Improvements in Brakes for Velocipedes.
Year: 1895

page_text: Date of Application, 27th Sept., 1895-Accepted, 2nd Nov., 1895
COMPLETE SPECIFICATION.
Improvements in Brakes for Velocipedes.
I, VIBERT COLLINSON, of Greystoke, Osborne Road, Levenshulme, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention, and
n what manner the same is to be performed, to be particularly described and
scertained in and by the following statement:-
This invention relates to brakes of the band type, for velocipedes, and its objects
are to so construct such brakes that they may be closed and protected from dirt
and dust, and so that the pull upon the band will not cause it to twist.
In constructing a brake according to this invention, a drum is rigidly fixed to,
One end of
or forms part of, a wheel of the machine, for instance the chain wheel.
the drum is enclosed or is provided with a loose frame, arm or disc, hereinafter
called the "disc," capable of revolving therein or thereon, and having a central
opening for the passage of the wheel axle. The disc has secured to it one end of
the brake band and is prevented from rotating with the drum by being attached
The brake band is contained in the
to a suitable part of the machine framing.
space between the loose disc and the end of the drum, and its free end is attached
to a stud which passes through the disc and is connected with the brake handle.
It is preferred to attach the free end of the brake hand to a collar or the like,
which rotates upon an internal projection on the loose dise and which is concentric
with the axle, the brake handle being connected to the collar. By this arrange-
ment, no twisting strains are set up in the band. In action, the brake band comes
into contact with some part of the inner face of the drum.
In order that my invention may be more readily understood, I have appended a
sheet of drawings, to which reference is hereinafter made. The drawings illustrate
my improved brake as applied to the chain wheel of a bicycle, and similar letters
of reference are employed to denote similar parts where they are represented in
the different figures.
Figure 1 illustrates the brake partly enclosed in the drum, and partly with a
portion of the loose disc shewn as broken away.
Figure 2 shews the device by means of which the brake band is secured to the
loose disc, and the disc fixed to the framing of the machine.
Figure 3 is a representation of a cross section of the drum and brake, following
the line h-h, in Figure 1.
A, is the chain wheel, which may be attached to or form part of the drum B.
In the form illustrated, it is shewn secured to lugs on the drum by the screws C,
the drum being screwed upon a bush D, which is keyed or otherwise suitably fixed
upon the axle. F, is a loose disc closing the open end of the drum, and having
attached to it, by means of the bolt G, one end of the brake band H. The bolt G
is secured to the loose disc F, and may be attached to any part of the framing of
the machine in a suitable position, to hold the disc fast as the drum rotates. The
band is contained in the drum and is held just out of contact with the inner part of
its rim I, by means of its springy construction, or by the aid of an additional
spring. The other end of the band is attached to a bolt J, which passes through
a slot in the disc F, and is connected by rods or similar means to the brake handle.
The preferred method of attaching the band to the bolt J, is to secure both to a
ring or the like, K, which is capable of rotating upou an internal projection from
the disc F. The bolt has a limited movement in the slot, the position of which is
shewn in its
indicated by the dotted lines L, Figure 1. In this figure, the brake

page_text: inoperative position. If it be desired to apply the brake, the 'handle is compressed,
the bolt J moves in the direction of the arrow, and the radius of the circle in which
the band lies is increased to an extent which causes the band to come against the
inner surface of the rim of the drum, thus retarding or checking the rotation of the
chain wheel. When the brake handle is released, the band returns to its original
smaller radius.
It will, of course, be understood that the drum may form part of or be attached
to any other convenient wheel or rotating part of the machine.
If desired, balls or other suitable antifriction devices may be interposed between
contiguous parts of the loose disc and of the drum.
In an alternative form of the brake, the band may be arranged to surround and
contract upon a suitable ring or annular projection formed upon the internal face of
the end of the drum, in which case the end of the band may be connected to a ring
similar to the ring K, but the band is contained within this ring instead of
surrounding it. The ring then revolves within a flange or the like, formed on the
inner face of the loose disc F.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. A brake for velocipedes, constructed arranged and operated substantially as
hereinbefore described with reference to the accompanying drawings.
2. In a brake for velocipedes, a band having one end attached to a relatively
fixed point and the other end to a revolvable ring or the like, constructed and
arranged substantially as herein before described and as illustrated by the accom-
panying drawings.
3. A brake for velocipedes consisting essentially of a drum, a loose "disc," a
band having one end attached to the disc, and a rotatable ring or the like to which
the other end of the band is attached, all constructed arranged and operating
substantially as hereinbefore described with reference to the accompanying
drawings.
Dated this 26th day of September A.D. 1895.
W. E. HEYS & SON,
Agents for the Applicant.