IMPROVE- MENTS IN THE CONSTRUCTION OF TRAM-CAR WHEELS
Year: 1886

page_text: I, THOMAS ARCHER, junior, of Dunston Engine Works, Dunston in the County
of Durham, Engineer, do hereby declare the nature of my invention for IMPROVE-
MENTS IN THE CONSTRUCTION OF TRAM-CAR WHEELS to be as follows:-
My invention consists in constructing tram car wheels so as to afford on the one
hand great durability and on the other hand facility for renewal.
Wheels for Railway and other purposes have been for a long time past made in
two parts, whereof one is the body of the wheel and the other the tyre and many
varieties of construction have been adopted as for instance a wrought iron wheel
with a steel tyre or cast iron wheel with wrought iron or steel tyre, and the tyres
have been shrunk, bolted or pinned on, but some difficulty or dis-advantage still
exists in all the various arrangements which I am aware of, arising from the fact
that if the tyre is soft it is more liable to wear and if hard it is more liable to
break and there is not a cheap and convenient means whereby these dis-advantages
can be overcome.
Now the object of my Invention is to so construct tram car wheels as that both
these dis-advantages can be obviated in a cheap and efficient manner and so that
very serviceable and easily renewed wheels may be produced.
I construct an inner wheel of ordinary tough cast iron and turn the outside of
the rim, and part of one side of its rim in a lathe.—I then form a suitable mixture
of iron, cast into an accurately turned chill the part intended for the tyre so that
the tread and inner part of the flange and the flange edge of the wheel shall be
well chilled while the other parts of the tyre shall be kept soft; I then turn and
bore the tyre inside so as to fit the wheel, and by means of a projecting flange
overlapping the rim of the wheel itself, and bolts passing through both I attach
the tyre to the wheel.--I then have in the tyre the most durable wearing surface
in one part of my casting and at the same time toughness in other parts of the
same casting and with it almost the extreme of cheapness.
I make all wheels and tyres to one guage and so as that all parts shall be
interchangeable.
Dated TEAL
T
1000

page_text: Improvements in the Construction of Tram Car Wheels.
I, THOMAS ARCHER, junior, of Dunston Engine Works, Dunston, in the County
of Durham, Engineer, do hereby declare the nature of my invention for IMPROVE-
MENTS IN THE CONSTRUCTION OF TRAM CAR WHEELS, and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:---
My invention consists in constructing tram car wheels so as to afford on the one
hand great durability and on the other hand facility for renewal.
Wheels for Railways and other purposes have been for a long time past made in
two parts whereof one is the body of the wheel and the other the tire, and many
varieties of construction have been adopted as for instance a wrought iron wheel
with a steel tire, or cast iron wheel with wrought iron or steel tire, and the tires
have been shrunk, bolted or pinned on but some difficulty or dis-advantage still
exists in all the various arrangements which I am aware of, arising from the fact
that if the tire is soft it is more liable to wear and if hard it is more liable to
break, and there is not a cheap and convenient means whereby these dis-advantages
can be overcome.
Now the object of my invention is to so construct tram car wheels as that both
these dis-advantages can be obviated in a cheap and efficient manner, and so that
very serviceable and easily renewed wheels may be produced.
I construct an inner wheel of ordinary tough cast iron and turn the outside of
the rim, and part of one side of its rim in a lathe.-I then form a suitable mixture
of iron cast into an accurately turned chill the part intended for the tire, so that
the tread and inner part of the flange, and the tange edge of the wheel shall be
well chilled, while the other parts of the tire shall be kept soft.-I then turn and
bore the tire inside so as to fit the wheel, and by means of a projecting flange
overlapping the rim of the wheel itself, and bolts passing through both I attach
the tire to the wheel. I then have in the tire the most durable wearing surface in
one part of my casting and at the same time toughness in other parts of the saine
casting, and with it almost the extreme of cheapness.-I make all wheels and tires
which are of one size, to one guage and so as that all parts shall be interchangeable;
although of course I may have a series of different patterns of different sized wheels
in which for instance every No. 1 Tire tits every No. 1 Wheel, and every No. 2 Tire
every No. 2. Wheel and so on.
Having thus described the nature of my Invention I will proceed more par-
ticularly to describe the manner in which the same is to be operated, reference
being had to the drawings hereto attached.
In the drawing A. A. A. A. is what I have called the body of the wheel, and
B. B. B. B. is the tire, C. C. C. C. are bolt holes in both wheel and tire which
coincide where the wheel and tire are brought together, and D. D. D. D. are the
bolts which serve to hold tire and wheel together.-The face of the tire which is
nearest to the letter E, is the part which I cast in a chill, that is to say the wearing

page_text: surfaces, the other parts of the tire are kept soft so as that the tire can be easily
bored and faced at the parts fitting to the body of the wheel.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
The construction of Tram Car wheels, substantially as described, wherein an
easily interchangeable partly chilled and partly soft tire is fitted to a permanent
wheel body.