IMPROVEMENTS IN FURNACE OR FIRE-BARS, AND IN MOUNTING AND GIVING MOTION TO THE SAME
Year: 1864

page_text: LETTERS PATENT to William Arena Martin and Edward Wylam, both of
No. 18, Cannon Street, in the City of London, for the Invention of
"IMPROVEMENTS IN FURNACE OR FIRE-BARS, AND IN MOUNTING AND GIVING
MOTION TO THE SAME."
Sealed the 16th September 1864, and dated the 21st March 1864.
PROVISIONAL SPECIFICATION :left by the said William Arena Martin
and Edward Wylam at the Office of the Commissioners of Patents,
with their Petition, on the 21st March 1864.
We, WILLIAM ARENA MARTIN and EDWARD WYLAM, both of No. 18,
Cannon Street, in the City of London, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN FURNACE OR FIRE-BARS, AND IN MOUNTING
AND GIVING MOTION TO THE SAME," to be as follows:-
Our Invention relates to an improved construction of fire-bars and their
mountings for the furnaces of boilers for marine, locomotive, and stationary
engines, and for other purposes for which such fire-bars are or may be used,
so that they shall thereby become durable in a greater degree than can be
attained by the present construction of such bars, and whereby also a part or
portion of each or. any bar may be removed when worn, and replaced by a
corresponding new part or portion instead of having to replace the whole bar
as has heretofore been necessary.

page_text: Our improvements relate further to the constructing and mounting of our
improved bars in some cases in such manner that we may thereby with facility
trip them for the purpose of quickly and readily removing the contents of the
furnaces to which they are applied.
Our improvements consist, firstly, in constructing furnace or fire-bars in two
parts, an upper or wearing part, and a lower or bearing part for carrying the
upper or wearing part and retaining the same in its proper position. We
construct our improved bars in such manner that the upper or wearing surface,
that next in contact with the fuel, shall be of wrought iron or steel, while the
lower or bearing portion may be of cast or wrought iron. This we do by
constructing two bars, one of cast or wrought iron for the lower or bearing bar,
and the other or upper bar either of wrought iron or of steel, and mounting
and securing the wrought-iron or steel bar upon the cast or wrought iron one
in such a way that it shall not shift its position thereupon, as, for example, by
casting or making the lower bar with or attaching thereto lugs, straps, or side
pieces, or by casting or making the whole of the upper surface or only a
portion thereof in a U, gutter-shaped, or other convenient form, so that the
upper bar of wrought iron or steel may rest thereon, due care being taken in
all cases to allow for the alternate expansion and contraction of the materials
employed.
We propose to apply our Invention also to either moving or rocking bars,
and we do so by reducing the depth of such bars as at present constructed to
about one-half, or to such dimensions as shall not interfere with the gearing
for producing the rocking or otherwise moving of the said bars; or we
construct new bars of about the same or similar proportions as the said reduced
bars, and in either case place upon their upper surfaces bars of wrought iron
or steel of the section that may be found most suitable. We propose to
attach to the lower bar of cast or wrought iron lugs or side pieces or plates
having holes in them to receive rivets, so that upon the upper bars of wrought
iron or steel being placed in their proper position upon the lower bars the
rivets will fasten or hold both bars securely together.
When we apply our Invention to moving bars we do so by preference to
rocking bars constructed under Her Majesty's Royal Letters Patent, bearing
date the 28th of September A.D. 1860, No. 2351.
We propose also in some cases to make the lower bars with holes, which
will form air spaces to break contact, and at the same time allow of the
unequal expansion of the cast and wrought iron or steel without causing injury
to either.
Our improvements consist, secondly, in casting or making the lower or

page_text: bearing bars in some cases with a recess or transverse groove at or near to their
centres or near to either end of the bars on their bottom or under sides, or
with a square hole in or about the same relative positions as the recesses or
grooves. These recesses, transverse grooves, or holes, are so placed that upon
each set of bars being placed in position in the furnace, a bolt or shaft may
be placed under or through the entire set, so as to support it, the said bolt or
shaft resting in bearings in the sides or walls of the furnaces. When it is
desired to trip the bars so as to deliver the contents of the furnace at the
bottom or mouth of the ash-pit, the bolt can be withdrawn. Or when the
bars are supported centrically, a crank handle can be attached to the shaft
on which the bars rest, and they can by means of this arrangement be either
tripped or rocked as may be desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Arena Martin and Edward Wylam in the Great
Seal Patent Office on the 19th September 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
ARENA MARTIN and EDWARD WYLAM, both of No. 18, Cannon Street, in the
City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of March, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said William Arena Martin and Edward Wylam, Her special licence that we,
the said William Arena Martin and Edward Wylam, our executors, adminis-
trators, and assigns, or such others as we, the said William Arena Martin and
Edward Wylam, our executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
FURNACE OR FIRE-BARS, AND IN MOUNTING AND GIVING MOTION TO THE SAME,” upon
the condition (amongst others) that we, the said William Arena Martin, and
Edward Wylam, our executors or administrators, by an instrument in writing
under our, or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention,-and-in what-manner the same
was to be performed, and cause the same to be filed in the Great-Seal Patent

