A ROLLING FIRE DOOR INCLUDING A DOOR HOLD-OPEN/RELEASE SYSTEM

A rolling fire door includes a door holdopen/release system that includes an electromagnet which is energized by a controller when the door is in the open position. The energized electromagnet magnetically attracts a bottom bar of the rolling door to secure the door in the open position. A key contr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DEVER, JAMES E, RODGERS, RICHARD M.A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHECKS FOR WINGS DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL FIRE-FIGHTING FIXED CONSTRUCTIONS FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES HUMAN NECESSITIES KEYS LADDERS LIFE-SAVING LOCKS SAFES WINDOW OR DOOR FITTINGS WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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Beschreibung
Zusammenfassung:	A rolling fire door includes a door holdopen/release system that includes an electromagnet which is energized by a controller when the door is in the open position. The energized electromagnet magnetically attracts a bottom bar of the rolling door to secure the door in the open position. A key control station connected to the controller enables the electromagnet to be energized when the door is in the open position and enables the controller to deenergize the electromagnet so that the weight of the door causes the door to close. The key control station also includes a test switch which enables the controller to deenergize the electromagnet after a delay interval. The controller also deenergizes the electromagnet after a delay interval in response to activation of an alarm or in response to a thermal switch sensing a temperature in excess of a set point temperature.