Specification of John William Sloughgrove and James Henry Wheatley : furnaces.

  • Sloughgrove, John William.
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John William Sloughgrove and James Henry Wheatley : furnaces. Source: Wellcome Collection.

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    Provisional Slough grove § Wheatleys Improvements in Smoke-Consuming Furnaces. ash-pit. The plate D is secured to the furnace bars B by the rod or lever E, so that when the grate is moved either up or down, by means of the lever the plate is likewise moved, and either opens or cuts off the communication between the ash-pit and the flue or chimney. As shown in the Drawing, the passage from the ash-pit to the flue is partly open, but may be completely 5 closed by depressing the lever attached to the bars B, which causes the front end of the bars to descend, and raises the plate D and also the bridge C until it touches the lower part of the boiler. The air necessary for the combustion of the fuel now passes up through the fuel at the front part of the furnace and through the incandescent fuel at the back of the grate. In passing through 10 the highly heated fuel, the combustible gases of the smoke are ignited, and the invisible vapours only escape by the chimney. The second part of our Invention is as followsThe furnace is fitted with two sets of fire bars, placed behind each other; between them is a space, in which a moveable screen or bridge is worked; the screen is made of two 15 perforated metal plates, the sides and top of the bridge being closed, and the bottom left open to admit a current of air between the plates. The shape of the screen or bridge will be made in accordance with the form of the furnace and boiler, and it is to be raised or lowered by means of a lever, a rack and pinion, a quadrant, or other mechanical arrangement. Another screen or £0 bridge, similar to the foregoing, is fitted at the end of the second set of fire bars, next the chimney shaft or flue; this screen may be worked by similar means to the other; or one screen may be actuated by a tube attached to the lever or rack, and the other by a rod fitted within the tube. These screens when raised form a double bridge, the fire burning in front of each. The fire nearest the flue 25 is supplied with fuel by lowering the front screen and pushing back a portion of the incandescent fuel from the outer fire; the screen or bridge is then raised. When coal is thrown upon the outer fire, the smoke and gaseous products arising from its combustion pass through the screen and over the second fire, 3 by which they are ignited and consumed. The object of the second screen is 30 to prevent the gaseous matters passing over the incandescent fuel too quickly and escaping into the chimney unconsumed. By the foregoing arrangement the visible and combustible gases are entirely consumed, the heated air and invisible vapour alone passing off by the chimney. In some cases the second screen or bridge will not be required, but we reserve the right to vary the 35 details of this Invention as required.