Improved Chainless Driving Gear for Cycles.
Year: 1898

page_text: Date of Application, 25th Feb., 1898
Complete Specification Left, 27th May, 1898-Accepted, 1st Oct., 1898
GEORGE THORNHILL, 16, Oldham Road, Manchester, Professor of Musie, do hereby
declare the nature of this invention to be as follows:--
An intermediate wheel marked B, coming between driving wheel on axle
marked C, and driving wheel on back wheel of cycle marked A; such intermediate
wheel having rollers or pulleys marked D, in place of teeth or other projections, and
working loose on ball, roller or other bearings.
Sizes of wheels will be varied according to speed, & power required.
Improved Chainless Driving Gear for Cycles.
GEORGE THORNHILL, 16, Oldham Road, Manchester, Professor of Music, do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:—
An intermediate wheel coming between driving wheel on axle and driving wheel on
back wheel of cycle, such intermediate wheel having rollers or pulleys in place of
teeth or other projections, and working loose on ball roller or other bearings.
Sizes of wheels will be varied according to speed & power required.
Drawings as left with provisional specification and additional drawings accom-
panying complete specification.
EXPLANATION OF DRAWINGS.
A. Driving wheel on back wheel of cycle: varying in size according to speed &
power required.
C. Driving wheel on axle of cycle, varying in size according to speed and power
required.
B. Intermediate wheel coming between and connecting driving wheel on back
wheel of cycle marked A, and driving wheel on axle of cycle marked C.
D. Pulleys or rollers on intermediate wheel marked B, on which teeth on driving
wheel on axle marked C, and teeth on driving wheel on back wheel of cycle marked A
work. Connecting and transmitting power (almost without friction) generated by
cyclist propelling driving wheel on axle of cycle marked C.
E. Stud on which pulley or roller D revolves, and held in position.

page_text: F. Section of intermediate wheel B, forming frame to hold in position stud E, and
pulley D.
METHOD OF MOUNTING INTERMEDIATE WHEEL.
Arm of the frame of cycle connecting axle bracket-(on which axle driving wheel C
is fixed) with and supporting back wheel of cycle on which driving wheel A is fixed-
is divided the portion of arm extending from C(past the centre of wheel B: about
an inch) passes on the inside of wheel B, and the portion from A (passes the centre
of B wheel about an inch) on the outside. Stud (passing through slot in arm on
the outside of wheel B-then through centre of wheel B, & then through arm
passing on the inside)-is firmly fastened thus perfectly mounting wheel B in
position. Wheels A, B, & C, thus being & working true, direct in line.
:
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 :-
1. An intermediate wheel marked B, coming between and connecting driving
wheel on axle marked C, and driving wheel on back wheel of cycle marked A.
2. Pulleys or rollers marked D in place of teeth on such intermediate wheel
marked B.
3. An intermediate wheel coming between and acting as connecting link, between
driving wheel on an axle and driving wheel on another axle, and subsequently to
the driving wheel on back wheel or wheels of cycle.
Dated this 20th day of August 1898.