Year: 1890

page_text: Fig. 4, is a plan of modified form of charging box.
Similar letters of reference indicate similar parts in all the views.
1, are the grate bars, which are attached to the side walls 2, in any suitable manner
such as by screwing or equivalent means. A space of sufficient width to admit the
charging box or tray 3, is left between the two lowest grate bars: the tray or box 3,
has a drop handle 4, and is supported by a light frame 4'.
A series of vertical guides 4", are mounted or cast upon the bottom of tray 3,
which consists of a plain iron sheet; perforations 5, are formed in its front and these
are sometimes closed by a removeable iron damper plate 6. Passing through the
sides 2, of the stove is a rod 7, to which on either side (or on one side only as shewn
in the drawing) is secured by nuts or equivalent means a right angular lever 8, the
short arm 8 of which is pivoted on either side to links 9, which are pivoted to
cams 10, these cams are keyed or similarly fastened to the shaft 11, passing through
the moveable plates 17, the side walls 2, and the internal distance piece 15b. Keyed
to shaft 11, within the side walls are two links 12, see dotted lines fig. 3, each having
a slot 13, within which the pins 14, attached on either side to the false bottom 15,
travels. This false bottom we generally form with a series of tongues 15", which pass
between vertical guides 4" forming the back of charging box 3. The false
bottom 15, slides upon an inner distance piece 15. Slots 16, are formed in the side
walls 2, and for the purpose of obtaining a vertical lift the cams 10, spindle 11,
internal links 12, are mounted upon external sliding plates 17, which are tied together
by rods 18, passing through slots 16, and the internal distance piece 15°, so that upon
pulling the lever 8, forward or backward the whole of the various parts described may
rise or fall together.
The full lines shew the position of the various outside parts and of the lever
actuating them when the stove is charged. The operation of charging is effected as
follows: First, lever 8, is pulled slightly forward and the links 12, see dotted lines
fig. 3, revolving with it draws forward the false bottom 15, which previous to this
occupied the position shewn in the rear of the stove. The tongues 15, are thereby
forced under the live fuel contained in charging box 3, which in this case has a closed
bottom. The bottom may however be open if desired. Each of the cams 10, have
two notches 19, 191, the upper notches 191, when the parts are in the position
shewn, rest (near to or upon as the case may be) stops 20, mounted upon or forming
Price 6d1

page_text: part of each external plate 17. By pulling the lever further forward, (see upper
dotted lines fig. 3, the notches 19, striking against the stops 20, lift the plates 17, and
internal distance piece 15° upon which the false bottom 15, with the live fuel
rests into the upper part of the grate and clear of the charging box or tray 3.
The false bottom is maintained in this position by 4 brakes 23, operated by set
screws 24, and springs 24¹, which bear against vertical strips formed upon front and
back of the distance piece 15. The charging box or tray 3, is now drawn out by the
drop handle 4, and filled with fresh fuel and replaced. When no charging box is
employed the fuel is fed into the void space under false bottom 15, a set of suitable fire
bars being mounted beneath the tongues. The lever 8, is now pushed backward and
the links 12, acting upon pins 14, in false bottom 15, force it back to its original
position in the rear of stove, by pushing the lever back into the vertical position the
false bottom 15, distance piece 15b, external plates 17, and the cams 10, mounted
thereon sink down to the original level. The incandescent fuel now rests upon that
newly charged; and the volatile products arising therefrom, are compelled to pass
through it on their way to flue 21. In so doing the carbonic acid is broken up by its
contact with the incandescent carbon of the live fuel into carbonic oxide. To facilitate
the complete combustion of this and the other products, air, is admitted through
openings 25, at the back and when convenient at the sides 26, the result being a clear
and nearly smokeless fire with the utilization of all the heat producing qualities of the
coal or other fuel.
We sometimes construct the charging box 3, as shown in fig. 4, wherein the sides
enter the space provided between the side walls 2, and vertical distance piece 15º,
which is made slightly higher for this purpose.
In the foregoing description we have shewn the arrangement we prefer to employ
for grates of the type shewn; but as our improvements are intended to apply to many
varying forms of stoves or grates we do not confine ourselves to the exact positions of
the various parts operating together indicated in the drawings as such would vary in
a measure dependent upon the form of stove to which it was applied. We are aware
that stoves and the like have been constructed for burning without smoke and waste
the gaseous products by passing such through an upper layer of incandescent fuel to
which air is admitted from behind or above. We lay no claim to such. The lower
part of the grate may be covered by an ornamental device which may be attached or
not to the block 30, left for this purpose. The stove or grate may also be fitted with
rollers 31, to facilitate its removal or replacement.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that we claim
1st. In an underfed stove or grate the particular construction arrangement and
operation of parts whereby the gases arising from the fresh fuel are compelled to pass
through a superincumbent layer of incandescent carbon for the purpose of converting
the carbonic acid into carbonic oxide and consuming the volatile products with
diminished smoke and waste substantially as herein described.
2nd. The combination in or with a stove grate or the like of the apparatus inter-
acting with a false bottom; which is first forced under the live fuel in the charging
box, then raised therewith to admit fresh fuel thereunder; and thereafter withdrawn
therefrom and lowered into its original position substantially in the way and manner
described under figs. 1, 2, 3..
Bid. The combination in or with an underfed stove grate or the like of a charging
box so constructed as that its sides enter recesses between the side walls, and the
distance piece as described under fig. 4.
FRANCIS M. ROGERS,
Agent.