Improvements in Cranks.
Year: 1896

page_text: Date of Application, 10th Oct., 1896
Complete Specification Left, 26th Jan., 1897-Accepted, 13th Mar., 1897
Improvements in Cranks.
EDWARD BOUVERIE PUSEY, 1st Yorkshire Regiment Curragh Camp Co. Kildare
Ireland an Officer in the Army, do hereby declare the nature of this invention to be
as follows:-
A means of lengthening the throw of the crank in use on cycles, steam, electric
& gas engines, and motor cars and sewing machines, so that when the power is
being brought to bear on the crank the throw of the crank is lengthened which gives
more power than it would if stationery and so that when the power is not applied to...
the crank, the throw of the crank is shortened.
On cycles this is done by means of a pair of rollers working up and down the
length of the crank, attached to another pair of rollers which revolve round a fixed
circular ring of steel or other hard metal the same principal will also apply to all.
engines, motor cars & sewing machines.
Dated this 26th love of Databon 1806
E. EATON,
Agent for Applicant..
COMPLETE SPECIFICATION.
Improvements in Cranks.
I, EDWARD BOUVERIE PUSEY 1st Yorkshire Regiment Curragh Camp County-
Kildare Ireland an Officer in the Army, 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 :-
A means of lengthening the throw of the crank in use on cycles, steam, electric-
and gas engines and motor cars and other machines so that when the power is being.
brought to bear upon the crank, the throw of the crank is lengthened which gives
more power than it would if stationery and is shortened when the power is not applied
to the crank.
In cycles this is done by means of a pair of rollers working up and down the-
length of the crank. Attached to another pair of rollers which revolve around a
fixed circular ring of steel or other hard metal.
In order that my invention may be fully understood I will now refer to the
annexed drawings in which
Figure 1 is a side elevation showing my invention applied to a cycle.
Figure 2. sectional elevation of pedal and showing the position of same.
Figure 3 front view of crank and sliding frame to enlarged scale.
Referring to Figures 1 and 2 a is the crank lever which carries the frame b having
the rollers c which bear upon the crank a. The rollers d engage upon the metal rings.
or guides e and thus causes the frame b to travel upon the crank lever a. The frame b
carries the ordinary pedal spindle f, upon which the tread g is carried. The metal

page_text: guides or rings e are secured to suitable supports or to a suitable part of the frame
of the machine and may be connected together by means of stay rods h or the like for
the purpose of giving rigidity to same, so that upon rotating the cranks a the
frame is caused to travel upon same so that the frame carrying the pedal 9 is
furthest from the centre of the crank when the power is being applied and is
nearest when no power is required or when the pedal is returning to its operative
position.
The curvature of the ring or guides e, may be altered, as required, so as to
regulate the movement of the frame b upon the crank a, which will thus determine
the distance of the pedal tread y from the crank centre i. When desired the
curvature of the rings or guides may be so arranged that the frame b is stationary
upon the crank a during its operative position upon same.
It will be seen that although I have described my invention applied to a cycle, it
is equally applicable to other forms of machines in which a crank is required having
what is known as a "variable throw."
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. In cranks the combined construction and arrangement of the various parts
substantially as described and illustrated herein.
2. In cranks, a movable frame carried upon the crank through the medium of rollers
or bearings said frame carrying the driving pedal or tread and carrying rollers or
bearings which engage upon a curved guide or ring, for the purpose of giving a
variable throw to the frame carrying the pedal tread, all in combination & in the
manner herein described.
Dated this 26th day of January 1897
E. EATON,
Agent for Applicant.