Improvements in the Attachment of Pedals to Cranks of Cycles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Attachment of Pedals to Cranks of Cycles.
I, JOHN MONEY, 30, Shakespeare Road, Brixton, London, S.E., Engineer, do
hereby declare the nature of this invention to be as follows:-
--
The object of this invention is to form a solid joint between the crank and pedal
pin of cycles without bolts and nuts projecting laterally, and which will allow the
pedal and crank to be easily taken to pieces and re-adjusted.
In this invention the outer end of the crank, is turned into a tapered circular
tenon screwed at the end and having a square shoulder at the junction of the
tenon with the crank. This tenon is inserted into a circular mortise hole formed
in the end of the pedal pin, which is faced to fit the square shoulder on the crank.
The mortise and tenon joint is secured by a screwed nut with or without a washer
bearing against the outer end of the mortise in the pedal pin. When the mortise
and tenon joint is made, the inner face of the mortise end of the pedal pin together
with the face of the end of the crank attached thereto, are turned or planed true
square to the pedal pin; and from this shoulder outward a sufficient length of
the pedal pin is screwed to form the seat of the back cone of the pedal ball-races.
When this cone is screwed home against the face of the pedal pin and crank it
forms.a shoulder which prevents the pedal pin from turning round on the crank
tenon.
The 20th 1
of Tul 1907
I, JOHN MONEY, 30 Shakespeare Road, Herne Hill, in the County of 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:.
-
It has been common practice to attach pedals to the pedal cranks of velocipedes
by reducing the projecting end of the pedal pin, passing the reduced end through
a hole drilled transversely in the end of the crank, screw threading the part of
the pin which projects beyond the inner face of the crank and providing a nut
thereon to hold the pedal pin in place. Such a mode of fixing the pin to the
cranks has been objectionable because the projection of the nuts on the inner
sides of the cranks necessitates the latter being placed at a greater distance apart
in order that the said nuts may pass the framework of the machine.

page_text: In order to overcome this difficulty, pedals have latterly been applied by merely
screwing the ends of the pins very tightly into screw threaded holes in the crank
ends, but such fixing soon comes loose, and if after being screwed into the crank
the end of the pedal pin is rivetted over, then the pedal pin cannot well be removed
from the crank. This defect is well known because in some of the latest patterns
of cranks the ends of the latter are slotted, the slots extending to the screw
threaded holes to receive the pins of the pedals, and after the insertion of the
latter the divided ends of the cranks are drawn together by screws passing trans-
versely through such divided ends.
Now the object of this present invention is to provide means to fix the pedal
pins to the cranks in such manner that the same shall be readily detachable from
the cranks, and without any liability of becoming accidentally loose thereon.
In the accompanying drawing Fig. 1 shews in front elevation a pedal connection
according to my invention. Fig. 2 a sectional front elevation, Fig. 3 a back
elevation, Fig. 4 a partial plan and Figs. 5 perspective views of the attachment
parts. Figs. 6 are perspective views shewing a modified formation of the same
parts.
Referring to Figs. 1 to 5, I form the end of the crank A with a shoulder A¹
see Fig. & and a tenon or pin A2 projecting in the direction of the axis of the
crank; this pin A² I generally make to taper towards its end, and I form the end
with a screw thread.
The pedal B may be of any ordinary or preferred construction, but I make the
end of the pedal pin B, which is shewn separately by a perspective view at Figs. 5,
of a sufficient size to be formed with a hole B extending transversely through
same, with an under surface Be Fig. 5 on the projecting head of the pin B, adapted
to fit onto and against the shoulder A' of the crank while the tapered pin A³
thereof takes through the said correspondingly tapered hole of the pedal pin.
When the parts have been thus placed together as shewn at Figs. 1 to 4, not only
docs the under flat surface 12 of the pedal pin fit closely upon the shoulder A
of the crank, but a lateral flat bearing surface 133 formed on the end of the pedal
pin takes against a like surface A³ (Fig. 5) on the crank.
In some cases, as shewn at Figs. 6, the upper surface of the shoulder may be
made inclined or V-shaped as for example is shewn at A" and the under surface 13²
of the pedal pin is formed to take over such surface.
To complete the fixture of the pedal pin I apply a nut C to the projecting
screwed end of the conical pin A2, the office of which is to force the end of the
pedal pin to its required position on the pin A2 and to prevent the pedal pin
coming off.
By my invention a solid and firm joint is formed between the crank and the
pedal pin, without any lateral projection on the inside surface of the crank, and
without causing the entire pressure applied to the pedal to act against a nut,
while as before stated the pedal can be readily detached from the crank when
required, although it will not become accidentally loose therefrom.
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 attaching pedals to the cranks of velocipedes, a pin projecting from the
end of the crank, extending in the direction of the length thereof, and a shoulder
on the crank at the base of the pin, in combination with a pedal pin having a
hole transversely through the projecting end thereof to pass over the pin of the
crank a bearing face on the pedal pin to take against a lateral bearing face or
surface on the face of the crank, and means such as a nut screwing onto the end
of the pin on the crank to hold the pedal pin thereon, substantially as described.
2. In attaching pedals to the cranks of velocipedes, forming or providing a
conical or tapered projecting pin on the end of the crank in the direction of the

page_text: length thereof, there being a flat, angular or V-shaped shoulder at the base or
root of the pin, and a lateral bearing surface on the face of the crank, in combi-
nation with a hole extending transversely through the projecting end of the pedal
pin through which hole the pin of the crank passes, a flat, angular or V-shaped
bearing surface on the pedal pin to take against the shoulder of the crank, and a
vertical bearing surface on the pedal pin to take against the lateral bearing
surface on the face of the crank, together with a nut screwing onto the threaded
projecting end of the pin of the crank to hold the pedal pin in position, sub-
stantially as described.
3. The particular construction and arrangement of parts composing my improved
means for attaching pedals to cranks of cycles, all combined and acting sub-
stantially as and for the purposes described with reference to the accompanying
drawings.
Dated this end day on April 100.
BREWER & SON,
London & Leeds, Agents for the Applicant