An Improved Driving Gear for Cycles.
Year: 1892

page_text: Date of Application, 22nd Mar., 1892
Complete Specification Left, 16th June, 1892-Accepted 16th July, 1892
PROVISIONAL SPECIFICATION.
An Improved Driving Gear for Cycles.
NATHANIEL DAVIS 21 Sherborne Place Cheltenham Gloucestershire Cycle
Maker do hereby declare the nature of this invention to be as follows:-
Consists of two plain faced wheels recessed to receive india rubber bands, driven
by an endless belt.
Two wheels with rims 14 in. wide, the rims of which are turned out (or recessed)
to receive an india rubber band 1 in. wide in each, one wheel being fixed on driving
wheel, & the other on crank axle, the two being connected & driven by an endless
leathern belt 1 in. wide.
01 of Man 190
NATHANIEL DAVIS.
COMPLETE SPECIFICATION.
An Improved Driving Gear for Cycles.
I, NATHANIEL DAVIS of 21 Sherbourne Place, Cheltenham, in the County
Gloucester, Cycle Maker, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:—
My invention has for its object an improved driving gear for cycles by which
means the cost of producing a bicycle, tricycle or any other cycle is much reduced
besides the repair of such is much simplified indeed any cyclist could with ease
carry with him the necessary gear to quickly repair his machine in case of any
breakdown happening. The power which is gained by the adaption of my inven-
tion is very greatly enhanced and hill climbing becomes a much more simple affair
besides there is scarcely any vibration such as is felt with the ordinary gear.
Another great advantage is the fact that the gear would not require to be adjusted
on account of the wear as at present and is of much longer duration.
The manner in which I carry my invention into effect is as follows:-Instead of
the two toothed wheels over which the ordinary chain wheel gears, I mount two
wheels like flanged pullies which have rims or flanges projecting above their edge
for the purpose of receiving an india rubber band which would fit tightly to the
surface of the wheel one wheel would be fixed upon the crank axle over these two
wheels a leather belt or band would be placed and to obviate any means of the band
stretching I should make the belt of two pieces stitched together. The rubber
round the two wheels being for the purpose of giving a grip to the belt and would
give a great elasticity to the machine.
Referring to the drawings.
Figure 1, is an illustration of my invention applied to an ordinary safety bicycle
but of course it could be easily applied to any form of cycle.
Figure 2, shews the two gear wheels A. and B in front sectional elevation with
the rubber band a' and leather band C.
Figure 3 shews a cross section through line 1-2 in which the rims d¹ and d³
on each side of the wheel are seen and section of the rubber a¹ and leather
band C.
The main great feature of my invention is having india-rubber or its equivalent
around the rim of wheels A and B for the purpose as before explained of giving
grip to the leather belt and prevents any possibility of its slipping in any way.
may of course cement these rubber bands to the wheels or let them simply bind
themselves by friction.

page_text: I may also only have a single leather band but I have found that two bands
stitched together are better for the purpose.
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:-
-
'
1st. The improved driving gear for cycles consisting of a leather belt C either
double or single passing over two wheels such as A and B which are surrounded
by india rubber bands as and for the purpose herein set forth and described.
2nd.-Gear wheels for the purpose of driving cycles having fixed upon their rims
bands of india rubber as and for the purpose herein set forth.
Dated this 13th day of June 1892.
NATHANIEL DAVIS.