Automatic door-closing trigger for fireproof door

The utility model adopts the technical scheme as follows: an automatic door-closing trigger for a fireproof door comprises a housing body, a walking rod and an electromagnet fixed on a bottom plate of the housing body, and is characterized in that a fan-shaped pendulum piece capable of driving the w...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	JIANG DEXIONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHECKS FOR WINGS DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL FIXED CONSTRUCTIONS FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES KEYS LADDERS LOCKS SAFES WINDOW OR DOOR FITTINGS WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING
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