Key and tumbler construction

Details Key and tumbler construction Key and tumbler construction

1977-06-27

1978-08-29

Wolfe, Robert L.

Locks

Operating mechanism

Key

70377, 70406, E05B 1514, E05B 1902, E05B 2908

Patent

active

041094956

ABSTRACT:
A key construction for use with a rotary disc-tumbler lock wherein longitudinal restricting wards in a plurality of cross-sectional profiles are formable along the key shank and a warding tumbler with a similarly shaped key entry opening, which warding tumbler is used in a lock associated with the warded key thereby providing a plurality of correspondingly shaped warding key entry openings in the lock and key profile configurations which permits locks and keys to be grouped into different series with a key from one group of locks being restricted from entering the locks of another group even though the bitting codes are the same.

REFERENCES:
patent: 1635724 (1927-07-01), Morris
patent: 2123940 (1938-07-01), Gray
patent: 3789638 (1974-02-01), Roberts

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