IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES
Year: 1877

page_text: LETTERS PATENT to Roger Jones, of Canning Town, in the County of Essex,
for the Invention of "IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES"
PROVISIONAL SPECIFICATION left by the said Roger Jones at the Office of
the Cominissioners of Patents on the 10th February 1877
ROGER JONES, of Canning Town, in the County of Essex.
STEAM BOILER AND OTHER FURNACES"
"IMPROVEMENTS IN
This Invention relates, first, to an improved method of forming, mounting, and
giving motion to the fire-bars of steam boiler and other furnaces
For this purpose the series of fire-bars of a furnace are made of one length from
the front to the back of the furnace The alternate bars are stationary, whilst the
intermediate bars have a to-and-fro motion imparted to them as follows -The front
ends of all the bars are supported upon a rocking bar, and in the centre upon a sta-
tionary bar, whilst the back ends of the bats are supported by a bearing bar near
the bridge The front end of each alternate fie-bar is formed with a series of teeth,
which gear or engage with a series of teeth formed at suitable distances apart on
the rocking bar, whilst the ends of the alternate stationary bars, having no teeth
thereon, rest on smooth surfaces between the teeth on the rocking bar, so that its
rocking motion does not act on the alternate stationary bars, which are kept sta-
tionary by lugs formed on the under side of the front dead plate, which prevents
them from moving forward, their backward movement being prevented by their
ends coming against the back bearing bar Projections on the central bearing bar
also take into a recess formed on the under side of the stationary bars, so as to keep
them at uniform distances apart to prevent them from moving sideways or to
and fro.
The back ends of the moveable bars are free to move into recesses formed in the
bridge of the furnace
The central bearing bar is capable of sliding to and fro on its bearings, so as to
admit of the fire-bars being introduced and withdrawn from their positions when
required
The front ends of the moveable bars are lower than the stationary bars to enable
them to pass to and fro under the front dead plate

page_text: A lever arm on the rocking bar is connected to a crank and axis by a connecting
rod, motion being given to the crank axis either by hand, or by a steam engine, or
other motive powel
The upper surfaces of the bars are formed partly with curved recesses and partly
smooth, to enable the clinkers when broken to be readily removed, and the ends of
the bars are enlarged in order to form spaces between them
Another part of my Invention relates to improvements in the arrangement and
construction of the fire-doors of furnaces for the purpose of regulating the admission
of air, and to facilitate the operation of raking the fire without opening the main
fire-door For this purpose the fire-door is formed with two distinct hollow
chambers, having a central passage which can be closed or opened by means of a
hollow slide moved to and fro by a lever or aim Air is adinitted through the slide
and though holes in the end of the door to the first hollow chamber, from which it
passes through holes or apertures into the second hollow chamber, and from thence.
through holes pierced at an angle into the furnace The jets of an as they pass into
the furnace impinge upon the angular sides of grooved recesses formed in the inner
surface of the fie-door
The aperture through the fire-door widens out into the furnace, so that the stoker
can move his slice or tool from side to side of the furnace as required
-A projecting rib is forined an ound the inner surface of the fire-door, which fits or 5
butts against the door frame, by which air is prevented from entering the furnace
around the door, which is also strengthened thereby
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Roger Jones in the Great Seal Patent Office on the 10th August
1877
ROGER JONES, of Canning Town, in the County of Essex
STEAM BOILER AND OTHER FURNACES"
"IMPROVEMENTS IN
This Invention relates, first, to an improved method of forming, mounting, and
giving motion to the file-bars of steam boiler and other furnaces
And in order that this part of my Invention may be clearly understood and
readily carried into practice, I will proceed to describe the same, reference being
made to the Drawings hereto annexed, and to the figures and letters markod
thereon
DESCRIPTION OF THE DRAWINGS
Figure 1 is part of a longitudinal section, and Figure 2 an end view of a steam
boiler furnace arranged and constructed in accordance with my Invention, Figures 3
and 4 are sections taken through the fire-door, and Figures 5 and 6 separate views
of part of two file-bars
According to my improvements the series of fine-bars of a furnace are made of
one length from the fi ont to the back of the furnace The alternate bars are sta-
tionary, whilst the intermediate bars have a to and-fio motion imparted to them as
follows-The front ends of the moveable bars u are supported upon a locking bai b,
and in the centre upon a stationary bar c, whilst the back ends of the bais are sup-
ported by a bearing bai near the bridge, not shown in the Drawing The front end
of each moveable fire-bar a is formed with a series of teeth a¹, which gear or engage
with a series of teeth b' formed at suitable distances apart on the locking bai ỗ,
whilst the ends of the alternate stationary bars, having no teeth thereon, rest on tho
smooth surfaces between the teeth on the rocking bat b, so that its rocking motion
does not act on the alternate stationary bais d, which are kept stationary by lugs
formed on the under side of the front dead plate e, which prevents them from 5
moving forward, their backard movement being prevented by their ends coming

