Year: 1897

page_text: Date of Application, 27th Apr., 1897-Accepted, 26th June, 1897
Figure 1 is a front elevation.
Figure 2, a vertical transverse section; and
Figure 3, a vertical longitudinal section of a furnace embodying my improved
features.
A is a frame or boiler-front; A¹ the inclosing side-walls; A' the front end-wall;
A³ the rear or back end-wall; A' the top or roof; B the combustion-chamber;
and B' the fuel-chamber.
A hollow cylinder or body, C, is located in, and extends longitudinally through,
the combustion-chamber; the respective ends thereof being supported in the front
and back walls, as shown in Fig. 3. This body is closed at the front end and open
at the rear or discharge-end. This cylindrical body C partly separates or divides.
the combustion-chamber from the fuel-chamber, leaving the communicating-passages
or spaces, a, (Fig. 2.) at each side between the exterior heat-collecting cylinder and
the inclined grate-bars, D, for the fuel to pass or gravitate into the combustion-
chamber.
The cylinder
is provided in the sides with a number of openings, a', disposed.
at intervals, and in the underside with the longitudinal openings, a*, extending from
end to end. This continuous opening forms a passage for the heated air to enter
the cylinder or chambered body, and also provides for the escape of any particles of
fuel and ashes that may pass in through the openings in the sides.
The heat-collecting cylinder will, ordinarily, be composed of fire-clay, and the
same principle of construction employed as that followed in the manufacture of
retorts of the same material.
One of the particular advantages is, that the fuel surrounding the cylinder is
always in an incandescent state, so that the heated air entering therein and
conducted therethrough is of a very high temperature and uniformly continuous, so
that no cold air from the ash-pit enters and commingles therewith; thus being
productive of the best possible results.
Under the ordinary furnace arrangement the conditions are such that there are
portions of the grate-bars not covered with fuel, leaving openings for the admission
of atmospheric air, which mingles with and lowers the temperature of the heated
air discharged from the combustion-chamber.
Neither can the process of
combustion be as perfect nor as economical as that of the furnace shown.
The arrows below the grate-bars and in the ash-pit indicate the flow of
atmospheric air on its way to the combustion-chamber; the arrows in the chamber
indicating the flow of the heat-gases into the cylinder through the various openings,
and passing out through the rear open end, as illustrated in Fig. 3.

page_text: The cylindrical chambered body, C, receives and concentrates the heat-gases
as they are generated, and continues and promotes the complete and final
decomposition and combustion of such as are inflamable and still unconsumed,
and then discharges them through the open end on their way to the point of
practical application.
The series of inclined grate-bars present, on their front side, a surface that is
slightly concave, so as to conform somewhat to the spherical sides of the cylinder,
whereby the fuel will be much less liable to clog or stick in the passages forming
the communication between the fuel and combustion-chamber; thus insuring a
continuous and uniform feed.
The upper ends of the inclined grate-bars are movably secured in place by two
hars, a³, and a number of bolts, at, extending through the inclosing side-walls.
The lower ends of these grate-bars (Fig. 2.) are provided with a notch, b, engaging
with a rib, 61, formed on the longitudinal horizontal bars, 63. The bars, 62, are
supported loosely on the stationary plates E. The inner ends of a number of
adjusting-rods, d, are connected to the horizontal bars, 62. These rods extend
through the side-walls; the outer ends extending through brackets, d¹, and being
screw-threaded for the engagement of the locking-outs, d d³, as shown in
Fig. 2.
By this means the inclination of the grate-bars may be varied, and the
fuel-passage between the bars and cylinder widened or narrowed as the character of
the fuel, or other circumstances, require, for the base may be readily moved in or
out and set at any desired point through the medium of the rods d.
The rocking grate-bars, F, are located in the contracted space between the
stationary plates E so that when these bars are dumped to discharge the accumu-
lation of ashes but a small surface is agitated, and the uniform feed of the fuel not
varied.
The fuel-chamber is ordinarily charged from the top; the fuel gradually
gravitating into the passages leading to the combustion-chamber, whereby the
process of combustion is continuous with the best possible results, as all the beat-
producing power of the fuel is extracted, and no gases liberated to escape into the
atmosphere.
The doors, G, afford access to the fuel-chamber. The smaller doors, g, open in
at a point opposite the passage leading from the fuel in the combustion-chamber.
H represents the usual furnace-doors, and the doors opening into the ash-pit.
It will be understood that the heat-collecting cylinder may be constructed of any
material other than fire-clay that is found to be the most suitable for the purpose.
Neither will the cylindrical form be strictly adhered to, as it is obvious that it may
be of any desired shape in cross-section.
The side-openings in the heat-collecting hody may be omitted and the entire
volume of heat-gases made to enter through the opening in the bottom. This will
be governed by the particular application, as in some instances the side-openings
will be necessary, while in other instances they may be entirely dispensed with.
Neither do confine or limit myself to the precise construction and general
arrangement shown, but may make such changes as ordinarily come within
the scope of the skilled mechanic, or that the particular practical application may
require, without departing from the spirit of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manuer the same is to be performed, I declare that what I
claim, is-
1. In a furnace, the combination with a combustion-chamber, of a heat-collecting
cylinder, extending longitudinally thereof and having a lengthwise draft opening
through its bottom.
2. In a furnace, the combination with fuel and combustion-chambers, located in
different horizontal planes, of a heat-collecting cylinder, located in and partly
dividing said chambers.

page_text: 3. In a furnace, the combination with fuel and combustion-chambers, of a heat-
collecting cylinder, having an opening in the bottom thereof, and the inclined
grate-bars, leading from the fuel-chamber to the combustion-chamber, past and
adjacent to the sides of the cylinder.
4. In a furnace, the combination with fuel and combustion-chambers, of a heat-
collecting cylinder, having openings in the sides, and inclined grate-bars, leading
past and adjacent to the sides of the cylinder.
5. In a furnace, the combination with fuel and combustion-chambers, of a heat-
collecting cylinder, having perforated sides and a lengthwise opening in the bottom,.
and inclined grate-bars, leading from the fuel to the combustion-chamber past and
adjacent to the sides of the cylinder.
6. In a furnace, the combination with a fuel and combustion-chamber, of a
beat-collecting cylinder, extending longitudinally therethrough and providing a
space on each side thereof for the passage of the fuel downwardly into the-
combustion-chamber, the body of the fuel resting above said cylinder, which is
provided with an opening in the underside extending from end to end and having
openings in the respective sides, the heat entering said cylinder through the
respective openings, and being discharged therefrom at the rear end, substantially
as set forth.
7. In a furnace the combination with, a fuel-chamber and a combustion-chamber
common to each other, of a heat-collecting cylinder inserted longitudinally there--
through and having openings therein, the inclined grate-bars located at each side
of said cylinder and leaving narrowed passages between said fuel and combustion-
chambers, substantially as set forth.
8. In a furnace the combination with, a combustion-chamber and fuel-chamber
common to each other, of a heat-collecting cylinder, inserted longitudinally
therethrough and partly dividing said chambers, the inclined grate-bars, and the
horizontal rocking-bars, substantially as set forth.
9. In a furnace the combination with, the heat-collecting cylinder, having
openings therein, of the series of inclined grate-bars, the longitudinal bars,
supporting the lower ends of the inclined grate-bars, the stationary angle-plates,
and the adjusting-rods, secured at their inner ends to said longitudinal bars,.
whereby the inclined grate-bars may be adjusted to widen or narrow the passages.
between the fuel and combustion-chambers, substantially as set forth.
Dated this 8th day of Anril 1007
JESSE TUTTLE GREENE.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant..