Improvements in Combined Tie-bars and Chairs for Tramways and Railways.
Year: 1885

page_text: Improvements in Combined Tie-bars and Chairs for Tramways
and Railways.
I, WILLIAM PROSSER STEWART, of Rock Foundry, Blackwood, in the County of
Monmouth ironfounder, do hereby declare the nature of this invention to be as
follows:-
This invention, which relates to that class of tramways and railways in which
the rails are carried in " chairs," consists in combining with the chairs tie-bars of
wrought iron, or metal possessing substantially the same nature as wrought iron,
and in incorporating the bars with the chairs in the manner following:
Towards the ends the faces of the tie-bars are scored cut or otherwise roughened,
and the bars are then heated. While hot, they are placed in the moulds in which
the chairs are cast and are adjusted so that one end of a bar lies in one chair and
the other end of the bar lies in the chair which is to be connected to the first
mentioned chair.
The molten metal of which the chairs are to be cast is then run into the moulds
and surrounds the beated and roughened ends of the tie-bars which thus become
rigidly fixed in the chairs.
Combined chairs and tie-bars made according to this invention are lighter than
those in which the chairs and bars are cast together and they are less liable to
fracture under the strains to which they are subjected.
W. LLOYD WISE,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Combined Tie-bars and Chairs for Tramways
and Railways.
I, WILLIAM PROSSER STEWART, of Rock Foundry, Blackwood, in the county of
Monmouth, Ironfounder, 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 :-
.
This invention, which relates to that class of tramways and railways in which
the rails are carried in "chairs," consists in combining with the chairs tie-bars of

page_text: wrought iron, or metal possessing substantially the same nature as wrought iron,
and in incorporating the bars with the chairs in the manner following:
Towards the ends the faces of the tie-bars are scored cut or otherwise roughened,
. and the bars are then heated. While hot, they are placed in the moulds in which
the chairs are cast and are adjusted so that one end of a bar lies in one chair and
the other end of the bar lies in the chair which is to be connected to the first
mentioned chair.
+
The molten metal of which the chairs are to be cast is then run into the moulds
and surrounds the heated and roughened ends of the tie-bars which thus become
rigidly fixed in the chairs.
Combined chairs and tie-bars, made according to this invention are lighter than
those in which the chairs and bars are cast together and they are less liable to
fracture under the strains to which they are subjected.
Referring to the accompanying sheet of drawings, Fig. 1 shows a pair of chairs
combined with a tie-bar, the chairs being designed to receive flat footed rails.
One of the chairs and the part of the tie-bar within it are in section. Fig. 2 is a
plan of the same arrangement, one of the chairs being in horizontal section,
Figs. 3 and 4 are similar views to Figs. 1 and 2, the chairs in this case being
designed to receive a rail of bridge section.
Figs. 5 and 6 shew a modification.
It will
The tie-bar A has holes B cut through its ends by punching. Having been
heated it is, as already stated, placed in the moulds in which the chairs are to be
cast, one end being placed in each mould, then the molten metal is run into the
moulds and surrounds the cut ends of the bar which then become rigidly fixed in
the respective chairs CD, care being taken to ensure accuracy of gauge.
be evident that instead of cutting holes through the ends of the tie-bars, they may
be otherwise cut, or roughened or both cut and roughened (see Figs. 5 and 6 where
BB are the cuts); also that the form of tie-bar may be varied to suit circumstances,
and that such tie-bars may serve also in practice as cross sleepers.
Having now particularly described and ascertained the nature of this inven
tion, and in what manner the same is to be performed, I declare that what
I clain is
The hereinabove described manufacture of improved combined tie-bars and
chairs in which the chairs are cast upon the heated, scored, cut, or roughened ends
of bars of metal such as wrought iron as above set forth with reference to the
drawings.