A New or Improved Driving Gear for Cycles and other Machinery.
Year: 1893

page_text: Date of Application, 1st Mar., 1893
Complete Specification Left, 1st Dec., 1893-Accepted, 1st Mar., 1894
PROVISIONAL SPECIFICATION.
A New or Improved Driving Gear for Cycles and other Machinery.
I, JOSIAH JACKSON of 35 Catherine Street, Coventry, in the County of
Warwick, Machinist, do hereby declare the nature of my said invention to be as
follows:-
:-
My invention has for its object a new or improved driving gear for cycles and
other machinery by which I convey the motion from one crank to another at the
same time reversing the motion and retaining the same speed of travel in both
cranks by which means in the case of cycles I am able to connect the treadle with
the driving wheel without the necessity of an intermediate toothed wheel or a
chain.
1
I will proceed to describe my invention as applied to an ordinary safety bicycle
to the crank of which I pivot a rod, the other end of which is provided with a slot
which works upon a stud fixed upon the end of the other crank or eccentrically
upon a toothed wheel upon which toothed wheel or crank a grooved cam is fixed
having a stud working in its groove which stud is fixed to the connecting rod so
that the sliding of the connecting rod on the crank stud is controlled by the travel
of the rod stud in the cam groove. In a position between the two cranks a stud is
fixed upon the rod and works in a slide fixed upon the framework of the machine
forming also a travelling pivot. By these means the one crank rotates in a reverse
direction to the driving crank and at the same time by means of the shaped cam
which controls the slide in the rod both cranks continuously revolve at the same
speed. In a cycle the toothed wheel on the cam gears with the toothed driving
wheel and thus the machine is driven without a chain or an intermediate toothed
wheel between two others as well known.
Dated this 28th day of February 1893.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.
COMPLETE SPECIFICATION.
A New or Improved Driving Gear for Cycles and other Machinery.
I, JOSIAH JACKSON, of 35 Catherine Street, Coventry, in the County of
Warwick, Machinist, do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement :-
My invention has for its object a new or improved driving gear for cycles and
other machinery by which I convey the motion from one crank to another at the same
time reversing the motion and retaining the same speed of travel in both cranks by
which means in the case of cycles I am able to connect the treadle with the
driving wheel without the necessity of a large intermediate toothed wheel or a
chain.
I will proceed to describe my invention as applied to an ordinary safety bicycle,
to the crank of which I pivot a rod, the other end of which is provided with a slot
which works upon a stud fixed upon the end of the other crank or eccentrically
upon a toothed wheel upon which toothed wheel or crank a circular groove or
grooved cam is fixed having a stud working in its groove which stud is fixed to the
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page_text: connecting rod so that the sliding of the connecting rod on the crank stud is
controlled by the travel of the rod stud in the groove. In a position between the
two cranks a stud is fixed upon the rod and works in a slide fixed upon the frame-
work of the machine forming also a travelling pivot. By these means the one
crank or wheel rotates in a reverse direction to the driving crank and at the same
time by means of the groove or shaped cam which controls the slide in the rod both
cranks continuously revolve. In a cycle the toothed wheel on the cam gears with
the toothed driving wheel and thus the machine is driven without a chain or an
intermediate toothed wheel between two others as is usually done.
In place of the grooved cam I may only use a circular groove and I may provide
other arrangements to obviate any slight back lash which may occur.
In order that my invention may be clearly understood and more easily carried
into practise I have appended hereunto a double sized sheet of drawings upon which
I have fully illustrated the nature of my said improvements.
Figure 1., is an elevation of my improved driving gear A being the hub spindle
of the driving wheel and B the crank shaft of a safety.
Figure 2., is an enlarged elevation of the crank end with the rod E removed.
Figure 3., is a section through Figure 2.
In carrying my invention into effect I pivot one end of the rod E to the crank
wheel Fat the other end being provided with the slot e which works upon the
stud fixed upon the crank around which the circular groove b' is fixed, a stud
works in the groove which stud is fixed to the connecting rod E so that the
sliding of the connecting rod E is controlled by the travel of the stud in the
groove Between the crank and crank wheel F the stud e which is fixed upon
the rod E works in a slot h¹ in the slide H which is fixed upon the framework of
the machine forming also a travelling pivot. It will be seen that the length of
stroke B to b' is not so great as F to f to allow for which the slot is provided in
the connecting rod E and to prevent the back lash the groove b³ is formed on the
crank the stud 3 bearing the roller which runs in the said groove and thus
prevents the shake. The relative distance of the cranks F, f' and B, b' may vary,
and in some cases, it will be found necessary to form the groove 6 more or less cam
shaped, as indicated by dotted lines . By these means the crank wheel F rotates
in a reverse direction to the driving crank and at the same time by means of the
groove which controls the slide in the rod E both cranks continuously revolve at
the same speed. In a cycle the toothed wheel F gears with the toothed driving
wheel A. and thus the machine is driven without a chain or an intermediate toothed
wheel between two others as well known.
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 :-
:-
A new or improved driving gear for cycles and other machinery substantially as
and for the purpose herein set forth and shown upon the drawing.
Dated this 30th day of November 1893.
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.