Improved Means for Securing Velocipede Cranks on their Spindles.
Year: 1892

page_text: Date of Application, 3rd Mar., 1892
Complete Specification Left, 3rd Dec., 1892-Accepted; 3rd. Mar., 1893
PROVISIONAL SPECIFICATION.
Improved Means for Securing Velocipede Cranks on their
Spindles.
I, DALE MARSHALL, of 23, Bennington Street, Cheltenham, Gloucestershire,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows:
This invention consists of the hereindescribed improved means for securing
velocipede cranks on their spindles so as to permit of the said cranks being readily
removed from the said spindle and replaced thereon.
I will describe my invention as applied to one only of the cranks but it is to be
understood that my invention is similarly applied to both cranks.
In fixing a velocipede crank on to its spindle in accordance with my invention
I employ a taper pin made with a head at its larger end or otherwise formed so that
it can be turned by a spanner or other device. The smaller end of this pin is screw
threaded and by preference parallel.
"
The said taper pin passes transversely through a taper hole in the boss of the
crank and through a sinall rounded hollow in the spindle. The said hole is tapped
at its smaller end for the screwed part to engage with. The said pin is made of
about the same taper as a key so that when the pin is inserted in the crank and
turned the screw threaded end of the pin engages with the tapped end of the hole
and draws the said taper part of the pin tightly in the hole and thus secures the
crank firmly on its spindle.
Dated this 2nd day of March 1892.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improved Means for Securing Velocipede Cranks on their
Spindles.
I, DALE MARSHALL, of 23, Bennington Street, Cheltenham, Gloucestershire,
Cycle Manufacturer 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 consists in the hereindescribed improved means for securing
velocipede cranks on their spindles so as to permit of the said cranks being readily
removed from the said spindle and replaced thereon.
In order that my invention may be more clearly understood I have annexed the
accompanying sheet of drawings which illustrate my invention as applied to one
only of the cranks but it is to be understood that my invention is similarly applied
to both cranks.
Fig. 1 is part sectional plan view of a velocipede crank shewing my improvements
applied thereto.
Fig. 2 is side view shewing part of the spindle onto which the crank is fastened.
When fixing the crank A onto the spindle B in accordance with my invention
I employ a taper pin C made with a head a at its larger end or otherwise formed
so that it can be turned by a spanner or other device. The smaller end of the said
pin C is screw threaded at b and by preference parallel, (see Fig. 4).
The said taper pin C passes transversely through the taper hole D (see Fig. 2)
formed in the boss of the crank A and through a small half round hollow or

page_text: C
slot e formed in the spindle B (see Fig. 3). The said hole D is tapped at its smaller
end for the screwed end of the pin C to engage with. When the pin C is
inserted in the hole D and turned the screw threaded end of the said pin C
engages with the tapped end of the said hole D thereby drawing the said taper
part of the pin C tightly in the hole D and against the hollow part c of the
spindle B, thus securing the crank A firmly on the said spindle, B. It will be seen
that when the pin C becomes loose it can easily and readily be adjusted by giving
the said pin C another turn or part of a turn.
By the employment of the screwed taper pin C taking into the tapped hole D
I am enabled to more firmly secure velociped cranks on their spindles than has
hitherto been the case.
Having now particularly described and ascertained the nature of my said inven-
*tion and in what manner the same is to be performed, I declare that what I
claim is :-
:―
Firstly Securing velocipede pedal cranks onto their spindles by means of the
taper screw threaded pin C or equivalent in the manner substantially as herein
shewn and described.
Secondly-Securing the taper pin C transversely into the hole D formed in the
solid end of the crank A, the smaller end of the said hole D being tapped so as to
engage with the screw threaded end of the pin C substantially as herein shewn and
described.
:-
Thirdly The means substantially as herein shewn and described for adjusting
the pin C when required.
Dated this 1st day of December 1892.
DALE MARSHALL.