Improvements in Cycle Brakes and Brake Fittings.
Year: 1897

page_text: Date of Application, 29th Mar., 1897
Complete Specification Left, 29th Dec., 1897-Accepted, 5th Mar., 1898
PROVIDIONAL DIECIFICATION.
Improvements in Cycle Brakes and Brake Fittings.
I, JOSEPH CARROLL, of 115, Bath Street, Ilkeston, in the County of Derby,
Batchelor of Medicine, do hereby declare the nature of this invention to be as
follows:-
On the sides of the rim are fitted or made suitable rubbing parts or the rim
is provided with rubbing surfaces on which the brake surfaces are to act, these
rubbing surfaces being made flat or with V shaped annular grooves or otherwise
and the brake surfaces flat or with similar projections of ✓ shaped section or
otherwise to fit thereto, said rubbing and brake surfaces being suitably shaped
to provide a sufficient frictional surface of contact. The brake surfaces are at
the ends of two curved bars or plates, the general curvature of each of which is
an arc of a circle and the two branches of the fork carrying the axle of the wheel
on the rim of which these brakes are to act, are so curved or provided with curved
seats to receive the aforesaid curved bars, that the latter are supported thereby
along a circle transversely cutting the wheel, the brake ends of the two bars being
presented to the sides of the rim one on each side, and the other ends of said bars
approached to a suitable distance from one another. By pressing the latter ends
apart the curved bars are moved in opposite directions and slide in their seats
or guides so that the brake surface ends approach each other and so are pressed
laterally against the wheel rim travelling between them. To cause this action
a wedge is moved by a rod, which rod may be concealed within the steering post
and handle. To move the rod a transversely sliding rod or bolt in the handle
bar having a projection or bend to ride on the end of the former rod and so move
the latter longitudinally, is provided with suitable means for moving it backwards
and forwards for instance with a stud passing through a slot in the handle bar.
By moving this stud in one direction the bolt moves the rod so as to press the
wedge between the ends of the plates thus separating said ends more widely from
each other and causing the brake surface ends to approach and act upon the wheel.
A movement of the stud in the other direction displaces the bolt, releases the
rod, which may be returned by a spring and returns the wedge.
The wedge may be connected to the plate ends for instance by dovetail mortises
and tenons so that the plate ends follow on the movement of the wedge and are
drawn together when the wedge is drawn back.
The plates may also be engaged in their guides or seats by similar dovetail
mortises and tenons so as to secure their retention in said guides or seats.
Such brake by suitable alteration of its fittings could be applied to the rear
wheel of a bicycle or similarly situated wheel instead of to the front wheel, it
may also be applied to any wheel such as one of the chain wheels or cogged wheels.
Price R71

