Improvements in Driving Mechanism for Bicycles, Tricyoles, and other Road Vehicles Propelled by Manual Power.
Year: 1894

page_text: Date of Application, 10th July, 1894-Accepted, 11th Aug., 1894
COMPLETE SPECIFICATION.
Improvements in Driving Mechanism for Bicycles, Tricyoles, and
other Road Vehicles Propelled by Manual Power.
ALBERT RUBENS SAWYER 135 Barras Bridge Newcastle-on-Tyne Photographer
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 improvement in the construction of bicycles and tricycles and other road
vehicles propelled by manual labour.
The object of this invention is to give extra power to propel the machine by the
adoption of the complex lever as described in Specification and drawings.
The framework A' A' A' A' A' A' is of the ordinary construction of the existing
bicycles and tricycles with the required strength of iron or steel material to support.
the weight and tension upon the machine.
The back wheel and front wheel is of the ordinary construction as shown on
drawing.
The lever B which is connected with the rack D at S and the connecting rod C
at N and the axle of the fulcrum M fixed on the frame A' at M to the required
distance from connecting rod C at N to give more or less power as may be
required.
The connecting rod C is connected to a crank Z fixed at centre of chain wheel
the length of crank from centre of chain wheel to be to the extent the connecting
rod rises and falls to allow the crank to revolve the circle of the diameter of crauk,
the chain wheel g is fixed upon the portion of framework A' allowed to extend
beyond the centre of the back wheel.
A smaller chain wheel H is fixed at the centre of back wheel to the size for
the required motion to be attained and the chain X is connected to g and H.
The cogged rack D is connected to the lever B at S to the distance from fulcrum
and extends down to the cog wheel K a sufficient number of cogs to be allowed on
rack to the extent the lever rises and falls the rack is pressed against the cog
wheel with the spring Z¹ or other methods to keep it in position when in motion.
The pedal L is connected to the cog wheel K which constitutes a second lever
to act with the lever B to give more power when the foot is pressed upon the pedal
it causes the rack D to rise and fall to force lever B up and down to the distance
required for the connecting rod C to rise and fall to the distance of the diameter
the crank Z revolves at chain wheel 9. Cogged wheels and chain or a crank could
be utilized instead of rack D and cog wheel K as illustrated on drawing if
required.
At the opposite side of machine there is fixed two cog wheels R shown in dotted
lines on the cog wheel K the pressure of the foot on the opposite pedal causes the
rack D to rise and fall to raise and lower the lever B to the required distance.
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:
The novelty of the complex lever is the extra power derived from lever B acting
as a second lever in conjunction with the pedal lever L the levers B and L combined
giving considerable more power to propel the machine.
Dhis out
T.L 1004