An Improved Trolly Wheel.
Year: 1894

page_text: Date of Application, 24th Jan.. 1894
Complete Specification Left, 5th Oct., 1894-Accepted, 10th Nov., 1894
PROVISIONAL SPECIFICATION.
An Improved Trolly Wheel.
I, ALFRED GEORGE SPENCER, of 77 Cannon Street, in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to an improved trolly wheel of the class described
in the Specification of my previous Patent No. 909 of the year 1889.
A trolly wheel according to my present invention comprises a nave or centre of
suitable material such as cast iron with an external annular projection or flange, a
rim or tyre of T or equivalent section, thin body plates of suitable material such
as steel stamped to form each with a hollow boss to fit upon and around the before
mentioned nave or centre and with an outwardly turned flange at the periphery,
and a couple of L-shaped or approximately L-shaped rings of elastic material
such as vulcanized india rubber. The parts are put together with the annular
projection or flange of the nave or centre and the internal annular projection of
the T-shaped rim or tyre between the body plates, the L-shaped india rubber rings
being interposed between the rim or tyre and the body plates, one at each side of
the said internal annular projection of the rim or tyre; and the whole fastened
together by rivets or bolts.
In a modified construction the two L-shaped rings are replaced by a single ring
of U or equivalent section with lateral flanges.
Dated this 24th day of January 1894.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
COMPLETE SPECIFICATION.
An Improved Trolly Wheel.
I, ALFRED GEORGE SPENCER, of 77 Cannon Street, in the City of London,
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 :-
This invention has reference to an improved trolley wheel of the class described
in the Specification of my previous Patent No. 909 of the year 1889.
A trolley wheel according to my present invention comprises a nave or centre of
suitable material such as cast iron with an external annular projection or flange, a
rim or tyre of T or equivalent section, thin body plates of suitable material such
as steel stamped to form, each with a hollow boss to fit upon and around the before
mentioned nave or centre and with an outwardly turned flange at the periphery,
and a couple of L-shaped or approximately L-shaped rings of elastic material
such as vulcanized india rubber. The parts are put together with the annular
projection or flange of the nave or centre and the internal annular projection of the
T-shaped rim or tyre between the body plates, the L-shaped india rubber rings
being interposed between the rim or tyre and the body plates, one at each side of
the said internal annular projection of the rim or tyre; and the whole fastened
together by rivets or bolts."

page_text: Fig. 1 is a side elevation; and
Fig. 2 a cross section illustrating a trolley wheel constructed according to this
invention.
is a cast iron nave or centre provided with an external annular flange or
projection 2 3 is a metal rim or tyre of T-section; 4, 4 are thin metal body
plates, cach stamped with a central hollow boss 4" to fit the nave or centre 1, with an
outwardly turned and slightly inclined flange 4 at the periphery, and with grooved
or hollow rib like radial strengthening parts 4°; and 5, 5 are two approximately
L-shaped rings of elastic material, such as vulcanized india rubber, arranged
between the flanges 4, and the rim or tyre 3. The several parts are put together
in the manner shown and firmly secured in place by the nuts and bolts 6, or it may
be by rivets if desired.
By the construction described and shown the body plates 4 are better adapted
than heretofore, to support the elastic rings 5, and the elasticity of the rings can
be effectively brought into play without bending the outwardly flanged portions of
the said body plates, except, it may be, to a small extent well within their limit of
elasticity.
Fig. 3 is a part cross section, showing a modified construction of trolley wheel
according to this invention in which the two L-shaped elastic rings 5 in the
arrangement shown in Figs. 1 & 2 are replaced by a single ring 5, of U, or
equivalent section, with lateral flanges 5b.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
My improved trolley wheel constructed as hereinbefore described with reference
to Figs. 1 & 2, or modified according to Fig. 3 of the drawings annexed.
Dated this 5th day of October 1894.
ALFRED GEORGE SPENCER.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.