Locks – Parts – attachments – accessories and adjuncts – For key-operated mechanism
Patent
1988-06-20
1989-04-18
Gall, Lloyd A.
Locks
Parts, attachments, accessories and adjuncts
For key-operated mechanism
24 3K, 24239, 24371, 206 371, 206 378, D 3 61, A44B 1500
Patent
active
048215430
ABSTRACT:
The present invention provides a double ended key ring that includes a pair of key holders for retaining a set of keys. The key holders are movably connected to a central housing and are biased to retract into a pair of seats located at the ends of the housing to prevent the removal of the keys from the key holders. When the key holders are pulled away from the housing, the keys may then be removed from the key holders.
The biasing mechanism for the key holders is located entirely within the housing. To this end the housing includes a central passageway that has a narrow bore, at one end, to preferably slidably receive a spring loaded lock pin that projects through the bore and is connected to one of the key holders. In order to permit the spring loaded lock pin and key holder to be assembled, the other end of the bore remains open until closed by a bushing. The bushing includes a tubular sidewall and an endwall having another narrow bore. Another spring loaded lock pin is slidably extended through the bore of the endwall and is connected to the other of key holders, preferably as a subassembly. The bushing is then connected within the other end of the passageway by a force fit.
REFERENCES:
patent: 370918 (1887-10-01), Armstrong
patent: 828823 (1906-08-01), Maize
patent: 974950 (1910-11-01), Carter
patent: 995260 (1911-06-01), Korf et al.
patent: 1357669 (1920-11-01), Anderson et al.
patent: 1375090 (1921-04-01), Grode
patent: 1460998 (1923-07-01), Zangrilli
patent: 1644562 (1927-10-01), Browning
patent: 2916907 (1959-12-01), Bridwell
patent: 3597951 (1971-08-01), Nadel
G. Pruefer Mfg. Co.
Gall Lloyd A.
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