Year: 1896

page_text: I, HUGH ROBERT NEWBURGH-STEWART of 21 Great George Street,
Westminster, Captain R.N. do hereby declare the nature of my invention to be
as follows:-
My invention relates to an improved arrangement of brake for velocipedes and
is especially intended for use on machines driven by a chain wheel mounted on the
pedal shaft.
According to my invention I apply the said brake to the rim or periphery of
the aforesaid chain wheel so that the brake acts at or near the central part of the
frame of the machine instead of on the tyres of the wheels as hitherto, thereby
avoiding wear of the tyres, and the jerks on the wheel, caused by the brake when
applied as hitherto.
1 form the brake proper of a piece which is curved to suit the diameter of the
chain wheel against which it is to bear and I mount the said brake on a lever
arranged on the frame of the machine adjacent to the chain wheel, to the other
end of which lever 1 attach a pliable wire, chain or cable or the like which I pass
up through guides on the frame to the head of the machine where it is attached to
a lever handle which is so arranged that by applying hand pressure thereto in the
ordinary way the wire or chain or the like is drawn upwards and taut and the
brake is applied to the rim of the chain wheel. For securing a gradual application
of the brake I insert a spring or springs between the curved piece bearing on the
chain wheel and the lever arm operating the same. In order to prevent undue
wear on the chain or the chain wheel I may form the said chain wheel with flanges
projecting beyond the chain on either side against which the curved piece of the
brake proper is caused to bear.
Dated this with d 1900
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields London, W.C., Agents.
I, HUGH ROBERT NEWBURGH-STEWART, of 21 Great George Street
Westminster, Captain, R.N., 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 :-
My invention relates to an improved arrangement of brake for velocipedes and
is especially intended for use on machines driven by a chain and chain wheel
mounted on the pedal shaft.
According to my invention I apply the said brake to the rim or periphery of

page_text: the aforesaid chain wheel so that the brake acts at or near the central part of the
machine instead of on the tyres of the running wheels, as hitherto, thereby avoiding
wear of the tyres and preventing jerks on the wheel caused by the brake when
applied as hitherto.
Figure 1 of the accompanying drawings is a side elevation of a bicycle provided
with brake mechanism according to my invention from which its application to
other forms of velocipedes driven by chain gear will be readily understood.
Figure 2 is an elevation of the brake lever at right angles to Figure 1.
I form the brake proper A preferably of india rubber which may be in the form
of a brush and curved to suit the diameter of the chain wheel and the curved
portion of the chain against which it is to bear. I mount the brake block A on
one arm 6 of a lever B pivotted on a bracket B' fixed on the frame C of the
machine adjacent to the chain wheel D. To the other arm b' of this lever I attach
one end of a chain, gut, cord or the like E which I pass up through, over or
around, guides E' on the frame to the head of the machine where its other end is
attached to a lever handle F which is so arranged that by applying pressure
thereto in the ordinary way the brake is applied through the said chain, gut, cord
or the like E. For securing a gradual application of the brake I insert a spring G
or springs between the brake block or piece A and the lever arm carrying the
same. In order to prevent undue wear on the chain or the chain wheel I may
form the said chain wheel with flanges projecting beyond the chain on either side
against which the brake block A may be caused to bear.
When a gear case is used as shewn in the drawing an opening is provided
therein through which the brake block can pass to the chain wheel. The brake is
normally held out of action by a spring H carried on a bracket projecting from the
before-mentioned lever arm & the free end of the said spring bearing on the frame
of the machine as shewn but any other suitable arrangement of spring may be
employed for the purpose.
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. In a velocipede driven by means of a chain and chain wheels a brake block
arranged to bear on one of the chain wheels or on the chain as it passes round the
said wheel or on both the wheel and the chain and means for operating the brake
substantially as hereinbefore described.
2. In a velocipede driven by means of a chain and chain wheels, a brake block
arranged to bear on the chain wheel carried on the pedal shaft, a spring interposed
between the brake block and the lever arm on which it is mounted, means for
operating the lever carrying the brake block and a spring for normally keeping
the brake out of action, substantially as herein before described.
3. The combination and arrangement of parts constituting the brake mechanism
for chain driven velocipedes, substantially as herein before described and illustrated
by the accompanying drawings.
Dated this 12th day of February 1897.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C.