Improvements in Pedal Cranks for Velocipedes and other Machines.
Year: 1896

page_text: Date of Application, 5th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in Pedal Cranks for Velocipedes and other Machines.
I THOMAS JOIN YEOMANS GOULD of 1 Starley Road Coventry in the County
of Warwick Mechanic do hereby declare the nature of this invention to be as
follows:-
This invention relates to the method of securing the pedal pins to the cranks of
Velocipedes and other machines and the object thereof is to prevent the said pins
from becoming loose when in use.
Now according to this invention I form two collars on the pin of the same
diameter as the crank eye and I leave sufficient space between the collars to admit
the crank eye between them. I slot a piece out of the crank eye to admit the
pin and when the pin is inserted in the crank I close the space left at the end
of the crank eye by means of a block which is held in place by means of a screw
or bolt. To prevent the pin from rotating I form a flat on the pin which flat bears
on the inside of the said block. Lugs are formed on the crank eye to receive
the said bolt and I prefer to make the block slightly smaller than the space
between the said lugs so that when the bolt or screw is tightened the ends of the
crank eye will be drawn together and clasp the pin firmly. Instead of slotting
the crank eye the said eye may be forged or cast of the required shape and after-
wards milled or otherwise prepared to receive the pin and block. Instead of
forming a slot on the pin next the block the crank eye may be made rectangular
and the portion of the pin between the collars shaped to fit the space in the crank
eye. The crank eye may be recessed to receive the outer collar on the pin so
that when put together the said collar is flush with the crank cheek.
Dated this Fifth day of November 1896.
T. E. HALFORD,
11 Furnival Street, London, E.C., Agent for Applicant.
COMPLETE SP.
Improvements in Pedal Cranks for Velocipedes and other Machines.
I, THOMAS JOHN YEOMANS GOULD, of 1 Starley Road, Coventry, in the County
of Warwick, Mechanic, 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:-
This invention relates to a method of attaching a cycle pedal pin to a crank and
has for its object to enable the parts to be readily united or detached as desired.
In the accompanying drawings

page_text: Figure 1 is an elevation partly in section of the improved crank and pedal pin
attachment.
Figure 2 is a similar view at right angles to the plane of Figure 1.
Figure 3 is a perspective view showing the several parts detached.
Like letters indicate like parts throughout the drawings.
The pedal pin A has a head B. formed upon one end, and separated from the
head by a short neck C and forming a groove D is a shoulder E. Upon the neck C
which is preferably cylindrical, is cut a flat C. The crank F is constructed with
the usual boss F at one end for attachment to the crank axle, the other end
being drilled and slotted so as to form a jaw F2 which is provided with lugs G G.
The drilled portion forming the innermost part of the slot is of the same diameter
as the cylindrical portion of the neck C, the outer part being narrower but of
such a width that the neck C may be slipped into the slot, owing to the flat C
reducing its diameter. The head 33 is sunk in the face of the crank F, so as
to make its surface flush with that of the crank. In order to retain the neck C in
the slot in the end of the crank when the jaw F is in engagement with the
groove D and to prevent the pedal pin from turning, a block H bored as at H
and provided with a flat surface H2 is placed between the lugs G G¹, the flat
surface H2 resting on the flat C while the opening H' allows of the passage of
the screw bolt J, by means of which the jaw is clamped. The bolt ja is screw
threaded and provided with a shoulder and square head J2, the lug G being
bored so as to allow of the free passage of the bolt while the lug G¹ is thickened
and screw threaded. The thickening of the lug G₁ affords a good hold for the
screw of the bolt and enables the shoulders 13 to be formed by means of which
the hold of the jaw F2 upon the neck C is somewhat increased.
It is obvious that the construction of the several parts as described above and
illustrated in the accompanying drawings may be modified in various ways, without
departing from the spirit of the invention. Thus in place of forming the neck C
cylindrical with the flat cut upon it, it may be made square or polygonal, the
slot in the end of the crank being shaped accordingly. In this case it may not
be found necessary to employ the block H, as the shape of the parts will effectually
prevent the pedal pin from turning.
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. Attaching a cycle pedal pin to a crank in the manner described.
2. Attaching a cycle pedal pin to a crank by the engagement of an open jaw
such as upon the end of the latter, with a groove such as D in the end of the
pedal pin, substantially as described.
3. The combination with a cycle pedal pin having a head B and collar E formed
at one end, of an open jaw such as F upon the end of the crank, together with or
without a block such as H, substantially as and for the purpose described.
4. In a crank and pedal pin attachment, an open crank jaw such as F2 in which
one side G¹ overhangs a recess in which the pedal pin lies, substantially as and
for the purpose described and illustrated in the accompanying drawings.
5. The combination and arrangement of parts constituting the complete cycle
pedal pin and crank attachment substantially as described and illustrated in
Figures 1, 2 and 3 of the accompanying drawings.
Dated this 26th day of July 1897
THOMAS JOHN YEOMANS GOULD.
Boult & Wade,
Agents for the Applicant.