Improvements in Mechanism for Transmitting Power, especially applicable for use in connection with Velocipedes and other Vehicles.
Year: 1897

page_text: Date of Application, 4th Sept., 1897
Complete Specification Left, 4th June, 1898-Accepted, 20th Aug.,
1898
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Transmitting Power, especially
applicable for use in connection with Velocipedes and other
Vehicles.
I, CHARLES LOCK, of 61, Outram Road, East Ham, in the County of Essex,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to improved mechanism for transmitting power and
applicable for transmitting the rotary motion of one shaft to another or for con-
verting reciprocating motion into rotary motion, my improved mechanism being
very advantageously applied for transmitting the driving power of a velocipede or
vehicle to the driving wheel or wheels.
In carrying out my invention I make use of a pair of ropes, chains or the like
each connected at one end to a crank slide or the like to which the driving power
is applied, and passed around the pulleys of a pair of pulley or sheave blocks to
one of which the other end of the rope is attached. One of these pulleys is fixed
relatively with the driven shaft whilst the other is attached to the strap of an
excentric or to a bush or bearing on the crank of the said driven shaft. With
this arrangement it will be understood that as the rope, chain or the like is pulled
the blocks will be drawn together and so act on the crank or excentric to rotate
the driven shaft. I employ two sets of chains and pulleys so that when one set
is rotating the shaft the blocks of the other set will be separated ready for the next
pull. It is to be understood, however, that I may employ more than two sets of
chains and pulleys in connection with a single shaft. It is also to be understood
that each block may have one two or more pulleys and that the rope may be passed
one two or more times around the same according to the desired ratio of travel between
the two ends of the rope or the like.
When my invention is applied to a bicycle the driving cranks advantageously
oscillate instead of rotate, the said cranks carrying segments of the required
diameter for taking up the length of rope or the like requisite for transmitting the
travel to the crank or excentric.
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2
1
1007
COMPLETE SPECIFICATION.
Improvements in Mechanism for Transmitting Power, especially
applicable for use in connection with Velocipedes and other
Vehicles.
I, CHARLES LOCK, of 61, Outram Road, East Ham, in the County of Essex,
5 Engineer, do hereby declare the nature of this invention and in what manner the
CD 017

page_text: Figure 3 is a view illustrating a modification.
a indicates the under frame of the vehicle and b, c the travelling wheels, d, d are
ropes which serve to transmit motion from one pair of wheels to the other and both
of which are arranged in a similar manner so that the description of one only will
be sufficient.
e is a double sheaf pulley block fixed to the frame a and f is a rod attached at
one end to a erank or eccentric on the axle of the wheel and at the other end
provided with two pulleys g, g.
The rope
d is connected at one end to a pin on the wheel b then passed around
one of the pulleys of the block e, then over one of the pulleys g, then around the
other pulley of the block e and thence around the second pulley the end of the
rope being secured to the block e.
With this arrangement as the wheel b rotates
in the direction of the arrow the rope d during half of its revolution will be pulled
and tend to draw the pulleys g,g and the rod f towards the pulley block e thereby
imparting motion to the wheels c.
It will be obvious that each rope will only be pulled whilst the wheel is
rotating from the position h to the position in Figure 1; it is therefore necessary
to so arrange the two ropes that one of the ropes is always acting to rotate the
wheels the rope which is not in operation being pulled out by its eccentric ready to
be again shortened in a manner which will be understood.
I may employ more than two sets of chains or pulleys in connection with a
single shaft and I may pass the rope over any desired number of pulleys it only
being necessary that the extent of pull imparted to the rope shall correspond with
the extent of movement which is to be imparted to the part to be driven in order
that the desired ratio of travel between the two ends of the rope or the like may be
maintained.
When my invention is applied to a bicycle the driving cranks advantageously
oscillate instead of rotate, the said cranks carrying segments of the required
diameter for taking up the length of rope or the like requisite for transmitting the
travel to the crank or eccentric.
I sometimes connect the driving end of the rope or chain to a wheel on the axis
or shaft carrying the driven crank or eccentric, the said eccentric being located
on one side of the wheel and the rope connected to a pin on the other side as shewn
in Figure 3.

page_text: 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:-
The improved mechanism for transmitting motion consisting in the employment
of a rope one end of which is attached to a driving crank or other device and the
other end of which is fixed after the rope has been passed over fixed pulleys and
pulleys on the end of a rod connected to the crank or eccentric to be driven,
substantially as described.