Improvements in Furnace Grates.
Year: 1892

page_text: Date of Application, 7th Oct., 1892
Complete Specification Left, 16th June, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Furnace Grates.
I, WILHELM SAMUEL DOBBS, of No. 4, Neulinggasse, Vienna, Austria,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved construction of furnace grate wherein the
forward feed of the fuel on the grate, as also the clearing of the latter and the
removal of ashes and clinkers therefrom, is effected by means of a sliding grate in
combination with a fixed step-grate, which is arranged either with or without means
for cooling.
I will describe the said invention with reference to the accompanying drawings,
in which Figs. 1 to 9 shew an arrangement of the grate without cooling device,
while Fig. 1 to 9* shew an arrangement with cooling device.
Figs. 1 and 1 shew part plans and part sections on line A-B Figs. 2 and-2*.
Figs. 2 and 2x are sections on line C-D Figs. 3 and 3*.
Figs. 3 and 3* are part front elevations and part sections on line E-F Figs. 2
and 2x.
Figs. 4 and 4x to Figs. 9 and 9× shew detached details of the grates.
Figs. 4 and 4* are sections on line J-H, Figs. 5 and 5*.
Figs. 5 and 5* are sections on line L-M of Figs. 6 and 6*.
Figs. 6 and 6* are plans of the fixed grate a.
Figs. 7 and 7 are sections on line J K, Figs. 8 and 8*.
Figs. 8 and 8* are sections on line O-P, Figs. 9 and 9*.
Figs. 9 and 9* are plans of the moveable grate b.
The same letters indicate the same parts in all figures.
a is the fixed step-grate, 6 the sliding grate, c the bearers of the fixed step-grate,
which bearers serve, in the arrangement Figs. 1* to 9*, at the same time as
circulating channels for air or water for cooling the fixed step-grate; d are the
guide rails in which the bars of the sliding grate bare mounted; e are the inclined
planes on which the guide rails d together with the sliding grate slide to and fro;
f are antifriction rollers between the guide rails d and the inclined planes e in
Figs. 1 to 9; 9 are the distance bolts between the guide rails d Figs. 1 to 9; h is the
worm wheel for actuating the crank shaft in Figs. 1 to 9; h is the toothed segment
on the shaft i for actuating the sliding grate, in Figs. 1 to 9*; i is the crank shaft
for directly actuating the sliding grate in Figs. 1 to 9; in Figs. 1* to 9* i is the
shaft with toothed segments ; j, Figs. 1 to 9, is the worm for driving the worm
wheel h; j, in Figs. 1 to 9x, is the crank working the toothed segments h; k is the
cover plate, the feed hopper, m the upper flap, n Fig. 2, the lower flap, o the sight
hole, p the clearing door, g the front plate, s the fire bridge, t Fig. 2*, the main
bearer, u Fig. 2x the guide rod for lowering the inclined plane e, to allow of the
mounting of the sliding grate.
The main grate consists of the fixed step-bars a which are secured in step form
upon the bearers c. Between these fixed step-bars a slide backwards and forwards
the moveable grate bars b, which are mounted in the guide bars d, the motion being
limited to the width of the fixed grate bars a.
The movement of the bars 6 may either take place continuously, or at intervals,
according to requirements.
By means of this motion the coal is fed forward, the grate is cleared, and the
clinkers and ashes are pushed over the inner end of the grate. The motion of the
guide rail d, is effected in Figs. 1 to 9 by means of the crank shaft d, and in
Figs. 1 to 9x by the toothed segment h.
The cooling of the step-grate a is effected by the hollow bearers c, through which
air or water is made to circulate, it being then led off in any suitable manner.

