Improvements in Rotary Blowers or Pumps.
Year: 1894

page_text: Date of Application, 10th Apr., 1894
Complete Specification Left, 24th Dec., 1894-Accepted, 26th Jan.,
1805
PROVISIONAL SPECIFICATION.
Improvements in Rotary Blowers or Pumps.
I, THOMAS WILBRAHAM GREEN, Factory Superintendent, of 2007 East
Alleghany Avenue, Philadelphia, State of Pennsylvania, United States of
America, do hereby declare the nature of this invention to be as follows:
My invention relates to rotary blast blowers or pumps for forcing or exhausting
currents of air, water and similar fluids, and the object is to construct a simple
and effective machine that will do the largest amount of work with the least.
possible expenditure of power.
To accomplish this result I mount upon suitable driving shafts lying in a support
parallel to each other and enclosed in a proper air tight casing, two iron frames
commonly called revolvers. Each of these revolvers is provided with two flat
blades or wings for taking in the air or other fluid, and has the parts lying between
the said wings or blades formed in such shapes that those parts of the two revolvers
will fit into and upon each other as the revolvers turn round, and thus form a lock
or cut off to prevent the escape of the air or water taken in, except by the outlet
provided and in the manner described.
The two wings on each revolver are located exactly opposite to each other
and the cut off mechanism midway between each of said wings. The revolvers
are secured upon their respective driving shafts in such a position that when the
wings of one revolver are in a vertical position the wings of the other revolver
will lie horizontally and exactly at right angles to the first one. This position
will allow the wings to pass each other without striking and the cut off mechanism
of one revolver to act in conjunction with the similar parts on the other revolver
and thus form a complete lock or cut off. The exact relative position of each
revolver is positively maintained by means of two gear wheels secured upon the
ends of the respective driving shafts. The revolvers have solid heads made
integral with the other portions of same, and have therein a recessed portion for
the reception of any material necessary to secure a proper balance of the parts,
and also have a wide face formed on their outer circumference. These faces are
turned to a circle the diameter of which is the distance between the centres of the
two driving shafts. The locking or cut off mechanism consists of four short
segmental extensions formed on each of the revolvers, and four other and larger or
long segmental extensions formed on each of the revolvers; the short parts on one
revolver work in conjunction with the long parts on the other revolver, and
together they form the complete cut off.
The outer surfaces of the short extensions are segments of a circle, the centre of
which is the centre of the driving shaft, the diameter of said circle being the
distance between the centres of the driving shafts. The outer surfaces of the long
extensions are segments of a circle, the radius of which is the distance in. a straight
line from the middle part of one of the wings or blades to the nearest point of one
of the short extensions, the measurement being taken from a point at the base of
one of the wings or blades where the circle forming the short extensions would
touch the. said blade. The centre of these circles would be located on the
circumference of the circle forming the short extensions or segments midway
between the two blades. When the short and long extensions are formed to circles
of correct diameters the short extensions on one revolver will meet the long
extension on the opposite revolver and follow along on the upper surface thereof

page_text: until the short extensions meet, after which the parts begin to separate as the
revolvers turn around; before complete separation of these parts takes place
however, the similar parts immediately following begin to operate, consequently
there is maintained at all times a complete cut off or lock thus preventing the
backward flow of the fluid acted upon.
The revolvers are placed in the supports so that the wide faces of the heads
before referred to just touch each other, thus forming an aid or auxiliary to the
gear wheels should any break occur therein.
Dated the 10th day of April 1894.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Chartered Patent Agent,
For the Applicant.
:
:
:
I THOMAS WILBRAHAM GREEN, Factory Superintendent of 2007 East
Alleghany Avenue Philadelphia, State of Pennsylvania United States of
America 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 :-
My invention relates to rotary blast blowers or pumps for forcing or exhausting
currents of air, water and similar fluids, and the object is to construct a simple
and effective machine that will do the largest amount of work with the least
possible expenditure of power.
To accomplish this result I mount upon suitable driving shafts, lying in a
support parallel to each other and enclosed in a proper air tight casing, two iron
frames commonly called revolvers. Each of these revolvers is provided with two
blades or wings for taking in the air or other fluid, and has the parts lying between
the said wings or blades formed in such shapes that those parts of the two revolvers
will fit into and upon each other as the revolvers turn around and thus form a lock
or cut off to prevent the escape of the air or water taken in, except by the outlet
provided and in the manner described.
The two wings on each revolver are located exactly opposite to each other and
the cut off mechanism midway between each of said wings. The revolvers are
secured upon their respective driving shafts in such a position that when the wings
of one revolver are in a vertical position, the wings of the other revolver will lie
horizontally and exactly at right angles to the first one. This position will allow
the wings to pass each other without striking and the cut off mechanism of one
revolver to act in conjunction with the similar parts on the other revolver
and thus forming a complete lock or cut off. The exact relative position of each
revolver is positively maintained by means of two gear wheels secured upon the
ends of the respective driving shafts.
In the accompanying drawing
Figure 1, is an end elevation of my improved blower showing the driving pulleys
and gear wheels.
Fig. 2, is a cross section of the blower.
Fig. 3, is a front elevation, Fig. 4, is a longitudinal vertical section through
one of the revolvers and its driving shaft.
Fig. 5, is a cross section of one of the revolvers removed from the driving shaft.
Fig. 6, is a longitudinal vertical section of one of the revolvers through the
wings and end heads.
A, represents the base or bed plate of the blower. B, B, are the end castings
forming the supports for the driving shafts and the operating parts of the machine,
1