page_text: The brake surfaces may be made of or covered with metal, india rubber, leather
or any other suitable material.
1
1 1007
HERBERT HADDAN & Co.,
Agents to Applicant.
18, Buckingham Street, Strand, London.
Improvements in Cycle Brakes and Brake Fittings.
I, JOSEPH CARROLL, of 115, Bath Street, Ilkeston, in the County of Derby,
Batchelor of Medicine, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
i
This invention relates to cycle brakes and brake fittings and is illustrated in the
annexed drawing, in which Fig. 1 is a front elevation partly in section of the
upper part of the forks, steering head and part of the handle bar of a cycle fitted
with the improved brake and fittings. Fig. 2 is a section on line 2-2, and Fig. 3
a section on line 3-3 of Fig. 1. Figs. 4, 5, 6, and 7 are detail views of a modi-
fication in the means for actuating the parts composing the brake.
On the sides of the rim B are fitted or made suitable rubbing parts A or the
rim is provided with rubbing surfaces B¹ on which the brake surfaces C are to act,
these rubbing surfaces being made flat or with V-shaped annular grooves as at a
or otherwise and the brake surfaces flat or with similar projections of V-shaped
section or otherwise to fit thereto, said rubbing and brake surfaces being suitably
shaped to provide a sufficient frictional surface of contact. The brake surfaces
are at the ends of two curved bars or plates D, D the general curvature of each
of which is an arc of a circle and the two branches of the fork E carrying the axle
of the wheel on the rim of which these brakes are to act, are so curved or provided
with curved seats F, F to receive the aforesaid curved bars D, D that the latter
are supported thereby along a circle transversely cutting the wheel, the brake ends
of the two bars D, D, being presented to the sides of the rim one on each side, and
the other ends of said bars approached to a suitable distance from one another. By
pressing the latter ends apart the curved bars are moved in opposite directions
and slide in their seats or guides so that the brake surface ends approach each other
and so are pressed laterally against the wheel rim travelling between them.
Various means may be employed to cause this movement of the bars D, D, and I
do not necessarily confine myself to the mechanism here shown. Thus wedge G is
moved by a rod H, which rod may be concealed within the steering post J and
handle K. To move the rod H a transversely sliding rod or bolt L in the handle
bar K having a projection or bend to ride on the end of the former rod H and so
move the latter longitudinally, is provided with suitable means for moving it
backwards and forwards for instance with a stud passing through a slot k¹ in the
handle bar. By moving this stud in one direction the bolt L moves the rod H
so as to press the wedge G between the ends of the plates D, D, thus separating
said ends more widely from each other and causing the brake surface ends C, C,
to approach and act upon the wheel. A movement of the stud in the other
direction displaces the bolt L releases the rod H, which may be returned by a
spring M and returns the wedge G.
The wedge G may be connected to the plate ends for instance by dovetail mortises
and tenons as at g, gl, Fig. 3 so that the plate ends follow on the movement of
the wedge and are drawn together when the wedge is drawn back.
4

page_text: The plates may also be engaged in their guides or seats, by similar dovetail
mortises and tenons as at F1, Fig. 2 so as to secure their retention in said guides
or seats.
The rod H may be made adjustable in any of the various ways known to
makers of brake fittings with concealed rod.
Instead of the wedge G and its attendant and operating parts I may form
the ends of the plates D, D, as two rack bars N, N, gearing respectively from
opposite sides with the pinion O on a rotary shaft P journalled in the steering
post as at Q Fig. 6. The shaft P consists partly of a prismatic rod P engaging
in a prismatic tube P2 forming the other part. The shaft is thus extensible to
adapt it to correspond with a higher or lower position of the handle bar K a nut R
secures the tubular part Pa to move up and down with the handle bar but does
not prevent its rotary movement. From the shaft P there projects through a
slot S in the handle bar K the lever T to which is connected a draw rod U with
a hook V this draw rod being guided on a stud Won the handle bar.
By moving the draw rod U in the one or other direction the shaft P is partially
revolved and causes the pinion O to either draw together or separate the ends of
the plates D, D, thus separating the brake surfaces from or applying them to the
wheel rim respectively.
This brake by suitable alteration of its fittings could be applied to the rear
wheel of a bicycle or similarly situated wheel instead of to the front wheel; it
may also be applied to any wheel, such as one of the cogged wheels. The brake
surfaces may be made of or covered with metal, india-rubber, leather or any other
suitable material.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. A cycle brake in which a guide in the form of an arc of a circle carries two
curved sliding plates or bars means being provided for pressing said bars apart at
or approaching them to each other at one end so as to cause them to slide in their
guides to bring their other ends or brake blocks thereon into or out of contact.
with opposite side faces of a wheel rim or other moving part between them.
2. A cycle brake in which part of the wheel fork is made in the form of an arc
of a circle to act as a guide for two curved sliding plates or bars adapted to be
slid so that one end of each may have contact with a side face of the wheel rim
or a rubbing surface thereon; these plates or bars having suitable means for operat-
ing their sliding movements.
3. The construction of a brake of two sliding plates or bars with their guides
substantially as herein set forth and adapted to be operated substantially in the
manner specified by suitable gear.
4. The combination with the brake comprising the two sliding plates or bars
of guides for said plates or bars, a wedge engaging their ends and means for
moving the same substantially as set forth.
nated thin 90th day of time...
Dated the 20th day of
HERBERT HADDAN & Co.,
Agents to Applicant.
18, Buckingham Street, Strand, W.C., London.
HERBERT HADDAN & Co.,
Agents to Applicant.
18, Buckingham Street, Strand, W.C., London.