Improvements in or relating to the Driving Mechanism of Cycles..
Year: 1892

page_text: Date of Application, 13th Sept., 1892
Complete Specification Left, Sth Apr., 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Driving Mechanism of Cycles..
We, GEORGE LANE, Machinist, and HENRY WRIGHT, Cycle Manufacturer,
both of 165 New John Street, Newton Row, Birmingham, do hereby declare the
nature of my said invention to be as follows:-
Our invention consists of improvements in the mechanism or gearing employed.
in the propelling of cycles, our aim and object being to accelerate speed, without
diminishing power.
We will describe our invention thus :-in connection with a safety bicycle.
We employ by preference a frame of a suitable configuration which we term a
double frame, and in or between the parts forming the said frame we arrange our
driving gear as follows,
We place at the centre of the crank-shaft a gear wheel of ordinary construction,
which drives a smaller wheel by means of a chain, placed at a convenient
distance below the seat of the rider, and on a shaft carried in bearings of suitable
construction fixed to the said frame, on the same shaft we employ another gear
wheel with chain, but larger, which is connected to the pinion on the driving wheel
of the machine.
By these means we have the strain of the driving gear wheel centrally between
the bearings on the crank, and consequently being equalized the wear to the
bearings is balanced and vibration of the machine is proportionately diminished..
We can increase the height of the gearing to any desired extent, and at the
same time keep the wheels as small as may be desired.
The gearing being in or between the parts of the frame and the cranks and
pedals outside, the driver meets with no impediment.
Substantially our invention consists of the intervention of an intermediate shaft
between the crank shaft and the driving wheel of the machine upon which we place
two gear wheels of suitable size and construction for the purpose above specified.
With a slight modification in some cases we may use this gearing to single
frames.
Dated 13th September 1892
THOS. KENDRICK,
COMPLETE SPECIFICATION.
Improvements in or relating to the Driving Mechanism of Cycles.
We, GEORGE LANE, Machinist, and HENRY WRIGHT, Cycle Manufacturer
both of 165 New John Street, Newtown Road, Birmingham, do hereby declare the
nature of our said invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
Our invention has reference to the gearing or driving mechanism employed for
propelling cycles, accelerating the speed without diminishing the power.
We will describe our invention by referring to the accompanying drawings, as
illustrating a Safety bicycle, in which the same letters of reference indicate the
same or corresponding parts in all the figures.
Figure 1 is a side view elevation of the framing of a Safety bicycle with our
improved gearing thereto.
Figure 2 is a front view elevation of same.

page_text: a is the frame which we term a double frame, and carrying the driving gear in
or between the same. To the centre of the crank shaft b we arrange the gear
wheel C, and by means of the chain d, drive the smaller gear wheel e, which is
affixed to the shaft f, carried by suitable bearings in connection with the frame a,
to the same shaft f, and adjacent e, we mount another
gear wheel g, somewhat
larger than
which carries the chain h, and this chain is in connection with the
pinion wheel i, upon the driving wheel j, the serrated surfaces k and l, admit of
engaging with each other, at a desired position for imparting proper tension to the
chains d, and h, and secured by the lock nut m, passing through the slots n,
in k and l.
e,
We would observe in conclusion that we do not limit ourselves to the precise
details set forth as modifications may be made without departing essentially from
the principle of our said invention which consists substantially of the intervention
of an intermediate shaft mounted between the crank shaft and the driving wheel
provided with two gear wheels of a required size and construction, for the purposes
'above described.
If the chain d or the chain his slack loosen the lock nut m which will admit of
the serrated surface on k, and the serrated surface on 1, being separated and engaged
in another serration sufficient for the proper tension of d, and h then employ the
lock nut m again upon the screwed pin which passes through the slots n, Fig. 1.
Having now particularly described and ascertained. the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
1st. In a cycle, the construction and intervention of an intermediate shaft mounted
between the crank shaft and the driving wheel, with two geared wheels, with
driving chains in connection with the gear wheel of crank shaft, and pinion wheel
on driving wheel, said chains adjusted by the serrated surfaces, and lock nut
substantially as hereinbefore set forth and described.
2nd. In a cycle, the combination and arrangement of said parts substantially as
and for the purposes hereinbefore described in the foregoing Specification and
shewn on the accompanying sheet of drawings.
Dated 8th April 1893.
THOS. KENDRICK,
Agent.