Metal working – Means to assemble or disassemble – Tumbler lock
Patent
1985-05-13
1987-05-12
Schmidt, Frederick R.
Metal working
Means to assemble or disassemble
Tumbler lock
292435, 29275, B23P 1900
Patent
active
046638393
ABSTRACT:
A cabinet push lock has a key plug held by a retaining pin engaged in a circumferential groove in the key plug and mounted in a bore coplanar with the pin tumbler bores. The pin tumbler stacks are held in their bores by an elongated cap mounted in a groove closed at the front and extending across both the pin tumbler bores and the retaining pin bore. The cap is held against endwise movement, as by interlocking with the sides of the groove. The groove side walls are staked at spaced areas to releasably retain the cap, and other areas are reserved for subsequent restakings. The retaining pin bore, an aligned diametric bore in the key plug, and a bottom opening in the lock body provide a passage for transmission of thrust to drive a portion of the cap out of the groove to permit cap removal. The diametric bore in the key plug contains a drive pin to block the key slot, and a key stop ahead of the drive pin blocks an additional portion of the key slot. Cap-removing thrust is exerted by driving the drive pin against the retaining pin and thereby driving the retaining pin against the overlying portion of the cap. A capping tool is provided to control the swaging so as to permit repeated recappings and have easy and repeated recombinatings of the lock.
REFERENCES:
patent: 2138404 (1938-11-01), Haas
patent: 2881646 (1959-04-01), Farr et al.
patent: 3176488 (1965-04-01), Jacobi
patent: 3425115 (1969-02-01), Handwerk et al.
patent: 4095327 (1978-06-01), Hartmann
Best Lock Corporation
Schad Steven P.
Schmidt Frederick R.
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