An Improved Combined Back Pedal and Brake Apparatus for Bicycles.
Year: 1899

page_text: Date of Application, 18th Feb., 1899
Complete Specification Left, 18th Nov., 1899--Accepted, 30th Dec., 1899
PROVISIONAL SPECIFICATION.
An Improved Combined Back Pedal and Brake Apparatus for
Bicycles.
I, EDMUND JAMES WINGFIELD, of 10, Wakefield Street, Gravesend, in the
County of Kent, Bicycle and Mechanical Engineer, do hereby declare the nature
of this invention to be as follows:-
My invention relates to an improved combined back pedal and brake apparatus.
In carrying my invention into practice I screw on the back hub a screwed
collar with a flange, on the outer periphery of the collar I cut four reducing
recesses at equal distances apart in order that four clutches hereinafter described
may engage with the said recesses. The inside of this flange slides against a
leather washer fitted into a recess or drum; on this said drum is a socket with
four slots cut and through which the clutches project. In the inside of the
socket of the drum I cut four elongated curved openings in which I place loose
springs and suitable shaped clutches being for preference rounded at one end and
cut to an angle at the other end. The object of the springs is to force outwards
the clutches. Between each opening on the face of the socket 1 fix a projecting
pin (four pins) these said pins engage with four holes pierced in the face of the
ring that carries the rollers. On the outside of the socket of the drum is the
sprocket or chain wheel. On the other or opposite face of the ring I cut four
sloping recesses with stops and in these recesses I place four loose rollers. The
ring is covered by a dust cap which fits over the same by being screwed on the
spindle and is adjustable to the wear of the brake washer
The apparatus is worked by holding the feet still on the pedals, when the
four clutches free the chain wheel, so that the machine runs free. To apply the
brake I pedal backwards slightly which throws the four rollers into gear and
compresses against the movable drum holding the leather washer and forces the
said washer on to the flange on the hub and so brings the machine to a standstill.
Dated this 18th day of February 1899.
An Improved Combined Back Pedal and Brake Apparatus for
Bicycles. _
Ì, EDMUND JAMES WINGFIELD, of 10, Wakefield Street, Gravesend, in the
County of Kent, Cycle Maker, do hereby declare the nature of this invention, an
Price 8d.]

page_text: 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 combined back pedal and brake apparatus
for bicycles.
And in order that my invention may be thoroughly understood, I now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is a side elevation of Fig. 2, with a section on line AB.
Fig. 2, is a plan of the screwed collar and flange.
Fig. 3, is a side elevation of the apparatus.
Fig. 4, is a front elevation of the apparatus.
Fig. 5, is a side view of the clutch.
Fig. 6, is a half plan of the interior part of the chain wheel, showing the
openings in which the clutches operate. One of the clutches and springs is illus-
trated in this figure.
Fig. 7 is a section of Fig. 6, with the addition of the ring with four rising
surfaces.
Fig. 8, is a plan of the ring.
which fit over the screw heads i for the
Fig. 9, is a plan of the inside of the dust cap.
Fig. 10, is a plan of a thin washer
purpose of keeping the clutches
and springs k from displacement.
Fig. 11, is a side view of Fig. 10.
In carrying my invention into practice I screw on the back hub a screwed
collar d with a flange f, on the outer periphery of the collar dI cut four reduc-
ing recesses at equal distances apart in order that four clutches hereinafter
described may engage with the said recesses (. The inside of this flange f slides
against a leather washer m fitted into a recess or drum e; on this said drum is
fitted the chain wheel b with four slots n cut and through which the clutches y
are placed to project. In the inside of the chain wheel I cut four elongated
curved openings n in which I place loose springs o and suitable shaped clutches g
being for preference rounded at one end and cut to an angle at the other end.
The object of the springs o is to force outwards the clutches g. Between each
opening on the face of the chain wheel I fix four projecting pins and p¹ both
back and front these said pins engage with four holes pierced in the drum c and
the back face of the ring e that carries the four rising surfaces q. On the out-
side of the drum c is fitted the sprocket or chain wheel b by means of the pins p
fitting into the holes ». On the other or opposite face of the ring e I cut four
sloping recesses q with stops o¹ these recesses and stops engage with correspond-
ing sloping recesses and stops fitted inside the dust cap. The ring is covered
by a dust cap which fits over the same by being screwed on the spindle and is
adjustable to the wear of the brake washer with a centre ring v fixed to the dust
cap a by means of three screws . In the centre ring I cut three slots win
order to receive three springs and clutches j; the said clutches j engage with
stops a cut in the ring 6.
The apparatus is worked by holding the feet still on the pedals, when the four
clutches free the chain wheel, so that the machine runs free. To apply the brake
I pedal backwards slightly which throws the four stops into gear and compress
against the movable drum holding the leather washer and forces the said washer
on to the flange or the hub and so brings the machine to a stand still.
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. The combined back pedal and brake apparatus for bicycles, the arrangement
of and the various parts substantially as fully described in the above specification
and illustrated in the accompanying drawing.
2. In a combined back pedal and brake apparatus the combination and

page_text: arrangement of the chain wheel 6 drum c flange f screwed collar reducing
recesses washer m holes r pins p and p', slots n clutches y and springs o, sub-
stantially as herein described and according to the accompanying drawing,
3. In a combined back pedal and brake apparatus the combination and arrange-
ment of the ring e with the four rising surfaces 7 and the stops of ring four
rising surfaces y stops u stops a centre ring v slots w springs clutches and
dust cap a, substantially as herein described and according to the accompanying
drawing.
Dated this 18th day of November 1899
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.