Year: 1896

page_text: I, HERBERT GODSAL of 13 Bruton Street, Berkeley Square, London, W., Barrister-
at-Law, do hereby declare the nature of this invention to be as follows:-
My invention relates to a brake which is applied to the hub of the cycle or
other wheel.
I provide a tube of any suitable metal or other substance which is closed at
each end and normally of circular or horseshoe shape, but sufficiently flexible to be
expanded. This tube is fixed by means of a carrier on the spindle of the wheel
or other suitable device in such a position that it lies within the hub of the wheel
but normally does not touch the said hub. A small pipe communicating with the
interior of the circular or horse shoe shaped tube is carried to the place from which
it is desired that the brake shall be operated.
The circular or horse shoe shaped tube, together with the pipe is filled with any
suitable fluid or gas and the brake is actuated by increasing at will by means of a
piston or other well known device the pressure of the fluid or gas within the circular
or horseshoe shaped tube and pipe and thus expanding the circular or horseshoe
shaped tube till it presses against the inner side of the hub and so brakes the
wheel.
The outer surface of the circular or horse shoe shaped tube may be provided with
removeable blocks which may be readily removed when worn.
Dated this 28th day of October 1906
I, HERBERT GODSAI, of 13 Bruton Street Berkeley Square London, W., Barrister-
at-Law 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 stateinent :-
My invention relates to a brake which is applied to a cycle or other wheel.
In order that my invention may be readily understood I will now proceed to
describe with the aid of the accompanying drawings how the same is to be
carried out.
In the drawings
Figure I is a face view of the rear sprocket wheel provided with brake drum and
mechanism fixed in position on a bicycle.

page_text: Figure II is a face view of the brake drum and mechanism.
Figure III is an edge view, partly in section, of brake mechanism.
The same letters indicate the same parts in each of the figures.
I provide a tube A. of any, suitable metal or other substance which is closed at
each of its ends a 1, and a 2, of circular or horse shoe shape; but sufficiently flexible
to expand as is shewn at a 3 in Figure 3, when filled with any fluid or gas under
pressure.
This tube A. A. is fixed on to a circular carrier B. B. which in its turn is fixed
around the spindle S. at 8 1. where S. is of square transverse section; thus when the
spindle S. is fixed and prevented from turning the carrier B. B. cannot turn
either.
Obviously I may use any other device for fixing the carrier B. B. in its proper
place so that it cannot turn.
C. is the sprocket wheel, with a flange c 1. overhanging the tube A. A. D is a
steel spring coiled around the periphery of the tube A. A. this helps to retain the
tube A. A. in its norinal position so that it does not anywhere press the spring D
against the sprocket wheel flange 1. The spring D is also of use to take the wear
and tear of the brakeing.
A small power pipe E. joining the tube A. at any suitable position in its length,
such as at F, conveys the hydraulic or other compressing power into the tube A.
from any source of compression power towards the end E 1. of the power pipe E,
from which end the power of the brake is operated.
The circular or horse shoe shaped tube A. together with the power pipe E. being
filled with any suitable fluid or gas, the brake is actuated by increasing at will by
means of a piston or any other well known device the pressure in the power pipe E.
which transmits it to the tube A. causing it to swell outwards and force the spring D
(when provided) against the sprocket wheel flange c1 which tends by friction against
the flange C. 1. to prevent the sprocket wheel C. from revolving and so brakes the
hub and consequently the wheel.
The outer surface of the horse shoe shaped tube A may be provided on its outer
side with removeable blocks or the spring D. may be provided with them (if used)
which can be readily removed when worn and replaced by other. The brake is
released, by relieving the pressure in the power pipe E, by any known or suitable
means.
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.
Braking mechanism applicable to the sprocket wheel of a bicycle consisting of
the combination of a flexible tube with a carrier and a pipe connecting with the
source of power as and for the purposes hereinbefore described.
Dated the 28th day of July 1897.
HERBERT GODSAL.