Improvements in or relating to Velocipede Cranks and Crank Pins."
Year: 1896

page_text: Date of Application, 22nd Dec., 1896
Complete Specification Left 22nd Oct 1897-Accepted 22nd Dec 1807
Date of Application, 22nd Dec., 1896
Complete Specification Left 22nd Oct. 1897-Accepted, 22nd Dec, 1807
PROVISIONAL SPECIFICATION.
"Improvements in or relating to Velocipede Cranks and Crank Pins."
We, FREDERICK EASOм, of 53, City Road, Cycle Works Manager, and EDWIN
BOWLES of 132, Queens Road, Engineer both of Beeston in the County of Nottingham
and HENRY BELCHER, General Manager of Humber & Company Limited, of Beeston,
aforesaid, do hereby declare the nature of this invention to be as follows:-
This invention relates to improved means for connecting or securing crank pins to
velocipede cranks and also means for conveniently adjusting the distance between the
centre of the said crank pin and the centre of the crank axle.
In carrying out this invention the end of the crank pin which fits into the crank
is preferably formed triangular rectangular or in the form of a regular or irregular
polygon or section, and a correspondingly shaped hole is formed in the crank to
receive it. That portion of the crank extending from the opening to the end is
divided, and is provided with a transverse screw by means of which the opening may
be closed and the end of the crank pin secured.
In order to secure the crank pin more firmly the end of the said pin and the
opening in the crank may be formed with serrations, or a screw and washer may be
employed, the former being screwed into the end of the crank pin in which a hole is
formed to receive it.
If preferred the crank pin may be secured by splitting the end of the said pin
and opening it out after it is placed in the opening in the crank, by means of a taper
screw or a screw with a conical head screwed into the end of the crank pin.
In order to provide a means of adjustment, that part of the crank pin which fits
into the crank is formed eccentric or cranked in respect to that part on which the
pedal is mounted, so that by removing the end of the pin from the crank and
replacing it in
different position that part of the crank pin on which the pedal is
mounted may be brought nearer to or be removed further from the crank axle.
If preferred a cranked crank-pin with a round end to fit in the crank may be
employed so that the crank pin may be turned without removing it. The end in this
case may be plain or screwed and be fixed in the crank by closing the opening in the
latter or the round part may be formed or be provided with a feather key and one or
more keyways be formed in the crank.
In this case the crank pin may be turned by removing the key only, or both the
key and the crank pin may be secured together.
Dated this 22nd day of December 1896.
BOULT & WADE
Agents for the Applicants.

page_text: COME LEID DI POTICATIOND
"Improvements in or relating to Velocipede Cranks and Crank Pins."
We, FREDERICK EASOм of 53 City Road, Cycle Works manager, and EDWIN BOWLES
of 132 Queens Road, Enginer, both of Beeston in the County of Nottingham, and
HENRY BELCHER, General Manager of Humber & Company Limited, Beeston afore-
said, 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 means for connecting or securing crank or pedal
pins to velocipede cranks, and also means for conveniently adjusting the distance
between the centre of the said pedal pin and the centre of the crank axle.
In carrying out this invention the end of the crank pin which fits into the crank,
is preferably formed triangular, rectangular or in the form of a regular or irregular,
polygon in section, and a corresponding shaped hole is formed in the crank to receive
it. That portion of the crank extending from the opening to the end is divided and
is provided with a transverse screw by means of which the opening may be closed
and the end of the pedal pin secured.
In order to secure the pedal pin more firmly, the end of the said pin and the
opening in the crank may be formed with serrations or a screw and washer may, be
employed the former being screwed into the end of the pedal pin in which a hole is
formed to receive it.
.
If preferred the pedal pin may be secured by splitting the end of the said pin and
opening it out after it is placed in the opening in the crank, by means of a taper
screw, or a screw with a conical head, screwed into the end of the pedal pin.
In order to provide a means of adjustment that part of the pedal pin which fits into
the crank, is formed eccentric or cranked in respect to that part on which the pedal
is mounted, so that by removing the end of the pin from the crank and replacing it
in a different position, that part of the pedal pin on which the pedal is mounted may
be brought nearer to or be removed further from the crank axle.
If preferred a cranked pedal pin with a round end to fit in the crank may be
employed so that the pedal pin may be turned without removing it. The end in this
case may be plain or screwed and be fixed in the crank by closing the opening in
the latter or the round part may be formed or be provided with a feather key and one
or more key ways be formed in the crank.
In this case the pedal pin may be turned by removing the key only or both the
key and the pedal pin may be secured together.
In the accompanying drawings
Figure 1 is a side elevation of a portion of an improved crank.
Figure 2 is a front elevation of a portion of the same.
Figure 3 is a side elevation of a portion of the pedal pin.
Fig. 4 is an end elevation of the same viewed from the back.
Fig. 5 is a back elevation of part of another form of crank with the pedal pin
in position.
Fig. 6 is a side elevation of the same a portion of the crank being in section on
the line 6-6 of Fig. 5.
Fig. 7 is a side elevation of portions of another form of crank and pedal pin.
Fig. 8 is a back elevation of the same.
Fig. 9 is a back elevation of portions of another form of crank and pedal pin.
Fig. 10 is a side elevation of the same partly in section on the line 10-10 o
Fig. 9.
Figs. 11 and 12 are elevations of a portion of another form of crank.
Fig. 13 is a side elevation of part of the pedal pin for the same, and

