock mechanism, will render it operable.
REFERENCES:
patent: 1438336 (1922-12-01), Schroeder
Yorio Albert E.
Yorio Noelle
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