Specification of William Smith and Donald Bethune : chimneys and furnaces.

  • Smith, William.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Smith and Donald Bethune : chimneys and furnaces. Source: Wellcome Collection.

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    Specification. Smith Cf Betliunfo Mode of Consuming or Preventing Smoke in Chimneys, <§c. grate and into the flue of the chimney, and air is admitted through a plate place.l at or near the bottom of the flue which passes into the chimney, so that such air comes in contact with the gases arising from the fuel in the grate, and ignition takes place. The air may be admitted higher up the flue if necessary. By another mode, we alter the size of the opening above the grate or stove 5 now in common use, and alter its shape ; and we also in some instances alter the shape and angle of such opening, and we place what may be termed a hood at or near the opening of the grate or stove into the flue of the chimney, which hood we perforate with holes or openings, so as to admit the passage of air into the opening, and which air comes in contact with the gases arising from the 10 lire in the grate, and causes such gases to ignite. We also use a damper in this as well as in the other places mentioned, and blowers may be used when the fires are first lighted. And we do not confine ourselves to the details herein mentioned. For the consumption of smoke in furnaces w’e employ what may be termed 15 a double door with a space of about an inch, more or less, between the two doors, and we make an opening or openings for the admission of air near the top and bottom of the outside door, nearly the whole length of the door, and about an inch wide, more or less, according to the size of the door, and we pdace bars or ribs between the doors about half an inch in depth, so as to 20 break the current of air and to cause the air to pass over them, and thus become heated, and then enter the furnace about the centre of the inner door through openings made for that purpose nearly the whole length of the inner door, and of a width corresponding with the size of the openings in the outer door, allowing for the expansion of air on its becoming heated in its passage 25 between the doors to the furnace. Valves may be fitted to the openings of the outer door for regulating the supply of air; and we do not confine ourselves to the details herein mentioned. LONDON: Printed by George Edward Eyre and William Spottiswoode, Printers to the Queen s most Excellent Majesty. 1857* i