Cylinder lock manufacturing method

Details Cylinder lock manufacturing method Cylinder lock manufacturing method

1988-10-26

1992-02-18

Cuda, Irene

Metal working

Method of mechanical manufacture

Assembling or joining

29469, 295642, B21D 3903

Patent

active

050881752

ABSTRACT:
A cylinder lock manufacturing method wherein a plurality of cylinder locks differing in place of use but using a common key for their unlocking are taken as a group having a specific key code assigned thereto. The inner members and outer members of cylinder locks are assembled into respective cylinder locks continuously for one group after another with change of the key code. A key for each group of the locks is notched synchronously with the cylinder assembly process. The cylinder locks and the key so produced through the above processes are combined as a set.

REFERENCES:
patent: 3111748 (1963-11-01), Doll et al.
patent: 3264742 (1966-08-01), Roland
patent: 3378908 (1968-04-01), Buller
patent: 3664007 (1972-05-01), Schlage
patent: 3668909 (1972-06-01), Roberts

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