page_text: against the back bearing bar, or the ends may be supported and kept fiee from the
rocking bar by a shelf or bar f, as shown in the Drawing Projections on the
central bearing bar c also take into a recess formed on the under side of the sta-
tionary bars d, so as to keep them at uniform distances apart to prevent them from
moving sideways or to and fro
The back ends of the moveable bars a are free to move into recesses formed in
the bridge of the furnace
The central bearing bar c is capable of sliding to and fro on its bearings, so as to
admit of the fire-bars being introduced and withdrawn from their positions when
required.
The front ends of the moveable bais a are lower than the stationary bars & to
enable them to pass to and fro under the front dead plate c
A lever arm h on the rocking bai bis connected to a lever arm k on the axis k¹
by a connecting rod 2, motion being given to the axis k¹ either by a hand lever h³,
as shown in the Diawings, or by a steam engine or other motive power
The upper surfaces of the bais are formed, as shown in the Diawings, paitly with
curved recesses and partly smooth, to enable the clinkers when broken to be readily
removed, and the ends of the bais are enlarged in order to form spaces between
them
I will now describe the second part of my Invention, which relates to improve-
ments in the airangement and construction of the file-doors of furnaces for the pur-
pose of regulating the admission of air, and to facilitate the operation of making the
fire without opening the main file-door For this purpose the fie-door is formed
with two distinct hollow chambers and m, having a central passage o, which can
be closed or opened by means of hollow slides p and q, moved to and fio by a lever
or aim p², one of which slides p is self-acting by means of the 1od p¹, for when the
fire-door is opened for coaling the arm p¹ is pressed against the front of the boiler
to the position shown in Figure 3, moving with it the slide p opposite the aper-
ture o, which allows the air to enter the fire-space, as shown by the arrows in
Figure 4 When sufficient air is admitted the slide q 18 moved opposite the
opening o by the projection q', allowing the air to enter the space m only
Holes or openings may be formed between the chamber and the interior of the
furnace
The aperture through the five-door widens out into the furnace, so that the stoker
can move his slice or tool from side to side of the furnace as required
A projecting rib is formed around the inner surface of the fie-door, which fits or
butts against the door frame, by which air is prevented from entering the furnace
around the door, which is also strengthened thereby
Having thus described the nature of my improvements and the manner of per-
forming or carrying the same into practice, I would remark that I do not claim any
of the parts separately which are well known and in common use, but what I
claim 15,
First The improved arrangement and construction of the fire-bars of steam
boiler and other furnaces, and in the method and apparatus for giving motion
thereto, substantially in the manner and for the purposes herein-before described
with reference to Figures 1, 2, 5, and 6 of the Drawings hereto annexed
Secondly I claim the improved arrangement and construction of the fire-doors of
steam boiler and other furnaces for the purpose of regulating the supply of air
thereto, substantially in the manner and for the purposes herein-before described
with reference to Figures 3 and 4 of the Drawings hereto annexed
In witness whereof, I, the said Roger Jones, have hereunto set my hand and
seal, this First day of August, in the year of our Lord One thousand eight
hundred and seventy-seven