Changeable keylock having tumblers with shiftable pivot seats

Details Changeable keylock having tumblers with shiftable pivot seats Changeable keylock having tumblers with shiftable pivot seats

1982-12-13

1985-05-14

Smith, Gary L.

Locks

Operating mechanism

Key

70377, E05B 2500

Patent

active

045164177

ABSTRACT:
Disclosed is a key changeable lock of the lever tumbler type wherein at least one tumbler has a series of seats which are alternatively engageable with a fixed pivot. A biasing spring urges the tumbler seats toward the pivot and tends to hold a particular seat against the pivot to define the axis of tumbler rotation. To change the combination, the tumbler is positively shifted along the series of seats by turning a key which bears against the tumbler and overcomes the biasing force of the spring, displacing one seat from the pivot and shifting the tumbler until another seat engages the pivot.

REFERENCES:
patent: 1049648 (1913-01-01), Benham
patent: 1136067 (1915-04-01), Watson
patent: 1148282 (1915-07-01), Benham
patent: 1268900 (1918-06-01), Watson
patent: 1447865 (1923-03-01), Kihm
patent: 1534495 (1925-04-01), Benham
patent: 1546001 (1925-07-01), Benham et al.
patent: 1573741 (1926-02-01), Parent
patent: 3665741 (1972-05-01), Holst
patent: 3727439 (1973-04-01), Parrock
patent: 3978700 (1976-09-01), Glass
patent: 4072032 (1978-02-01), Phillips

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