Improvements in the Driving Gear of Velocipedes or other Machines Propelled by Manual Power.
Year: 1893

page_text: Date of Application, 29th Nov., 1893
Complete Specification Left, 28th Aug., 1894-Accepted. 10th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Driving Gear of Velocipedes or other Machines
Propelled by Manual Power.
ARTHUR HUGHES 21 Pittville Street Cheltenham Cycle Manufacturer do hereby
declare the nature of this invention to be as follows: :-
In the usual manner of propelling velocipedes, the pedals rotate concentric to
the axis of the ordinary crank, which has about six inches of leverage or throw.
The object of this invention is to cause the pedals not to rotate concentric, and
by so doing to enable a person to obtain a few more inches of leverage, without
any greater stretch than if driving in the ordinary way.
For example, we make say a six inch crank, but instead of fitting a pedal to the
extremity as is usually done, we form a suitable bearing to receive the axis of
another crank, say of three inch throw, and fit the pedal to the end of this three
inch crank. On the axis of this crank we fix a gear wheel, and also fix a similar
gear wheel, over the axis of the six inch crank, but this one is so fixed to the
frame of the velocipede or machine, that it cannot revolve with the cranks. Now
when these wheels are coupled up, by means of an endless chain, band, cogs or any
other convenient method, we shall find on driving the velocipede or machine, that
at one point of the revolution, the pedal will be nine inches from the axis of
the six inch crank, while at the opposite point, it will only be three inches from
the same. By this arrangement we get nine inches of leverage or throw, without the
pedal having to traverse an eighteen inch circle. The sizes of the cranks herein
mentioned need not be adheared to any convenient size would do.
Dated this 28th day of November 1893.
ARTHUR HUGHES.
Improvements in the Driving Gear of Velocipedes or other Machines
Propelled by Manual Power.
ARTHUR HUGHES Cycle Manufacturer 21 Pittville Street Cheltenham 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 :--
In the usual manner of propelling velocipedes, the pedals rotate concentric to
the axis of the ordinary crank which has about six inches of leverage or throw.
The object of this invention is to cause the pedals not to rotate concentric, and
by so doing to enable a person to obtain a few more inches of leverage at the most
advantageous position of the pedal, without having to reach the same distance as
would be the case if the pedal rotated concentric to the axis of the ordinary
crank.
For example I make say a six inch crank A, but instead of fitting a pedal to the
extremity as is usually done, I form a suitable bearing to receive the axis of another
crank B, say three inchs throw, and fit the pedal to the end of this three inch crank
at C, on the axis of this three inch crank I fix a gear wheel D and also a gear wheel E
over the axis of the six inch crank (this said six inch crank, being as usual fixed on
the inain driving axle F of the velocipede or machine) but this gear wheel is so fixed
to the frame of the velocipede or machine that it cannot revolve with the cranks.
Now when these said gear wheels are coupled up by means of an endless chain,
37

page_text: band, cogs or any other convenient method, we shall find on driving the velocipede
or machine that at one point of the revolution.of the main driving axle (whereon
the said six inch cranks are fixed as usual) that the pedal will be about nine
inches from the centre, yet when it reaches the opposite point in its revolution, it
will only be about three inches from the said centre of the main driving axle ;
by this arrangement I get about nine inches of leverage or throw without the
pedal having to traverse say a circle of about eighteen inches. The sizes of
cranks herein mentioned need not be adhered to, any convenient lengths would do.
Having now particularly described and ascertained the nature of r
my said
invention and in what manner the same is to be performed, I declare that what I
claim.is;
The arrangement of cranks so geared as to cause the pedal during its revolution
round the main driving axle, to traverse farther from, and nearer to, the centre of
the said main driving axle of velocipedes or other machines driven by manual
power as hereinbefore described.
Dated this 25th day of August 1891
.ARTHUR HUGHES.