AN IMPROVED MOTIVE POWER FOR DRIVING VELOCIPEDES, SEWING MACHINES, AND FOR OTHER SIMILAR PURPOSES
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by George Joseph Pedley and
Hermann Grabowski at the Office of the Commissioners of Patents,
with their Petition, on the 28th May 1869.
We, GEORGE JOSEPH PEDLEY, of Harborne, in the County of Stafford,
Gutta Percha Manufacturer, and HERMANN GRABOWSKI, of Willenhall,
in the County of Stafford, aforesaid, Engineer, do hereby declare the
nature of the said Invention for "AN IMPROVED MOTIVE POWER FOR
DRIVING VELOCIPEDES, SEWING MACHINES, AND FOR OTHER SIMILAR PURPOSES,"
to be as follows:-
The object of this Invention is by the means herein-after mentioned
to produce an improved motive power which may be usefully employed
for the purposes named in the title.
The Invention consists substantially in a coiled or helical spring acted
upon by hydraulic pressure, and what is claimed is, the combination of
the two forces for the purposes above referred to.
Our Invention is carried into effect in the following manner :-A
cylinder of suitable size and diameter being provided, there is also pro-
vided a coiled or helical spring corresponding in diameter to the inside

page_text: of the cylinder, and of such a length that when expanded or in its
normal condition it may also correspond to the said cylinder in length,
or nearly so, but when compressed, to its full extent therein it may only
occupy a small space; a water-tight piston is then provided, which
goes against one end of the said coiled spring, and the cylinder is then
closed by water-tight flanges; water is now pumped into the cylinder
by any convenient means until the piston acting upon the spring com-
presses it to its utmost extent, and when the spring is allowed to go
back to its normal condition the motive power claimed by our Invention
is brouglit into effect, and it may be either used at once or as will be
readily understood by confining the water in the space it now occupies
the motive power thus acquired may be retained until it is required.
In what has been said a single action only has been spoken of, such
as would be suitable for driving sewing machines and other pieces of
machinery where, it may be applied; but to drive velocipedes, and for
other similar purposes, a double action is needed, and this is provided by
fitting the cylinder before described with a piston at each end of the said
cylinder, and which pistons are simultaneously acted upon by foroo
pumps in the same manner described as applicable to the single-action
cylinder already mentioned. Attached to the pistons herein-before
mentioned are piston rods, and these by means of suitable cranks,
trains of wheels, or other mechanical equivalents aro brought into
communication with those parts of the machines required to be driven.
Thus in the case of a sewing machine the motive power herein-before
described as contained in the cylinder would act upon the piston, and
this propelling the piston rod outwards would through the mechanical
contrivanocs just referred to act upon the fly wheel or part required to
be driven. In the case of a velocipede the same motive power would
when required act upon the two pistons herein-before referred to, driving
them outwards, and the necessary propelling power would thus through
the piston rods be communicated to the cranks provided, so as to cause
the wheels of the velocipede to revolve.