Improvements in Driving Mechanism of Velocipedes and other Machines.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving Mechanism of Velocipedes and other
Machines.
WILLIAM TURNER LORD, 16, Davies Street, Grosvenor Square, London, W.,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
-
I form attachable pieces to existing pedals and cranks of velocipedes (or in
some cases, I build pedals and cranks in combination with the improvements)
for the purpose of obtaining greater leverage for propulsion, or at will greater
resistance for back pedalling. To make this clear, I will describe one form
of the attachable gear. I attach to the inner end of a pedal an eccentric with its
ring and rod (the end of which has a hinged joint) so that the pedal pin screw
protrudes through the eccentric. To the pedal end of crank I pivot at about
right angles a short arm, in which is screwed the pedal as if to the crank and the
jointed end of rod is fixed near the axle end of crank. When the machine
is driven, the eccentric alternately pulls upon and forces against the the jointed
rod and moves to and fro the arm pivotted upon crank, and with it, the pedal,
and in effect shortens or lengthens the leverage. In some cases, I fit the
eccentric with suitable clutches to increase leverage.
Datad 20th love of a 1800
WILLIAM TURNER LORD.
Improvements in Driving Mechanism of Velocipedes and other
Machines.
WILLIAM TURNER LORD, 16, Davies Street, Grosvenor Square, London, W.,
Electrical Engineer, 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:-
I make additions to existing pedals and cranks of velocipedes, or I specially
make pedals and cranks to combines the parts I shall refer to, for the purpose of
obtaining greater leverage for the propelling part of the revolution of the crank
and also, when the greater leverage is required on the opposite side of the revolu-
tion as for example, when power is wanted for back pedalling, I so arrange my
gear that by turning the pedal over, the increased leverage is transferred to the
back, this I accomplish preferably in the following manner, although I provide
for a change of details to effect the same purpose

page_text: In the drawing, Fig. 1 gives an inside face view of a crank A with gear
attached by which it will be seen that a rocking link B is pivotted on end of A
at L, the outer end of 13 is formed like an ordinary crank end to carry the
pedal C. An eccentric dise is placed between B and C, the end of pedal
pin D, passing through E to to screw to B, and the inner end plate of pedal C
is attached to disc E to make eccentric and pedal work together. The ring F
of the eccentric has a connecting rod G which is jointed, and fixed to crank A
near crank shaft H. It will therefore be seen that as the foot moves the pedal,
it also moves the eccentric E, and as E revolves; B is made to rock to or from
the crank shaft centre H, thus giving shorter or longer leverage.
By turning the pedal up side down the eccentric action causes the leverage
to reverse so as to give greater power for back pedalling.
Ball or any suitable bearings can be used where requisite or clutches could
be inserted between eccentric and ring so as to allow the eccentric to revolve
only one way in F. An extension piece K may be combined with pedal for the
better control of the eccentric, this may be duplicated for the reverse action.
In some cases I may use a small crank in place of the eccentric, or I may
fix the gear on both sides of pedal for carrier tricycles and the like. Fig. 2
shews the crank at the back part of the revolution. The connecting rod G, can
be made adjustable for length, for varying extreme throw of pedal.
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
1 claim is:
1. Combinations as herein described forming lengthening and diminishing
cranks.
2. Eccentrics fixable between cranks and pedals for the purpose herein set
forth.
3. Reversing power combinations as herein described.
4. Combinations of link eccentric and eccentric rod entirely upon the crank
for the purpose set forth.
Dated this 11th day of November 1800