An Improved Brake for Cycles.
Year: 1894

page_text: Date of Application, 1st Nov., 1894
Complete Specification Left, 31st July, 1895-Accepted, 31st Aug., 1895
PROVISIONAL SPECIFICATION.
An Improved Brake for Cycles.
We, OSWALD SAMUEL WRAITH of 56 Bolton Road, Surgeon, and JOHN
WILLIAM DEAN of 1 Holker Street, Sanitary Pipe Maker, both of Darwen in the
County of Lancaster, do hereby declare the nature of our said invention to be as
follows:-
This invention relates to an improved brake for cycles and consists in mounting
on the fork or bar a pulley with a semi-circular or concaved rim to fit the pneumatic
or other rim of the front or other wheel of a cycle. Above this pulley
mounted
a block of wood or other suitable material attached to the brake rod in any
convenient manner. The wood or other block is constructed to fit into the pulley
that operates and rotates with the cycle wheel. This invention is designed to
protect pneumatic and other tyres from the destructive action of brakes at present
employed.
Dated the 30th October 1894
EDMUND CHADWICK, F.I.C.P.A.,
Agent.
An Improved Brake for Cycles.
I OSWALD SAMUEL WRAITH of 56 Bolton Road, Surgeon, and JOHN
WILLIAM DEAN of 1 Holker Street, Sanitary Pipe Maker, both of Darwen, in
the County of Lancaster, 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 and accompanying drawings :-
This invention refers to an improved brake for cycles and consists in mounting
on the fork or bar a pulley with a semi-circular or concave rim to fit the pneumatic
or other tyre of the front or other wheel of the cycle. Above this pulley is
mounted a block or pad of any suitable material attached to the brake rod in any
convenient manner. The said block or pad is constructed to fit into or press upon
the pulley that operates and rotates with the cycle wheel.
designed to protect pneumatic and other tyres from the destructive action of brakes
at present employed.
This invention is
To render our invention clearly understood we will now proceed to describe the
same more particularly and with the assistance of the annexed sheet of illustrative
drawings to which we will refer in the course of our description.
Fig. 1 is a side elevation of a portion of the front of an ordinary safety bicycle
with pneumatic tyres to which our improved brake is shown applied the brake
being shown off.
Fig. 2 is a front view at right angles to Fig. 1.
Fig. 3 is an enlarged sectional view of the concave pulley forming a part of the
braking arrangement.
The steering post of the bicycle is marked a, the handles b and the pneumatic
tyre of the front wheel c. We provide a pulley d of a concave or grooved form

page_text: g
as plainly shown in the drawings, this pulley being made of any suitable material
either solid or hollow but preferably of aluminium or other light metal or material.
The concave periphery is turned or finished so as to present a smooth or com-
paratively smooth surface to the tyre. The pulley d runs on a stud e and is held
in a light bridle or jaw composed of two side members fand a cross piece f¹.
Through the cross piece there passes a rod a the lower end being fitted or provided
with a frictional block or pad g which might be composed of leather, rubber,
woodite or other suitable material or compound, or which might consist of a block
or shoe of wood, metal or other substance. The upper end of the rod g enters a
tubular sleeve the rod g being adjusted to any desired position in the sleeve h
and secured in that position by means of a pinching screw 92 passing through
the eye g³. The bridle ff carrying and containing the pulley d is held by a coiled
spring against a cross pin g* which passes through the rod g the spring being
compressed between the cross piece and the abutment formed by the eye 9" which
is fixed and adjusted by the pin or set screw gº.
Thus in its normal position the spring i holds the friction pad g clear of the
periphery of the pulley d while at the same time if sufficient force is applied, the
pad can be brought down upon the periphery of the pulley. The upper end of
the sleeve his pivotted by a stud j to a brake lever k which is similar to existing
brake levers and is pivotted at k¹ beneath the right handle b in the ordinary manner
A spring or any other suitable spring keeps the brake handle in such a position
as to hold the brake pulley d out of contact with the tyre c. The stud e which
carries the pulley d is connected by radial side links m to a fixed point such as n
on the steering post or front fork. The members f, f, f¹ and m m constitute a
loosely jointed swing frame anchored at n and having a free and easy motion.
We
might however support the rods h, g in eyes to slide in a straight line towards and
from the tyre c.
When it is desired to operate our improved brake the rider of the machine
presses the brake lever k in the ordinary manner and thus pushes down the sleeve
and rod hy so as to lower the pulley d upon the periphery of the tyre c, the pulley d
being immediately revolved by its frictional contact therewith. Continued pressure
next overcomes the resistance of the coiled spring i and allows the friction pad gl
to be pressed upon the upper side of the concave periphery of the pulley d. This
immediately retards the revolution of the pulley which in its turn resists the
revolution of the tyre although never so strongly as to absolutely arrest its
rotation.
The downward pressure of the pulley upon the tyre compresses the latter so as to
fill the groove of the pulley and the differential speeds of the various parts of the
pulley and tyre peripheries distribute the frictional resistance between pulley and
tyre so evenly that the tyre is never unduly taxed or strained nor is there any
possibility of accident from too sudden stoppage or the tearing! away of the
pneumatic tyre.
It will be evident that the invention is chiefly useful in connection with pneumatic
tyres, but we do not limit its application to this as the brake might be used for
ordinary cushion or rubber tyres and for the wheels of every description of
vehicle.
We
e prefer to combine the aforesaid friction pad g¹ with the pulley d but we might
in some cases dispense with such friction pad and use the pulley d alone.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is.
1. The improved brake for application to the pneumatic or other wheel tyres of
velocipedes and other wheeled vehicles substantially as hereinbefore described and
as illustrated in the accompanying drawings.
2. The improved velocipede wheel-brake, consisting of the combination of the
brake lever k, adjustable rod h, g with friction pad or block g' and spring i and the

page_text: grooved or concave pulley d supported in a jointed anchored swing frame or bridle
or its equivalent substantially as described and as illustrated.
3. In a brake of the indicated nature the pulley d with grooved or concave
periphery and used either in conjunction with or apart from the secondary friction
pad or block g¹ substantially as described and shown.
Dated this 30th day of July 1895.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.