AN IMPROVED ROTARY PUMP OR APPARATUS FOR EXHAUSTING OR FORCING PURPOSES
Year: 1884

page_text: I AUGUSTIN FIDDES of Lowin's Moad, Bristol, Gloucester, Engineer do hereby
declare the nature of my said invention for AN IMPROVED ROTARY PUMP OR
APPARATUS FOR EXHAUSTING OR FORCING PURPOSES to be as follows :-
The object of my invention is a special construction or arrangement of apparatus
for exhausting or forcing air, fluids, gases, or liquids or solids in a pulverised or
reduced state or in fine condition such as grain and the like.
For the purpose of my invention I make a cylindrical vessel with two openings
close together and preferably at the upper portion on which a kind of box can be
fitted with apertures for pipe connections.
Between the two apertures in the box I form a chamber in which a plate can
slide, said plate being connected to a strap of the piston which travels round within
the cylinder and in its motion draws or pushes the plate to and fro.
The plate is jointed to the eccentric strap of the piston, but it may be a fixture
to it in which case the plate partakes of an oscillatory yet sliding movement
within spherical bodies arranged in the wall of the cylinder.
The two apertures are for the feed and exit of the body under treatment and the
same apparatus would serve for forcing purpose by simply reversing its direction
of motion or by changing its feed port..
When it is necessary to lift corn or other comparatively light bodies which
can be sucked into the apparatus with say, air, I set the apparatus with its
porta downward the corn then being showered from the outlet in a convenient
receptacle.

page_text: COMPLETE SPECIFICATION.
I AUGUSTIN FIDDES of Lewin's Mead, Bristol, Gloucester Engineer, do hereby
declare the nature of my said invention for:-" AN IMPROVED ROTARY PUMP OR
APPARATUS FOR EXHAUSTING OR FORCING PURPOSES," 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 my invention is a special construction or arrangement of apparatus
for exhausting or forcing air, fluids, gases or liquids or solids in a pulverized or
reduced state or in fine condition such as grain and the like.
For the purpose of iny invention I make a cylindrical vessel with two openings
close together and preferably at the upper- portion on which a kind of box can be
fitted with apertures for pipe connections.
Between the two apertures in the box I form a chamber in which a plate can
slide, said plate being connected to a strap of the piston which travels round within
the cylinder and in its motion draws or pushes the plate to and fro.
The plate is jointed to the excentric strap of the piston, but it may be a fixture
to it in which case the plate partakes of an oscillatory yet sliding movement
between spherical bodies or other antifriction bearings arranged in the top of the
box which forms the upper wall of the cylinder.
The two apertures are for the feed and exit of the body under treatment and
the same apparatus would serve for forcing purposes by simply reversing its
direction of motion or by changing its feed port.
When it is necessary to lift coru or other comparatively light bodies which
can be sucked in to the apparatus with say, air, I set the apparatus with its
ports downward the corn then being showered from the outlet in a convenient
receptacle.
My invention will be clearly understood by reference to the annexed drawings.
Figures 1 and 2 are part sectional elevations of a fan or blower arranged according
to my invention, having 3 drums or pistons, but one or any number of pistons may
be used.
A is a cylinder with covers B B' through the centre of which runs a shaft C.
Upon the shaft C are mounted circular partitions D and excentric drums E forming
pistons, the circular partitions may be loose on the shaft or keyed, or fixed by any
wellknown means, the excentric drums are cylindrical castings of the shape shown
at E Figure 1, and each drum has a boss or enlargement E¹ to be bored for the
reception of the shaft C the said drum E being firmly fixed to the said shaft C by
means of one or more set scrows F or by any other wellknown means Figure 3
represents the shaft C with the two partitions D D and three excentric drums E, E, E,
attached. Each drum is turned on its circumference with a groove E² which
receives a strap G of sheet metal, said strap G being continued as at G¹ to carry a
slide H (see Figure 4). The slide H works in a guide J of sheet metal which
haugs from a shaft K at the top of the port box L. The guide J oscillates between
the two fixed plates of sheet metal M M which form part of the cylinder and

page_text: contain the ports N N¹. At the commencement of each stroke the drum or piston
and the slide plate are nearly in the position shown in broken lines at the right
hand side of Figure 1 and as the excentric drum revolves in the cylinder air or
other substance is drawn in through the port N and forced out through the port N'
in the direction indicated by the arrows until the drum arrives at the end of the
stroke. By using three drums arranged as shown by the broken lines in Figure 1
and as represented at Figure 2, the stream of air &c drawn in and forced from the
cylinder is continuous. Figure 5 is an enlarged view of the slide and its guide.
Figures 6, 7, and 8 represent. in section plan, and elevation an arrangement with
the partitions separating the drums constructed so as not to revolve. In this case
the partitions are fixed to the cylinder and carried upward in one piece to the top P
of the box Q.
Figures 9 and 10 are larger views of the slide in such an arrangement.
When my invention is used for pumping water or liquids the general arrange-
ment and operation is the same as shown and described with respect to the blower,
but the machine is made stronger and the oxcentric straps and slides of thicker
metal and all parts where necessary are packed or otherwise made watertight.
I may when desirable dispense with the shaft K and guides J J and carry the
slide H through the top P of the box Q, metal balls or spheres being arranged
along each side of the aperture through which the slide passes to form a bearing
or guide.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
First. A rotary blower or pump wherein the piston consists of an excentric drum
surrounded by a strap to which is attached an oscillating plate held in
position by a guide fixed in a box at any part of the cylinder, as shown
and described.
Secondly. The improved rotary blower or pump having three excentric drums
affixed to a shaft passing through each of the said drums and through
circular partitions between said drums as described and shown in the
annexed drawings.
Thirdly. In a rotary blower or pump with three drums as herein before described,
the construction of partitions extending to the top of the box and attached
to the cylinder as described and shown.
.. s Tonner100E