Improvements in and relating to Cycles, Motor-cars, Vehicles driven by Machinery, Machines and Engines required to Produce Great Speed, and the like.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Cycles, Motor-cars, Vehicles driven
by Machinery, Machines and Engines required to Produce Great
Speed, and the like.
I, LEWIS CLEMENT, of 131, Jermyn Street, London, W. Author and Journalist,
do hereby declare the nature of this invention to be as follows:-
-
The object of this invention is to produce in cycles, motor cars, vehicles driven
by machinery, machines and engines required to produce great speed, and the
like, an increase of speed.
The
Now, according to this invention, and taking a bicycle as a subject-object, 1
provide between the pedals sprocket wheel and the driving wheel's sprocket wheel,
a twin sprocket wheel consisting of a small wheel and another twice or three times,
(more or less), as large in diameter as the small one. I use two chains.
first passes from over the pedals' sprocket wheel on to the small sprocket wheel of
the twin sprocket wheel, and the second chain passes from over the big twin sprocket
wheel on to the driving wheel's sprocket wheel.
Dated this with dor of March 1807
L. CLEMENT,
131, Jermyn Street, London, W.
Improvements in and relating to Cycles, Motor-cars, Vehicles driven
by Machinery, Machines and Engines required to Produce Great
Speed, and the like.
I, LEWIS CLEMENT, of 131, Jermyn Street, London, Journalist and Author, 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 has for its object to provide an efficient driving gear specially
applicable in cases where the velocity ratio of the driving and driven wheels is
great, and consists essentially in interposing between them a pair of idle or
intermediate wheels or pulleys of suitable diameters secured together and connected
to the driving and driven wheels or pulleys respectively.
In the accompanying sheet of illustrative drawings:-Fig. 1 is a side elevation
of one arrangement of driving gear constructed according to this invention as
applied to a safety bicycle, and Fig. 2 is a plan of the same.

page_text: The pedal sprocket wheel and the driving hub sprocket wheel are connected
by two chains c d to two intermediate sprocket wheels ef which are secured
together on the same sleeve, or in any other suitable manner and mounted on a
stud bearing or journal 9 adjustably secured in a slot in one leg of the back
fork by means of a nut 7. The axes of all the sprocket wheels lie, preferably, in
the same plane as shown, as by this means the pressure, and consequently the
friction, on the stud bearing gare reduced to a minimum, the driving pulls on
the chain partially balancing one another. The front chain may be adjusted
by means of the sloth and nut 1, while the back chain is adjusted in the
ordinary manner by the usual nut and bolt attachment as will be readily
understood.
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. In a cycle, connecting the pedal and driving wheel sprocket wheels to two
intermediate sprocket wheels secured together and having a common axis situated
between the axes of the said pedal and driving wheel sprocket wheels, and in the
same plane or approximately so substantially as described.
2. In a cycle, the combination of the pedal sprocket wheel a driving wheel
sprocket wheel b, chains c, d, intermediate wheels ef secured together and mounted
on the stud bearing or journal 9 adjustably secured in the slot h of the back fork i.
the whole substantially as and for the purpose specified.
3. The arrangement and construction of driving gear for cycles, substantially
as described with reference to the drawings.
Dated this 16th day of December 1897.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.