Improvements relating to Cranks for Cycles and for like purposes.
Year: 1897

page_text: Date of Application, 6th Mar., 1897
Complete Specification Left, 4th Dec., 1897-Accepted, 5th Feb., 1898
PROVISIONAL SPECIFICATION.
Improvements relating to Cranks for Cycles and for like purposes.
I, GEORGE PRICE, of Rea Brass Casting Works, Charles Henry Street, in the City
of Birmingham, Manufacturers, do hereby declare the nature of this invention
to be as follows:-
This invention consists of improvements relating to cranks for cycles, motor-cars,
and like purposes, my object being to provide more simple and effective means
whereby the crank spindle and pedal pin or other parts can be more readily, and
effectually secured to the crank than with the fastenings at present in general use.
In the application of my invention I form both ends of the crank spindle, or the
end of the pedal pin or like part to be inserted within the crank, of a conical con-
figuration and with longitudinal grooves therein, to fit within a correspondingly
tapered eye or hole in the crank. The tapered eye has lugs or projections from its
surface which fit within the longitudinal grooves on the crank spindle or other
part, and by causing the conical end of the spindle to fit tightly within the tapered
eye of the crank and the lugs or projections of the one to engage with the grooves
of the other, I obtain a ready means for effectually securing the two parts together.
Lateral or side movement of the spindle or pin within the crank eye is prevented
by the frictional contact of the parts, but to ensure that no such movement shall
occur when the crank is in service, I employ a screwed stem on the extremity of
the tapered part of the spindle or pin for the reception of a lock nut, or any other
suitable means for preventing loosening of the frictional contact of the surfaces.
: 5th day of Mov 1897
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.
Improvements relating to Cranks for Cycles and for like purposes.
I, GEORGE PRICE, of Rea Brass Casting Works, Charles Henry Street, in the City
of Birmingham, 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 of improvements relating to cranks for cycles, motor-
cars, and like purposes, my object being to provide simple and effective means
whereby the crank spindle and pedal pin can be more readily and effectually
secured to the crank than with the fastenings at present in general use.
In constructing a self-wedging spindle and crank in accordance with my

page_text: invention I form both ends of the crank spindle, or the end of the pedal pin or like
part to be inserted within the crank, of a conical configuration and with longi-
tudinal grooves therein, to fit within a correspondingly tapered eye or hole in the
crank. The tapered eye has lugs or projections from its surface which fit within
the longitudinal grooves on the crank spindle or other part, and by causing the
conical end of the spindle to fit tightly within the tapered eye of the crank and the
lugs or projections of the one to engage with the grooves of the other, I obtain a
ready means for effectually securing the two parts together.
Lateral or end movement of the spindle or pin within the crank eye is prevented
by the frictional contact of the parts, but to ensure that no such movement shall
occur when the crank is in service, I employ a screwed stem on the extremity of the
tapered part of the spindle or pin for the reception of a lock nut, or any other
suitable means for preventing loosening of the frictional contact of the surfaces.
Referring to the accompanying sheet of explanatory drawings:-Figure 1 is a
front elevation and Figure 2 an end elevation of a portion of a crank spindle as
made in accordance with my invention, whilst Figures 3 and 4 are similar views
of the crank to which such spindle is secured.
Figure 5 is a front elevation representing the crank spindle and crank secured
together.
Figure 6 is a front elevation and Figure 7 an end elevation representing a
modified formation of the crank spindle ends, whilst Figures 8 and 9 are similar
views representing a further modification.
The same reference letters in the different views indicate the same parts.
Referring to Figures 1 to 5 inclusive, each end of the crank spindle A is made of
a conical or tapered form to fit within the correspondingly tapered eyes of the
crank B. On each of such conical ends I form grooves as a to fit the lugs or pro-
jections b in the eye of the crank B. After the insertion of the crank spindle end
in the eye of the crank I screw the stud C within a tapped hole up the centre of
the spindle end.
Instead of making the conical or tapered ends of the crank spindle of a circular
section or configuration as at Figures 1 and 2, I sometimes make such ends of a
triangular form as at Figures 6 and 7, or of a square section as at Figures 8 and 9,
the eye in the crank boss being made in each case to a corresponding form to the
crank spindle ends. With such triangular or square crank spindle ends no pro-
jections are required within the eyes of the crank or corresponding grooves on the
crank end itself.
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:-
The improved formation and arrangement of parts whereby the crank spindle
and pedal pin of a cycle, motor-car, or the like, can be readily and effectually
secured to the crank, substantially as described and as illustrated.
Dated this 3rd day of December 1897.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.