Improvements in and relating to a Combination Forced Draught Furnace and Mechanical Stoker.
Year: 1898

page_text: Date of Application, 17th May, 1898
Complete Specification Left, 17th Feb., 1899-Accepted, 25th Mar., 1899
PROVISIONAL SPECIFICATION.
Improvements in and relating to a Combination Forced Draught
Furnace and Mechanical Stoker.
JAMES HENDERSON, Ironfounder, No. 1, Stonehaven Terrace, Stanley Road,
Wakefield, do hereby declare the nature of this invention to be as follows:-
The fixing of a small steam and air driven fan under the furnace bars and
driving from the shaft of fan by pulley & band, or chain, an upright shaft, from
which is driven another fan or fan shovel to distribute the fuel upon the fire bars,
and thereby obtain more perfect combustion and less smoke.
Dated this 16th day of May 1898.
Improvements in and relating to a Combination Forced Draught
Furnace and Mechanical Stoker.
T, JAMES HENDERSON, Ironfounder, of Stonehaven Terrace, Stanley Road, Wake-
field, 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:-
The object of my invention is to construct mechanical stokers with steam and
air driven fan motors or turbines, which are driven by steam from the boilers to
which they are attached, and so do not require overhead shafting; these are
placed preferably under the front of the firebars in a circular chamber, with closed
ash pit, with the exception of opening through which passes the steam and air
to drive the said fan motor, so creating a forced draught of steam and air combined
thereby obtaining more perfect combustion and less smoke.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation showing boiler with my invention applied to drive
stoker by means of fan or fans, which may for this purpose be named steam and
air turbine motors, afterward causing induced or forced draught.
Fig. 2 is an end elevation in section of Fig. 1.
A A are the steam and air driven fans or turbine motors, working within circular
or tubular chambers, and mounted upon shafts and having pulleys or chain wheels
thereon and ropes or chains passing over the double grooved pulley or chain
wheel B which in turn drives the vertical shaft C by preferably bevel gearing, the

page_text: vertical shaft C then drives cross shaft of the stoker by worm and worm wheel;
1) is a measuring feed roller for taking the fuel from the hopper and dropping it
into the fuel distributing chamber, E is the shovel, fan, or other fuel distributor, F
is a trip gear for causing the shovel to vary the lengths of its throw, G are the
springs which work in conjunction with the trip gear and shovel.
HH are the steam pipes from the boiler with nozzles and taps to supply and
regulate the steam from the boiler to drive the fans or turbine motors, which
both drives the stoker and provides induced or forced draught of steam and air
to the boiler furnace, giving more perfect combustion of fuel and consumption of
smoke.
.
Although I have shown my method of driving a mechanical stoker by means of
steam and air motors or fans I would have it understood that my motors may be
applied to any construction of mechanical stokers, and that the mechanical means
for driving from such motors to the cross shaft or to the shovel shaft of such
stokers may be varied without departing from the principle of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. Driving the mechanical stokers of steam boilers and supplying a forced
draught to the furnaces of same by means of steam and air motors or fans as
shown and described.
2. The steam and air motors or fans A A, placed below the furnace bars of the
boiler and operating the vertical shaft which in turn operates the cross shaft of
the stoker, and by suitable gear drives the shovel shaft as and for the purposes
substantially as shown and described.
1000
JOHN E. WALSH,
Waterhouse Chambers, Crossley Street, Halifax.
Patent Agent for the Applicant.