IMPROVED MECHANICAL ARRANGEMENTS OR MOTOR FOR CONVERTING RECIPROCATING MOTION INTO ROTATORY MOTION, APPLICABLE TO VELOCIPEDES AND FOR OTHER PURPOSES
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Joseph Kellett at the Office of the
Commissioners of Patents on the 29th August 1881.
JOSEPH KELLETT, of Laister Dyke, Bradford, in the County of York, School-
master. "IMPROVED MECHANICAL ARRANGEMENTS OR MOTOR FOR CONVERTING
RECIPROCATING MOTION INTO ROTATORY MOTION, APPLICABLE TO VELOCIPEDES AND
FOR OTHER PURPOSES."
This Invention relates to a mechanical arrangement by which velocipedes and
other machines in which cranks are commonly employed may be driven without
the aid of such cranks.
For the purpose of explaining my Invention I will describe it as applied to a
bicycle laving wheels of large diameter (say from 7 to 8 feet), which are fixed on
an axle or shaft of suitable length to allow of a framework being employed, fitted
with seat and foot board, and which is suspended loosely from the shaft and
between the wheels.
I place a loose double pulley on the shaft, having projecting flanges, and on one
or both faces of the outside projecting flanges I secure a pin or stud on which⚫
works a pawl which gears in the teeth of a catch or ratchet wheel secured on the
shaft; the pawl is made to gear in the teeth of the catch or ratchet wheel by a
spring, and the wheels are prevented from turning backwards, the pawl only acting
in one direction. A cord or flexible band or chain is attached at one end to a
hook or stud fixed in one of the bodies of the double pulley, and is then wound
round one or more times, passing from there to and over a grooved guide pulley
fixed to the foot board and back again to the other body of the double pulley,
under which it is passed and round which it is wound one or more times, and the
end is secured to the pulley.
A cross bar or other handle is fixed to the lower cord or chain, by which motion
is given to the double pulley and by the latter through the pawl and catch or
ratchet wheel to the axle or shaft of the bicycle.
An extra guide pulley if necessary may be fixed on an extension of the suspended
frame work in a horizontal line from the axle of the bicycle and perpendicularly
over the pulley fixed on the foot board.
The manner in which motion is imparted to the wheels of the bicycle is as
follows: The person being seated under the axle, with his feet planted on the

page_text: foot board, pushes the handle attached to the chain or cord towards the pulley
fixed between his feet, and by so doing causes the double pulley to revolve on the
axle, winding the cord or chain on one of the bodies of the double pulley and
unwinding it from the other; then taking a stroke similar to a stroke in rowing,
the handle is drawn towards the rider, and by so doing causes the pawl to come in
action on the catch or ratchet wheel, and thus actuating the shaft and giving a
rotatory motion to the wheels, the forward movement of the handle towards the
feet is repeated, and the momentum gained by the first stroke, together with the
easy action of the double pulley on the axle, allows the backward pull of the
handle to be repeated and the motion of the bicycle to be maintained; extra seats
might be fixed in the suspended frame work if required, with pullies and similar
driving motors to each, and in the case of a four wheeled velocipede one or more
of these motors might be applied to either axle. In four wheeled velocipedes the
seat may be fixed over the axle and a rocking lever employed to the top of which
the cord or chain is attached.
It will be obvious that the motor is applicable to working lathes, sewing
machines, and other kind of machines usually driven by cranks.
.