Cartridge of a panic proof lock

Details Cartridge of a panic proof lock Cartridge of a panic proof lock

1988-07-20

1989-03-07

Smith, Gary L.

Locks

Special application

For closures

70462, 272 21, 272 39, E05B 5900

Patent

active

048095265

ABSTRACT:
A cartridge of a panic proof lock comprising a pair of cartridge plates, a pair of slides, a pair of half-serrated rings, a collar and a rotary lever. The cartridge plates have two holes to accommodate two spindles of the lock and a flange perpendicular thereto to guide the movement of the slides. The slides which are inverted U-shaped with one limb inside toothed are oppositely disposed. The half-serrated rings with serration in opposite half circles are disposed inside the slides with the serrations engaging with the corresponding toothed limb of the corresponding slide. Inside each of the half-serrated ring, a pair of recesses are formed to receive the teeth of a collar disposed inside the half-serrated rings. Each recess of the half-serrated ring is larger than the corresponding tooth on the collar so that there is a 40 degree (20 degree for each direction) dead zone of rotation between the collar and the half-serrated rings. The collar has an inside projection which is engageable with one of the spindles to transmit torque to the half-serrated rings and thus to move the slides upwards and downwards. Outside the bottom of each of the slides, a semi-circular notch together with a pair of identical projection disposed thereby is formed.

REFERENCES:
patent: 1664984 (1928-04-01), Lanphere
patent: 3791180 (1974-02-01), Doyle
patent: 3910613 (1975-10-01), Nolin
patent: 3999789 (1976-12-01), Maurits et al.
patent: 4129019 (1978-12-01), Urdal
patent: 4322958 (1982-04-01), Eigemeier
patent: 4333324 (1982-06-01), Dietrich et al.
patent: 4418552 (1983-12-01), Nolin
patent: 4606203 (1986-08-01), Esser
patent: 4616864 (1986-10-01), Douglas

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