Magnetic door latch
Magnetic Door Locks : Magnetic Door Latch
Quote from Article entitled Magnetic Door Locks:
A passive lock with a handle by own forces is installed on the same principle as a usual lock. For it the deepening in a leaf is made, and a handle is installed in the hole. In a door box the deepening of the tongue is made. By turning a knob a magnet and a latch are divided, and a door open easily.
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