Lever tumbler lock

Details Lever tumbler lock Lever tumbler lock

1988-05-26

1989-06-06

Gall, Lloyd A.

Locks

Operating mechanism

Key

70394, E05B 2502

Patent

active

048360007

ABSTRACT:
The present invention relates to a lever tumbler lock in which the scrape marks caused by the key bit as it displaces the various tumblers will not be completely informative of the configuration of the key bit.
According to the invention the lock includes a device which as a key bit (13) inserted into the lock housing (1) is turned will scrape against at least a part of the cam surface (10) of at least one tumbler (2) such as to create on this cam surface or those cam surfaces scrape marks which cover the scrape marks caused by corresponding cams on the key bit when the key is turned, at least at the beginning and the end of these scrape marks.

REFERENCES:
patent: 108770 (1870-11-01), Dickerman
patent: 246605 (1881-09-01), Egge
patent: 4400956 (1983-08-01), Martin

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