Improvements in Driving Gear for Bicycles, Tricycles, and Motor Cycles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving Gear for Bicycles, Tricycles, and Motor
Cycles.
I, JAMES GOW SMITH, of 68, Bradford Street, Chester, in the County of Chester,
Joiner, do hereby declare the nature of this invention to be as follows:-
By connecting two rotary crank axles running parallel in the same direction with
a connecting rod and a lever securely fixed thereto in such a position that the lever
will so pull or push the cranks against the axles as to cause more power and speed.
The lever can be made any length but will only describe the same circle as
described by the connecting rod and cranks.
I will here describe this invention as applied to a safety bicycle on each end of the
axle which passes through a sleeve in the hub of back wheel are securely fixed crank
arms about six inches long. Above the same and outside the rim of bicycle wheel
are exactly similar axle and crank arms but fastened in position with brackets fixed
to bicycle frame. The crank arms on each side of the wheel are connected together
with a connecting rod and lever attached thereto. The levers are about twenty-four
inches long and extend towards the front wheel of bicycle in a horizontal position
the connecting rods being fixed at an angle of about a hundred degrees from the
levers. One lever and rod combined forming the shape of a L lever.
When driving the bicycle the crank arms, connecting rods and levers revolve in the
same direction and each describe the same circle.
I claim the lever connected to two rotary cranks, cog or chain wheels. The
connecting rod and lever permanently fastened together and revolving in the same
direction.
The bicycle is geared up with mutiplying cog wheels. The large wheel being
keyed to driving shaft, the small wheel keyed to hub and the intermediate double
wheel running loose on a stud fixed to the fork of bicycle wheel.
In applying this invention to motor engines the arm driven from the cylinder or
other power would be connected to the end of the lever and the two rotary cranks,
cog, chain or other wheels would be fixed something similar to the bicycle before
described.
Wath Dave of Cantambay 1005
COMPLETE SPECIFICATION.
Improvements in Driving Gear for Bicycles, Tricycles, and Motor
Cycles.
JAMES GOW SMITH, 68, Bradford Street, Chester, Joiner, 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 consists of connecting two rotary crank axles running parallel in

page_text: the same direction with a connecting rod and lever permanently fixed thereto in such
a position that the levers will so pull or push the cranks against the axles as to cause
more power and speed.
The lever and connecting rod combined form a L lever and the lever can be made
any length but will only describe the same circle as described by the connecting rod
and cranks.
I will here describe the invention as applied to a safety bicycle.
The construction and application of my invention will be readily understood on
reference to the annexed drawing and the following explanation thereof.
Figure 1 in the drawing is a side elevation of the machine through the line A-B
in Figure 2 and Figure 2 is a transverse section of the same through the line C-D
in Figure 1-a, a being the main frame b, b the main axle c, c the crank arms d, d
the connecting rod and lever and e, e the auxiliary shaft.
On each end of the main and auxiliary axles are keyed crank arms c, c with studs
secured to ends thereof on which the connecting rod and lever run loose being kept
in position by a nut or pin.
The gear wheel f, f is permanently secured to main axle and geared into double
gearwheel gg which runs loose on a stud secured to main frame and gears into h-a
small gear wheel permanently secured to the hub of driving wheel i, i which runs
loose on the main axle.
The gear wheels shown on the drawing consist of large cage wheels formed of
rollers geared into small sprocket wheels.
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:-
The lever connected to two rotary crank or cog wheels the connecting rod and lever
permanently fixed together and revolving in the same direction.
The First day of June in the year of Our Lord One Thousand Eight Hundred and
Ninety-eight.
JAMES GOW SMITH.