Apparatus for controlling the operation of a door
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United States of America Patent
Stats
-
Aug 30, 1983
Grant Date -
N/A
app pub date -
Mar 19, 1981
filing date -
Mar 19, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for controlling the operation of a door provided with a door closer comprises a body of ferromagnetic material mounted on a portion of a building adjacent the door, an electromagnet mounted on the door (the positions of the electromagnet and body may be reversed), a power supply, an actuator and a timer which connects the electromagnet to the power supply upon actuation by the actuator and disconnects the electromagnet from the power supply after a predetermined interval, thereby allowing the door closer to close the door.
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Family
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Cited Art Landscape
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