Improvements in or relating t
Year: 1898

page_text: I, ALFRED LONGFELLOW, Flock Manufacturer, Battyeford, Mirfield do hereby
declare the nature of this invention to be as follows:-
-
This invention relates to improvements in connection with pedals for cycles
and its object is to provide an arrangement which will give additional power in
the driving of the cycle.
The arrangement I employ enables greater use to be made of ankle motion,
allowing the pressure to be applied through a greater arc than is at present the
case. I provide the pedal with an extension at the front on which the toes will
rest, and on the pedal pin or on the crank at the part carrying the pedal I fix
a small ratchet wheel. Engaging with this ratchet wheel is a pawl which is pivoted
to one side of the pedal. This pawl allows the pedal to turn in one direction
relatively to the crank so that the cycle can be driven in the ordinary way, but
prevents the pedal turning in the opposite direction.
At the beginning of the stroke the ankle motion causes the toes to be drawn
up slightly and on continuing the stroke the toe will press upon the extension,
the pawl then engaging with the ratchet wheel so that the full leverage of the
extension is obtained. The least efficient part of the stroke is greatly improved
thus enabling the cycle to be driven at a higher speed.
7808
Improvements in or relating t
I, ALFRED LONGFELLOW, Flock Manufacturer, Battyeford, Mirfield do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in connection with pedals for ⚫ycles

page_text: and its object is to provide an arrangement which will give additional power in
the driving of the cycle.
The arrangement I employ enables greater use to be made of ankle motion,
allowing the pressure to be applied through a greater are than is at present the
case.
A ratchet and pawl device is employed which allows the pedal to turn only in
one direction relatively to its spindle. A toe piece is also provided which the
rider in pedalling presses and thus increases the leverage or effective length of
crank during the downward stroke.
At the beginning of the stroke the ankle motion causes the toes to be drawn
up slightly and on continuing the stroke the toe will press upon the extension,
the pawl then engaging with the ratchet wheel so that the full leverage of the
extension is obtained.
In order the the invention may be more clearly understood, reference is had
to the accompanying sheet of illustrative drawings in which Fig. 1 is an end view
partly in section of a ratchet device, Fig. 2 is a sectional view of a pedal and
crank fitted with the arrangement and Figs. 3, 4, 5, and 6 show modifications,
Figs. 5 and 6 also showing the extension or toe piece.
Referring to Figs. 1 and 2 A. is a ring fixed to the crank B and concentric
with the spindle C of the pedal D. The ring or disc A is provided with the
internal ratchet teeth a with which engage the small loose blocks E which serve
as pawls. These are carried in the recesses f of the disc or rim F which is
fixed to the pedal. The pawl wheel or disc F turns relatively to the ratchet
ring A when the pedal is operated. The ratchet allows the pedal to turn quite
freely in one direction the direction taken during the complete stroke of the
crank but if the rider during the downward part of the stroke presses as he
generally does, upon the forward side of the pedal, the pedal will tend to turn
relatively to the crank in the opposite direction. This causes the pawl blocks to
engage with the ratchet teeth and prevents the pedal turning, so that the full
advantage of ankle motion is obtained.
The pawl blocks lie loosely in their recesses and the ones at the top are quite
clear of the ratchet, the lower ones dropping into engagement as shown in Fig. 1.
The arrangement shown in Fig. 3 is similar to that already described but the
blocks are pivoted to the carrier F at one end instead of lying quite loose in
their recesses.
In Fig. 3 the balls E are employed in place of the ratchet blocks, the balls
lying in the recesses f¹ and dropping into engagement with the serrated part a¹
of the ring A which serves as a ratchet wheel.
As shown in Fig. 5 the pawl E³ carried by the pedal D engages with the
ratchet wheel A.
Gis the extension or toe piece at the front of the pedal which increases the
effective length of the crank during part of the stroke by utilising the ankle
motion.
As shown in Fig. 6 the ratchet wheel A' is employed having external ratchet
teeth and with this engages the swinging pawl E4 carried by the pedal.
It is not necessary that the teeth should extend completely round the ratchet
wheel.
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) In pedal attachments for cycles a pawl and ratchet connection between the
pedal and the crank or spindle permitting of relative motion only in one direc-
tion substantially as and for the purposes specified.
(2) In pedal attachments for cycles the combination with a ratchet wheel fixed
to the crank of a pawl device carried by the pedal and adapted to engage with
the ratchet wheel, substantially as described and for the purposes specified.

page_text: (3) In pedal attachments for cycles the combination with a pawl and ratchet
connection between the pedal and the crank of an extension or toe piece at the
front of the pedal increasing the effective length of the crank during part of the
stroke, substantially as and for the purposes specified.
Dated this 25th day of November 1898.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.