Improvements in and relating to Cycles.
Year: 1894

page_text: Date of Application, 7th Aug., 1894
Complete Specification Left, 6th May, 1895-Accepted, 8th June, 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Cycles.
FRANCIS MURK KETTON Mayfield Grove Nottingham Cycle Manufacturer do
hereby declare the nature of this invention to be as follows:-
This invention relates to improved means, applicable to bicycles and tricycles
for the purpose of enabling the driving chain wheel to be readily changed for
another wheel of a different size, the object of the invention being the construction
of an interchangeable and combined crank and wheel which may be fastened
together and to the crank axle by the same fastening.
According to this invention the chain wheel is provided with an eccentric boss
to which is attached a short axle, and the crank, in addition to the hole fitting the
crank axle is provided with an additional hole for fitting the short axle in the
chain wheel, such hole being in addition to the usual hole fitting the crank axle.
The crank is also provided with a hole for a cotter pin the position of this hole
being such, that when the wheel and crank are placed on the crank axle, the cotter
pin binds upon the crank axle and the axle on the chain wheel.
The extru axle may be carried by the crank, and the chain wheel be provided
with a hole to receive the same, and also a hole for the cotter pin which would he
between the two axles.
The wheel or crank may have more than one axle, and the crank or wheel a
similar number of holes, and there may be a cotter pin to all or any of the
extra axles.
Dated this 4th day of August 1894
FRANCIS MURR KETTON Mayfield Grove Nottingham Cycle Manufacturer do
hereby declare the nature of this invention and in what mauner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in the means for attaching the chain
wheel and crank of a cycle to the crank axle, and has for its object the provision
of means for connecting the chain wheel and crank to each other and to the crank
axle with the same fastenings, thus enabling the wheel or crank to be changed for
others of a different size in a ready and simple manner.
According to this invention the boss of the chain wheel is provided with an
extension or additional boss to which a pin is securely fastened. The crank is
provided with a hole for the crank axle and the pin in the chain wheel, and also
with a hole for a cotter pin, this hole being between the axle and pin on the chain
wheel, and these latter are grooved for the reception of the cotter pin. The cotter
TD 077

page_text: pin thus fastens the crank to its axle, and at the same time fastens the crank to the
chain wheel.
This invention and the manner of carrying out the same is illustrated by
the accompanying drawings which are referred to in the following detailed
description.
Fig. 1 is a sectional elevation of a wheel and crank connected together and to
the crank axle by a single cotter pin, and
Fig. 2 is a part front elevation of the same.
In the arrangement shown the boss a of the chain wheel is made with an
extension a¹ or a separate boss may be used. To this extensiou there is attached
hy any well known means a piu e, and the crank is provided with a hole for
receiving the pin when the crank and wheel are brought together. By these
means the crank and wheel are compelled to rotate together, and they are
connected to the crank axle e by a cotter pin which passes between the axle and
the pin and is arranged to bear upon both, the axle and pin being recessed for the
reception of the cotter.
With this arrangement the crank and wheel can be removed from the axle after
the cotter has been withdrawn, they can then he separated and either changed for
a corresponding piece of different size. The parts can be as easily refixed and the
arrangement constitutes what is known as interchangeable gear.
Instead of the arrangement shown the wheel may be provided with two or pins,
and in the case of two pins they may be on opposite sides of the axle, and there
may be a separate cotter to each pin, or the boss of the wheel may be long enough
to take the cotter pin and have a hole for the reception of a pin fastened to the
crank, but in all cases the cotter pin is placed between the crank axle and the pin
in the wheel or crank.
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 :-
1. Attaching the chain wheel and crank of a cycle to each other and to the crank
axle by means of a single cotter pin passing between the crank axle and a pin
carried by the chain wheel or crank and fitting a hole in the crank or chain wheel
substantially as herein shown and described and for the purpose specified.
2. Attaching the chain wheel and crank of a cycle to each other and to the crank
axle by means of two cotters, one on each side of the axle and between the axle
and pins carried by the wheel or crank and fitting holes in the crank or wheel as
herein described for the purpose specified.
Dated this 4th day of May 1895.
W. H. POTTER, M.I.M.E.,
Newcastle Chambers, Nottingham, Patent Agent.