A Combined Brake and Coasting Sprocket Wheel for Velocipedes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
A Combined Brake and Coasting Sprocket Wheel for Velocipedes.
I, NICHOLAS WALLERICH, Dentist, a citizen of the United States of America,
residing at Fort Worth, in the State of Texas, do hereby declare the nature of this
invention to be as follows:-
My invention relates to the improvements in sprocket wheels and the object
is to construct a combined coasting and driving wheel with brake attachments
for stopping velocipedes, whether coasting, or whether the velocipede is being
propelled by some kind of motive power, by which a person can coast by simply
stopping the motion of the pedals and holding the pedals still with the feet, and I
accomplish these objects by the combination of the mechanism hereinafter fully
described.
Reference is had to the accompanying drawings forming a part of this
specification.
Fig. 1 is a side elevation of a sprocket wheel and a pedal crank showing my
attachments. Fig. 2 is a side elevation of the wheel, showing parts of one of the
flanges broken away to expose the spring-pressed cams, this view being opposite
that of Fig. 1. Fig. 3 is a sectional view of the wheel, the pedal crank being
shown in broken front elevation and the pedal, being a broken view, 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 the clip
for holding said rack in alignment with said cog wheel. Fig. 6 is a cross-section
of said clip. Fig. 7 shows a variation in the friction brake. Fig. 8 shows an
irregular bolt head. Similar characters of reference indicate the same parts
throughout the several views.
The invention consists in certain appliances 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, section A being adapted
to run outside of section B. 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. These flanges are L-shaped in cross section, one of said flanges
constitutes a bearing for a friction clutch or clamp. The wheel sections are locked
together and the structure forms for driving purposes one wheel. The sections
are locked together by means of the cams ccc which are substantially triangular
and are inserted in recesses cut in the outer part of inner section B. The
springs d d d aid in making the cams ccc engage the outer section A promptly.
These cams are pivotally mounted in said recesses and the side next to wheel A
is curved and the sides in which springs d d d are inserted must be longer than
the other straight sides. When wheel B is driven in the direction of the arrows
the cams engage wheel A by reason of the differences in the length of the sides as
specified. The braking mechanism consists of a clutch 1) which is attached to an
arm R mounted on wheel B by means of a bolt and also attached to a bell crank

page_text: lever E by means of bolt ". Lever E is pivotally connected to a rod F which has
a rack G integral with the lower end thereof and is engaged by a cog wheel h¹
mounted on the pedal next to the pedal crank.
One of the 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 H which is preferably a
spiral spring. When the bicycle is being propelled this tooth G, by reason of
its pivotal mounting and the spring H, allows the teeth of cog h¹ to pass by pressing
the tooth up. In Fig. the cog turns in a direction opposite to that of the
hands of a clock when the velocipede is being propelled. If it is desirable to stop
the velocipede gradually, reverse the motion of the pedal slightly. Cog h¹ will
then engage rack G and this operation will pull down on rod F and thus cause
lever E to clamp flange a with the friction clutch D. Fig. 1 shows the rack G,
and cog h¹ in dotted outline, the cog h¹ being covered by a flange p. In Fig. 4
this flange is cut away. Fig. 3 shows the position of the flange p. The rod F
is provided with a flange p' shown in Figs. I and 4. Flange 71 comes against the
pedal shaft and constitutes a bearing for the rack G. This flange p coming
against the pedal shaft and the back of rack G resting against guide N constitutes
a brace or bearing for rod F. This will give a spring to rod F when drawing
down on lever E. A clip M is mounted on the lower end of the pedal crank and
covers the bottom sides, and back of the lower end of the crank. The part M¹ of
this clip is held in place by the nut on the end of the pedal shaft. This clip has
a guide N for the rod F in its upward and downward motion. Instead of using
this clip the guide N can be made integral with the lower end of the pedal crank
as illustrated in Fig. 3.
There will be wear between the friction clutch D and the flange a. I place a
bolt in wheel B with a head having sides of unequal distance from the center of
the bolt. The side having the shortest distance from the center of the bolt is
placed next to arm R¹. As the clutch and the flange wear the next side is
turned next to the arm R¹ and so on until the clutch and the flange are almost
worn out. The bolt is secured by a nut on the opposite side of the wheel B.
The
The variation shown in Fig. 7 consists in substituting for clamp or clutch D
brake shoes which are attached to lever E¹ for simply gripping the flange a.
operation may be described as follows: When it is desired to coast, sufficient speed
having been obtained, stop pedaling, hold the pedals still with the feet, the cams
will release wheel A and leave this wheel free to revolve. Wheel B is adapted to
remain stationary while wheel A revolves, the wheels being in the same plane.
When it is necessary to brake, back pedal slightly; this will cause cog h¹ to
engage rack h; this will draw on rod and pull the long end of lever E and so
press clamp D on flange a. The braking may be done at any point of the circum-
ference of the circle made by the pedal. The propelling is done in the same way
as in other wheels. Modifications in the manner of attaching wheel B, to pedal
shafts are to be made so that my invention can be attached to any style of
velocipedes.
