Closure fasteners – Magnetic
Patent
1988-11-18
1990-02-27
Moore, Richard E.
Closure fasteners
Magnetic
292144, 292DIG65, E05C 1756
Patent
active
049040057
ABSTRACT:
A door security system where there is means defining a door entryway and a door pivotally attached to one side of said defining means, the door closing on the other side of the entryway and having a latch extending into a keeper in a jamb defining the entryway, the latch is movable between a latched and an unlatched position, a normally deenergized electromagnetic lock is provided for securing the door to the jamb defining the entryway when the electromagnetic lock is energized, the electromagnetic lock comprises an electromagnet mounted to one of the door and the entryway and an attractable armature on the other of the door and the entryway, a lockset is provided including a first handle on one side of the door for actuating the latch between latching and unlatching states, a first switch responsive to the position of the first handle being between a position to latch or unlatch the latch and to cause the first switch to move between open and closed states, a second handle on the other side of the door independent of the first handle for actuating the latch, a second switch in the doorway defining means being normally open the said latch is in latching position but closed when the latch is retracted, and a third normally closed switch operable by an authorized entry device, the switches being in series and arranged to complete an electrical circuit to the electromagnet when all of the switches are closed.
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Harrow Products Inc.
Moore Richard E.
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