Improved Gearing for Bicycles and like Vehicles.
Year: 1894

page_text: Date of Application, 27th June, 1894
Complete Specification Left, 8th Mar., 1895-Accepted, 22nd June, 1895
PROVISIONAL SPECIFICATION.
Improved Gearing for Bicycles and like Vehicles.
I, WILLIAM THOMAS SUDWORTH, 62 Arkwright Street, Nottingham, Bicycle
Manufacturer, do hereby declare the nature of this invention to be as follows:-
One end of each crank axle bracket has an excentric secured on it, on the
excentric a lock nut chain wheel and toothed pinion revolve. The pinion gears
into an interiorly toothed wheel keyed fast on the crank axle. A ball race is
formed in the circumference of the excentric and provided with one or more sets
of balls running between the excentric and the chain wheel and toothed pinion.
The diameters of the toothed pinion and interiorly toothed wheel will vary
according to the speed required.
Dated this Twenty-sixth day of June 1894.
H. W. GOUGH, C.E.,
Agent.
Improved Gearing for Bicycles and like Vehicles.
I, WILLIAM THOMAS SUDWORTH of 62 Arkwright Street, Nottingham, in the
County of Nottingham, Bicycle 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 relates to gearing for bicycles and like vehicles and will be best
understood by reference to the accompanying drawings in which :-
Figures 1 and 2 are vertical sections of gearing constructed according to this
invention, the former taken on the line 1-1 of Figure 2, and the latter on the
line 2-2 of Figure 1.
Like letters represent like parts throughout the drawings.
In carrying my invention into practice I secure to one end of the crank axle
bracket A, which may otherwise be constructed in, the ordinary manner, an
eccentric B which in conjunction with a ring B¹ screwed thereon constitutes the
inner race for a ring of balls C. The eccentric B as shown may conveniently be
formed in one with the cup D for the adjacent ring of balls D₁ which supports
the crank or driving axle E at one end of the bracket A a similar ring of balls D'
being provided to support the crank axle E at the other end of the bracket A.
As shown the cup D may screw into the end of the bracket A thus fixing the
eccentric B to the bracket.
Upon the ring of balls C is mounted a spur pinion F so as to rotate freely
thereon and the boss F1 of this pinion is screw threaded to receive the internally
screw threaded boss G¹ of the chain-wheel G, and the lock nut E.
The pinion gears with the internally toothed wheel I which may be rigidly
secured by a flange J' or in other convenient manner to the adjacent crank J or
directly to the crank axle.
When the crank J is rotated the pinion F and chain wheel G will be rotated in
the same direction but faster, the ratio of the two velocities depending upon the

page_text: difference in the respective diameters of the wheel I and pinion F which may be
varied according to the gear required.
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 a gear for cycles and like vehicles the combination with the crank axle of
an internally toothed wheel such as I secured thereon and a pinion such as F of
ring-form gearing with the wheel I and secured to the chain wheel G and mounted
eccentrically to and so as to rotate independently of the crank axle substantially
as described and illustrated in the accompanying drawings.
2. In a gear for cycles and like vehicles the combination with the crank axle
bracket and one of the ball-bearing cups D thereof of an eccentric such as B
formed in part with the cup and a ring such as B¹ screwing on to the eccentric and
forming in conjunction with the latter the inner race of a ball bearing substantially
as described and illustrated in the accompanying drawings.
3. The combination and arrangement of parts constituting the complete gear
substantially as described and illustrated in the accompanying drawings.
Dated this 27th day of February 1895.
WILLIAM THOMAS SUDWORTH.
Boult & Wade,
Agents for the Applicant.