Improvements in or connected with Cranks and Change Gear of Cycles and other like Vehicles.
Year: 1893

page_text: Date of Application, 12th Jan., 1893
Complete Specification Left, 3rd May, 1893-Accepted, 2nd June, 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Cranks and Change Gear of
Cycles and other like Vehicles.
We, GEORGE PILKINGTON MILLS, and DAVID WILLIAM BASSETT, both of
Humber & Co., Ltd., of Beeston, in the County of Nottingham, Cycle Manu-
facturers, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide better means of attaching the crank to
the gear wheel of cycles and the like, especially cycles with which one or more
change wheels are supplied, and which are designed so that the crank and gear or
chain wheel can be removed or detached from the cycle, and substituted by a crank
and wheel of different dimensions for the purpose of obtaining a different speed for
the vehicle, or of economically utilizing a different quantity of power.
By this invention the crank and change gear may be made lighter and more
suitable for racing purposes than heretofore, the attachment of the gear wheel to
the crank being permanent and stronger and not liable to get out of truth.
For the purpose of our invention, the wheel is sweated, brazed, or similarly
attached to a flange or projections on the axle end of the crank, or attached thereto,
and is afterwards rivetted to the said flange or projections. A shoulder is formed
on the wheel which fits into a recess in the crank, in order to facilitate fitting, and
to keep the wheel true relatively to the crank and crank axle. Other equivalent
means for keeping the wheel and axle true may be employed.
In applying our invention to cycles for racing purposes, one of the cranks may
be an ordinary light keyed crank, and the other constructed as above described,
the whole being made as light as is consistent with the strength required.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or connected with Cranks and Change Gear of
Cycles and other like Vehicles.
We, GEORGE PILKINGTON MILLS, and DAVID WILLIAM BASSETT, both of
Humber and Co., Ltd., of Beeston, in the County of Nottingham, Cycle Manu-
facturers, 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, reference being had to the accompanying drawings and to
the letters and figures marked thereon, that is to say :-
The object of this invention is to provide better means of attaching the crank to
the gear wheel of cycles, and the like, especially cycles with which one or more
change wheels are supplied, and which are designed so that the crank and gear or
chain wheel can be removed or detached from the cycle, and substituted by a
similar crank and wheel of different dimensions for the purpose of obtaining a
different speed for the vehicle, or of economically utilizing a different quantity of
power.
By this invention the crank and change gear may be made lighter and more
suitable for racing purposes than heretofore, the attachment of the gear wheel to
the crank being permanent and stronger and not liable to get out of truth.

page_text: For the purpose of our invention, the wheel is sweated, brazed, or similarly
attached to a flange or projections on the axle end of the crauk, and is afterwards
rivetted to the said flange or projections. A shoulder is formed on the wheel
which fits into a recess in the crank in order to facilitate fitting and to keep the
wheel true relatively to the crank and crank axle. In cycles where extreme
lightness is required one of the cranks may be constructed in any ordinary well
known way, by which lightness is obtained, and the other constructed according to
our invention.
In order that our invention may be readily understood we proceed to describe
the same fully with reference to the accompanying drawings in which :-
Fig. 1 is a front elevation of the crank and gear or chain wheel.
Fig. 2 is a section on the line A, B, of Fig. 1, and
Fig. 3 is a side elevation of the crank and gear or chain wheel.
a,
a is the crank, preferably constructed of the shape shown, formed with or having
a notched flange or series of projections corresponding to the arms of the gear
or chain wheel c', at the axle end. The said notched flange or series of projections h,
is attached to the centre portion of the gear wheel by rivets d, and by sweating or
brazing. The gear wheel c¹ is provided with a shoulder e which fits into a recess
in the crank so as to ensure the truth of the wheel relatively to the crank and
crank axle. The wheel and crank when brazed or sweated and rivetted together
are secured to the axle f by means of a taper bolt g and nut h, and can be easily
detached from the axle by unscrewing the nut and knocking out the taper bolt
when it is desired to substitute a wheel similarly constructed but of different
diameter, or one fixed to a crank of different length. It is obvious that a wheel
and crank constructed as above described can be made to weigh less than an
ordinary light keyed crank and chain wheel because the ordinary boss of the chain
wheel is not required, while it has to advantages of being firm and true and easily
detached for the substitution of other change wheels of similar construction.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. In cranks and change gear for cycles, attaching the crank to the wheel by
sweating or brazing and afterwards rivetting, substantially in the manner
hereinbefore described and shown.
2. In cycle cranks and change gear connected together by brazing and rivetting
in the manner described, the employment of a taper bolt and nut for attaching
same in a detachable manner to the driving axle.
3. Our improvements in or connected with cranks and change gear of cycles and
other like vehicles, substantially as hereinbefore described and shown by the
annexed drawings.
Dated thin on
1000
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 6, Victoria Street, Nottingham,
Agent for the Applicants.