Swinging electromagnetic lock

Details Swinging electromagnetic lock Swinging electromagnetic lock

1994-10-06

1996-03-05

Meyers, Steven N.

Closure fasteners

Magnetic

E05C 1756

Patent

active

054960797

ABSTRACT:
A security system, responsive to a threshold force applied to a door, has a lock frame adapted for mounting to a door frame. A housing having an electromagnet mounted thereto swingably mounts to the lock frame. An armature, attractable to the electromagnet, mounts to the door. The housing swings on an axis substantially perpendicular to the door frame header. A pin fixed to the housing extends into the lock frame to limit the swinging of the housing between a first maximum and a second maximum position. A spring disposed between the housing and the lock frame urges the housing toward the first maximum position and sets a threshold force. A microswitch generates a signal upon swinging of the housing relative to the frame when the force of the spring is overcome by a force applied to the door.

REFERENCES:
patent: 3934909 (1976-01-01), Van Natter
patent: 4487439 (1984-12-01), McFadden
patent: 4915431 (1990-04-01), Bailey
patent: 5065136 (1991-11-01), Frolov
patent: 5141271 (1992-08-01), Geringer
patent: 5184854 (1993-02-01), Chen
patent: 5184855 (1993-02-01), Waltz
patent: 5376910 (1994-12-01), Geringer

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