Year: 1886

page_text: Date of Application, 4th Aug., 1886.
Complete Left, 3rd May, 1887.
Complete Accepted, 3rd June, 1887.
I JAMES PROCTOR of Hammerton Street Iron Works Burnley in the County of
Lancaster Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to that class of furnaces wherein moving fire bars are employed
to carry the fuel towards the bridge of the furnace, and refers more especially to the
arrangement for which I have applied for Letters Patent No. 7367 dated June 2nd
1886 the object of the invention being to prevent the burning of the ends of the fire
bars as well as the front of the bridge by the incandescent fuel as it is pushed off the
rear end of the bars.
Below the rear end of the fire bars I fix across the furnace a hollow cast iron
chamber or bearer, the forward end of which at the top is provided with a raised rim
or flange upon which the ends of the fire bars rest and slide to-and-fro. This chamber
is provided with a steam supply pipe, whereby it is always kept full of steam from the
boiler or other convenient source, and also with a steam exit pipe, or opening, or
openings leading into the ashpit in front of the bridge, so that a constant current of
steam can be caused to pass through the said chamber or bearer, and onto the burnt
ashes or refuse beneath.
This steam will keep the said bearer or chamber, and the ends of the bars com-
paratively cool, and will thereby prevent the burning away of the ends of the said
bars, and as the incandescent fuel is pushed off the bars over the hollow bearer, and
into the ashpit beneath, it will be partially cooled and prevented from burning the
front of the bridge, and thus the ends of the bars and the front of the bridge will last
much longer than they would otherwise do.
A swing door or damper is provided at the bottom of this steam chamber to admit of
the ashes &c. being cleared out when requisite.
11
ค
A1000
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improvement in Steam Boiler and other Furnaces.
I JAMES PROCTOR of Hammerton Street Iron Works Burnley in the County of
Lancaster 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 :-
This invention relates to that class of furnaces wherein moving fire bars are
employed to carry the fuel towards the bridge of the furnace, and refers more
especially to the arrangement for which I have applied for Letters Patent No. 7367,
dated June 2nd 1886, the object of the invention being to prevent the burning of the
ends of the fire bars as well as the front of the bridge by the incandescent fuel as it
is pushed off the rear end of the bars.
1
Such being the nature and object of my said invention I will now proceed to
describe in detail the manner in which the same is to be performed or carried into
practical effect, and in order that the same may be readily understood I have annexed
hereunto a sheet of drawings illustrative thereof, and have marked the same with
figures and letters of reference corresponding with those in the following explanation 1
thereof.
Fig. 1. on the annexed drawings is a longitudinal section of part of a boiler furnace
with my improvement shown as applied thereto, a, a being part of the front of the
boiler, b, 6 the flue, c, c the fire bridge and d, d the bars.
Below the rear end of the fire bars d, d I fix across the furnace a hollow cast iron
chamber or bearer e, e upon which the ends of the fire bars d, d rest and slide to-
and-fro.
This chamber or hollow bearer e, e is provided with a steam supply pipe f,ƒ (see
plan view Fig. 2) whereby it is always kept full of steam from the boiler or other
convenient source and also with a steam exit pipe with an opening or openings 2
leading into the ashpit in front of the bridge c, c so that a constant current of steam can
be caused to circulate through the said chamber or bearer and be discharged onto the
burnt ashes or refuse beneath.
Or I use the steam bearer e, e as a means of conveying steam to a pipe 9 g on the
opposite side of the flue to the supply pipe f, f, and the pipe 9 9 conveys the steam 3
to the front or to any other part of the ashpit that may be deemed convenient which it
joins another pipe h, h which extends across the flue beneath the bars and is perforated
so that small jets of steam are blown under and upon the lower side of the bars so as
to keep them cool.
This steam will keep the said bearer or chamber e, e and the ends and underside of 3
the bars d, d comparatively cool, and will thereby prevent the burning away of the
ends or other portions of the said bars, and as the incandescent fuel pushed off the

page_text: bars d, d over the hollow bearer e, e and into the ashpit beneath, it will be partially
cooled and prevented from burning the front of the bridge c, c, and thus the bars and
the front of the bridge will last much longer than they would otherwise do.
A swing door or damper ii is provided at the bottom of the steam chamber e, e to
admit of the ashes &c. being cleared out when requisite.
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 :-
The improvement in steam boiler and other furnaces consisting of a steam bearer
upon which the ends of the fire bars rest in combination with a steam supply pipe and
a perforated steam exit pipe discharging the steam in front of the bridge or beneath
the bars or both, substantially as hereinbefore described and illustrated by the drawings
annexed.