AN IMPROVED BLOWING MACHINE APPLICABLE FOR DRAWING OR FORCING FLUIDS
Year: 1878

page_text: LETTERS PATENT to Henry Simon, of No. 7, St. Peter's Square, Manchester,
in the County of Lancaster, for the Invention of "AN IMPROVED BLOWING
MACHINE APPLICABLE FOR DRAWING OR FORCING FLUIDS." A communication
from abroad by Heinrich Krigar, of Hanover, in the German Empire.
PROVISIONAL SPECIFICATION left by the said Henry Simon at the Office
of the Commissioners of Patents on the 9th May 1878.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of Lan-
caster. "AN IMPROVED BLOWING MACHINE APPLICABLE FOR DRAWING Or
FORCING FLUIDS." [A communication from abroad by Heinrich Krigar, of Hanno-
ver, in the German Empire.]
According to this Invention within a casing consisting of two intersecting cylin-
drical segments, the one larger than the other, two touching cylinders are caused to
revolve in opposite directions with equal angular velocity. On the surface of the
one cylinder, whose axis coincides with that of the larger segment of the casing,
there are provided two or more helical cogs projecting so far as to touch the
interior surface of the casing, and in the surface of the other cylinder which fits the
interior segment of the smaller segment of the casing, there are formed helical
hollows or grooves, corresponding with the helical projections of the other
cylinder, so that as the two cylinders revolve the projections of the one engage
with the hollows of the other, like the teeth of wheels gearing with one another.
An inlet passage is provided at the bottom of the one end of the casing, and
an outlet passage is provided at the upper part of the opposite end of the casing.
When the cylinders, which have their shafts geared together, are made to revolve,

page_text: air is drawn in by the inlet passage and forced out at the outlet passage under a
pressure dependant on the velocity of rotation, so as to furnish a blast suitable for
blowing purposes; and in like manner water or other fluid supplied to the casing
is drawn or forced by the action of the revolving cylinders.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by a
the said Henry Simon in the Great Seal Patent Office on the 28th October
1878.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of Lan-
caster. "AN IMPROVED BLOWING MACHINE APPLICABLE FOR DRAWING OR
FORCING FLUIDS." A communication from abroad by Heinrich Krigar, of Hanno- ]
ver, in the German Empire.
According to this Invention, within a casing consisting of two intersecting cylin-
drical segments, the one larger than the other, two. touching cylinders are caused to
revolve in opposite directions with equal angular velocity. On the surface of the
one cylinder, whose axis coincides with that of the larger segment of the casing, 1
there are provided two or more helical cogs projecting so far as to touch the
interior surface of the casing, and in the surface of the other cylinder, which fits
the interior of the smaller segment of the casing, there are formed helical hollows
or grooves, corresponding with the helical projections of the other cylinder, so that
as the two cylinders revolve, the projections of the one engage with the hollows
of the other, like. the. teeth of wheels gearing with one.another; an inlet passage is
provided at the bottom of the one end of the casing, and an outlet passage is
provided at the upper part of the opposite end of the casing.
When, the cylinders, which have their shafts geared together, are made to revolve,
air is drawn in by the inlet passage and forced out at the outlet passage, under a
pressure dependant on the velocity of rotation, so as to furnish a blast suitable for
blowing or other purposes, or for furnishing compressed air; and in like mannor
water or other fluid supplied to the casing is drawn or forced by the action of the
revolving cylinders.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shews a side view of the before-described apparatus; Fig. 2, an end view;
Fig. 3, a plan, with the top of casing removed; and Fig. 4, a cross section.
The cylinder a, provided with the helical cogs c and the cylinder b, having
corresponding helical grooves d, are made to revolve in opposite directions, as
indicated by the arrows, Fig. 4, in the casing e, f, of which the upper part f is remove-
able. The axes of the cylinders are geared together by spur wheels outside tlio
casing, the axis of a being driven by a pulley i and strap. The air or other fluid
to be propelled or exhausted enters the casing, at g at one end, and after being
carried round in the spaces between the cogs c and the casing, issues through the
discharge pipe at the other end. The cylinders a, b, are made to work in close

page_text: contact with cach other, and the cogs c work close against the circumference of the
casing, and also in close contact with the bottom of the grooves d of the cylinder b,
which itself fits the smaller segment of the casing. This cylinder might also be
provided with helical cogs working in grooves in the cylinder a, thus rendering the
machine double acting. Both parts of the casing would then have to be of the same
diameter.
Having thus described the nature of the said Invention and in what manner the
same is to be performed, as communicated to me by my foreign correspondent,
I claim, constructing apparatus for drawing or forcing air and other fluids wherein
two cylinders are made to revolve in opposite directions in contact with each other
inside a casing, the one cylinder having helical cogs which fit both against the
inner circumference of the casing, and into corresponding helical grooves in the
other cylinder, substantially as hercin described.
In witness whereof, I, the said Houry Simon, have hereunto set my hand
and seal, this Twenty-sixth day of October, in the year of our Lord One
thousand eight hundred and seventy-eight,
HENRY SIMON. (L.S.)