Electromagnetic door lock
The amazing image below, is part of Magnetic Door Locks write-up which is arranged within Locks, and posted at September 15th, 2016 07:19:03 AM by adminz.
Magnetic Door Locks : Electromagnetic Door Lock
Quote from Article entitled Magnetic Door Locks:
The operating principle of an electromagnetic lock is more complicated. A door is held closed for as long as a lock has electric supply. It opens with a special magnetic key or code that is entered on a panel provided for this purpose. At the same time power supply is cut off and a magnet opens.
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