D
1
.
1000

page_text: Fort Worth, Texas, U.S.A., do hereby declare the nature of this invention and in
what manner the same is to be performed; to be. particularly described, and ascer-
tained in and by the following statement:-
My invention relates to the improvements in sprocket wheels and the object
is to construct a combined coasting and driving wheel with brake attachments
for stopping velocipedes, whether coasting, or whether the velocipede is being
propelled by some kind of motive power, by which a person can coast by simply
stopping the motion of the pedals and holding the pedals still with the feet, and I
accomplish these objects by the combination of the mechanism hereinafter fully
described and more particularly pointed out in the claims.
Reference is had to the drawings left with the Provisional Specification.
Fig. 1 is a side elevation of a sprocket wheel and a pedal crank showing my
attachments. Fig. 2 is a side elevation of the wheel, showing parts of one of the
flanges broken away to expose the spring-pressed cams, this view being opposite
that of Fig. 1. Fig. 3 is a sectional view of the wheel, the pedal crank being
shown in broken' front elevation and the pedal being a broken view 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 the clip
for holding said rack in alignment with said cog wheel. Fig. 6 is a cross-section
of said clip. Fig. 7 shows a variation in the friction brake. Fig. 8 shows an
irregular bolt head. Similar characters of reference indicate the same parts
throughout the several views.
The invention consists in certain appliances 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, section A being adapted
to run outside of section B. Wheel A has an annular flange a integral therewith
and a similar flange bolted or riveled to the opposite side of wheel A. These
flanges make an annular space for wheel B and hold said wheel concentrically-
within wheel A. These flanges are L-shaped in cross section, one of said flanges
constitutes a bearing for a friction clutch or clamp. The wheel sections are locked
together and the structure forms for driving purposes one wheel. The sections
are locked together by means of cams ecc which are substantially triangular
and are inserted in recesses cut in the outer part of inner section B., The
springs d d d aid in making the cams ccc engage the outer section A promptly.
These cams are pivotally mounted in said recesses and the side next to wheel A
is curved and the sides in which springs d d d are inserted must be longer than
the other straight sides. When wheel B is driven in the direction of the arrows
the cams engage wheel A. by reason of the differences in the length of the sides as
specified. The breaking mechanism consists of a clutch 1 which is attached to
an arm R mounted on wheel B by means of a bolt and also attached to a bell
crank lever E by means of bolt 4. The construction of the short arm of this
lever is shown in Fig. 8. Lever E is pivotally connected to a rod F which has
a rack G integral with the lower end thereof and is engaged by a cog wheel h¹
mounted on the pedal next to the pedal crank. One of the teeth of rack G is
pivoted in a recess cut in said rod. This tooth G¹ stands normally in the position
shown in Fig. 4 and is held in this position by a spring H which is preferably a
spiral spring. When the bicycle is being propelled this tooth G¹, by reason of
its pivotal mounting and the spring H, allows the teeth of cog h¹ to pass by
pressing the tooth up. In Fig. 4 the cog h¹ turns in a direction opposite to that
of the hands of a clock when the velocipede is being propelled.
'
If it is desirable to stop the velocipede gradually, reverse the motion of the
pedal slightly. Cog will then engage rack G and this operation will pull down
on rod F and thus cause lever E to clamp flange a with the friction clutch D.
Fig. 1 shows the rack G, and cog h¹ in dotted outline, the cog h¹ being covered by.
a flange p. In Fig. 4 this flange is cut away. Fig. 3 shows the position of the
flange p. The rod is provided with a flange shown in Figs. 1 and 4.
Flange comes against the pedal shaft and constitutes a bearing for the rack G.

page_text: .
This flange p₁ coming against the pedal shaft and the back of rack G
resting against guide N constitutes a brace or bearing for rod F. This will give
a spring to rod F when drawing down on lever E. A clip M is mounted on the
lower end of the pedal crank and covers the bottom, sides, and back of the lower
end of the crank. The part M' of this clip is held in place by the nut on the end
of the pedal shaft. This clip has a guide N for the rod in its upward aid
downward motion. Instead of using this clip the guide N can be made integral
with the lower end of the pedal crank as illustrated in Fig. 3.
24
1
There will be a wear between the friction clutch, I) and the flange a. I place a
bolt in wheel B with a head having sides of unequal distance from the center of
the bolt. The side having the shortest distance from the center of the bolt is
placed next to arm R. As the clutch and the flange wear the next side is turned
next to the arm R₁ and so on until the clutch and the flange are almost worn out.
The bolt is secured by a nut on the opposite side of the wheel B.
The sprocket wheel can be used as the ordinary sprocket wheel by simply
fastening the two sections together. I do this by putting a bolt W₁ through the
flanges and band the inner wheel B and securing the bolt with a suitable
nut W.
