Year: 1898

page_text: Date of Application, 13th Sept., 1898
Complete Specification Left, 8th June, 1899-Accepted, 8th July, 1899
I, FREDERICK ARNOLD RODEWALD, of Heathfield House, Wimbledon Common,
in the County of Surrey, Gentleman, do hereby declare the nature of this invention
to be as follows:
_
The
According to my invention I construct a bicycle brake as follows.
brake rod, which may be of any suitable known arrangement but is by pre-
ference of that construction in which it passes down centrally through the tubular
pillar of the steering fork, carries at its lower end a fork, the limbs of which
have spring action and are arranged to pass down on each side of the rim and tyre
of the steering wheel, between this and the limbs of the steering fork, being
extended to a certain distance below the rim of the wheel, where they have
brake blocks fixed to or formed upon them. These brake blocks have such a form
that when the brake rod and its fork are raised upward and at the same time
are moved inward towards each other, they bear against the curved under surface
of the wheel-rim, and thus exercise an effective braking pressure thereon. The
upward motion of the brake rod and fork for the above purpose can be effected
by any known lever or excentric device arranged in connection with the brake rod
and handle bar; the inward motion on the other hand is effected by means of
inclines or curved blocks, attached to the steering fork, which inclines as the
brake blocks are raised up, press on the back surfaces thereof so as to force them
inwards.
On lowering the brake rod again, the limb of its fork spring outward and thus
remove the blocks from the wheel rim.
The said inclines or curved blocks may be variously arranged on the steering
fork; by preference I form them on metal clips that pass round the fork limb,
and are secured by screws so as to be firmly fixed on the fork. By this means the
inclines or curved blocks can be accurately adjusted in position relatively to the
brake blocks for producing the correct action thereof, the inclines being by
preference provided with lateral flanges between which the brake blocks slide.
The limbs of the brake fork can also be made adjustable in length if desired.
Dated this 13th day of September 1898.
ABEL & IMRAY,
Agents for the Applicant.

page_text: and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
According to my invention I construct a bicycle brake as follows.
The brake rod, which may be of any suitable known arrangement but is by pre-
ference of that construction in which it passes down centrally through the tubular
pillar of the steering fork, carries at its lower end a fork, the limbs of which
have spring action and are arranged to pass down on each side of the rim and tyre
of the steering wheel between this and the limbs of the steering fork, being
extended to a certain distance below the rim of the wheel, where they have
brake blocks fixed to or formed upon them. These brake blocks have such a form
that when the brake rod and its fork are raised upward and at the same time
are moved inward towards each other, they bear against the curved under surface
of the wheel-rim, and thus exercise an effective braking pressure thereon. The
upward motion of the brake rod and fork for the above purpose can be effected
by any known lever or excentric device arranged in connection with the brake rod
and handle bar; the inward motion on the other hand is effected by means of
inclines or curved blocks, attached to the steering fork, which inclines, as the
brake blocks are raised up, press on the back surfaces thereof so as to force them
inwards.
On lowering the brake rod again, the limbs of its fork spring outward and thus
remove the blocks from the wheel rim.
The said inclines or curved blocks may be variously arranged on the steering
fork by preference I form them on or secure them to metal clips that pass round
the fork limb, and are secured by screws so as to be firmly fixed on the fork. By
this means the inclined or curved blocks can be accurately adjusted in position
relatively to the brake blocks for producing the correct action thereof. The limbs
of the brake fork can also be made adjustable in length if desired.
On the accompanying drawing is shewn by way of example one arrangement for
carrying out my above described invention.
Fig. 1 shews a part front elevation of a steering fork with my invention applied
thereto. Fig. 2 shews a vertical cross section, and Figs. 3 and 4 shew perspective
views of the brake fork and clip with spring incline, detached.
A is the brake fork carried by the rod B passing up through the steering fork
pillar. The limbs A' of the fork are suitably formed to carry the brake blocks (
adapted to be brought into contact with the wheel tyre D; the limbs A¹ are formed
with bends at A2 which lie upon inclines E formed with spring action, for which
purpose they are constructed of curved steel blades, the lower ends of which are
joined on to the clips F on the limbs of the steering fork, which clips at the
same time constitute guides F for the lower ends of the fork limbs A¹. On
subjecting the fork A to an upward pull, the inclines E will force the limbs A¹
inwards so as to cause the blocks C to be pressed firmly against the wheel rim. On
lowering the brake fork again (which may be effected by a spring at (i) the
arms A spring back into their original position.
The guides F for the brake fork may be conveniently stamped out of the metal
of the clips, as shewn at Fig. 4, and the sockets A3 for the brake blocks C may be
stamped out of the metal of the brake fork, as shewn at Fig. 3. Fig. 5 shews a
modified arrangement in which the curved parts A2 of the brake fork and the
spring inclines E are arranged below the brake blocks instead of above them as in
Figs. 1 to 4.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. A bicycle brake consisting of a brake fork with limbs having spring action
which carry the brake blocks and which are arranged in combination with inclines
.

page_text: the inclines force the limbs thereof inwards so as to press the brake blocks firmly
against the wheel rim substantially as described.
2. A bicycle brake combined and operating as herein described with reference to
the accompanying drawing.
1000
ABEL & IMRAY,
Agents for the Applicant.