Improvements in and relating to Rim Brakes for Cycles.
Year: 1899

page_text: Date of Application, 12th Oct., 1899
Complete Specification Left, 12th July, 1900-Accepted, 6th Oct., 1900
Improvements in and relating to Rim Brakes for Cycles.
I, JAMES RICHARD TRIGWELL, of 146, Brixton Hill, in the County of Surrey,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to rim brakes for cycles of the kind in which the brakes
are applied by levers pivotted on the handle bars. The object of this invention
is to provide each wheel of the cycle with a rim brake and to connect both with
the handle bar lever so that both are simultaneously operated by said handle bar
lever. A further object of the invention is to economise cost and time in the
manufacture and method of fitting the brake blocks and other parts.
According to this invention the brakes are connected to shoes mounted on
stirrup shaped carriers. The front brake carrier is connected by a metal rod to
the handle bar lever which, in this case, is mounted as a lever of the second order,
so that when said lever is raised the stirrup shaped carrier and the brake blocks
are brought up to the rim of the front wheel. The brake shoes are provided with
projections or abutments which take a bearing on the rear side of the front fork
member. The brake shoes are connected by suitable springs to elips on the front
fork members so as to remove the brake blocks from the operative position when
the lever handle is released.
The rear brake is mounted in the following manner.
The handle bar lever is provided with a curved extension roughly conforming
to the shape of the central part of the handle bar. This curved extension is
connected. to one end of a wire cable or other flexible connection which is passed
through an aperture, made to receive it, in the central part of the steering tube,
and passes out at the bottom thereof between the members of the front fork.
At this part the cable or other flexible connection is passed through a curved guidé
tube secured by clips or other means to the down tube member of the cycle
frame. From this curved tube the cable is passed under the crank bracket and
connected to a stirrup shaped carrier on the ends of which the brake blocks are
mounted as with the front brake, and the brake shoes are also provided with
suitable projections or abutments resting on or against the rear fork members.
For the purpose of obtaining greater power on the rear brake I may secure
the cable or connection to the end of a lever centred on the cycle frame, to which
lever the stirup carrier is linked.
The cable or other flexible connection is provided with suitable means for
adjusting its length so that the blocks of both brakes may touch the respective
rims simultaneously. Preferably I connect the ends of two sections of the cable
to lengths of U shaped steel which slide over one another and are secured together
by a saddle clamp with a set screw carrying a curved block fitting the U shaped
steel.
The stirrup carriers are made out of steel rod of round or square section, bent
By this construction
to shape and the ends turned up to carry the brake shoes.

page_text: the carriers are comparatively cheap and are stronger than carriers made from
stampings or malleable castings as heretofore.
The brake shoes are made from one piece of flat metal bent to double channel
form, one channel is fitted over the end of the stirrup carrier, the brake block is
placed in the outer channel, and the shoe is secured to the carrier and the block
to the shoe by one or more bolts passed transversely through both channels and
the block securing all together.
101
Improvements in and relating to Rim Brakes for Cycles.
I, JAMES RICHARD TRIGWELL, of 146, Brixton Hill, in the County of London,
Cycle Manufacturer, 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 rim brakes for cycles of the kind in which the brakes
are applied by levers pivotted on the handle bars. The object of this invention
is to provide each wheel of the cycle with a rim brake and to connect both with
the handle bar lever so that both are simultaneously operated by said handle bar
lever. A further object of the invention is to economise cost and time in the
manufacture and method of fitting the brake blocks and other parts.
In the accompanying drawings Fig. 1 is a side elevation of part of a cycle with
my invention applied thereto; Fig. 2 is a front elevation of part of the handle
bar and brake lever, and Figs. 3 to 5 are details of construction which will be
fully referred to hereinafter. The same parts are lettered to correspond in the
various figures.
According to this invention the brakes are connected to shoes A mounted on
stirrup shaped carriers B. The front brake carrier B is connected by a metal
rod C, which is adjustable in the ordinary way, to the handle bar lever D, which
latter is mounted as a lever of the second order on the clip E, secured to the
handle bar F', so that when said lever D is raised the stirrup shaped carrier B
and the brake shoes A carrying the brake blocks a, are brought up to the rim of
the front wheel. The brake shoes A are provided with projections or abut-
ments G which take a bearing on the rear side of the front fork member H, as
shown in Fig. 1. The brake. shoes A are connected by suitable springs J to
clips K on the front fork members so as to remove the brake blocks from the
operative position when the lever handle 1) is released.
The rear brake is mounted in the following manner.
The handle bar lever 1 is provided with a curved extension d, roughly con-
forming to the shape of the central part of the handle bar, see Figs. 1 and 2.
This curved extension d is connected to one end of a wire cable or other flexible
connection M which is passed through an aperture, made to receive it, in the
central part of the steering tube N, and passes out at the bottom thereof between
the members of the front fork H. At this part the cable or other flexible
connection M is passed through a curved guide tube secured by clips or other
means to the down tube member Q of the cycle frame. From this curved
tube the cable is passed under the crank bracket L and is connected to a