page_text: hese end supports are cast with a recessed portion B. C, is the external casing
olted upon the end supports and surrounding the revolvers. D, D, are two
riving shafts extending through the blower and projecting some distance beyond
ach of the end supports. E, E, are the revolvers on the shafts D, D. E¹, E, are
olid heads on the ends of the revolvers, these heads are made integral with the
ther portions of the revolvers and have therein a recessed portion, e, for the
eception of any material necessary to secure a proper balance of the parts. e', is
wide face formed on the outer circumference of the heads E¹. These faces are
bout two and one half inches wide and are turned to a circle the diameter of which
s the distance between the centers of the two driving shafts D, D. a, a, are flat
wings or blades on the revolvers each revolver is provided with two of these
wings secured thereon in the position shown in Figures 2, 5 and 6, and they may be
made integral therewith or made in separate pieces and bolted or riveted
on. b, b, b, b, are four short segmental extensions formed on each of the revolvers,
c, c, c, c, are four other and larger
at the points shown in Figures 2 and 5.
segmental extensions formed on each of the revolvers, the parts b, on one revolver
work in conjunction with the parts c, on the other revolver and together they form
the complete cut off. F, F, are driving pulleys secured to the driving shafts D.
G, is the driving belt connected with a motive power. H, H, are gear wheels
secured on the ends of the driving shafts outside of the casing C. These gear
wheels are for the purpose of giving a positively uniform motion to the two
shafts D, D, any slipping of the driving belt being corrected thereby and a
variation of speed made impossible. d, is a belt tightening idler pulley secured
to the frame. a', is the intake for the air or water, 6', is the outlet or discharge.
The outer surfaces of the short extensions b, b, are segments of a circle the center
of which is the center of the driving shaft, the diameter of said circle being the
distance between the centers of the driving shafts D, D. The outer surfaces of
the long extensions c, c, are segments of a circle the radius of which is the distance
in a straight line from the middle part of one of the blades a, to the nearest point
of one of the short extensions b, the measurement being taken from a point
at the base of the blade a, where the circle forming the extensions b, would
The centers of these circles would be located on the
touch the said blade.
circumference of the circle forming the seginents b, midway between the two
blades a, a.
When the extensions b, and c, are formed to circles of correct
diameters, the short extensions b, on one revolver will meet the long extension c,
on the opposite revolver and follow along on the upper surface thereof until the
short extensions meet, after which the parts b, and c, begin to separate as the
revolvers turn around; before complete separation of these parts takes place
however, the similar parts immediately following begin to operate, consequently
there is maintained at all times a complete cut off or lock thus preventing the
backward flow of the fluid acted upon. The revolvers are placed in the supports
so that the faces e¹, e¹, of the heads E', E', just touch each other, thus forming
The
an aid or auxiliary to the gear wheels should any break occur therein.
heads E', being made integral with the other or middle portions, the whole revolver
is thus made much stronger.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is.
1. In a rotary blower exhaust or pump, the combination of the two revolvers E,
0 of same shape and size, mounted in a frame and surrounded by an air tight casing,
each of said revolvers being provided with the two flat blades or wings located
opposite to each other and having the parts lying between the wings cut away to
allow the said wings to pass, the cut away parts being shaped so that they form a
cut off valve as the parts meet when the revolvers turn around, substantially as
35 shown and described.
2. In a rotary blower exhaust or pump the combination of two revolvers

page_text: surrounded by an outer casing, each revolver having thereon two flat blades or
wings, and between the two wings provided with the segmental extensions b, and c,
the extensions b, being formed to a circle the diameter of which is the distance
between the centers of the driving shafts of said revolvers and the outer surface of
the segmental extension c, being formed to a circle that will conform to the forward
end of the extension b, and cooperate therewith to form a cut off, as the revolvers
turn around, substantially as shown and for the purpose described.
5 3. In a rotary blower exhaust or pump, the combination of the two
revolvers E, E, having the solid heads E¹, E', integral with the middle portions
thereof, said middle portions being provided with two flat blades or wings and
between the wings having cut away portions provided with short segmental
extensions b, b, and the longer segmental extensions c, substantially as and for
the purpose described.
4. In a rotary blower exhaust or pump, the combination of the two
revolvers E, E, having the solid heads E¹, E, provided with the circular
faces e, said faces working together in pairs and touching each other, the middle
portion of each of the revolvers being provided with two flat blades or wings and
between said wings having the short segmental extensions b, and the long segmental
extensions 6, all arranged substantially as and for the purpose described.
5. In a rotary blower exhaust or pump, the combination of the two
revolvers E, E, both of said revolvers having on the ends thereof, the solid
heads E, E, made integral therewith, and between the solid heads provided with
wings or blades, substantially as shown.
Dated the 24th day of December 1894.
PHILIP M. JUSTICE,
Chartered Patent Agent, London,
For the Applicant..