Magnetic key operated door lock

Details Magnetic key operated door lock Magnetic key operated door lock

1976-12-02

1979-01-09

Bonck, Rodney H.

Locks

Special application

For control and machine elements

70218, 70276, 70413, E05B 1310, E05B 4700

Patent

active

041331940

ABSTRACT:
A door lock structure adapted to be actuated by a magnetic card key to operate a conventional cylindrical door lock with substantially no modification to such lock. A housing containing the magnetically operated elements of the lock is mounted, along with a modified knob, on the conventional spindle of the lockset in lieu of the usual door knob. The housing is freely rotatable relative to the lockset spindle to prevent wrenching. The latchbolt retractor of the lockset is actuated in the normal manner to unlock the lockset by rotating a conventional driver bar. The driver bar in this structure is rotated by registering interengaging elements carried by the driver bar and a slide which is actuated by a properly coded magnetic card key. The modified knob may be freely rotatable on the spindle or may be fixed thereto.

REFERENCES:
patent: 2019262 (1935-10-01), Kauffman
patent: 2049742 (1936-08-01), Lowe
patent: 2732703 (1956-01-01), Noregaard
patent: 2931953 (1960-04-01), Barney
patent: 3096114 (1963-07-01), Trammell
patent: 3234767 (1966-02-01), Allander
patent: 3266278 (1966-08-01), Ennitt
patent: 3421348 (1969-01-01), Hallmann
patent: 3584484 (1971-06-01), Hallmann et al.
patent: 3705277 (1972-12-01), Sedley
patent: 3995460 (1976-12-01), Sedley

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