page_text: stirrup shaped carrier B on the ends of which the brake shoes A carrying the
brake blocks are mounted, as with the front brake, and the brake shoes A are
also provided with suitable projections or abutments G resting on or against the
rear fork members R, and are attached to springs secured to clips
purpose of normally keeping the brake off the wheel rim.
for the
For the purpose of obtaining greater power on the rear brake I may secure the
cable or connection M to the end of a lever centred on the cycle frame, to which
lever the stirrup carrier B is linked in any suitable manner.
The cable or other flexible connection M is provided with suitable means for
adjusting its length so that the blocks of both brakes may touch the respective
rims simultaneously. The means for adjusting the cable or other flexible
connection M which I prefer to employ are shown in Figs. 3 and 4, Fig. 3 being
a longitudinal elevation and Fig. 4 a section on the lines 4-4 of Fig. 3. In this
construction I connect the ends of two sections of the cable M to lengths of
U shaped steel S, S¹ which slide over one another and are secured together by a
saddle clamp T with a set screw t carrying a curved block fitting the inner
U shaped steel S¹.
The stirrup carriers B are made of steel rod of round or square section, bent
to shape and the ends turned at right angles to carry the brake shoes, as shown
at in Figs. 1 and 5. By this construction the stirrup carriers B are compara-
tively cheap and are stronger than carriers made from stampings or malleable
castings as heretofore.
Fig. 5 is an enlarged cross section of one of the brake shoes and its connected
parts. The brake shoes A are made from one piece of flat metal bent to double
channel form, as shown. One channel is fitted over the right angled end b,
of the stirrup carrier B, the brake block is placed in the outer channel, and the
shoe A is secured to the carrier B, and the block a is secured in the shoe A, by
one or more bolts g passed transversely through both channels of the shoe A and
through the block a securing all together, as shown. In this figure I have also
shown the projections or abutments G made in one piece with the screw, but
obviously the projection G may be made separate from the screw g if so desired.
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. In rim brakes for cycles, a front wheel brake connected to the handle bar
lever, and a rear wheel brake connected by a flexible connection to an extension
on said lever substantially in the manner and for the purpose hereinbefore
described and illustrated in Fig. 1 and 2 of the accompanying drawings.
2. In cycle rim brakes, a rear wheel brake operated from the handle bar by
means of a flexible connection which passes through an aperture in the handle
bar into the interior of the steering tube and from thence is carried to the rear
fork member through which has a curved guide tube one end in the steering tube
while the other end is secured to the cycle frame, substantially as described with
reference to Fig. 1 of the accompanying drawings and for the purpose stated.
3. In cycle rim brakes, a stirrup carrier made of wire bent to shape and having
a right angled member on each side to which a double channel brake shoe is
secured by a bolt or bolts passed through the brake block and through both
channels of the shoe, substantially as and for the purpose hereinbefore described
with reference to Figs. 1 and 5 of the accompanying drawings.
Dated this 12th day of July 1900.
'
F. W. GOLBY,
Patent Agent,
36, Chancery Lane, London, W.C.,
Agent for the Applicant.