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An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.
In order to provide the shear magnetic lock with the appropriate holding force, then two pins lock the armature onto the magnet itself, and ensure that the magnet locks into place. An improved "shear" electromagnetic lock was patented on May 2, 1989, by Arthur, Richard and David Geringer of Security Door Controls, an access control hardware ...
An electropermanent magnet or EPM is a type of permanent magnet in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet. The magnet consists of two sections, one of "hard" (high coercivity) magnetic material and one of "soft" (low coercivity) material. The ...
“To ensure safe use and storage for a fire extinguisher, check the pressure gauge once a month, hold the extinguisher to confirm it’s full, store at room temperature, and ensure it’s visible ...
A "through-the-lock" tool that is essentially a modified pinch bar, designed to pull lock cylinders out of doors, and thus allow entry for firefighters. Supply line, supply hose, large-diameter hose fire hose, usually larger than 2.5 inches (64 mm) in diameter, used to transport water from one source to another, such as from a hydrant to a fire ...
A magnetic keyed padlock A magnetic keyed padlock. A magnetic keyed lock or magnetic-coded lock is a locking mechanism whereby the key utilizes magnets as part of the locking and unlocking mechanism. Magnetic-coded locks encompass knob locks, cylinder locks, lever locks, and deadbolt locks as well as applications in other security devices.
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