Improvements in the Manufacture of the Cranks of Bicycles, Tricycles, and other Velocipedes, and other like Cranks.
Year: 1898

page_text: Improvements in the Manufacture of the Cranks of Bicycles, Tricycles,
and other Velocipedes, and other like Cranks.
We, JOHN VERNON PUGH, of Cumnor Cottage, Leek Wootton, near Kenilworth,
in the County of Warwick, Mechanical Engineer, and HEBER ISAAC PEDLEY, of
No. 17, Dora Road, Birmingham, in the County of Warwick, Mechanical Engineer,
do hereby declare the nature of this invention to be as follows:
-
;
:
Our invention consists in manufacturing the cranks of bicycles, tricycles and
other velocipedes and other like cranks such for example as the cranks of sewing.
machines by the process or combination of processes herein after described, whereby
the manufacture of the said cranks is economised.
We will describe our invention in connection with the manufacture of a bicycle.
crank.
We form a bar preferably by rolling of sheet steel (or the metal or alloy of.
which the crank is to be made) the said bar having a breadth somewhat greater.
than the length of the crank to be made. The said bar has at and near its edges
a thickness somewhat greater than the thickness of the axle end of the crank to.
be made, the middle part of the bar being somewhat thicker than the body of
the crank to be made.
By means of cutting dies or tools, we cut from the said bar, blanks from which,
the cranks are by finishing processes to be made.
In cutting blanks from the said bars, the head or axle end of the crank is cut
from one of the thick edges of the bar, the body of the crank being formed from:
the thinner part of the bar. That is, the blanks cut from the bar have the head:
or axle end of one blank alternating with the pedal end of the next blank, both the.
thick edges of the bar being utilized to form the axle end of the cranks. Although
the crank blanks thus cut from the bar alternate with one another in the way
described, we prefer to cut the bar so that the whole of one of its thick edges shall
be utilized before the other thick edge is operated upon, the blanks, the axle ends.
of which are formed from one thick edge, being cut at such a distance apart that
there is left between them sufficient metal for the cutting of the bodies of the-
cranks, the heads of which are cut from the other thick edge of the bar by revers-
ing the position of the bar end for end after the first series of blanks has been cut. .
Dated this Fifth day of February 1898.
:
W. T. WHITEMAN,
Agent for the Applicants.

page_text: Improvements in the Manufacture of the Cranks of Bicycles, Tricycles,
and other Velocipedes, and other like Cranks.
We, JOHN VERNON PUGH, of Cumnor Cottage, Leek Wootton, near Kenilworth,
in the County of Warwick, Mechanical Engineer, and HEBER ISAAC PEDLEY, of
No. 17, Dora Road, Birmingham, in the County of Warwick, Mechanical Engineer,
do hereby declare the nature of our invention and in what manner the same is
to be performed to be particularly described and ascertained in and by the follow-
ing statement:--
Our invention consists in manufacturing the cranks of bicycles, tricycles and
other velocipedes and other like cranks,. such for example as the cranks of sewing
machines, by the process or combination of processes hereinafter described whereby
the manufacture of the said cranks is economised.
We will describe our invention in connection with the manufacture of a bicycle
crank.
We form a bar of steel or the metal or alloy of which the crank is to be made,
preferably by rolling, the said bar having a breadth somewhat greater than the
length of the crank to be made. The said bar has at and near its edges a thick-
ness somewhat greater than the thickness of the axle end of the crank to be made,
the middle part of the bar being somewhat thicker than the body of the crank to
be made.
By means of cutting dies or tools, we cut from the said bar, blanks from which
the cranks are by finishing processes to be made as hereinafter particularly described.
Figure 1 of the accompanying drawing represents in plan a portion of a bar of
steel produced by rolling processes from which bar we obtain by the use of cutting
dies or tools, crank blanks, the parts of the said bar on which the dies and tool
operate being indicated in dotted lines; Figure 2 is a cross section of the said bar
and Figures 3 and 4 represent in plan and longitudinal section respectively a
crank blank obtained from the bar Figures 1 and 2.
In cutting blanks from the said bar Figures 1 and 2 the head or axle end of the
crank is cut from one of the thick edges a, a of the bar, the body of the crank
being formed from the thinner or web part 6 of the bar. That is, the blanks cut
from the bar have the head or axle end of one blank alternating with the pedal
end of the next blank, both the thick edges of the bar being utilized to form the
axle end of the cranks. Although the crank blanks thus cut from the bar alternate
with one another in the way described, we prefer to cut the bar so that the whole
of one of its thick edges shall be utilized before the other thick edge is operated
upon, the blanks, the axle ends of which are formed from one thick edge, being
cut at such a distance apart that there is left between them sufficient metal for the
cutting of the bodies of the cranks, the heads of which are cut from the other
thick edge of the bar by reversing the position of the bar, end for end after the
first series of blanks has been cut as will be understood by an examination of
Figure 1 the cranks to be cut out being indicated in dotted lines.
Although we have described and represented and prefer to employ a rolled bar
having two thick edges yet a bar having in cross section approximately the section
of the crank blank Figure 4 might be employed, the axle ends of the blanks all
being produced from the one thick edge of the bar.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we declare that we
claim as our invention:
The improvements in the manufacture of the cranks of bicycles. trieveles and

page_text: other velocipedes and other like cranks herein before described and illustrated in
the accompanying drawing the said improvements consisting in first producing
by rolling a bar of steel or other hard metal or alloy having one or both of its
longitudinal edges of a thickness somewhat greater than the thickness of the axle
ends of the cranks to be made, the main or body part of the bar having a thickness
somewhat greater than the body part of the cranks to be made the breadth of the
bar being somewhat greater than the length of the said cranks to be made, cutting
from the said bar by means of dies or tools crank blanks and by ordinary dressing
and finishing processes converting the crank blanks into finished cranks substan-
tially as herein before described and illustrated.
Dated the Nineteenth day of September 1898.
JOHN VERNON PUGH,
HEBER ISAAC PEDLEY.