Improvements connected with Bevil or like Gear for Cycles and Mechanism generally.
Year: 1896

page_text: Date of Application, 28th Sep., 1896.
Complete Specification Left, 28th July 1897-Accepted, 4th Sept., 1897
PROVISIONAL SP.
TION.
Improvements connected with Bevil or like Gear for Cycles and
Mechanism generally.
I, WILLIAM SPEIRS SIMPSON, of 49 Battersea Park Road, London, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements connected with bevil or like gear for
Cycles and mechanism generally.
For the purpose of my invention, I form one bevil wheel with teeth for half
the depth or length of its working face and then by an intermediate cone gear
I transfer the motion to a second bevil wheel having teeth for half the depth or
length of its working face but the reverse of the first mentioned wheel.
Thus suppose I desire to increase speed of a Cycle driven by gear, I have the
teeth on the smaller diameter of the first wheel i.e. from the pedal, to drive through
the idle cone wheel the other wheel which has teeth on the larger diameter only
and then through the shaft I repeat the gear to the axle or hub of the rear drive
wheel of the Machine.
I may however employ perfect bevil toothed wheels and arrange them at
different distances on their shafts or axles from the point d'appui to gear into
different parts of the cone intermediate wheel.
The result is, I obtain a slight increase of speed from the first gear and augment
it at the second gear. For slow motions the several half toothed wheels can be
reversed.
1000
H. GARDNER,
166 Fleet Street, London, Patent Agent,
Agent for the said William Speirs Simpson.
Improvements connected with Bevil or like Gear for Cycles and
Mechanism generally.
I, WILLIAM SPEIRS SIMPSON, of 49 Battersea Park Road, London, Civil
Engineer, 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 improvements connected with bevil or like gear for
Coles and maak. iam canonall

page_text: For the purpose of my invention, I form one bevil wheel with teeth for half
the depth or length of its working face and then by an intermediate cone gear I
transfer the motion to a second bevil wheel having teeth for half the depth or
length of its working face but the reverse of the first mentioned wheel.
Thus, suppose I desire to increase speed of a Cycle driven by gear, I have the
teeth on the smaller diameter of the first wheel i.e. from the pedal to drive through
the idle cone wheel the other wheel which has teeth on the larger diameter only,
and then through the shaft I repeat the gear to the axle or hub of the rear drive
wheel of the Machine.
I may however employ perfect bevil toothed wheels and arrange them at
different distances on their shafts or axles from the point d'appui to gear into
different parts of the cone intermediate wheel.
The result is, I obtain a slight increase of speed, from the first gear and augment
it at the second gear. For slow motions the several half toothed wheels can be
reversed.
My invention will be clearly understood by reference to the annexed drawings
which show it as applied for use with a rear driving Cycle.
In carrying my invention into practice, I mount on the pedal axle A. a bevil
wheel B, the size or diameter of which is such that it engages with the smaller
diameter or depth only of the teeth of a cone shaped intermediate wheel C, this
being held to the frame D or lower bracket of the Machine by the brace E, the
socket F of which is affixed to a tubular leg of the back fork G and within which
the shaft H of the wheel I has rotation.
The wheel I is in gear with the larger diameter or circumference of the coned
intermediate or idle wheel C for transmitting the motion from the pedal axle A to
said shaft H and through it to the bevil pinion J on the rear end of the shaft H,
this wheel J being in gear with the smaller diameter or circumference of the
cone shaped intermediate or idle wheel K of the second set of gear and through
which intermediate wheel K the bevil wheel L on the hub of the rear drive wheel
is driven, the teeth of said rear driver being in gear with the larger diameter or
larger circumference of the cone shaped wheel K. This cone wheel is carried
by the brace M, the upper leg N of which is affixed to the back stay P of the
Machine frame.
When my said invention is employed for Cycle driving, as before explained,
the ordinary chain gear is dispensed with, the driving being by the gear named.
This bevil tooth gear is very smooth in its action, is less noisy while travelling,
the gear has great power for Hill climbing and a steady continuous bite with the
rear wheel while on a level Road.
The gear can be readily cleaned after removing the front plate of the casing Q,
and a change of gear easily effected by the removal of the cone wheels C and K,
and the substitution of others of larger or smaller diameters, as found
convenient.
I have shown the intermediate wheels C and K with full teeth, but if they be
made in two parts on the same bosses different numbers and sizes of teeth can
be cut for gearing into pinions or wheels having a less or a larger number of
teeth as desired. The pinions and wheels already shown vary in the two sets in
their respective number of teeth, and this can be amplified in any convenient
manner.
I prefer the toothed gear as shown, but fluted or plain frictional gear similarly
arranged can be substituted.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is:
1. The arrangement of gear shown on the annexed drawings, as and for the
purposes set forth.
2. The employment of bevil gear in which the teeth of an intermediate wheel

page_text: engage with two pinions of different diameters and on separate axles for speeding
or for power purposes substantially as described especially as rear Cycle driving
appliances as represented in the drawings.
H. GARDNER,
166 Fleet Street, London, Patent Agent,
Agent for the said William Speirs Simpson.