Key-operated device for access control system

Details Key-operated device for access control system Key-operated device for access control system

1980-01-15

1981-09-15

Wolfe, Robert L.

Locks

Operating mechanism

Key

70347, 70409, E05B 1506

Patent

active

042890012

ABSTRACT:
A key-operated device, for example for controlling access to switch gear or potentially dangerous machinery, has a rotary motion with an axially inserted key but departs from the usual barrel lock construction which is sensitive to foreign matter. Instead it has a faceplate in front of a stationary body with a cylindrical member rotatable in it and having a recess for the key and circumferentially spaced notches in a flange close behind the plate and prevented from direct access through the keyhole by a fixed axially extending wall on the back of the plate but accessible by appropriate lugs on the key when the latter is inserted. The rotatable member is connected through a spindle to a switch, valve or latch or other actuated device.

REFERENCES:
patent: 1553639 (1925-09-01), Sherman
patent: 1888918 (1932-11-01), Godden

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