A Bake for Velocipedes.
Year: 1897

page_text: Date of Application, 3rd Nov., 1897
Complete Specification Left, 28th Jan., 1898-Accepted, 17th Sept., 1898
A Bake for Velocipedes.
WILLIAM HENRY TOMKIES, Engineer, 5, South Street, Ponders End, N.,
WILLIAM SAMUEL WEBB, Wharfinger, 35, Curlew Street, Horselydown, London,
S.E., do hereby declare the nature of this invention to be as follows:
Brake made in three parts.
(1) A collar (screwed internally) with angle catch pieces.
(2) A chain wheel to consist of angle slots, teeth to carry chain and a cone, cup,
or flat surface to act as brake.
(3) A cone, cup, or flat surface to be fixed to frame of machine (with or without
leather, wood or other material ring).
The collar is fitted within the chain wheel. Back pressure on the peddles causes
the angle catch pieces to press the cone, cup, or flat surfaces, on chain wheel
against fixed cone, cup, or flat surface on frame.
Dated this 3rd day of November 1897.
WILLIAM HENRY TOMKIES.
WILLIAM SAMUEL WEBB.
WILLIAM HENRY TOMKIES, Engineer, 5, South Street, Ponders End, N.,
WILLIAM SAMUEL WEBB, Wharfinger, 35, Curlew Street, Horselydown, London,
S.E., 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:―
This invention relates to improvements. in velocipedes and the like and more
particularly to that form of velocipede which is commonly known as the safety
bicycle. Our invention consists in an improved construction of back pedal brake.
In the accompanying drawings
Figure 1 is a view in side elevation of part of a bicycle fitted with this invention
at S.
Figure 2 is a plan shewing the brake fitted to the axle and hub.
Figure 3 is a sprocket wheel with cone or cones, and clutches attachel.
Figure 4 is a face view of the sprocket wheel shewing angle clutches.
Figure 5 is a face view of the outer cone or cones.
Figure 6 is a wood ring.
Figure 7 is a side view of the outer cone or cones.
Figure 8 is a view of an inner collar which is fastened to the hub- within
the sprocket wheel

page_text: Figure 10 is an opposite face view of the inner collar.
Figures 11 & 12 are views of one form of spring.
Figure 13 shews part of our invention on hub, the inner collar forming part
of the hub.
In the drawings, Fig. 2, A is the spindle and R the hub of the rear driving
wheel, the collar B is fastened to the hub at L and the sprocket wheel C is made
to slip over the inner collar B, so that a rotary movement backwards and forwards
and also a slight lateral movement in and out is obtained on back pedalling. The
lateral movement being caused by the faces of the clutch at D & D sliding against
one another, the effect of which is to force the cone at E into the fixed cone F
thereby causing a brake. G, Fig. 8, shew a split ring enclosed within the
sprocket wheel to retard the rotary movement of the sprocket wheel upon the
inner collar, and prevents the brake being put in or out of action without some
force being exerted. Instead of, or in conjunction with, the later spring Ga
spring Figs. 11 & 12 and as shewn in Fig. 2, H, may be employed. This may
be screwed to the collar B at J or fitted in a small slot at I, the action of this is
to hold the sprocket wheel against the angle catch pieces of the inner collar and
when the back pressure is brought to bear on the pedals to force the sprocket
wheel against the cone by the action of the turned end of the spring against the
inclined inner face of cone at K. In Figure 3, a double form of cone is shewn.
E representing one cone, and M an inner cone, either one or the two cones may
be employed, which presses when in action into the cone or cones F & N,
Figure 7. This cone may be lined with wood or other frictional material. The
cone or cones Figure 7 is screwed on the axle at P, Figure 2, and slides in the frame
of the bicycle at Q. Instead of cones E & F being used a cup or cups with the same
action might be employed. Instead of loose springs as at G and H the collar
Figure 8 may be split to form, spring, the result obtained being same as if employ-
ing a loose spring G Fig. 8, or springs O Fig. 4 may be fastened to the back face
of the sprocket wheel for a like result. In the drawings Figs. 8, 9, & 10, three
clutches are shewn but it is obvious that any number may be used. This brake
may be applied to the driving sprocket wheel if desired the same effect being
obtained.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed we declare that what we
claim is:-
1. Brake mechanism operated by back pressure on the pedals having for its
frictional surfaces cones or cups in combination with clutch that can be fitted
to any existing velosipede without alteration to frame, arranged & operating as
herein before described & illustrated by the accompanying drawings Figures 1 to 13.
2. A brake that can be fitted to any existing ordinary safety bicycle without
alteration to frame, the sprocket wheel on the rear driving wheel only having to
be replaced by the sprocket wheel with cone, cones cup or cups and clutch attached
as set forth.
3. A brake mechanism that is released immediately a forward pressure is applied
as set forth.
4. A brake mechanism that when once the back pressure is applied the brake
continues on without any further pressure as set forth.
5. A brake mechanism having for its frictional surfaces an inner and outer
cone, cones cup or cups as set forth.
Dated this 28th day of January 1898.
WILLIAM HENRY TOMKIES.
WILLIAM SAMUEL WEBB.