On the smokeless fire-place : chimney-valves, and other means, old and new, of obtaining healthful warmth and ventilation (1855)
Arnott, Neil, 1788-1874 · London : Longman, Brown, Green, and Longmans · leaf 52
thenbe allowed to pass away as smoky air. Both of theseerrors are completely corrected in the smokeless gratedescribed in the last chapter. Fig. 3 exhibits, in section, a ventilating valve in itsplace. A C, is part of the ceiling of the room.C, the cornice. D E, the chimney-flue in a brick wall.O,… … 38 THE VENTILATION W, the counterbalancing weight. H I, the wire by which a hand below at the screw or peg I, controls or shuts the valve. The wire pulls at the short arm of a bent lever of which the long arm then presses on the back of the plate to close it.G, is a front view of a valve. It may be…
Heating · Ventilation · Fireplaces
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