Improvements in and connected with Bicycle Brakes.
Year: 1896

page_text: Date of Application, 28th Nov., 1896-Accepted, 6th Feb., 1897
COMPLETE SPECIFICATION.
Improvements in and connected with Bicycle Brakes.
I, EDGAR DESCUM MISNER, of 155 Simcce Street, in the City of Toronto, in
the County of York, in the Province of Ontario, Canada, Machinist, do hereby
declare the nature of this invention, and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement :-
My invention relates to improvements in bicycle brakes applicable to the pedal
axle and the object of the invention is to devise a simple and economical form of
brake, which will not deteriously affect the appearance of the bicycle and which
may be effectually operated simply by back pedalling, so as to stop the rotation of
the wheels and further to provide means in connection with such brake whereby the
sprocket wheels may be kept in chain line and it consists essentially of a sleeve
which is attached to or forms part of the sprocket wheel and extends inwardly into
the journal bracket and a ring-flange or collar secured on the crank axle preferably
at the opposite end from the sprocket wheel and designed to be brought in contact
with a friction dise in the end of the journal bracket, the, sleeve of the sprocket
wheel being made with oblique slots into which extend pins secured in the pedal
crank axle, a suitable spring being provided preferably secured at one end to the
sleeve and at the opposite end to one of the pins extending through one of the
oblique slots in the sleeve, the parts being otherwise constructed and arranged in
detail as hereinafter more particularly explained.
Fig. 1, is a sectional perspective view showing the parts involved in my inven-
tion, the sprocket wheel and sleeve being shown in section and the spring partially
broken away.
Fig. 2, is a section showing the pedal crank axle and sleeve also in section.
In the drawings like letters of reference indicate corresponding parts in each
figure.
.
A is the pedal crank axle, which may be made in any form desired either in two
pieces as shown with a jog connection in the centre or the axle may be made in one
piece and the cranks made separately therefrom. B is a sleeve having arms B' at
the outer end thereof, which form the arms or spokes of the driving sprocket wheel,
the im B2 of which is secured to the outer end of the arms or spokes as indicated
or in any other suitable manner. C is the journal bracket, D DI¹ the cups of the
ball bearings, which are externally threaded and screwed into corresponding
internally threaded ends of the journal bracket C. d d' are the balls and bare
the cones, which are screwed on to the exterior of the sleeve B, the cone b¹
being internally threaded, so as to fit over a correspondingly raised portion of the
sleeve B in proximity to the cup D'. The cone 6 is internally threaded and fits
over the threaded end of the sleeve B. 2 is an annular recess formed at the
exterior of the cup D and E is a ring disc made of fibre, wood, paper or any other
suitable material, which fits within the recess d².
A is a ring flange or collar, which is secured to or forms part of the pedal crank
axle A and is located in proximity to the friction disc E.
care disc plates, the exteriors of which are threaded and fit close to the cups D D¹
preferably at the bottom thereof and c' e' are set screws, which are screwed into
holes made in the bosses c³ forming part of the journal bracket C. The set

