An Improved Mode of Fastening Pedals to Cranks, also applicable to other Cycle Parts.
Year: 1897

page_text: Date of Application, 17th June, 1897
Complete Specification Left, 12th Mar., 1898-Accepted, 30th Apr., 1898
PROVISIONAL SPECIFICATION.
An Improved Mode of Fastening Pedals to Cranks, also applicable to
other Cycle Parts.
I, THOMAS WILLIAM BLUMFIELD, of Ernest Street Works, Holloway Head, in
the City of Birmingham, Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to an improved mode of fastening pedals to cranks, but
it is also applicable to fastening other parts of a cycle together where a strong
connection is required, which is also easily detachable.
In carrying my invention into effect as applied to fastening pedals to cranks,
I turn that end of the pedal spindle which is to be affixed to the outer end of the
crank to a taper configuration, with the larger diameter at the outer extremity,
and the smaller diameter next the pedal shoulder. In the end of the crank I also
provide a tapered hole to receive the tapered end, and I provide a split in the end
of the crank controlled by a strong pinching screw. To attach the pedal to the
crank I force the large end of the tapered part of the pedal spindle through the
small end of the aperture in the end of the crank, and I then screw up the pinching
screw to close the split, thus causing the tapered part to be firmly gripped within
the crank end in such manner that the shoulder of the pedal spindle is forced by
the taper firmly against the surface of the crank. By this method I produce a
very secure fastening which is at the same time simple and easily removed.
My invention may be applied to other parts of a cycle, where an expanded end
can be clipped within an aperture also tapered, which aperture is controlled by one
or more pinching screws operating on one or more splits.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham,
Agents for the Applicant.
An Improved Mode of Fastening Pedals to Cranks, also applicable to
other Cycle Parts.
I, THOMAS WILLIAM BLUMFIELD, of Ernest Street Works, Holloway Head, in
the City of Birmingham, Engineer, do hereby declare the nature of this invention
[Price 8d.1

page_text: and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
My invention relates to an improved mode of fastening pedals to cranks, but
it is also applicable to fastening other parts of a cycle together where a strong
connection is required, which is also easily detachable.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to.—
Figure 1 is a front elevation showing a portion of a pedal pin and of a crank,
the two parts being connected together in accordance with my invention.
Figure 2 is a view of the pedal pin part alone and Figure 3 a view of the crank
part alone.
Figure 4 is a side elevation showing the crank and pedal pin in connection.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect as applied to fastening pedals to cranks,
I turn the end A¹ of the pedal pin or spindle A which is to be affixed to the outer
end of the crank B to a taper configuration, with the larger diameter at the
outer extremity, and the smaller diameter next to the pedal pin shoulder. In the end
of the crank I form a tapered hole as. B¹ to receive the tapered end A¹ of the
pedal pin A, and I provide a split in the end of the crank controlled by a strong
pinching screw. To attach the pedal to the crank I force the large end of the
tapered part of the pedal pin through the small end of the aperture in the end of
the crank, and I then screw up the pinching screw to close the split, thus causing
the tapered part to be firmly gripped within the crank end in such a manner that the
shoulder of the pedal pin is forced by the taper firmly against the surface of the
crank.
.
By this method I produce a very secure fastening which is at the same time
simple and can be easily detached if required.
My invention may be applied to other parts of a cycle, where a tapered end can
be clipped within an aperture also tapered, which aperture is controlled by one or
more pinching screws operating on one or more splits.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The improved mode of fastening cycle parts substantially as described.
2. The combination comprising a cycle pedal pin having a tapered extremity
for entering a correspondingly tapered aperture in the split end of a crank,
substanially as and for the purpose described and as illustrated.
111 1
1 1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham,
Agents for the Applicant.