IMPROVEMENTS IN THE DRIVEING MECHANISM OF VELOCIPEDES
Year: 1884

page_text: EDWARD BARLOW Smallware Manufacturer 11 Robert Street Patricroft I do
hereby declare the nature of said invention for IMPROVEMENTS IN THE DRIVEING
MECHANISM OF VELOCIPEDES to be as follows:-
To obtain a more uniform power or speed by obviateing the dead centres, with a
wheel either grooved or plain, upon the axle, or another shaft running parallel
with it, and constituteing the driveing shaft, this wheel is propel'd by a swivel
wedge, or a wheel with hole bored from the true centre and being connected to
the same shaft by a leaver or treadle, when the full side of the eccentric wheel is
pressed against the other wheel, they lock each other fast, untill released by a
backward movement of the treadle See drawing This eccentric lock motion,
enables me to tread a quarter circle instead of a half circle, therefore I get no
dead centres and this is why I call it a. Centreless motion without any loss of
power or speed, as usual, the relative proportion of driver and driven regulates the
speed.
A A Axle shaft.
B B Driveing do.
CC, CC Grove wheels.
DD, DD Levers.
EE Catches, or Eccentric wheels.
FF Treadles.
GG Chain and chain wheels.
HH Suspension brackets for holding driving shaft.
JJ Large driving wheels.
K K Saddle.
LL Handles. Levers.
MM Steering rod.
N Foot rest.
O.Steering wheel.
By pressing down F F. at the treadle end, it raises the end to which is
attached E E, which has the effect of locking the two wheels fast, untill the pressure
is taken off, when, the lever rises at the treadle end, through the weight of the
excentric wheel upon that end of the lever to which it is attached.

page_text: COMPLETE SPECIFICATION.
EDWARD BARLOW Smallware Manufacturer 11 Robert Street Patricroft N
Manchester Lancashire I do hereby declare the nature of my invention for
IMPROVEMENTS IN THE DRIVEING MECHANISM OF VELOCIPEDES and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The simple novelty consists of a grooved wheel fixt upon a shaft, and a con-
necting rod extending a few inches beyond the whole diameter of the wheel at
each extremity, but working loose, upon the same shaft as the grooved wheel; at
one extremity is fixt a stud, and an excentrix wheel, or section of wheel the other
end. answers as treadle, by pressing the full side of the excentrix against the
grooved wheel, it cannot pass, but becomes wedged fast, but by reverseing the
motion, becomes loose again, consequently, by alternate movements, the grooved
wheel is forced forward in the direction of the full side of the excentric; by
excentric wheel, I mean a wheel bored away from the true centre, and only a
section of a wheel is required.
The excentric wheel end of the connecting rod, may be heavier than the treadle
end, and as it is worked horisontally will, fall loose of its own gravity, or, it may
be made as light as possible and be pull'd down by a spring, now, my sole aim is
to avoid any dead centres, therefore I use a driveing chain wheel double the usual
diameter in comparison to the driven chain wheel, this would of itself require
double power for the same speed of stroke and would give double speed also, but
this is avoided by the length of the treadle end of the connecting rod, which is
made to traverse twelve inches, or about the usual distance trod, while the groove
and driveing chain wheels, perform a quarter of a circle thus I arrive at the same
speed and power; unlike the rotary motion, I can take any length of stroke up to
Twelve inches at pleasure, not haveing any centres to pass over, but can work
every, or any part of the circle, with nearly uniform results compared to power.
Referring to the drawing accompanying my Provisional Specification
A A Aula chaft

page_text: the pressure is taken off, when, the lever rises at the treadle end, either through
the weight of the excentric wheel or by a spring attached to it, thus, by alternate
movements ie the rise and fall of the treadles, the groove and chain wheels, are
forced forward, or round.
Having now particularly described and ascertained the nature of my said
improvements and in what manner the same is to be performed I declare that
what I claim is
1st A grooved wheel and an excentric V wheel working together.
2nd AV wheel and an exentric grooved wheel working together.
3rd Two plain wheels, one being bored from the true centre, working together,
and thereby obtain a lock by the movement of the excentric wheel, or section of
a wheel, which is all that is required.