Fireplace outside air inlet

Details Fireplace outside air inlet Fireplace outside air inlet

1982-04-06

1984-05-08

Yeung, James C.

Stoves and furnaces

Liquid heater

126285A, 126288, F22B 902

Patent

active

044468474

ABSTRACT:
A draft inlet or control for admitting outside air to a fireplace comprises a conduit sized to be set in and through the brickwork of a fireplace, preferably in the rear wall. The end facing into the fireplace has a face plate with radially spaced openings therein over which is a finger or poker operable rotatable shutter having like radially spaced openings permitting closing of the draft inlet when the two sets of openings are out of register. In one design, the shutter is held in place by a top plate spot welded to flanges on the conduit and having a circular opening with a restraining lip stamped in the edge of the opening to hold the shutter. In another design, the end plate and shutter are cast of a metal such as case iron, aluminum or brass and are held together and to the conduit by suitable fastening means, a top plate not being required.

REFERENCES:
patent: 37781 (1863-02-01), Turner
patent: 613781 (1898-11-01), Schneider
patent: 811199 (1906-01-01), Calhoun
patent: 948007 (1910-02-01), Doane
patent: 2740398 (1956-04-01), Collins
patent: 4248206 (1981-02-01), Orthey, Jr.

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