and in Feeding Fuel thereon.
Year: 1885

page_text: and in Feeding Fuel thereon.
We TOM MILBURN and CHARLES WILLIAM HAYDON of the firm of William
Milburn and Sons of the Britannia Foundry, Staleybridge in the County of
Lancaster Iron Founders and EDWARD MUNDY in the employment of the said
firm Mechanic do hereby declare the nature of this Invention to be as follows:-
Our Invention relates principally to the furnaces of steam generators but is also
applicable to other furnaces for generating heat. In some constructions of furnace
the fuel is conveyed from the front toward the back of the furnace by movements
imparted to the bars by means of revolving shafts. In our Invention we impart
endwise movement to the bars by means of stepped rocking levers which move
all the bars together toward the back of the furnace but bring them back in
divisions the bars moving together not being contiguous as for example the
alternate bars or every third or fourth bar may move in unison the effect being
to check return movement of the fuel. The employment of the rocking levers
enables us to reduce friction and to vary the extent of movement of the bars.
The levers may be cast or formed in one piece or in clusters or in separate pieces
secured upon one shaft or upon shafts or fastened together. The rocking lever
or levers may be actuated by power or be moved at intervals by hand. When
actuated by power a connecting rod receiving motion from a crank or excentric
may impart movement to a lever upon the combination of levers which act upon
the bars. To facilitate the movement of the bars we mount them upon rollers
which themselves roll upon bearers or surfaces so that the movements of the bars
are effected with a minimum of friction. Openings or slots may be made in the
said bearers to prevent accumulation of ashes projections preventing the rollers
from passing off. To break up and push forward the fuel from the front end
of the grate we form the front ends of the bars with steps or stepped projections.
To feed the fuel we employ a revolving feeder which is formed or provided with
radial vanes the spaces between these vanes forming trough-like cells which as the
feed revolves measure the fuel and deliver it to the grate below, the feed being
regulated by varying the speed of revolution of the feeder.
A..נ.י.ת
Ontahan 100K

page_text: Improvements in Forming, Mounting, and Actuating Fire Bars,
and in Feeding Fuel thereon...
We TOM MILBURN and CHARLES WILLIAM HAYDON of the firm of William
Milburn and Sons of the Britannia Foundry, Staleybridge in the County of
Lancaster, Iron. Founders and EDWARD MUNDY in the employment of the said
firm Mechanic 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 and accompanying drawings:—
Our Invention relates principally to the furnaces of steam generators but is also
applicable to other furnaces for generating heat. In some constructions of furnace
the fuel is conveyed from the front toward the back of the furnace by movements
imparted to the bars by means of revolving shafts. In our Invention we impart
endwise movement to the bars by means of stepped rocking levers which move
all the bars together toward the back of the furnace but bring them back in
divisions the bars moving together not being contiguous as for example the
alternate bars or every third or fourth bar may move in unison the effect being
to check return movement of the fuel. To facilitate the movement of the bars
we mount them upon rollers which themselves roll upon bearers or surfaces so that
the movements of the bars are effected with a minimum of friction. Openings or
slots may be made in the said bearings to prevent accumulation of ashes projections
preventing the rollers from passing off. To break up and push forward the fuel
from the front end of the grate we form the front ends of the bars with steps
or stepped projections. To feed the fuel we employ a revolving feeder which
as it revolves measures the fuel and delivers it to the grate below.
Our Invention will be best understood when described with reference to the
accompanying drawings. In the said drawings Figs. 1 and 2 are side elevations
illustrating the action of the parts which give motion to the bars. Fig. 3 is a
plan of the stepped lever which actuates each set of three bars. Fig. 4 is a
detached view of one of the rollers upon which the bars are mounted. Fig. 5
illustrates the revolving feeder. In Figs. 1 and 2 a is one of the bars b. is one
of the aforesaid rocking levers and c. is a moveable stop.
In the example the bars constituting the grate are supposed to be arranged in
sets of three the third bar in each set being actuated by means of a rocking stepped
lever b. represented in plan by Fig. 3. The levers which actuate the whole of the
bars are threaded upon a rocking shaft d. which is mounted in suitable bearings
and is caused to rock or to vibrate to and fro. The said shaft may be actuated by
power or be moved at intervals by hand as preferred. Each lever is formed on
one side with a broad face b¹ which when the lever moves in the direction
indicated by the arrow in Fig. 1 bears upon the part 1 of the bars and pushes
all three bars inward simultaneously whereby the fuel is carried forward in the
furnace. On the other side the lever is formed with three steps 62, 63, and 6*
shown in plan at Fig. 3 and which act upon the projecting part 2 of each bar

