Improvements in Apparatus for Exhausting, Blowing, and = Pumping.
Year: 1885

page_text: Improvements in Apparatus for Exhausting, Blowing, and
=
Pumping.
I RICHARD ELIHU DICKINSON 250 Barnsley Road Sheffield in the County of
York Engineer do hereby declare the nature of my said invention for IMPROVE-
MENTS IN APPARATUS FOR EXHAUSTING BLOWING AND PUMPING to be as follows:-
My invention of improvements in apparatus for exhausting, blowing, and
pumping, relates only to rotary machines, and has for its object to simplify the
construction of such apparatus, and to reduce the friction..
=
In carrying out my invention I make an outer casing having a cylindrical top,
and provided with an inlet and an outlet pipe near the bottom of the casing.
I prefer to make this outer casing of three principal parts namely the body, and
the two ends, which are properly prepared, fitted, and secured together.
In the upper part of the casing I place a revolving cylinder, supported by its
shaft or axle passing through both end plates; it is provided with two longitudinal
vanes running the entire length of the cylinder, their outer edges being made to fit
closely to the inside of the upper semicircular portion of the casing, but without
coming in actual contact there with.
The lower part of the casing in. its interior is also made semi-cylindrical so as to
admit a second cylinder also supported in bearings, and having two longitudinal
semi-circular recesses the entire length of the cylinder.
The two cylinders are geared together on the outside of the casing, preferably
by means of a connecting rod, attached to face plates secured upon the projecting
shafts or axles of the cylinders-but I do not bind myself to this method.
The vanes of the upper cylinder when the apparatus is at work-sweep close
to the surface of the semi-circular recesses in the lower cylinder, which is also
revolving the two cylinders being so geared together, that the said recesses will
always be presented to the vanes at the proper moment to enable them to pursue
an uninterupted course.
The lower cylinder fits (without actual contact) closely to the casing, and the
periphery of one cylinder is similarly in close proximity with that of the other, as
are also the ends of the cylinders to the end plates of the casing.
If necessary I insert air checks or adjustable fitting strips at any suitable part or
position of the apparatus.
It will thus be seen from the foregoing description, that whatever the position of
the vanes attached to the upper cylinder, the lower cylinder will practically prevent
any communication between the inlet and the outlet, other than that through
which the stream of air or other fluid or liquid is being forced.
Dated the 30th day of May 1885.
ROBT F. DRURY,
Agent for the Applicant.

page_text: .
Improvements in Apparatus for Exhausting, Blowing, and
Pumping.
I, RICHARD ELIHU DICKINSON 250 Barnsley Road, Sheffield in the County of
York Engineer do hereby declare the nature of my invention for IMPROVEMENTS
IN APPARATUS FOR EXHAUSTING, BLOWING AND PUMPING and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement, that is to say :-
The object of my invention is to obtain à continuous supply of compressed air
by combining within an outer casing A, a revolving cylinder B, having two vanes
"a" and "a" and one revolving double slotted cylinder D, see Fig. 1 of the
accompanying sheet of drawings, so that as the revolving cylinder B, turns in the
direction of the arrow, air will enter the casing at the inlet G, and will be dis-
charged under a pressure depending upon the speed of the cylinder, through the
outlet H, the cylinder D, serving to prevent communication between the inlet and
the outlet under all circumstances, while the slots permit the free rotation of the
vanes.
The chief advantage of my improved blower is its comparative freedom from
the friction and compression which are found in blowers of this class.
And in order that my invention may be clearly understood, I have annexed a
sheet of drawings to which I shall refer, and in which the same letters of reference
indicate similar parts in any of the figures in which they occur.
Figures 1, 2, 3 are transverse sections of the improved blower or apparatus with
its moving parts in various positions.
Fig. 5, is a longitudinal elevation in section.
Fig. 6, is a side elevation of the gearing J.
Fig. 4, is a transverse section of a blower with vanes of a modified form.
The casing A, is composed of two heads b, 61, which are shown in Fig. 5-the
intermediate casing d, and the base e, all properly fitted and secured together.
In Fige 1. 2. 3, the top of the casing is made semi-cylindrical, and concentric.
with the cylinder B. The shaft passes through the head 6, 61, and bearings E, E,
at both ends of the machine, but in Fig. 4, the top of the casing is semi-cylindrical
and concentric with the slotted cylinder D, while the bottom of the machine is
cylindrical and concentric with the cylinder B, the shaft f, passing through the
heads and bearings at both ends of the machine.
The lower portion of the casing Figs 1. 2, 3, is rectangular, but may be of other
suitable form, to contain the slotted cylinder D, each closed end of which fits
closely, but so as to turn freely in a recess h, formed in the inside of the head, see
Fig. 5, the shaft i passes through the head and through a bearing F, attached to
same.
The shafts f, and i, are geared together by wheels J, J, shown in Fig. 6, of equal
diameter.
The Cylinder B, is as close to the cylinder D as is possible without being in
absolute contact, and the outer edges of the vanes while they are not permitted to
touch the upper part of the casing, must revolve in close contiguity with the same;

page_text: this applies also to the ends of the cylinders and the inside of the heads, also to
the cylinders D, with the air checks m, m³,-which extend from end to end of the
casing.
The Cylinder D, being recessed on opposite sides and forming an equal figure of
corresponding area and bulk on both sides, it requires no artificial balancing as do
cylinders having a recess on one side only.
The operation of the machine, as a blower, is clearly illustrated in Figs 1. 2. 3 & 4,
which represent the moving parts in various positions; in Fig. 1, the vane a, is in
the act of forcing compressed air through the outlet H, the air having free access
to the space behind the vane, a', from the inlet G in this position.
The compressed air is prevented escaping through any other course than the
outlet by the close contiguity of the cylinder B, with the cylinder D, and of the
latter with the air checks m.
When the vanes have arrived at the position shown in Fig. 2, the vane a,
will have forced its supply of compressed air through the outlet, and the vane a¹
will have commenced to perform the same duty with another supply, while the
cylinder D, presents one of the curved, recesses to the vane a, permitting it to
pursue its course without actual contact with any part of the said cylinder.
When the vanes have arrived at the position in Fig. 3, the compressed air is in
front of the vanes a & a¹, and is prevented getting back into the inlet chamber by
the interposing cylinder D, which under all circumstances prevents communication
between the inlet and the outlet except through the legitimate channel; the
recesses being always presented to the vanes at the proper time to enable them to
pursue an uninterrupted course.
I am aware the blowing apparatus or machines have been made with revolving
cylinders having vanes and corresponding slots or recesses, such as described in the
Specification of Patent No 4292, 1873. and therefore I do not claim the general
principle of such apparatus, but only the improved construction which constitutes
my invention.
Therefore having now particularly described and ascertained the nature of my
said invention, and in what manner the same is to be performed, and carried into
practice, I declare that what I claim is :-
1. The manufacture of a Blowing Machine constructed and arranged, substan-
tially as herein before described, and as illustrated in Figs 1. 2. 3. 5. & 6 of the
annexed drawings.
2. The construction and arrangement of a blowing, exhausting, or pumping
Machine, comprising a cylinder provided with vanes, and revolving inside a casing,
in combination with a single cylinder revolving at the same speed, and having
grooved recesses on two opposite sides for the purpose specified, and substantially
as described and illustrated.
3. In rotary machines for blowing, exhausting, and pumping, the construction of
the vanes a, a, (with a double face as in Fig. 1, or with a single face as in Fig. 4),
and so curved as to follow out and correspond with the curved face of the grooved
recesses in the cylinder D-for the purpose specified, and substantially as shown.
Dated the 25th day of February 1886.