Magnetic releasing and securing device
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United States of America Patent
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Jul 31, 2012
Grant Date -
Nov 11, 2010
app pub date -
May 7, 2009
filing date -
May 7, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for securing and releasing doors includes at least two electromagnetic latches and a controller. Each of the electromagnetic latches includes a coil configured to be energized by a power signal to create a magnetic field. The controller switches the power signal between the electromagnetic latches so that the power signal is supplied to the electromagnetic latches one at a time. The electromagnetic latches may be electromagnetic door holders, electromagnetic door locks, or any combination of the two.
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