page_text: Office within six calendar months next and immediately after the date of the
said Letters Patent.
NOW KNOW YE, that we, the said William Arena Martin and Edward
Wylam, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
Our Invention relates to an improved construction of fire-bars for the
furnaces of boilers for marine, locomotive, and stationary engines, and for
other purposes for which such fire-bars are or may be used, so that they shall
thereby become durable in a greater degree than can be attained by the
present construction of such bars, and whereby also a part or portion of each
or any bar may be removed when worn, and replaced by a corresponding new
part or portion instead of having to replace the whole bar, as has heretofore
been necessary.
Our improvements relate further to the constructing and mounting of our
improved bars in some cases in such manner that we may thereby with
facility trip them for the purpose of quickly and readily removing the
contents of the furnaces to which they are applied.
In order that the nature of our said Invention, and the means by which the
same is effected, may be more particularly ascertained and described, we to
this Specification append a Sheet of Drawings having figures and letters of
reference marked thereupon, corresponding letters being used to denote the
like parts in each Figure.
Reference being made to these Drawings it will be seen that our
improvements consist, firstly, in constructing furnace or fire-bars in two parts,
an upper or wearing part a, a, a, and a lower or bearing part b, b, b, for
carrying the upper or wearing part, and retaining the same in its proper
position. We construct our improved bars in such manner that the upper
or wearing surface a, a, a, that next in contact with the fuel, shall be of
wrought iron or steel, while the lower or bearing portion b, b, b, may be of
cast or wrought iron. This we do by constructing two bars, one of cast or
wrought iron for the lower or bearing bar, and the other or upper bar either
of wrought iron or of steel, and mounting and securing the wrought iron or
steel bar upon the cast or wrought iron one in such a way that it shall not
shift its position thereupon, as for example, by casting or making the lower
bar with or attaching thereto lugs, straps, or side pieces (c, c, c, in Figures 2
and 3), or by casting or making the whole of the upper surface or only a
portion thereof in a U, gutter-shaped, or other convenient form, so that the
upper bar of wrought iron or steel may rest thereon, due care being taken in

page_text: all cases to allow for the alternate expansion and contraction of the materials
employed. Figure 1 in the Drawings shews a fire-bar constructed in two
parts or portions, as herein-before described.
We propose to apply our Invention also to either moving or rocking bars,
and we do so by reducing the depth of such bars as at present constructed to
about one-half, or to such dimensions as shall not interfere with the gearing
for producing the rocking or otherwise moving of the said bars; or we construct
new bars of about the same or similar proportions as the said reduced bars,
and in either case place upon their upper surfaces bars (Figure 2, a, a, a,) of
wrought iron or steel of the section that may be found most suitable. We
propose to attach to the lower bar b, b, b, of cast or wrought iron lugs or side
pieces c, c, c, or plates d, d, d, having holes in them to receive rivets, so that
upon the upper bars of wrought iron or steel being placed in their proper
position upon the lower bars the rivets will fasten or hold both bars securely
together.
When we apply our Invention to moving bars we do so by preference to
rocking bars constructed under Her Majesty's Royal Letters Patent, bearing
date the Twenty-eighth of September, in the year of our Lord One thousand
eight hundred and sixty, No. 2851, and it is a bar of this description with
our present improvements applied thereto which is shown in Figure 2 in the
Drawings.
We propose also in some cases to make the lower bar with holes, which
will form air spaces, to break contact, and at the same time allow of the
unequal expansion of the cast and wrought iron or steel without causing
injury to either; the manner in which this may be done is denoted by the
letters e, e, e, in the Drawings accompanying this Specification.
Our improvements consist, secondly, in casting or making the lower or
bearing bars in some cases with a recess or transverse groove at or near to
their centres, or near to either end of the bars on their bottom or under sides,
or with a square hole in or about the same relative positions as the recesses
or grooves. These recesses, transverse grooves, or holes, are so placed that
upon each set of bars being placed in position in the furnace a bolt or shaft
be placed under or through the entire set, so as to support it, the said
bolt or shaft resting in bearings in the sides or walls of the furnaces. When
it is desired to trip the bars so as to deliver the contents at the bottom or
mouth of the ash-pit, the bolt can be withdrawn. Or when the bars are
supported centrically, a crank handle can be attached to the shaft on which
the bars rest, and they can by means of this arrangement be either tripped or
rocked, as may be desired.
may

page_text: Figures 3 and 4 illustrate this part of our Invention, Figure 3 shewing the
position of a double set of fire-bars in the fire-box, and Figure 4 the trans-
verse bearer or bar for carrying or supporting the fire-bar a, b; f, g, h, in
Figure 3 is a mechanical arrangement by or through which the bars may be
moved, rocked, or tripped, the movement imparted by this arrangement to
the transverse bar, Figure 4, being communicated by it to the fire-bars a, b.
Figure 5 shews the application of this part of our Invention to a single set
of fire-bars. Although in the Drawings Figure 5 shews one length and
Figure 3 two lengths only of fire-bars, we do not confine ourselves to that
number, but propose to use three or more if found advantageous.
Having now particularly described and ascertained the nature of our said
Invention, and the means by which we effect the same, what we claim is the
construction and use of fire-bars in two parts or portions, in the manner
described in the opening part of this Specification, or in the Drawings shewn,
and also the mode or modes of mounting and giving motion to the fire-bar in
this Specification and appended Drawings described or shewn.
In witness whereof, we, the said William Arena Martin and Edward
Wylam, have hereunto set our hands and seals, this Ninth day of
September, in the year of our Lord One thousand eight hundred and
sixty-four.
WILLIAM ARENA MARTIN. (L.S.)
EDWARD WYLAM.
(L.S.)