IMPROVE- MENTS IN FURNACE GRATES
Year: 1884

page_text: JAMES BURRELL Avonside Villa Cumberland Road Bristol County Somerset-
shire Marine Engineer do hereby declare the nature of my invention for IMPROVE-
MENTS IN FURNACE GRATES to be as follows:-
This invention is for the purpose of easily removing the refuse ashes clinker
slate and foriegn and incombustiable matter from the fire chamber in or under
boilers forges furnaces etc, so as to insure complete combustion by reason of an
absolute clean fire surface It is made thus a series of shafts are fixed in a frame
at each end, the shaft is made ether square or round with a projection on it on the
shaft is fixed a series of plates or bars ether of an oblong or triangler form to
act as fire bars the plates have a hole in the centre and a bos on one or both sides
to regulate the distance apart also to make them fast on the shaft the plates are so
fixed as to allow the plates on the shaft next to it to pass between them. At one
end of the shafts is fixed geared wheels so as by the turning of one shaft will cause
the turning of one or more of. the other shafts and plates. On the shaft is also
fixed a disk with flat parts or it so arranged that the fire door cannot be opned
or closed untill the plates are all in a strieght line. By the side of each set of shafts
and plates is fixed a bar having projections on it, the projections to be so arranged
as to allow the plates on the shaft to pass between them for the purpose of cleaning
them, the shafts can be made hollow to allow ether water or air to pass through.
Dated this 18th day of July 1884

page_text: JAMES BURRELL Avonside Villa Cumberland Road Bristol County of Somerset-
shire Marine Engineer do hereby declare the nature of my invention for IMPROVE-
MENTS IN FURNACE GRATES and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:—
The object of my invention is to provide for the easy removal of ashes, clinker,
slate and other incombustible matter from the fire chamber in or under boilers,
forges, and furnaces, so as to ensure an absolutely clean fire surface and consequently
complete combustion.
The invention consists in a Series of rotating shafts provided with plates or bars
and fitted in pairs to work between fixed bar as hereafter described and claimed.
References etc to Drawings two Sheets.
Fig. 1 is a front elevation of the fire box shewing the fire door and the ends
of grate bars.
Fig. 1° is a front elevation of the end of grate shewing shafts geared together.
Fig. 2. is a plan view, partly sectional of a grate embodying my invention.
Fig. 3. is.side view of rotating shaft & bars.
Fig. 4. is an end view of plates or bars at j.
Fig. 5. is an end view of centre bar.at j.
Fig. 6 is an end view of side bar at j.
M. represents the front of the fire box provided with a door K. as usual, C. C. are
the front and back bearers or girders supporting the grate bars, In the bearers C. C.
are supported shafts DA that may be of either round or angular form and on these
shafts are fixed the plates or bars D that may be of either oblong, triangular, or
square form, Between the plates or bars D are bosses or collars, b to retain the
bars, the proper distance apart, in some cases the cross bars D and the shafts may
be cast together in one or more pieces, Between the shafts AA and bars D on each
side are the fixed bars E, which are formed with side projecting arms or bars that
intermesh with the bars D upon the shafts, the plates or bars on the shafts also
intermesh with each other, The plates and cross bars together form the grate
surface, and it is to be understood that there may be any number of shafts as
required, The ends of the shafts A project at the front of the fire box and are
geared together in pairs by geared wheels H, one shaft of each pair is formed for
receiving a handle which is provided.with a pawl or ratchet for engaging the teeth
of one of the gear wheels H so that the handle can be used for turning the shafts,
upon the end of the other shaft of each pair is a disc with flat parts on it or an
oblong plate G which extends in the direction corresponding to the bars D so that
when the grate bars are in any other position except level the plate G will project
in front of the fire door K. and thus prevent the opening of the door until the
grate bars are brought to the level, the plate G thus serving as an indicator or
guide to prevent the grate bars from been left out of level, By the turning of the
shafts A. and plates D. and thus reversing the position of the grate bars the ashes,.
clinker and other combustible matter are carried or allowed to drop through to the
ash pan and in that manner the fire can be kept clear at all times and perfect
combustion insured.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1st A furnace grate consisting of the rotating shafts A provided with cross
bars D and the intermediate fixed bars E combined substantially as described.

page_text: 2nd In a grate the rotating shaft A provided with the bars D and coupled
together in pairs substantially as and for the purpose specified.
3rd In a grate the combination of the plates G with the rotating shafts A and fire
door K. substantially as and for the purpose specified.
Dated this 13th day of November 1884.
JAMES BURRELL,