IMPROVEMENTS IN MEANS OR APPARATUS FOR GIVING MOTION TO SEWING AND OTHER MACHINES
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by Frederic Newton Gisborne at
the Office of the Commissioners of Patents, with his Petition, on
the 29th December 1868.
I, FREDERIC NEWTON GISBORNE, of 445, West Strand, in the County
of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MEANS OR APPARATUS FOR GIVING MOTION TO SEWING AND
OTHER MACHINES," to be as follows:-
For this purpose I employ a weight which by special arrangements
of gearing gives motion to a toothed pinion taking into a toothed wheel
fixed on the driving shaft of the machine, or, if desired, motion may be
communicated to such driving shaft by means of pulleys and straps
or bands.
The following is the mode in which I arrange the parts so as to give
a quick speed to the driving wheel or pulley by means of a small amount
of fall to a heavy weight. The weight is connected to a drum or pulley
by means of a chain, cord, or band, which is wound upon such drum or
pulley in any suitable manner, as will be readily understood. Upon the
axis of this drum or pulley is fixed a broad internal toothed wheel, which
is caused to rotate by the falling of the weight, and in so doing it gives

page_text: motion to a toothed wheel carried by an arm mounted loosely upon the
axis, and causes such arm to travel around the axis. This toothed wheel
gives motion to a pinion also mounted loosely on the axis and fixed
rigidly to another arm carrying another toothed wheel, which in its
rotation around the axis also receives motion from the internal toothed
wheel, but at an increased speed, and so on, there being as many pinions
and arms carrying toothed wheels mounted on the axis as may be
required to obtain the desired speed, the last pinion being fixed to a
toothed wheel giving motion to the drum or toothed wheel by which the
driving axis of the machine is driven. And in order to enable the speed
to be regulated as desired I employ a brush surface which is pressed up
against the periphery of a wheel by means of a screw so as to apply
such an amount of friction thereto as may be required to regulate
the speed.
For the purpose of stopping the apparatus, as may be required when
working, I employ a treadle which is connected to a strap or band
passing around the outside of the internal toothed wheel so that by
depressing the treadle the strap or band may be caused to stop the
motion of the apparatus. Or if it be desired to stop the driving
apparatus so that it may be left at rest, I employ a stop, which comes
against projections or recesses in one of the wheels. If desired, a spring
may be employed instead of a weight, and instead of employing the
arrangement above described I mount the toothed pinions and wheels
loosely upon two axes of motion, a toothed pinion and wheel being
rigidly fixed together and mounted in pairs intermediate of each other
on each shaft or axis. The weight or spring may, if desired, be wound
up by hand; or according to one part of my Invention the weight of
the attendant on a seat or platform may effect this object; or the
weight of the attendant may be employed instead of the weight first
described, the attendant being supported on a seat or platform capable of
moving to and fro through a given space. The return of the seat or
platform being caused to take place immediately upon its being vacated
by the attendant.