This article is about a mechanism to hold a door open. For the magnetic locking mechanism, see Electromagnetic lock.
Electromechanical latch used in fire and security systems
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. A fire alarm control panel or a similar emergency control system usually controls the door holder.
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An electromagneticdoorholder (electromagneticdoorholder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop)...
An emergency door release call point (or a pull station in the United States) is used to disengage locking devices such as electromagnets, bolt locks,...
there are certain routines for opening closed doors to buildings and compartments on fire, known as door entry procedures, ensuring fire crew safety where...
in fire sprinkler systems and mechanical automatic door release mechanisms that close fire doors in warehouses, etc. Fire dampers in ventilation systems...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
an armature plate. The principle behind an electromagnetic lock is the use of electromagnetism to lock a door when energized. The holding force should be...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
escape may be provided by a fire exit door, but in most cases the only exit is through a window. When there is a door, it is often fitted with a fire alarm...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
during a fire. To hold an often heavy fire door open simply, electromagneticdoorholders are used that release when a building's fire alarm system is...
Crash bar ElectromagneticdoorholderElectromagnetic lock Emergency exit Emergency light Exit sign Fire curtain Fire cut Fire damper Fire door Fire escape...
replaced the electromagnetic potential field by force fields as the centerpiece of electromagnetic theory. According to Heaviside, the electromagnetic potential...
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