Improvements in Oar Wheels.
Year: 1892

page_text: Complete Specification Left, 11th Oct., 1892-Accepted, 3rd Dec., 1892
COMPLETE SPECIFICATION.
Improvements in Oar Wheels.
I, GEORGE HARLEY GRAHAM of Oak Park in the County of Cook and State:
of Illinois, United States of America, Clerk, 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 :-.
ز.
The object of the invention is to provide a new and improved car-wheel which
is simple and durable in construction, composed of but few parts, and constructed
mostly or entirely from rolled, forged; or drawn metal to reduce to a minimum the´´›
chances of breaking from crystallization or other causes.
The invention consists of a tire formed at its inner surface with segmental
recesses adapted to receive the segmental ends of the spokes, which are pivoted at
their inner ends to the hub.
The invention also consists of certain parts and details and combinations of
the same, as will be hereinafter described, and then pointed out in the claims.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
all the figures.
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Figure 1 is a face view of the improvement with parts in section.
Fig. 2 is a transverse section of the same, on line 22 in Fig. 1..
Fig. 3 is a face view of the hub with face-plate removed.
Fig. 4 is a plan view of the blank for forming the spokės.
Fig. 5 is a perspective view of one of the spokes.
Fig. 6 is a perspective view of a modified form of spoke, and
Fig. 7 is a transverse section of a modified form of the improvement.
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The improved car-wheel is provided with a tire A, formed with the usual tread
and flange; and also formed at its inner surface with segmental recesses B, into
which fit the correspondingly shaped segmental ends C of the spokes C, each made
of a single piece of metal bent upon itself to form an eye C, from which extends
the shank. C, which terminates in the segmental ends C, as plainly illustrated in
Fig. 5. The two parts forming the shank. Care preferably riveted together, as
illustrated, and the said shank extends, preferably, radially, but may be curved, if ...
desired..
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In the eye C of each spoke C. fits a transversely extending rubber cylinder D,
lined at its inside with a tube E, through which passes a bolt F, which latter thus >
forms a pivot for the spoke, as will be readily understood by reference to Figs. 1
and 2. The bolt F is held in the annular flange G of the hub G, and also serves
to hold the face-plate H of the said hub against the front face of the inner ends of
the spokes, as plainly shown in Fig. 2. It will be seen that by this construction
considerable elasticity is given to the spokes, as the same may give in either
direction at their ends C' or at the shank C, as the spokes are pivoted to the hub.
The end of the hub G is preferably made of polygon form on the outside and is
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page_text: engaged at this point by a similar shaped opening on the face plate H, so that the
latter cannot turn on the hub.
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In constructing the car-wheel each of the ends C¹ of a spoke C is formed with an
offset C*, extending transversely and fitting into a corresponding recess extending
from the segmental recess Be
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In order to place the ends C in position, a ring J is provided, fastened by bolts K
to the tire A at the rear side thereof, the said ring being formed with an inwardly
extending flange J', engaging the underside of the projection C at one side of the
end C', the other side of the said projection being fitted into the extension of the
recess B.
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In order to prevent all noise at the pivotal end of the spokes, the rubber
cylinder D is preferably made somewhat longer than the eye C, so that the
rubber fits snugly at its ends between the flange G¹ and the face-plate Hof
the hub.
:
As illustrated in Figs. 6 and 7, the spoke C is only formed with one seg-
mental end C, as the other and part of the shank are omitted, part of the eye C
being riveted to the single shank, as-will be plainly understood by reference to the
said figures.
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The hub G is secured in the usual manner to the axle I, so that further description
of this part is not deemed necessary.
It is understood that the several parts of the wheel described, with the exception of
the rubber cylinder D, are made from rolled, forged, or drawn metal, so that the
chances of breaking from crystallization, or other causes are reduced to a minimum.
It will further be seen that any of the parts of the wheel can be readily renewed and
replaced by a new one without discarding the other parts.
The cushion formed by the rubber cylinders D and interposed between the tire A
and the hub prevents injury to the axle by absorbing the vibration and jarring which
tends to promote crystallization of the molecules in the metal; and when there
wheels are applied to electric cars, which are subject to severe shocks and jarring,
they preserve the motors and truck from crystallization, and allow an elastic torque
for the motors in starting.
.
It will further be seen that a wheel constructed in the manner shown and described:
permite independent expansion of the hub and tire, and consequently reduces
breakage from unequal, expansion caused by heating, due to hot boxes or sudden
application of the brakes. The spokes in expanding, give laterally sufficiently to
prevent any part of the wheel from breaking. In case the tire should become
cracked from any cause whatever the ring J and the spokes C prevent the pieces
from falling out and causing injury. …; }
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
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1.A car-wheel comprising a tire formed at its inner surface with segmental
recesses, spokes having segmental enda fitting into the said. recesses, and a hub
carrying pivots engaging the inner ends of the said: spokes, substantially as shown
and described...
2. A car-wheel comprising a hub, a tire, spokes connecting the said tire with the
said hub, and a rubber cushion arranged on the inner end of each of the said spokes
substantially as shown and described.
3. A car-wheel provided' with a' spoke formed with a shank, an eye arranged on
one end of the shank, and a segmental end arranged on the outer end of the shank, i
substantially as shown and described.
4. A car-wheel 'comprising a tire formed at its inner surface, with segmental
recesses, a hub carrying bolts forming pivots, spokes, each formed with a shank,
segmental ends projecting from the said shanks and engaging the recesses in the.
said tire, the inner ends of the said spokes: being formed with an eye, and a rubber :5

page_text: cylinder fitting in the said eye of each spoke and through which passes the bolt of
the said hub, substantially as shown and described.
5. A car-wheel comprising a tire formed at its inner surface with segmental
recesses, a hub carrying bolts forming pivots, spokes, each formed with a shank,
segmental ends projecting from the said shanks and engaging the recesses in the
said tire, the inner ends of the said spokes being formed with an eye, a rubber
cylinder fitting in the said eye of each spoke and through which passes the bolt of
the said hub and a ring bolted to the said tire for holding the segmental ends of
the spokes in place, substantially as shown and described.
Dated this 11th-day of October 1892.
F. W. BARKER,
Applicant's Agent.