Fire or smoke barrier
AssigneeCoopers Fire Limited
InventorJames Martin Reed
Life of this patent
Estimating the term…
Abstract
A fire or smoke barrier (1) having a head box (2) for housing a curtain (4) which is open at its underside to allow the curtain to be deployed and withdrawn. The head box (2) houses a roller (3) for the curtain (4) to be rolled from for deployment and rolled back onto for withdrawal and attached at the bottom of the curtain (4) is a bottom bar (7) for weighing down the curtain (4) when deployed. The head box (2) has one or more apertures (14, 15) for cleaning air circulation and being provided at the, or each, aperture (14,15) with a spring (22) loaded trap (16,17) normally held open by a fusible link (31), the link fusing (31) in event of fire.
Claims12
A smoke or fire barrier having a curtain comprising:
- a head box for housing the curtain, open at its underside to allow the curtain to be deployed and withdrawn;
- a roller, housed in the head box, for the curtain to be rolled from for deployment and rolled back onto for withdrawal;
- and
- a bottom bar attached to a bottom of the curtain for weighing down the curtain when deployed, wherein the bottom bar closes the open underside of the head box when the curtain is withdrawn;
- the head box having:
- two air duct end fittings for passing clean air;
- two apertures for clean filtered air circulation, one of the two aperture for admission of clean air to the head box and the other aperture of the two apertures for withdrawal of the air from the head box,
- wherein each said aperture is provided on a topside of the head box with a spring loaded trap also fitting to the topside of the head box,
- wherein each said spring loaded trap is normally held open by a fusible link, the link fusing in event of fire;
- and
- wherein each said spring loaded trap and each said aperture are provided within each said air duct end fitting.
Dependencies are inferred from the claim text.