Flexible or portable closure – partition – or panel – Fabric fastening means – To elongated element
Patent
1980-01-14
1982-06-08
Makay, Albert J.
Flexible or portable closure, partition, or panel
Fabric fastening means
To elongated element
160 1, E05F 1520
Patent
active
043333923
ABSTRACT:
Fire dampers are disclosed for use in air ducts to arrest the flow of gases and flame through the ducts in the event of a fire. The dampers each include a frame defining a generally rectangular central opening and a plurality of blades which are normally disposed in a folded position at one side of the frame but which can be moved by spring means to an unfolded position in which they extend across the opening of the frame in the event of a fire. A fusible link means normally retains the blades in their folded position. Locking members are provided for retaining the blades in their unfolded position after they have been released by the fusible link means. In one embodiment, the locking members engage integral tabs formed on the endmost blade. In another embodiment, the endmost blade has an end portion which is deflected at an acute angle with respect to the remainder of the blade and which engages over locking brackets secured to the frame.
REFERENCES:
patent: 1998124 (1935-04-01), Eisenman
patent: 3525378 (1970-08-01), Rout
patent: 3747662 (1973-07-01), Kurz
patent: 3907020 (1975-09-01), Rout
patent: 4175607 (1979-11-01), Tatum et al.
Hart Andrew J.
Nailor Michael T.
Joyce Harold
Makay Albert J.
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