Improvements in and relating to Brakes for Velocipedes.
Year: 1899

page_text: Date of Application, 25th Jan., 1899
1
AL
1000
1000
PROVISIONAL SPECIFICATION.
Improvements in and relating to Brakes for Velocipedes.
I, SAMUEL ALLEN, of 4, Stratford Villas, Heaton, Newcastle-on-Tyne, in the
County of Northumberland, Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to brakes for bicycles and other velocipedes, and it con-
sists of improvements in that type of brake acting on the rear-driving wheel
and adapted to be applied by exerting back pressure on the driving cranks.
According to this invention, a suitably shaped lever is pivoted to a bracket
formed on or carried by the members of the lower back fork in any convenient
position between the periphery of the driving wheel and the pedal-crank axle
bracket, the said lever carrying any suitable form of brake shoe adapted to act
either on the tyre or rim of the wheel. To this lever is attached either directly
or indirectly a pawl or its equivalent adapted to engage with the teeth of the
driving chain wheel on the pedal-crank axle and kept into engagement therewith
either by a light spring or by its own weight, the arrangement being such that
when the driving chain wheel is rotating in a forward direction-as when the
machine is being driven ahead--the pawl or its equivalent rides lightly over the
teeth of the chain wheel, but when back pressure is exerted on the one or other of
the driving cranks the backward motion of the chain wheel causes the pawl to
engage with its teeth and thereby impart a rocking motion to the arm carrying
the brake shoe whereby it is caused to come into operative contact with the tyre
or rim of the driving wheel.
It will be understood that this type of brake is only applicable to those cycles
having what is known as a tree wheel," that is to say, in which the driving
motion of the pedal-crank axle is imparted to the driving wheel of the cycle by
means of a clutch so that the said wheel will overrun the driving gear when the
cranks are held stationary.
Improvements in and relating to Brakes for Velocipedes.
I, SAMUEL ALLEN, of 4, Stratford Villas, Heaton, Newcastle-on-Tyne, in the
County of Northumberland, Engineer, do hereby declare the nature of this inven-
tion 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 back pedalling brakes for bicycles and other velocipedes

page_text: having what are known as free wheels," and it consists in imparting the necessary
motion to the operative part of the brake through the medium of a clutch
engaging and set in motion by the sprocket wheel on the pedal crank axle.
In the accompanying drawing which illustrates this invention:-
Figures 1 and 2 are views in side elevation and plan respectively showing one a
form it may assume, and
Figure 3 is a view in side elevation showing a modification.
Throughout the views similar parts are marked with like letters of reference.
On the lower back fork X of the machine in any convenient position between
the periphery of the driving wheel Y and the pedal-crank axle bracket Z is fixed
a depending bracket A in which is mounted a shaft B which carries an arm or
lever C which is connected by means of a horse-shoe shaped link Dor its equivalent
with the operative mechanism of the brake which may conveniently consist of
a pair of arms E, E, pivotted to brackets E¹, E', mounted on the members of
the lower back fork X as shown in the drawing, the said arms carrying blocks
or shoes e, e, adapted to engage the rim of the wheel Y, but any other type of
brake may be employed. To return the arm or lever U to its normal position
mn which the brake blocks are clear of the rim of the wheel any suitable form
of spring such as G may be employed. On the shaft B is loosely mounted a
pawl Fadapted to engage with the teeth of the sprocket wheel V on the pedal-
crank axle W and kept into engagement therewith either by a light spring or by
its own weight, the arrangement being such that when the sprocket wheel is
rotating in the direction of the arrow to propel the machine forward, the pawl F
rides lightly over its teeth, but when the sprocket wheel is rotated in a backward
direction by exerting back pressure on one or other of the driving cranks w,
its teeth engage the pawl and depress it until it comes into contact with a
projection on the shaft B and thereby imparts motion to the arm or lever C
which brings the brake blocks or shoes c, e, into operative contact with the rim
of the driving wheel.
Instead of using a pawl to engage the teeth of the sprocket wheel, a small
toothed pinion H loosely mounted on the rocking shaft. B and connected there-
with by any suitable form of clutch-such as that shown by Figure 3-may be
employed.
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) The combination of parts herein described and illustrated by the accom-
panying drawing forming an improved method of applying brakes to velocipedes
by back-pedalling.
(2) A brake for velocipedes adapted to be put in operation by back-pedalling
consisting of a rocking lever adapted to give the necessary movement to the
operative part of the brake, the said lever being connected with the sprocket
wheel on the pedal-crank axle by any suitable form of clutch, so that the sprocket
wheel when caused-by back pedalling-to rotate in the opposite direction to
that in which it rotates when the velocipede is being propelled forwards will
impart to the lever the necessary movement to apply the brake but when revolving
in the opposite direction is inoperative with respect to the said lever, as set
forth.
ed this 17th day of November 18JJ,
ROBERT E. PHILLIPS, Assoc. M.Inst.C.E., M.I.Mech. E.,
Chartered Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.