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

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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