The
The variation shown in Fig. 7 consists in substituting for clamp or clutch D
brake shoes which are attached to lever E¹ for simply gripping the flange a.
operation may be described as follows: When it is desired to coast, sufficient speed
having been obtained, stop pedaling, hold the pedals still with the feet, the cams
will release wheel A and leave this wheel free to revolve. Wheel B is adapted to
remain stationary while wheel A revolves, the wheels being in the same plane.
When it is necessary to brake, back pedal slightly; this will cause cog h¹ to
engage rack G; this will draw on rod F and pull the long end of lever E and so
press clamp D on flange a. The braking may be done at any point of the circum-
ference of the circle made by the pedal. The propelling is done in the same way
as in other wheels. Modifications in the manner of attaching wheel B, to pedal
shafts are to be made so that my invention can be attached to any style of.
velocipedes.
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:-
-
1. A sprocket wheel constructed in an outer and an inner section capable of
independent rotation and provided with circular flanges secured to said outer
section, said flanges having broad shoulders on their inner rims, a brake lever
pivoted on said inner section, and a clutch pivotally attached to said lever and
adapted to be pressed against one of said flanges, and means adapted to operate said
lever.
2. A sprocket wheel composed of two sections capable of independent rotation
provided with braking mechanism consisting of a lever pivoted on the inner
section, a friction clutch pivoted on said lover, a link rod pivoted to said lever, a
.cog wheel mounted on the pedal shaft and a rack integral with the lower end of
said rod to mesh with said cog.
3. In a sprocket and coasting wheel the combination of two sections forming
said wheel, one section running within the other, the inner section being provided
with spring-pressed cams adapted to lock said sections while being propelled and
to release the same for coasting, circular flanges secured to the outer section, a
brake lever mounted on the inner section and having a friction clutch pivoted
thereon, a link rod pivoted on said lever, and a cog mounted on the pedal, said link
rod having a rack integral with the lower end, said cog being rigid with the pedal
and normally out of engagement with said rack.
4. A braking mechanism for velocipedes consisting of a lever mounted on one
section of a sprocket wheel and a friction clutch pivoted on said lever and adapted
::

page_text: to operate on the other section of said wheel, and means mounted on the pedal
adapted to operate said lever by a reverse motion of the pedal crank, one of said
wheel sections being adapted to run outside of and independent of the other.
5. In a sprocket wheel provided with annular flanges on the rim, said wheel
consisting of an outer rim and a central portion, a lever having a clutch mounted
on said central portion adapted to engage one of said flanges, a cog mounted on
the pedal, and a link rod having a rack integral with the lower end thereof whereby
said lever is operated.
6. A sprocket wheel constructed in two sections capable of independent rotation,
the other section being provided with annular flanges, the flange on one side being
integral therewith and the flange on the opposite side being riveted thereto, the
inner section being adapted to run in the annular space between said flanges, a
bell crank lever pivotally mounted on said inner section, a curved clamp mounted
on said section and pivotally connected to said lever, said clamp being adapted to
engage one of said flanges.
7. A sprocket wheel composed of two sections capable of independent rotation
and provided with a brake lever pivoted on the inner section, the outer section
being provided with flanges, one integral therewith and the other riveted thereto,
a clamp mounted on said inner section and adapted to engage one of said flanges
for braking purposes, said clamp being attached to said lever, and means for
operating said lever.
8. In a brake and coasting wheel the combination of two sections forming said
wheel, one section running within the other, the outer section being provided with
circular L-shaped flanges forming an annular space therein, the inner section
being adapted to run in said space, a bell crank lever and a clamp mounted on
said inner section, said clamp being attached to said lever, and adapted to engage
one of said flanges, triangular spring-pressed cams having pivotal bearings in
said inner section for locking said sections together for propelling purposes, a link
rod pivoted on said lever, and a clip mounted on the lower end of the pedal crank
adapted to guide said rod, said rod having a rack integral with the lower end
thereof, and a cog being rigid with the pedal and normally out of engagement with
said rack, but adapted to be engaged therewith for braking purposes.
9. In a brake and coasting sprocket wheel the combination of two wheel
sections, one section running within the other, the inner section being provided
with triangular spring-pressed cams adapted to lock said sections together for
propelling purposes, the other section being provided with circular flanges having
annular Hanges integral therewith, a iever pivoted on said inner section and
provided with means for engaging one of said flanges for braking purposes, a cog
mounted on the pedal, and a link rod attached to said lever, and provided with a
rack integral therewith adapted to engage said cog whereby said wheel can be
operated for propelling, coasting, and braking purposes.
10. A combined brake and coasting sprocket wheel composed of two sections
capable of independent rotation, means for locking said sections together, a friction
clutch mounted on one section, means for operating said clutch, and a bolt having
a head with sides unequally distant from the center of said bolt adapted to take
up the wear of said clutch.
Dated this 20th day of
100