Door locking device

Details Door locking device Door locking device

1980-05-09

1982-12-07

Lyddane, William E.

Locks

Special application

For closures

70120, 70417, 292 39, 292142, E05B 5900, E05B 6314

Patent

active

043620345

ABSTRACT:
A door-locking device is described including a plurality of locking bars drivable to a locking position projecting from the sides of the door into the door frame by means of a rotatable drive gear and a plurality of gear-cam segments, one for each locking bar. Each segment includes gear teeth formed on a first portion of its outer circumference meshing with the teeth of the drive gear, and a cam surface formed on a second portion of its outer circumference engageable by a cam follower carried by its respective locking bar. The locking device further includes a key-operated locking cylinder and an overlying protector plate having an opening covered by a disc formed with the key slot, the disc being yieldingly secured to the protector plate to thereby prevent a drill from penetrating same into the lock cylinder.

REFERENCES:
patent: 930328 (1909-08-01), Wilkinson
patent: 1018475 (1912-02-01), Bedell
patent: 1565754 (1925-12-01), Orth
patent: 1910125 (1933-05-01), Root
patent: 2034746 (1936-03-01), Ciak et al.
patent: 2714814 (1955-08-01), Shaffer
patent: 3083563 (1963-04-01), Greenwald
patent: 3175376 (1965-03-01), Cantwell
patent: 4037440 (1977-07-01), Shabtai et al.
patent: 4074552 (1978-02-01), Smith
patent: 4154070 (1979-05-01), Bahry et al.
patent: 4160368 (1979-07-01), Solow
patent: 4222253 (1980-09-01), Peitsmeier

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