IMPROVEMENTS IN THE CONSTRUCTION OF FURNACE BARS AND MECHANICAL MOTION FOR WORKING THEM
Year: 1884

page_text: PROTIONAL DIECIFICATION.
I, JOSEPH KNOWLES BROADBENT of 27 West High Street, Salford in the
County of Lancaster, Engineer do hereby declare the nature of my Invention
for IMPROVEMENTS IN THE CONSTRUCTION OF FURNACE BARS AND MECHANICAL
MOTION FOR WORKING THEM to be as follows:-
:
My Invention consists of an improved method of constructing Fire Bars, for the
purpose of obtaining a more complete and uniform distribution of the air required
for combustion, and also to prevent portions of the fuel falling through before it is
thoroughly consumed.
In carrying out my improvements, I cast the Fire Bars in Groups, consisting of
two strong longitudinal Bars, joined together, by a large number of short cross
bars of fine pitch. And on the outside of the longitudinal Bars, I also cast short
teeth, or sections of the cross bars, the air spaces on the short teeth are made less
than the width of the tooth and by this means the Bars can be placed together in
a Furnace, without employing blank distance pieces, which are generally used in
the common construction of Fire Bars, thereby avoiding solid blauk places in the
Furnace where no air can be admitted.
Secondly. My Invention relates to those Fire Bars, which can be rocked to break
up Clinkers, and discharge Ashes, and thus keep the spaces in, and between the
Grate Bars open. This part of my Invention consists in forming the Grate Bars
with Pivots at each end. On the front end of the Bars there is cast a short
Lever, or Fulcrum with a slot. The Dead Plates are provided with slots, in which
the pivots of the Grate Bars rest. On the underside of the front Dead Plate, is
cast two Plumber Blocks or Pedestals, in each of these Plumber Blocks or Pedestals.
is inserted a round shank, terminating at one end in a short Lever; these shanks
are parallel to the axis of the Pivots, on which the Bars rock. One of. these
shanks is provided with a square which comes to the front, and is fitted with
socket key. The ends of the two Levers are connected by two pivots fixed in a
cross bar.
This Cross Bar also carries as many Pivots on its front side, as there are rocking
Bars in the Furnace. Each of these Pivots or Studs fit into the slot of the
Fulcrum cast with the Rocking Bar, and by means of the socket key or Lever, the
Bars can be rocked from side to side. By this arrangement the Bars can be taken
out changed or renewed if required, when the steam is up in the Boiler, without
disconnecting or disarranging any part of the rocking motion.
071
1 1001

page_text: I JOSEPH KNOWLES BROADBENT of 27 West High Street Salford Engineer do
hereby declare the nature of my invention for IMPROVEMENTS IN THE CONSTRUC-
TION OF FURNACE BARS AND MECHANICAL MOTION FOR WORKING THEM and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
Firstly. My invention consists of an Improved method of constructing Fire Bars
for the purpose of obtaining a more complete and uniform distribution of the Air
required for combustion and also to prevent portions of the Fuel falling through,
before it is thoroughly consumed. In carrying out my Improvements, I cast the Fire
Bars in groups, consisting of two strong longitudinal bars, joined together by a
large number of short cross bars of fine pitch. And on the outside of the longi-
tudinal Bars I also cast short teeth, or sections of the cross bars. The Air spaces
in the short teeth are mado less than the width of the tooth, and by this means the
Bars can be placed together in a Furnace, without employing blank distance pieces;
which are generally used in the_common construction of Fire Bars. Thereby
avoiding solid blank places in the Furnace where no air can be admitted.
Secondly. My Invention relates to those Fire Bars, which can be rocked to break
up clinkers and discharge ashes, and thus keep the spaces in and between the
Grate Bars open. This part of my Invention consists in forming the Grate Bars,
with Pivots at each end-On the front end of the Bars there is cast a short Lever
or Fulcrum with a Slot.
The Dead Plates are provided with Slots in which the Pivots of the Grate Bars
rest, On the underside of the Front Dead Plate is cast two Plumber Blocks or
Pedestals, in each of theso Plumber Blocks or Pedestals is inserted a round shank,
terminating at one end in a short Lever. These shanks are parallel to the axis of
the Pivots on which the Bars rock. One of these shanks is provided with a square
which comes to the front, and is fitted with a socket key. The ends of the two
Levers are connected by two pivots fixed in a cross bar. This cross bar also carries
as many pivots on the opposite side as there are rocking bars in the Furnace. Each
of these pivots or Studs fit into the Slot of the Fulcrum cast with the Rocking
Bar, and by means of the Socket key or Lever the Bars can be rocked from side to
side. By this arrangement the rocking bars can be taken out, and changed or
renewed if required without disconnecting, or disengaging any part of the Rocking.
Motion.
DESCRIPTION OF DRAWINGS.
Fig 1 Is a plan showing the strong Longitudinal Bars, the short Cross Bars,
and the short teeth on the outside.
Fig. 2 Is a sectional Elevation through the line A A shewing the Longitudinal
Bars and short Cross Bars.
•
Fig 3 Is a plan showing the Rocking Bars, Side Bars and Dead Plates.
Fig 4 Is a sectional end elevation through the line C. C.

page_text: or pedestals, cast on the front Dead Plates and are provided with caps and bolts,
x, x is the round shanks terminating at one end with a short Lever e which carries
the stud, H, and passes through the cross bar F at one end and is secured at the.
other end by means of a nut and pin. The cross Bar F carries as many studs H, H. HỒ
as there are rocking bars in the furnace.
M is the socket key, which by raising or lowering cause the bars C. C. C to
rock from side to side, and thus break up the Clinkers, and keep the Air spaces
open.
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
Firstly. The method of constructing Fire Bars in Groups, cast together, supported
on two strong Longitudinal Bars, with teeth on the outside, substantially as
berein before described and illustrated by the Drawings.
Secondly. The system or method of attaching the rocking motion to the front
Dead Plate, so as to rock the Bars, and allow them to be inserted or withdrawn
without uncoupling or detaching any part of the rocking motion, substantially as
herein before described and illustrated by the Drawings.
Dated this 22nd day of December 1884.