Axial split-pin tumbler-type lock mechanism

Details Axial split-pin tumbler-type lock mechanism Axial split-pin tumbler-type lock mechanism

1978-12-11

1980-10-14

Wolfe, Robert L.

Locks

Operating mechanism

Key

70419, E05B 2708

Patent

active

042273870

ABSTRACT:
An axial split-pin tumbler-type lock mechanism having improved pick-resistance is provided with tumblers having substantially the same overall length, at least two of the tumblers having driver elements differing in length, and with spring means in at least two different spring rates respectively to act upon the tumblers having elements differing in length, one of the spring means which has a relatively high spring rate acting upon a tumbler having a relatively short driver element, and another of the spring means which has a relatively low spring rate acting upon a tumbler having a relatively long driver element.

REFERENCES:
patent: 1479305 (1924-01-01), Lee
patent: 1755847 (1930-04-01), Stevens
patent: 1854080 (1932-04-01), Tonnessen
patent: 2050096 (1936-08-01), Schoorel
patent: 2618957 (1952-11-01), Tonnessen
patent: 3270538 (1966-09-01), Kerr

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