page_text: Fig. 14 shows the pedal pin in position, the crank and lock nut being in section.
Like letters indicate like parts throughout the drawings.
With reference first to Figs. 1, 2, 3 and 4.-.
A is the portion of the crank, having a hexagonal opening A¹ formed to receive the
end C¹ of the pedal pin C. The end of the crank is provided with a slot A2 leading
into the hexagonal opening, thus forming a "squeeze clip "; lugs are formed on each
side of the slot, having a transverse screw A³ fitted to them in the usual manner,
for tightening the clip and gripping the end of the pedal pin. The portion of the
perlal pin C which carries the pedal, is formed eccentrically with the part C which
fits into the crank. So that by loosening the screw A³, withdrawing the pedal pin,
turning it round and inserting it again, the effective length or "throw" of the crank
may be adjusted.
Figs. 5 and 6 show a form of crank, and pedal pin in which the end of the crank
is not slotted, in, this form the hexagon part C of the pedal pin is made solid and
tapped to receive a screw D. The screw D is provided with a washer D' which extends
over the opening in the crank, at the back, and thus secures the pedal pin to
the crank.
Although Figs. 1, 2, 3, 4, 5, and 6 only illustrate a construction in which the shape
of the end of the pedal pin is hexagonal, it must be understood that we may make
it of any desired shape, although it is formed preferably triangular, rectangular, or
polygonal in section.
In Figs. 7 and 8 the crank is again not slotted and the opening to receive the pedal
pin is in the form of a circular hole tapped to correspond with the screwed end C¹ of
the pedal pin. A central hole is drilled in the screwed end C', which is also slotted
at C across a diameter. After the pedal is screwed home a small taper screw E is
screwed into the central hole, thus opening the slot Cand locking the pedal pin in
the crank.
Figs. 9 and 10 also illustrate another form of crank and pedal pin according to our
invention. In this case the crank is solid, having a circular opening tapped to receive
the screwed end C of the pedal pin..
A groove is formed in the face of the crank in which slides a key or detent F. This
detent engages in a slot C made in the end of the pedal pin and is provided with a
slot F through which a screw F passes, serving when tightened to keep the feather
in its place. In this case to adjust the throw of the pedal, the screw F is slackened,
and the detent F withdrawn from the slot C-the pedal pin is then turned to the
throw required, the detent allowed to engage in the nearest slot, and the screw
tightened up.
Figures 11, 12, 13, and 14 illustrate a modification of our invention in which the
eccentric portion C of the pedal pin-which is circular in section and screwed to fit
a tapped hole in the solid crank-is reduced in diameter at its extreme end, and
screwed with a left-handed thread. After screwing the pedal pin into the crank a
locking ring C with left-hand thread which fits into a recess A provided for it in the
crank, is screwed on to the reduced portion C, thus securing the pedal pin in the
crank.
Any of the adjustable cranks herein described may, if desired be fitted with a
"throw indicator", which may consist of a scale or series of marks engraved on, say
the crank, and an arrow or other suitable mark- upon the adjacent part of the pedal
pin, thus indicating the amount of throw to which the crank pin can be set.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination with a crank having a squeeze clip, the opening of which is of
triangular, rectangular or other polygonal shape of a pedal pin having an eccentric
end portion such as C of corresponding shape, substantially as described and
illustrated in Figures 1, 2, 3 and 4 of the accompanying drawings.
2. The combination with a crank, having an undivided end and an opening of

page_text: triangular, rectangular or other polygonal shape, of a pedal pin having an eccentric
end portion such as C¹ of corresponding shape secured to the crank by a screw D and
washer D¹ substantially as described and illustrated in Figures 5 and 6 of the
accompanying drawings.
3. Locking an adjustable pedal pin in a crank by means of a screwed and split
eccentric end, and tapered screwed pin, such as E substantially as described and
illustrated in Figures 7 and 8 of the accompanying drawings.
4. Locking an adjustable pedal pin by means of a removable detent such as F
substantially as described and illustrated in Figures 9 and 10 of the accompanying
drawings.
5. The combination with a crank, of a pedal pin having an eccentric end screwed
with right and left handed threads, and provided with a locking ring sunk into the
back of the crank substantially as described and illustrated in Figures 11, 12, 13 and 14
of the accompanying drawings.
6. The complete pedal pin adjustment, substantially as described and illustrated in
Figures 1, 2, 3 and 4; or 5 and 6; or 7 and 8; or 9 and 10; or 11, 12 13 and 14 of
the accompanying drawings.