Improved Rim Brake Apparatus for Affixing to Cycle Frames for Action from Pedal.
Year: 1899

page_text: Date of Application, 26th Jan., 1899
Complete Specification Left, 25th Oct., 1899-Accepted, 25th Nov., 1835-
A.
PROVISIONAL SPECIFICATION.
Improved Rim Brake Apparatus for Affixing to Cycle Frames for
Action from Pedal.
I, NOAH MITCHELL, of 194, Regent Street, London, Engineer, do hereby declare
the nature of this invention to be as follows:-
.
This invention relates to improved rim brake apparatus for affixing to cycle
frames for action from pedal.
1
To carry this invention into practice, I provide a kind of brace or bridge in
which by slots and screws, crutches are adjustable to fit to or between the trame
near the pedals bracket.
The brace or bridge has lugs with holes for a cross shaft. of a lever which can
be kept in one position by a spring bearing against the bracket or other part and
be releasable by pressure, such as by the foot pedal during slight reverse motion.
The lever is in connection with a rim twin brake of a loop or straddle like
frame suspended from the centre stay or from the back forks and only to be
applied to the rim of, say, the rear free wheel of a bicycle.
The spring keeps the brake off and a back pedalling puts it on, a spring return
lip of the first named lever being also provided which the pedal or its crank
presses clear while pedalling onwards but becomes blocked on the reverse.
Dated this 26th day of January 1899.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Noah Mitchell.
Improved Rim Brake Apparatus for Affixing to Cycle Frames for
Action from Pedal.
I, NOAH MITCHELL, of 194, Regent Street, London, Engineer, 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 improved rim brake apparatus for affixing to cycle
frames for action from pedal.
To carry this invention into practice, I provide a kind of brace and bridge,
which by screws, crutches, or rods, are adjustable to fit to or between the frame
near the pedals bracket.
The bridge has lugs with holes for a cross shaft or bar of a lever which can be
kept in one position by a spring and be releasable. by pressure, such as by the
foot pedal during slight reverse motion.

page_text: frame suspended from the back forks and only to be applied to the rim of, say,
the free wheel of a bicycle.
The spring keeps the brake off, and a back pedalling puts it on a spring return
lip of the first named lever being also provided which the pedal on its crank
presses clear while pedalling onwards but becomes blocked on the reverse.
My invention is shown on the accompanying sheet of drawings.
Figure 1, side elevation.
Figure 2, back end view.
Figure 3, front end view.
Figure 4, plan.
Figure 5, detached perspective elevation of side slip or catch lug.
A, brace or saddle to rest on socket ends of rear fork B of, say, a bicycle.
C, bridge to go under the socket end of rear fork and secured thereto and to the
brace A by screw D, to fix them. E, E, lugs depending from bridge C for carry-
ing the cross bar F which is somewhat free to oscillate between them.
G, spring having its ends in the cross bar F and in one of them the depending
lugs E respectively. H, crank arm on extension pivot I of cross bar F and
carrying a slip lever J pivotal therein by enclosed coiled spring K, said slip
Jever J being set at right angles with its nose L projecting therefrom to be struck
and lifted by the pedal crank M at each rotation, clicking noise being prevented
by the impulse spring N secured to the underside of said slip lever J. P, rod
depending from the cross bar F for adjustably connecting by screw pin Q the two
arms R, R, by their swivel cross head S.
T, T, leather faced brake blocks attached at their lower ends to the arms R, R,
said brake blocks being hung from clips U, U, bolted to each rear fork arm B
for simultaneous pressure against the inner peripheral side face of the wheel V
when by a reverse or back motion of the pedal presses on the slip lever J, such
pressure then overcoming the tension of the spring K, and putting the brakes T, T,
into contact with the rim of the wheel V to a degree determined by the rider's
foot such as when going down hill and the rear wheel running free, the descent
being then completely under the rider's control.
On the rider re-starting for forward motion, the pressure of the pedal, is removed
from the slip lever J and the action of the springs K forces the brakes clear of
the wheel's rim.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. Rim brake appliances T, T, suspended by clips U, U, from rear fork arms B, B,
of a cycle and connected by arms R, R, to swivel cross head of screw pin Q carried
by extension rod P of pivotted cross bar F suspended from bridge C secured by
screw D and brace A to socketted end of rear fork substantially as specified.
2. Rim brake appliances for cycles consisting of brake blocks T, T, suspended
from rear fork arms B, B, for braking contact with inner side periphery of rear
wheel connecting arms R, R, adjustable swivel cross head S on screw pin Q
pivotted to depending rod P of pivotted cross bar F of bridge C, one pivot thereof
carrying crank H with spring K, controlled lever J, substantially as specified.
The 25th day of October 1899
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Noah Mitchell.