Key and installation double cylinder for a security lock

Details Key and installation double cylinder for a security lock Key and installation double cylinder for a security lock

1995-02-15

1997-09-16

Lindsey, Rodney M.

Locks

Operating mechanism

Key

70DIG60, 70396, E05B 1902

Patent

active

056668350

ABSTRACT:
A key and an installation double cylinder for a security lock is disclosed with two cylinder halves, a cylinder core and tumblers which are constructed as core pins and housing pins and can be brought into line by means of the key, which can be inserted into the keyway to release the cylinder core for rotation. The key has, at its bit, a lengthening element by which the tumblers in an oppositely located cylinder half can be brought into line for free turning. The cylinder half on the outside of the door can have a solid rotor of hardened steel which protects the cylinder half on the inside.

REFERENCES:
patent: 149191 (1874-03-01), Brady
patent: 160660 (1875-03-01), Erbe
patent: 1438525 (1922-12-01), Godlewski
patent: 3533254 (1970-10-01), Albert
patent: 3974671 (1976-08-01), Rossetti
patent: 4031729 (1977-06-01), Gretler
patent: 4068510 (1978-01-01), Neary
patent: 4120184 (1978-10-01), Gerlach
patent: 4195504 (1980-04-01), Foshee
patent: 4292824 (1981-10-01), Keller
patent: 5479801 (1996-01-01), Keller

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