page_text: screws c¹ serve to hold the plates c firmly against the threaded cups D D' and
thereby clamp them and prevent any tendency of their unscrewing. is a slot
made in the bottom of the journal bracket and c is a plate, which is designed to
cover such slot. The plate may be secured to the journal bracket C by screws, so
that it may be readily taken off in order to enable the interior of the bracket and
mechanism to be easily gotten at.
bare two sets of oblique slots made in the sleeves B one set being
diametrically opposite the other. a¹ a¹ a¹ are two sets of pins of three pins each,
which extend into the axle A diametrically opposite each other and have their
heads extending out through into the oblique slots . The pins a¹ to the right
upper end of the sleeve is preferably made longer than the other pins and has
secured to it a bracket a³. F is a flat spiral spring, which is secured preferably
at one end by the pin f to the sleeve B. The other end of the spring F is turned
at about right angles to the spring and has a threaded hole f2 made in it. f3 is a
screw, which extends through a hole in the bracket a³ into the hole f³ in the end f¹
of the spring F.
It will be seen by turning this screws that the tension of the spring F may be
varied as desired. The tendency of the spring F is to hold the pins to the forward
end of the slot as to direction of rotation and consequently the ring flange A' from
contact with the friction disc E.
The direction of rotation of the sprocket wheel when driven is that indicated by
arrow. Should it be desired to put on the brake by back pedalling that is by
throwing the cranks in the direction indicated by arrow the pedal crank axle is also
thrown in the same direction bringing with it the pins a', which moving laterally
through the oblique slots in the direction indicated by arrow throw the crank axle
end wise in the direction indicated by arrow and thereby cause the ring flange A¹
to come in contact with and press against the friction disc E, thus effectually
forming a brake to stop the rotation of the sprocket wheel and consequently of
the driving wheel, which has a sprocket pinion that is connected by the usual
sprocket chain to the driving sprocket B2. As the sleeve B which is attached
to or forms part of the sprocket wheel is supported in its bearings as herein-
before described it will be perfectly understood that such sprocket wheel will
not be liable to move laterally as it would be if such sprocket wheel were
attached to the crank axle. Consequently the sprocket wheel B is always kept in
chain line.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. In a bicycle brake, the combination with the journal bracket and bearings
formed in the ends thereof, of the sprocket wheel, the sleeve attached to or
forming part of the same and securely held from lateral displacement in its
bearings and the pedal crank axle extending through such sleeve as and for the
purpose specified.
2. In a bicycle brake, the combination with the journal bracket and bearings
formed in the ends thereof, of the sprocket wheel, the sleeve attached to or forming
part of the same and securely held from lateral displacement in its bearings, and
the pedal crank axle extending through such sleeve and an adjustable frictional
connection between the sleeve and a stationary portion of the journal bracket
whereby upon back pedalling such frictional connection is thrown in as and for the
purpose specified.
3. In a bicycle brake, the combination with the journal bracket and bearings
formed in the ends thereof, of the sprocket wheel, the sleeve attached to or
forming part of the same and securely held from lateral displacement in its
bearings and the pedal crank axle extending through such sleeve, a friction
disc at the opposite end of the sleeve to the sprocket wheel and a ring flange
on the pedal axle adjacent to such friction disc and means for normally

page_text: holding such flange out of engagement with the friction disc and yet permit
it being brought into engagement by back pedalling as and for the purpose
specified.
4. In a bicycle brake, the combination with the journal bracket and bearings
formed in the ends thereof, of the sprocket wheel, the sleeve attached to or
forming part of the same and securely held from lateral displacement in its
bearings and the pedal crank axle extending through such sleeve, a friction disc
at the opposite end of the sleeve to the sprocket wheel, a ring flange on the pedal
axle adjacent to such friction disc oblique slots in the sleeve, pins secured in the
pedal crank axle and extending into the slots and means for normally holding the
pins against the ends of the slots nearer the friction disc as and for the purpose
specified.
5. In a bicycle brake the combination with the journal bracket and bearings
formed in the ends thereof, of the sprocket wheel, the sleeve attached to or
forming part of the same and securely held from lateral displacement in its
bearings and the pedal crank axle extending through such sleeve, a friction disc
at the opposite end of the sleeve to the sprocket wheel, a ring flange on the
pedal axle adjacent to such friction disc, oblique slots in the sleeve, pins
secured in the pedal crank axle and extending into the slots and a spiral spring
secured at one end of the sleeve and at the opposite end to the pin extending
through the oblique slot at the opposite end of the sleeve as and for the purpose
specified.
6. In a bicycle brake, the combination with the journal bracket and bearings
formed in the ends thereof, of the sprocket wheel, the sleeve attached to or
forming part of the same and securely held from lateral displacement in its
bearings and the pedal crank axle extending through such sleeve, a friction disc
at the opposite end of the sleeve to the sprocket wheel, a ring flange on the pedal
axle adjacent to such fiction disc, oblique slots in the sleeve, pins secured in the
pedal crank axle and extending into the slots, a spiral spring secured at one end of
the sleeve and having the other end bent, a bracket secured on the top of the
pin extending through the slot at the opposite side of the sleeve and a set screw
extending through such bracket and the turned end of the spring as and for the
purpose specified.
7. In combination the journal bracket, the end cups, the sprocket wheel, the
sleeve attached to or forming part thereof and having threaded ends, the cones
screwed on to the ends, the balls between the cones and the cups, the recess in
the outer end of one cup, the friction disc inserted therein, the pedal crank axle
having a ring flange located adjacent to the friction disc, oblique slots in the
sleeve, pins secured in the pedal crank axle and extending into the slots and
the spiral spring secured at one end of the sleeve and at the opposite end to a
pin extending through the slot nearest the friction disc as and for the purpose
specified.
Dated the 20th IN
11000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.