Traction-Wheel Page: 2 of 3
This patent is part of the collection entitled: Texas Patents and was provided to The Portal to Texas History by the UNT Libraries Government Documents Department.
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UNITED STATES PATENT OFFICE.
ROBERT CONRAD SHINDLER, OF DALHART, TEXAS.
TRACTION-WHEEL.Specification of Letters Patent.
Patented June 9, 1914.
Application filed May 6, 1913. Serial No. 765,824.
To all whom it may concern:
Be it known that I, ROBERT CONRAD
SHINDLER, a citizen of the United States, and
a resident of Dalhart, in the county of Dal-
5 lam and State of Texas, United States of
America, have made a new and useful Im-
provement in Traction - Wheels, of which
the following is 'a specification.
This invention relates to traction wheels
10 and more particularly to a traction wheel of
that type in which tractor plates or members
are carried by a wheel rim for the purpose of
providing an effective grip for the wheel
when passing over a soft traction surface.
15 The object of the present invention is to
provide certain improved tractor members
or plates which, when properly mounted be-
tween annular rim plates of a wheel, will
operate to form the tractive surface of the
20 wheel when passing over a hard traction
surface, and to automatically project at one
end when the wheel passes over a soft trac-
tion surface in order to effect a satisfactory
grip and prevent the wheel from slipping.
25 The means by which the above objects are
accomplished are shown in the accompany-
ing drawings, in which-
Figure 1 is a side elevation of my im-
proved wheel, Fig. 2 is a radial section
3o through the rim of my improved' wheel,
taken substantially on line 2-2 of Fig. 1,
Fig. 3 is a vertical section taken substan-
tially on line 3-3 of Fig. 2, and Fig. 4 is a
perspective view of one of the tractor plates
35 removed.
Referring now to these figures, my inven-.
tion is adapted to a wheel, the rim of which
is formed by a pair of spaced annular rim.
plates A and A', to which are connected the
40 outer ends of the spokes B, .the latter as
usual radiating from the hub C. At equal
distantly spaced points therearound, the rim
plates A and A' are connected by trans-
verse bolts D, the reduced ends d of which
45 are extended through the rin plates as par-
ticularly shown in Fig. 2 and secured by
nuts d' threaded upon their extremities.
The tractor plates E, one of which is as-
sociated with each of the bolts D, before
50 mentioned, consist of a plurality of curved
plates, having longitudinal slotted openings
e adjacent their opposite side edges and
formed nearer to one end than to'the other
as particularly shown in Fig. 4, the end of
55 the plates nearest the slotted openings .ebeing provided with laterally projecting side
lugs e'.
Loosely disposed upon each of the bolts D
between the before mentioned rim plates are
sleeves F, and to these sleeves the tractor 6o
plates E are connected by means of U-bolts
G, the extremities of which are secured
through the slotted. openings e, as will be
seen by reference to Figs. 2 and 3.
The several tractor plates E are posi- 65
tioned so that their shorter ends project for-
wardly with respect to the direction of.
movement of the wheel, these shorter ends
of the tractor plates being prevented from
moving inwardly beyond the outer periph- 70
eral edge-of the rim plates owing to the lugs
e', which are adapted to engage the rim
plates and thus act as stops.
As will be seen from the several figures,
the rim plates A and A' are provided around 75
their inner peripheral edges with inwardly
projecting stop lugs a, located adjacent the
bolts D and adapted to limit the inward
movement of the longer ends of the tractor
plates as particularly shown in Fig. 3. 80
Thus from the foregoing, it will be seen
that the several tractor plates E are free to
rock on the bolts D which support the same
and may thus assume~a position substantially
tangential to the wheel when the latter 85
passes over a hard traction surface, this
position being indicated in dotted lines in
Fig. 3, from which it is apparent that the
tractor plates cooperate with the rim plates
in forming the tractive surface of the wheel. 90
When, however, the wheel passes over a
soft traction surface, the inner ends of the
tractor plates, being wholly exposed between
the rim plates, will be acted on and pressed
inwardly until they engage the stop lugs a, 95
resulting in an angular position of the trac-
tor plates in which their shorter ends are
projected outwardly and engage the soft
traction surface whereby to effectively grip
the same and prevent the wheel from slip- 100
ping.
It will be seen that the action of the trac-
tor plates in the connection before stated is
wholly automatic, and that they are strongly
supported and will be effective and durable 105
in use.
I claim:-
1. A traction wheel having spaced annu-
lar rim plates, and free moving tractor
plates pivotedly mounted intermediate their 1101,099,825.
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Shindler, Robert Conrad. Traction-Wheel, patent, June 9, 1914; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858886/m1/2/?q=%22~1%22~1: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.