Improvements in Moulding Firebars for Steam Boilers and the like.
Year: 1893

page_text: Date of Application, 23rd Feb., 1893
Complete Specification Left, 23rd Nov., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Moulding Firebars for Steam Boilers and
the like.
I, RALPH HORSFIELD, of Chapel-en-le-Frith, in the County of Derby,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates particularly to moulding the firebars for steam boilers and
the object of my invention is to effect an economy in the operation of moulding.
In moulding firebars by the usual operations a box is employed to carry the
mould while the metal is poured to produce the casting; according to my invention
I place the pattern (or patterns) on a plate and cover it with a box and then ram
the sand round the pattern which is then lifted out of the sand, and the plate
replaced in position.
I make the box so that it can be readily taken off the mould without disturbing
or injuring the form of the latter and then run the metal into the mould.
In this way instead of having a box for every mould I use one box to make any
number of moulds and run the metal into a mould composed of sand alone and quite
regardless of the box.
Dated this 22nd day of February-1893.
:
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Moulding Firebars for Steam Boilers and
the like.
I, RALPH HORSFIELD, of Chapel-en-le-Frith, in the County of Derby,
Engineer, 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 :-
My invention relates particularly to moulding the firebars for steam boilers and
the object of my invention is to effect an economy in the operation of moulding.
In moulding firebars by the usual operations a box is employed to carry the
mould while the metal is poured to produce the casting; according to my invention
I place the pattern (or patterns) on a plate and cover it with a box and then ram
the sand round the pattern which is then lifted out of the sand, and the plate
replaced in position.
I make the box so that it can be readily taken off the mould without disturbing
or injuring the form of the latter and then run the metal into the mould.
In this way instead of having a box for every mould I use one box to make any
number of moulds and run the metal into a mould composed of sand alone and quite
regardless of the box.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Fig. 1 is a side elevation of a table with several firebar patterns attached
according to my invention, and Fig. 2 is a plan view of the same.
Figs. 3 and 4 are side view and plan of a slotted plate and moulding box.
Fig. 5 is a side view of the table with patterns and the slotted plate secured to
the moulding box placed in an inverted position.
Fig. 6 is a plan view of Fig. 5 with the moulding box above the table.

page_text: Fig. 7 is a side view of the mould; with the moulding box and table with
patterns removed, and in their stead a metal cover with git frame, and Fig. 8 is a
plan view of Fig. 7.
In the drawings, a represents the table to which several firebar patterns a¹
are attached by screws a² as shown in Figs. 1 and 2; b is a plate with slots b
which is preferably secured to a moulding box c, d a metal cover for the box c,
and e a git frame formed to be placed readily in position on the cover d when
required.
The pattern firebars a' are made extra deep to allow for the thickness of the
slotted plate 6 through the slots in which the patterns project when the table a is
placed above the moulding box c, this plate is secured to the moulding box cas
shown in Fig. 3. To make a mould the box c and plate 6 is placed upon the
table a with the firebar patterns projecting through the slots ', the sand is now
rammed tightly round the patterns and a main git ƒ and branches f¹ prepared for
guiding the metal into the mould; the moulding box and pattern table a with the
patterns a¹ are now reversed, the table a with the pattern is removed, the plate >>
preventing the sand falling in when the patterns are lifted, the moulding box with
its plate b is taken away and in its place a solid plate of metal d is placed upon the
sand mould, this plate d has a hole in it over which a git frame e is fitted to receive
the metal which is now run into the mould and the operation completed.
By the means described I obtain a somewhat chilled top surface on the firebars
when cast, and as the top side of the bars cool first the tendency to warp is
counteracted and I am further enabled to cast any number of firebars with a single
moulding box thus dispensing with the large number of boxes usually employed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. Moulding firebars for steam boilers and the like by the improved operation
of moulding substantially as described and as illustrated in the accompanying
drawings.
2. The use and application of a plate such as a to which the patterns are
attached in combination with a slotted plate, such as 6 preferably secured to the
moulding box for moulding firebars substantially as herein described.
Dated this 22nd day of November 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.