Bar-tumbler type safety lock

Details Bar-tumbler type safety lock Bar-tumbler type safety lock

1976-02-05

1978-01-24

Wolfe, Robert L.

Locks

Operating mechanism

Key

70422, 29445, E05B 2708

Patent

active

040696952

ABSTRACT:
Disclosed is a bar-tumbler type safety lock, as well as a key and a coding process for said lock. According to a single-key-entry embodiment, this lock comprises a body, a two-piece washer, a latch holder and a barrel having recesses in which notched tumblers can slide and which is maintained rotatingly and removably toward the front of said body by a stud and a stopping finger retained in two annular slots made radially in this body and which can be retracted by the introduction of a special extraction key into the lock; the coding of the lock is obtained by the turning, in the annular washer-assembly groove, of notches made simultaneously in each of the tumblers with the key inserted.

REFERENCES:
patent: 1240530 (1917-09-01), Baird
patent: 1677432 (1928-07-01), Croning
patent: 1979939 (1934-11-01), Jacobi
patent: 2570765 (1951-10-01), Cerf

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