Privacy protection for electronic lock system

Details Privacy protection for electronic lock system Privacy protection for electronic lock system

1995-01-03

1997-03-04

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

Automatic and/or with time-delay means

318265, 70277, E05B 4700

Patent

active

056082983

ABSTRACT:
An electronic lock assembly mounts to the opposite sides of a door to provide an electronically operable level of security. An electronic reader generates a signal which is employed to control the operation of a conventional latch installation. A card reader, key pad or contact activatable data port generates a signal to actuate a motor to disengage a locking dog to thereby allow rotation of the latch handle. The motor shaft is connected to a drive screw by a coil spring to permit proper operation if a jamming condition is present. A privacy switch may be operated by an occupant of the room to block actuation of the motor, thereby denying entry to the room. A permanent magnet mounted in the door frame activates a reed switch on opening of the door, disabling the privacy switch and preventing inadvertent disablement of the electronic lock when the room is not occupied.

REFERENCES:
patent: 4148092 (1979-04-01), Martin
patent: 4177657 (1979-12-01), Aydin
patent: 4298792 (1981-11-01), Granholm et al.
patent: 4509093 (1985-04-01), Stellberger
patent: 4802353 (1989-02-01), Corder et al.
patent: 4909053 (1990-03-01), Zipf, III et al.
patent: 4972182 (1990-11-01), Novik et al.
patent: 5204663 (1993-04-01), Lee
patent: 5339662 (1994-08-01), Goldman
patent: 5437174 (1995-08-01), Aydin

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