Lock with an electromechanical release mechanism

Details Lock with an electromechanical release mechanism Lock with an electromechanical release mechanism

1990-04-10

1990-11-27

Wolfe, Robert L.

Locks

Operating mechanism

Using a powered device

70278, E05B 4700

Patent

active

049726943

ABSTRACT:
An "electronic" lock has a thrower with a radial lug for extending and retracting the bolt when turned by a key carrying a proper code. Turning of the thrower through a sufficient distance to shift the bolt is normally blocked by a dogging lever with which the thrower lug abuts. The thrower lug also sweeps a cam track on a second lever so as to pivot the latter during initial turning movement of the thrower away from its rest position. The second lever carries an electromagnet. While the electromagnet remains de-energized there is no interaction between the two levers so that the second lever can pivot independently of the first and turning of the thrower remains limited. When a correct key code is detected, however, the electromagnet is energized to hold the two levers together. Initial turning of the thrower thereby causes the second lever to carry the dogging lever away from its blocking position and thus free the thrower for 360.degree. movement.

REFERENCES:
patent: 4457148 (1984-07-01), Johansson
patent: 4653687 (1987-01-01), Fane
patent: 4802353 (1989-02-01), Corder
patent: 4807455 (1989-02-01), Mauer

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