page_text: to push the bar outward the three steps acting in succession so that the three bars
in a set are pushed out in succession only one bar in a set moving at one time.
In Fig. 1 the lever is represented in the position assumed at the end of its
movement in the direction indicated by the arrow. When the lever moves in
the direction indicated in Fig. 2 the step 6 first comes in contact with one of the
bars and such bar is pushed outward for a short distance. When the said step
clears and passes below the projection 2. of the bar as indicated in the case of the
bar al in Fig. 2 the said bar ceases to move and the step b³ of the bar then acts
upon another bar in the set and when that bar has been moved outward the third
bar is pushed outward by the step b. The levers then move in the direction
indicated by the arrow in Fig. 1 and push in all the bars simultaneously. In
order to prevent the bars in a set of three or any two of them from moving
outwardly together from any cause a moveable stop c. is loosely mounted upon
a collar e. which is threaded upon the shaft d. there being one such stop to every
stepped lever. A projection 3. on each of the two bars being the second and the
third in rotation to move outwardly comes into contact with this stop if either
bar begins to move before its time. The said stop is formed with two steps 2
and 3. When the lever b. moves in the direction indicated in Fig. 2 the stop is
carried with the lever. When the first bar has been moved out the step 2. on the
stop will have been carried out of the way of the projection 3. on the second bar
and such bar is then free to be moved outward. The employment of the rocking
levers enables us to reduce friction and to vary the extent of the movement of the
bars. A separately formed lever may act upon each bar instead of the levers
being cast or formed in clusters or being stepped as in the example. We do not
confine ourselves to the arrangement of the bars in sets of three as we may have
only two or more than three in a set. Fig. 4 illustrates the improved method of
mounting the bars. Each bar is mounted upon two three or more rollers or
wheels f. Each roller rests upon a bearer g. upon which it is free to roll within
limits. It will be seen that the bar will move with little friction in consequence
of the supporting roller or wheel rolling upon the supporting bearer instead of
revolving upon a pin. We prefer to adapt the rollers to roll upon vee" edged
bearers to prevent the accumulation of ashes upon such bearers the edges of the
bars in contact with the rollers being shaped to correspond. The front ends of
the bars are formed with stepped projections h. h. which act to break up the fuel
and to push it forward toward the back of the grate when the bars are moved
inward. Our improved fuel feeder is illustrated by Fig. 5. The said feeder is
formed with vanes i. i. and is arranged to revolve within a cylindrical casing k.
above which is the hopper containing the fuel. As the feeder revolves the cells
or spaces between the vanes become filled with fuel which by the revolution
of the feeder is emptied on to the bars below. By increasing or decreasing the
speed of revolution of the feeder the delivery of fuel can be increased or decreased.
<
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is,
1. The vibrating stepped lever b. substantially as and for the purpose set forth
and indicated.
2. In furnaces having moveable bars the use of rocking or vibrating levers
adapted to move the bars inward together when moving in one direction and
to move the bars in each set of two or more outward singly and in succession
when moving in the other direction substantially as and for the purpose set
forth and indicated.
3. The combination of the bars a. with the actuating levers b. substantially as
set forth with reference to the accompanying drawings.
4. The rollers f. mounted to roll upon bearers and supporting the bars of a
furnace substantially as set forth and indicated.

page_text: 5. The stepped formation of the bars substantially as and for the purpose set
forth and indicated herein before with reference to the parts marked h. h. in the
accompanying drawings. "
6. The revolving fuel feeder formed with cells to measure and feed forward
or downward the fuel substantially as set forth and indicated with reference
to Fig. 5 of the accompanying drawings.