Improvements in Apparatus for Blowing, Exhausting, and Pumping.
Year: 1886

page_text: Date of Application, 12th Oct., 1886.
Complete Left, 5th July, 1887.
Complete Accepted, 5th Aug., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Blowing, Exhausting, and
Pumping.
We, FREDERICK HARVARD STACEY, Heeley Bridge Foundry Manufacturer, and
HENRY WILKINSON, Petre Street Engineer, both of Sheffield in the County of York
do hereby declare the nature of our said invention for IMPROVEMENTS IN APPARATUS
FOR BLOWING, EXHAUSTING, AND PUMPING to be as follows:-
--
The object of this invention is to simplify the construction of rotary blowers and
thereby to reduce the cost of manufacture.
In carrying out our invention in the construction and manufacture of a blower for
example, being as is now well understood, an apparatus to discharge a continuous
stream of air under pressure, for blowing smiths fires, furnaces and other similar
purposes, we prepare an outer cylindrical casing having an air inlet on one side and
an outlet on the opposite side; it is advisable to bolt the casing upon a strong base.
Passing longitudinally through the centre of the casing, and the end plates or
covers, is the driving shaft, supporting inside the casing a cylinder corresponding with
the length of the outer casing, and carrying two projecting vanes of similar length
which sweeps the inside surface of the casing without being in actual contact. The
inside surface of casing, the outer surface of the cylinder on the shaft and the edges
of the vanes, are machined true.
Below and immediately under the cylinder before mentioned we fix a lower or
"bottom cylinder" capable of revolving upon fixed (but adjustable) bearings, and so
that its finished or surfaced periphery shall in revolving always be in close contiguity
with but not touching the periphery of the top cylinder from end to end.
The shafts of the two cylinders are connected by geared wheels that upon the top
cylinder shaft being twice the diameter of the lower one, it follows that the bottom
cylinder will revolve twice to the top cylinder once; the driving pulley is preferably
fixed on the top shaft.

page_text: To receive the bottom cylinder, we make a semicircular chamber either in the
bottom of the casing or in the base plate; we find the latter the most convenient, and
we therefore leave an opening in the bottom of the casing corresponding with the top
opening of the semicircular chamber in the base plate. It is not necessary to
machine surface the interior of the said chamber, but air stops or check-strips placed
in suitable positions.
The bottom cylinder provided with a longitudinal opening in its periphery for
the entrance of the vanes before mentioned as being fixed upon the top cylinder, and
to permit their free exit as the two cylinders revolve.
We fix down the centre or interior of the bottom cylinder, a curved plate, in such
a manner that it shall not revolve with the cylinder but remain stationary. The
greater portion of its upper face is curved, so as to correspond with and represent a
portion of the interior surface of the cylindrical casing, and against this curved
portion, the vanes sweep (but not in actual contact) as they pass through the chamber
in the bottom cylinder. The edges of the plate are in close contiguity with the inside
surface of the cylinder.
By this arrangement of the various parts of the before described apparatus it will
be seen that each vane after passing the outlet will enter the opening in the bottom
cylinder sweep across the surface of the plate, and leave the opening when (but not
before) the surface of the bottom cylinder is in working contact with that of the top
cylinder.
Thus communication is prevented between the inlet and the outlet except through
the legitimate channel, while at the same time an unimpeded course is provided for the
passage of the vanes.
ROBT. F. DRURY,
Agent for the Applicants.

page_text: Improvements in Apparatus for Blowing, Exhausting, and
Pumping.
We FREDERICK HARVARD STACEY Heeley Bridge Foundry, Manufacturer, and
HENRY WILKINSON, Petre Street, Engineer, both of Sheffield in the County of
York, 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 :-
The object of this invention is to simplify the construction of rotary blowers, and
thereby to reduce the cost of manufacture.
The annexed sheets of drawings fully illustrate our invention, and the same letters
of reference indicate the same parts in either of the figures.
Fig. 1, is a sectional elevation of a blowing Apparatus made according to this
invention.
Fig. 2, is a cross section of same.
In carrying out our invention in the construction of a Blowing Apparatus such as
is illustrated in the annexed sheet of drawings, and which as is well understood is an
apparatus for discharging a continuous stream of air under pressure, and used for
blowing furnaces, smiths fires and other like purposes, we prepare an outer cylindrical
casing A, having an air inlet B, on one side, and an outlet (), on the opposite side ;
and it is advisable to bolt such casing upon a strong base D.
The driving shaft E, passes longitudinally through the centre of the casing A, and
the covers or end plates F, F, and supports inside the casing, a cylinder G, which
corresponds with the length of the outer casing A, and carries two projecting
vanes H, H, of similar length, and which are fitted to sweep the inside surface of
the casing A, without being in actual contact therewith, the edge of the vanes, and
the inside of casing, and outside of cylinder are machined true. Below and im-
mediately under the cylinder G. before mentioned we fix a lower or bottom cylinder
or partial cylinder I, capable of revolving upon adjustable bearings, and so arranged
that its surfaced or trued periphery, shall in revolving always be in close contiguity
with, but not absolutely in contact with the periphery of the top cylinder G, from
end to end, except when an opening J herafter mentioned, and formed in the lower
cylinder I, is brought to the top side, during its revolution.
The Shafts of the two cylinders G, and I, are connected by geared wheels K,
and L; that upon the top cylinder G, being twice the diameter of the lower one, it
therefore follows that the bottom cylinder I, will revolve twice, to the top cylinder
once.
We preferably fix the driving pulley M, on the shaft E of the top cylinder G.
To make the Apparatus compact, and to carry out the invention, we make a semi-
circular well or chamber N, to receive the hottom cylinder I; it may be made either
in the bottom of the casing, or in the base plate, but we find the latter plan most

page_text: convenient, and we therefore leave an opening in the bottom of the casing A,
corresponding with the opening of the semicircular well or chamber N, in the base
plate D. It is not necessary to machine a surface the interior of the well or
chamber N, but air stops or check strips P, should be placed in suitable positions to
prevent the passage of air.
The bottom cylinder is provided with an opening J, made through the periphery,
and extending longitudinally from end to end, to admit the vanes H, H, during their
revolution with the cylinder G, and to allow of their free passage and exit.
Through the interior of the bottom cylinder I, we fix a plate Q, secured to the side
plates R in such a manner that it is held stationary inside the revolving cylinder.
The greater part of its upper face is curved and machine surfaced so as to correspond
with and represent a continuance of the inner surface of the outer cylindrical
casing A, the vanes H, H, sweeping its surfaces in the manner before described, as
they pass through the opening J. The edges of the plate are in close contiguity with
the inside surface of the cylinder through which it passes.
It will therefore be seen that by the before described arrangement of the various
parts of the Apparatus, when it is set in motion, each vane H, will after passing the
outlet C, enter the opening in the bottom cylinder, sweep across the curved face of
the plate Q, and leave the opening at the same moment that the surface of the cylinder
comes into working contact with that of the top cylinder, and thus communication is
prevented between the inlet and the outlet except through the legitimate course, while
at the same time an unimpeded course is provided for the passage of the propelling
vanes to force the air from the inlet to the outlet in continuous revolutions.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :-
1. An Apparatus for blowing, exhausting, or pumping constructed as hereinbefore
described and as illustrated.
2. In Apparatus for blowing, exhausting or pumping, the combination with a
cylinder provided with propelling vanes, of a cylinder having a longitudinal opening
to receive the said vanes, and a fixed plate having a curved face, for the purpose
specified and substantially as hereinbefore described and illustrated.
ROBT. F. DRURY,
Agent for the Applicants.