Magnetic smoke and fire shield

Details Magnetic smoke and fire shield Magnetic smoke and fire shield

1981-08-31

1983-08-16

Caun, Peter M.

Movable or removable closures

Thermal releaser or actuator

Fusible closure latch or retainer

160 23R, 160 1, E05F 1520

Patent

active

043983715

ABSTRACT:
A magnetic smoke and fire shield is disclosed for installation adjacent an air register associated with a building conduit to control the conduit opening. The apparatus includes a frame containing an opening, and a closure member connected with the frame for movement between open and closed positions relative to the frame opening. At least one of the closure members and frame is formed of ferromagnetic material, the other member having magnetic sealing means associated therewith. The closure member is retained in the open position by means including a fusible link set to melt at a predetermined temperature. The closure member may also be released manually. Upon the occurrence of a fire, the closure member is released to a closed, magnetically sealed position relative to the frame opening.

REFERENCES:
patent: 445372 (1891-01-01), Johns, Jr.
patent: 949482 (1910-02-01), Kabareck
patent: 1618551 (1927-02-01), Perry et al.
patent: 2639751 (1953-05-01), Flaherty
patent: 3451706 (1969-06-01), Baermann
patent: 3597809 (1971-08-01), Crane
patent: 3650069 (1972-03-01), Alley
patent: 3756137 (1973-09-01), Scharres
patent: 3777422 (1973-12-01), Janssen
patent: 3950894 (1976-04-01), DiMaio
patent: 4090437 (1978-05-01), Bogaent

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