Back-Pedaling Brake. Page: 3 of 4
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NICHOLAS WALLERICH, OF FORT WORTH, TEXAS.
SPECIFICATION forming part of Letters Patent No. 635,704, dated October 24, 1899.
Application filed December 30, 1897. Serial No. 664,64W. (No model.)
To all whom it mnYay/ COThConcr'i
Be it known that I, NICHOLAS WALLERICH,
a citizen of the United States, residing at Fort
Worth, Texas, have invented a new and Iin-
5 proved Brake and Coasting Sprocket-Wheel
for Velocipedes, of which the following is a
My invention relates to improvements in
sprocket-wheels, and the object is to con-
10 struct a combined coasting and driving wheel
with brake attachments for stopping veloci-
pedes, whether coasting or whether the ve-
locipede is being propelled by some kind of
motive power, by which a person can coast
15 by simply stopping the motion of the pedals
and holding the pedals still with the feet;
and I accomplish this object by the combina-
tion of the mechanism hereinafter fully de-
scribed and more particularly pointed out in
20 the claims.
Reference is had to the accompanying draw-
ings, forming a part of this specification.
Figure 1 is a side elevation of a sprocket-
wheel and a pedal-crank, showing my attach-
25 ments. Fig. 2 is a side elevation of the wheel,
showing parts of one of the flanges broken
away to expose the spring-pressed dogs, this
view being opposite that of Fig 1. Fig. 3 is
a sectional view of the wheel, the pedal-crank
30 being shown in broken front elevation and
the pedal being turned to show the top. Fig.
4 is a side elevation of a pedal-crank and link-
rod, with the rack, and cog-wheel, with the
flange cut away. Fig. 5 is a perspective of
35 the clip for holding said rack in alinement
with said cog-wheel. Fig. 6 is a cross-sec-
tion of said clip. Fig. 7 shows a variation in
the friction-brake. Fig. 8 shows an irregu-
lar bolt-head Fig. 9 is a horizontal view of
40 the brake-rod, illustrating the rack and the
flange on this rod.
Similar characters of reference indicate the
same parts throughout the several views.
The invention consists in certain appliances
45 attached to a sprocket-wheel and in adapting
the sprocket-wheel to purposes set forth.
In the drawings a wheel is illustrated which
is constructed in two sections A and B, sec-
tion B being adapted to run within section A.
5o Wheel A has an annular flange a integral
therewith and a similar flange b bolted or
riveted to the opposite side of wheel A. These
flanges make an annular space for wheel B
and hold said wheel concentrically within
wheel A and constitute a bearing fora brake- 55
band. These flanges are L-shaped in cross-
section. The wheel-sections are locked to-
gether, and the structure forms for driving
purposes one wheel. The sections are locked
together by means of the dogs c c c, which 6o
are substantially triangular and are inserted
in recesses cut in the outer part of inner sec-
tion B. The springs c d c aid in making the
dogs c c c en gage the outer section A promptly.
These dogs are pivotally mounted in said re- 65
cesses, and the side next to wheel A is curved,
and the sides in which springs d d cd are in-
serted must be longer than the other straight
sides. When wheel B is driven in the direc-
tion of the arrows, the cams engage wheel A 70
by reason of the differences in the length of
the sides, as specified. The braking mech-
anism consists of a band D, which is attached
to an arm R', mounted on wheel B by means
of bolt g, and also attached to a bell crank- 75
lever E by means of bolt h". Lever E is piv-
otally connected to a rod F, which has a rack
G integral with the lower end thereof, and is
engaged by a cog-wheel h', mounted on the
pedal next to the pedal-crank. One of the 80
teeth of rack G is pivoted in a recess cut in
said rod. This tooth G' stands normally in
the position shown in Fig. 4 and is held in
this position by a spring II, which is prefer-
ably a spiral spring. When the bicycle is be- 85
ing propelled, this tooth G' by reason of its
pivotal mounting and the spring H allows
the teeth of cog h' to pass by pressing the
tooth up. In Fig. 4 the cog h' turns in the
direction opposite to that of the hands of a 90
clock when the velocipede is being propelled.
If it is desired to stop the velocipede grad-
ually, reverse the motion of the pedal slightly.
Cog h' will then engage rack G, and this op-
eration will pull down on rod F, and thus cause 95
lever E to clamp flange a with the brake-band
D Fig. 1 shows the rack G and cog h' in dot-
ted outline, the cog h' being covered by a
flange p. In Fig. 4 this flange is cut away.
Fig. 3shows the position of the flangep. The 1oo
rod F is provided with a flange p'. (Shown in
Fig. 4.) Flange p' comes against the pedal-
shaft and constitutes a bearing for the rack
G. This flange p' coming against the pedal-
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Wallerich, Nicholas. Back-Pedaling Brake., patent, October 24, 1899; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth509774/m1/3/: accessed January 20, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.