IMPROVEMENTS IN THE CONSTRUCTION OF RAILWAY WHEELS
Year: 1876

page_text: LETTERS PATENT to Joseph Armstrong, of Rotherham, in the County of York,
Engineer, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF
RAILWAY WHEELS”
Sealed the 1st Juno 1877, and dated the 16th December 1876.
PROVISIONAL SPECIFICATION left by the said Joseph Armstrong at the Office
of the Commissioners of Patents on the 16th December 1876.
JOSEPH ARMSTRONG, of Rotherham, in the County of York, Engineer.
PROVEMENTS IN THE CONSTRUCTION OF RAILWAY WHEELS."
« IM-
The Invention has for its object improvements in the construction of railway
wheels in order to increase their safety and elasticity, and to simplify their con-
struction. For this purpose I use two wrought-iron plates to form the disc of the
wheel in a similar manner to that described in the Specification of former Letters
Patent granted to me, dated February 13, 1873, Number 532. Between these plates
where they are united with the boss I place a wrought-iron hoop, and I combine it
with the plates forming the disc so as to form one solid mass by casting the boss
thereon, or in some cases the hoop may be dispensed with.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Armstrong in the Great Seal Patent Office on the 15th June
1877.
JOSEPH ARMSTRONG, of Rotherham, in the County of York, Engineer. “IM-
PROVEMENTS IN THE CONSTRUCTION OF RAILWAY WHEELS."
The Invention has for its object improvements in the construction of railway
wheels in order to increase their safety and elasticity, and to simplify their con-
struction. For this purpose I use two wrought-iron plates, bent cr bellied outwards,
to form the disc of the wheel and to secure elasticity thereto, in a similar manner to
that described in the Specification of former Letters Patent granted to me, dated
February 13, 1873, No. 532. Between these plates where they are united with
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disc so as to form one solid mass by casting the boss thereon, or in some cases the
hoop may be dispensed with.
And in order that my said Invention may be more clearly understood and readily
carried into effect I will proceed, aided by the accompanying Drawings, more fully
to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figures 1, 2, 3, and 4 are cross sections of railway wheels constructed according
to my Invention, but differing from each other in the mode of connecting the discs
to the tyres. Figure 5 is a side view of one of such wheels with the outer portion
of the boss removed, and Figure 6 is a vertical section of one of my improved
wheels taken through the centre thereof; a, a, are two wrought-iron plates which
are bent or bellied outwards as shown, or may be otherwise bent or shaped so as to
secure sufficient elasticity thereto. These plates a, a, which form the disc of the
wheel, are formed with perforations, a', at their inner periphery, which latter is
formed with a series of projections, a*; between these plates a is placed a ring b,
and outside of each plate is placed another ring c.
The various parts are placed in position in a mould, and cast metal, preferably
cast steel, is then poured therein to form the boss, thereby uniting the plates a, a,
rings b, c, and boss d into one solid mass.
Instead of employing a continuous ring b, a ring formed of a number of seg-
ments, as shown clearly at Figure 6, may be used, and if desired, three or more
distance pieces or spokes e may be employed, in which case I connect them to the
ring b by rivets, bolts, or screws passing through the spokes e, and through the parts
of the segments b; I also, when using such distance pieces or spokes e, spread
out their inner ends so as to securely hold the same by the cast metal forming the
boss. The wrought-iron rings b, c, assist in giving strength to the boss, and the
cast metal, by running through and filling up the holes a', and running round and
filling up the spaces about the projections a² of the discs, firmly and securely con-
nects the discs a with the nave or boss d. By my Invention the strength, tenacity
and elasticity of the plates a are fully preserved, and the safety of the wheels in
use thereby increased.
Having thus described the nature of my said Invention and the mode in which
I carry the saine into effect, I would have it understood that what I claim is, con-
structing railway wheels by the use of wrought-iron plates a, forming the disc in
combination with a cast boss or nave d, and rings b and c, united together in
manner substantially as herein shown and described."
In witness whereof, I, the said Joseph Armstrong, have hereunto set my
hand and seal, this Thirteenth day of June, in the year of our Lord One
thousand eight hundred and seventy-seven.
PANTAT
LAVATTAIN