Construction keying

Locks – Operating mechanism – Key

Patent

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Details

70400, 70401, 70454, E05B 1908

Patent

active

048753521

ABSTRACT:
The invention comprises a two part key which replaces a conventional key in a conventional lock cylinder for purpose of temporary use wherein one of the parts is a plastic or similar material insert which replaces a portion of the conventional key and a short conplementary key which permits operation of the lock in conjunction with the insert. The insert being secured in the cylinder by means of the cylinder locking pins and being removable only by means of a special installation and extraction tool.

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