page_text: On lighting the fire, the flap in Figs. 1 to 9 is turned into the vertical position,
the lower flap n serving as door, while in Figs. 1 to 9* the charging hopper l
constitutes the door. When the fire is lighted, the flaps are turned into the
positions shewn at Figs. 2 and 2x, and coal is filled into the feeding hopper, and the
sliding grate is then set in motion.
.
The actuating of the sliding grate may be effected either by a motor engine or
otherwise, according to circumstances, and the mechanism for this purpose may be
arranged in any convenient known manner.
When using liquite in large pieces as fuel, the grate should be inclined back-
wards, and the sliding grate should be placed in a lower position, in order that
slits may be formed between the fixed bars a and the sliding bars 6 for the admission
of air.
Dated this 7th day of October 1892.
ABEL & IMRAY,
Agents for the Applicant.
¡COMPLETE SPECIFICATION.
Improvements in Furnace Grates.
I, WILHELM SAMUEL DOBBS, of No. 4 Neulinggasse, Vienna, Austria,
Engineer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My invention relates to an improved construction of furnace grate wherein the
forward feed of the fuel on the grate as also the clearing of the latter and the
removal of ashes and clinkers therefrom is effected by means of a sliding grate in
combination with a fixed step grate.
I will describe the said invention with reference to Sheet 1 of the drawings
accompanying my Provisional Specification in which
Fig. 1 shews a part plan and a part section on line A-B Fig. 2.
Fig. 2 a section on line C-D Fig. 3.
Fig. 3 a part front elevation and part section on line E-F Fig. 2.
Figs. 4 to 9 shew detached details of the grates.
Fig. 4 is a section on line G-H Fig. 5.
Fig. 5 a section on line L-M of Fig. 6.
Fig. 6 a plan of the fixed grate a.
Fig. 7 a section on line J K Fig. 8.
Fig. 8 a section on line O-P Fig. 9.
Fig. 9 a plan of the moveable grate b.
In the accompanying additional drawings Fig. 10 is a plan and Fig. 11 a section
to an enlarged scale shewing the moveable parts of the grate in the one extreme
position. Figs. 12 and 13 being corresponding drawings shewing the parts in their
other extreme position.
The same letters indicate the same parts in all figures.
a is the fixed step grate. b the sliding grate. c the bearers of the fixed step-grate.
d are the guide rails in which the bars of the sliding grate b are mounted; e are
the inclined planes on which the guide rails d together with the sliding grate slide
to and fro; fare antifriction rollers between the guide rails d and the inclined
planes e; g are the distance bolts between the guide rails d; h is the worm wheel
'for actuating the crank shaft; i is the crank shaft for directly actuating the sliding
grate. is the worm for driving the worm wheel h; k is the cover plate, / the feed
hopper, m the upper flap, n Fig. the lower flap, o the sight hole, p the clearing
door, the front plate, the fire bridge.
The main grate consists of the fixed step-bars a which are secured in step form
upon the bearers c. Between these fixed step bars a slide backwards and forwards

page_text: the moveable grate bars b, which are mounted in the guide bars d, the motion being
limited to the width of the fixed grate bars a.
The movement of the bars 6 may either take place continuously, or at intervals,
according to requirements.
By means of this motion the coal is fed forward, the grate is cleared, and the
clinkers and ashes are pushed over the inner end of the grate. The motion of the
guide rail d is effected by means of the crank shaft i.
On lighting the fire, the flap m is turned into the vertical position, the lower
flap n serving as door. When the fire is lighted, the flaps are turned into the
positions shewn at Fig. 2 and coal is filled into the feeding hopper, and the sliding
grate is then set in motion.
The actuating of the sliding grate may be effected either by a motor engine or
otherwise, according to circumstances, and the mechanism for this purpose may be
arranged in any convenient known manner.
When using liquite in large pieces as fuel, the grate should be inclined back-
wards, and the sliding grate should be placed in a lower position iu order that slits
may be formed between the fixed bars a and the sliding bars for the admission
of air.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The combination of the step-grate a with the sliding grate b, which serves
both for feeding forward the fuel and for clearing the grate, substantially as
described.
Dad his T1000
ABEL & IMRAY,
Agents for the Applicant.