IMPROVEMENTS IN THE CONSTRUCTION & WORKING OF FURNACES, BAKERS' OVEN FIRE-PLACES, STOVES & STOVE GRATES, FOR THE PURPOSE OF IGNITING & CONSUMING SMOKE
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by William Henry Tooth at the
Office of the Commissioners of Patents, with his Petition, on the
5th November 1870.
I, WILLIAM HENRY TOOTH, of 2, Brooksbys Walk, Homerton, in the
County of Middlesex, Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION & WORKING OF FURNACES,
BAKERS' OVEN FIRE-PLACES, STOVES & STOVE GRATES, FOR THE PURPOSE OF IGNITING
& CONSUMING SMOKE," to be as follows:-
My improvements consist, first, in the construction of fire-bars to be
actuated by revolving crank or cam shafts for the purpose of feeding the
fires gradually so that the smoke and gases may be ignited as they are
distilled from the fuel. For this purpose I cause fire-bars to be con-
structed in such a manner that they can be actuated by crank pins or
cams turned out of solid shafts, or cast in the shafts if made of cast
iron, for the purpose of producing a parallel motion; or the shafts may
be made of wrought-iron bars & have fixed on to them cast or wrought-
iron cams. These shafts I cause to be fixed across the furnace at right
angles to the fire-bars; on to the end of each shaft I fix a worm or screw

page_text: fixed on to or cut out of a longitudinal shaft, and when motion is com-
municated to the shaft and cranks every alternate fire-bar will rise up &
push the fuel forward, and then recede whilst the next alternate bars come
forward & accomplish the same object, so that as one bar rises up &
pushes forward the other bar makes a down stroke & then returns with
an up stroke, breaking up the clinkers and at the same time feeding the
fire.
Secondly. I also cause jets of steam to play upon the working parts of
the cranks, cams, worms, & worm wheels, to keep them cool & prevent
them being affected by the heat.
The third part of my Invention consists, in constructing chambers in
connexion with the furnaces for the purpose of superheating steam, or
heating atmospheric air, or steam & air, in such a manner that it or they
may be brought to a temperature sufficient to ignite the smoke, and I cause
the said steam, or atmospheric air, or both to be injected over the fire in
such a way that they may come in contact & comingle with the smoke
& gases generated from the fuel. And this part of my Invention is
applicable to the igniting & consuming of smoke in bakers' oven fire-places,
stoves, & stove grates; and to carry out this object I cause the bakers' oven
firc-places, stoves & stove grates to be constructed, first, with an inner
chamber to contain the fuel, and secondly, with an outer chamber sur-
rounding the inner chamber, leaving a space between the two of any
shape or size required with appertures & doors to admit or shut out either
the steam, or atmospheric air, or both. I cause the fuel to be placed in
the inner chamber which can be raised at pleasure by means of a rack &
pinion attached to a platform or screw & nut affixed to said platform;
I then light the fuel which soon makes the case of the inner chamber
red hot, & causes great heat in the space between the inner & the outer
chamber; I then admit atmospheric air, or steam, or both into the space
between the two chambers, & convey it or them through suitable openings
on to the surface of the fuel, which effectually prevents any smoke from
arising without its being ignited.