Improvements in Mechanical Stokers for Supplying Fuel to the Furnaces of Steam Boilers.
Year: 1887

page_text: Date of Application, 13th Jan., 1887
Complete Left, 24th Sept., 1887
Complete Accepted, 25th Oct., 1887
PROVISIONAL SPECIFICATION.
Improvements in Mechanical Stokers for Supplying Fuel to the
Furnaces of Steam Boilers.
I WILLIAM WHITTAKER of 38 Belvedere Road, Burnley, in the county of Lancaster,
Machinist do hereby declare the nature of this Invention to be as follows:-
My stoker is constructed as follows; I employ the ordinary hoppers, one or more,
for the reception of coal, in each hopper is a A incline or midfeather, and below the
incline are preferably two cylindrical feed rollers, or one feed roller may be used, to
feed the fuel to the shovel below; between each wing of the incline is a slide regu-
lator, which increases or decreases the space between each of the feed rollers, and the
bottom of each incline, and so regulates the supply of fuel to the feed rollers, the
rotary shovel box is formed with a central A shaped midfeather for guiding the coal
to the shovel or thrower, the front part of the midfeather will pull out, (and is
dispensed with when using large sized coal) the rotary shovel or shovels are preferably
upon one driving shaft, upon which is a worm, operating a worm wheel upon a stud
or shaft, on which is a disc with a stud working in a slot on a pivotted arm, this
pivotted arm carries a stud to which is attached a horizontal bar, rod, or slide, to
which it gives a backwards and forwards movement, this bar passes across the front
of the hoppers, and has a number of pauls or catches which engage with catch wheels
on the shafts of the feed rollers, arranged so that they work the feed rollers alternately,
and by turning back the catches, the feed rollers are stopped as required; one side
of the flue can be fed at once; this arrangement is applicable to one, two, three, or
other number of flued boilers.
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1007
JOHN E. WALSH,
8, Quality Court, London,
Agent for the Applicant.

page_text: CUBIFLETE SPECIFICATION.
Improvements in Mechanical Stokers for Supplying Fuel to the
Furnaces of Steam Boilers.
I WILLIAM WHITTAKER of 38 Belvedere Road, Burnley in the county of Lancaster
Machinist, do hereby declare the nature of this invention and in what mannor the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My stoker is constructed as follows, I employ the ordinary hoppers, one or more for
the reception of coal, in each hopper is a A incline or midfeather, and below the
incline are preferably two cylindrical feed rollers (or one feed roller may be used) to
feed the fuel to the shovel below, between each wing of the incline is a slide regulator
which increases or decreases the space between each of the feed rollers, and the bottom
of each incline, and so regulates the supply of fuel to the feed rollers; the rotary
shovel box is formed with a central A shaped midfeather or incline for guiding the
coal to the shovels.
The rotary shovel or shovels are preferably upon one driving shaft, upon which is
a worm operating a worm wheel upon a stud or shaft, on which shaft is a disc with a
stud working in a slot on a pivotted arm, this pivotted arm carries a stud to which is
attached a horizontal bar, rod, or slide, to which it gives a backwards and forwards
movement, this bar passes preferably across the front of the hoppers, and has a
number of pauls or catches which engage with catch wheels on the shaft of the feed
rollers, arranged so that they work the feed rollers alternately, and impart to them
a rotary or partial rotary motion, and by turning back the catches, the feed rollers
are stopped as required, one side of the flue can be fed at once.
This arrangement is applicable to one, two, three, or other number of flued
boilers.
The feed rollers may be either horizontal to the shovel shaft or at right angles to
the same.
One feed roller only to each flue niay be used.
Fig. 1 is a front elevation of my improved stoker applied to a three flued boiler.
Fig. 2 is a sectional elevation of Fig. 1, on the line X, Y, showing shovel box and
feed roller.
Fig. 3 is a front elevation of my improved stoker applied to a single flued boiler,
but with only one feed roller to each shovel.
Fig. is a front elevation showing my apparatus applied to a double flued boiler.
A are the hoppers for the reception of the coal (in the hoppers are suitable
A inclines N) below which are the feed rollers B, which also act as measuring rollers
to feed or measure the fuel to the rotary shovel or shovels B' below; on each feed
rolier is a ratchet wheel 0, operated by a ratchet D and bar or rod E, the circular

page_text: brackets keep the rod in position; G is a lever pivotted on a suitable bracket and
attached by a pin G to the rod E, and by a second stud or pin H, to the disc or
plate J upor the shaft J, operated by the worm wheel K and worm K' upon the
driving shaft L, which is driven by a strap and fast and loose pulley's M, from any
going part of the mill; a backwards and forwards motion is imparted to the bar or
rod E, which operates the feed rollers B alternately, by means of the ratchets D, and
ratchet wheels C, and imparts to the feed rollers a partial rotary movement by
turning back any one of the catches or ratchets its corresponding feed roller is
stopped without interfering with the working of the other feed rollers, so that one
flue can be stopped for cleaning purposes, while the other or others are working.
On each side or wing of the A inclines N, are regulating slides P, each attached
to levers R, by moving the levers R upwards or downwards in their slots S, they
increase or decrease the space between the feed rollers and the bottom of each incline,
and so allow a smaller or larger quantity of coal to pass to the feed roller or rollers
which supply the rotary shovel or shovels with fuel. The feed rollers are formed
with a space T, between their peripherys and the case or box in which they revolve,
and upon their peripherys are preferably formed projections or recess U, which
insure the feed being more positive, than if the rollers are plain upon their
peripherys.
The above arrangement can be equally applied to one or to any number of flued
boilers. When applied to a three flued boiler see Fig. 1 a suitable trough or trunk U₁
is employed to connect the feed rollers with the box of the rotary shovel which is
driven by a strap from the driving shaft of the top flues.
The feed rollers may be placed either at right angles to the driving shaft as shown
in the drawings, or they may be placed horizontal to the driving shaft.
Or in lieu of having two feed rollers to each flue one feed roller may be used
see Fig. 3 either to single, double, or any number of flued boilers.
The pivotted plate V may also be used in combination with my improved stoker
for regulating the throw and distribution of the fuel over the surface of the furnace,
by means of the screw W, which raises or lowers the plate V, and so regulates the
throw or distribution of the fuel.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, I declare that what I claim is :-
1. The general arrangement and construction of mechanical stokers for supplying
fuel to the furnaces of steam boilers or other furnaces, as herein shown and described.
2. Operating the feed rollers by the sliding bar, ratchets, and ratchet wheels, as and
for the purposes shown and described.
3. Regulating and adjusting the supply of fuel to the rotary shovels, by the
adjustable inclines and feed rollers as shown and described.
4. The use and employment of the adjustable inclines for the purposes shown and
described.
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