Locks – Operating mechanism – Key
Patent
1980-01-17
1982-01-26
Wolfe, Robert L.
Locks
Operating mechanism
Key
70456R, E05B 1904
Patent
active
043122000
ABSTRACT:
A key construction comprising a pair of key shanks joined at one end to provide a unitary body portion having aligned, oppositely extending key bits each of which is adapted for use in a different lock tumbler. In one of its forms, the key shanks are secured in end-to-end relation by means of a sleeve. The sleeve desirably is provided with a pin to which an end of a key bit receiving and holding member is attached. The key bit receiving and holding member advantageously is constructed in a manner to enable only one of the key bits to be pivoted from a normally, inoperable position in the receiving and holding member to an operable, lock tumbler engaging position. Thus, one key bit can be easily and readily distinguished from the other key bit, and there can be no mistake as to which key bit is to be engaged in which lock tumbler. In another of its forms, one of the key bits is provided with a groove or depression which desirably is engaged by a ridge or rib formed on the inner wall of a key bit receiving and holding member which is separable from the joined key shanks. This arrangement likewise enables one key bit to be easily and readily distinguished from the other key bit.
REFERENCES:
patent: 2105763 (1938-01-01), De Berry
patent: 3292400 (1966-12-01), Merila
patent: 3420078 (1969-01-01), Nielsen
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