Flat key cylinder lock with anti-burglar features

Details Flat key cylinder lock with anti-burglar features Flat key cylinder lock with anti-burglar features

1987-02-25

1991-09-24

Smith, Gary L.

Locks

Operating mechanism

Key

70492, 70386, 70419, E05B 2706

Patent

active

050504126

ABSTRACT:
The cylinder lock comprises a plug and auxiliary pins which are disposed in seats, provided on the plugs and arranged laterally to the channel of introduction of the key. On introducing the key into the lock the pins are displaced from their seats such that, when the key is not the right one, they will engage into recesses on the outer casing of the lock, thus inhibiting rotation of the plug. By intervening on the pins it is also possible to obtain a set of hierarchically different locks for fabricating master key systems.

REFERENCES:
patent: 1961586 (1934-06-01), Heyer
patent: 2021185 (1935-11-01), Hurd
patent: 2149733 (1939-03-01), Hagendorn et al.
patent: 2232137 (1941-02-01), Rolph
patent: 2578211 (1951-12-01), Spain
patent: 2831338 (1958-04-01), Spain
patent: 3479849 (1969-11-01), Check
patent: 3656328 (1972-04-01), Hughes
patent: 3722240 (1973-03-01), Spain et al.
patent: 3985010 (1976-10-01), Idoni
patent: 4377082 (1983-03-01), Wolter
patent: 4434636 (1984-03-01), Prunbauer
patent: 4608842 (1986-09-01), Tietz
patent: 4612787 (1986-09-01), Prunbauer
patent: 4638651 (1987-01-01), Surko Jr.

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