IMPROVEMENTS IN APPARATUS FOR RAISING OR FORCING FLUIDS
Year: 1876

page_text: LETTERS PATENT to Wilhelm Weyhe, of Bremen, in the German Empire, for
the Invention of IMPROVEMENTS IN APPARATUS FOR RAISING OR FORCING
FLUIDS."
Sealed the 7th July 1870, and dated the 1st February 1870.
PROVISIONAL SPECIFICATION left by the said Wilhelm Weyhe at the Office
of the Commissioners of Patents on the 1st February 1876.
WILHELM WEYHE, of Bremen, in the German Empire.
APPARATUS FOR RAISING OR FORCING FLUIDS."
"IMPROVEMENTS IN
My Inventon relates to an improved construction of apparatus for raising or
forcing fluids, wherein a piston receiving both longitudinal and rotary motion in a
closed cylinder is so arranged that while it draws fluid into and expels it out of the
cylinder, it at the same time effects the alternate opening and closing of the inlet
and outlet ports without the use of valves. For this purpose the piston has formed
round its periphery an oblique groove, into which fits a roller projection from a
recess in the side of the cylinder. The piston rod is provided outside the cylinder
with a crank or pulley by which rotary motion is imparted thereto, and as the
piston is made to revolve the effect of the roller fitting in the oblique groove will
be to cause the piston to move backwards and forwards in the cylinder so as
alternately to draw fluid into and expel it from the cylinder on each side of the
piston. The cylinder is provided at some distance from each end with two opposite
ports, one for inlet and one for outlet of fluid, and the piston has formed upon
it on each side a projection or shield fitting against the side of the cylinder, and
extending so much beyond the semicircle that in a certain position it just covers
both the inlet port and the outlet port, the two shields being in opposite positions
on each side of the piston and so arranged that they each close their respective
ports in one and the same position of the piston, namely when this is at either end
stroke. Assuming now that the piston is at the end of one of its strokes, it will by its
continued rotation be made to commence its return stroke, while at the same time
its one shield in revolving with it will begin to uncover the inlet port on the one
side, and the other shield will begin to uncover the outlet port on the other side,
and the ports will continue open until the piston has performed half a revolution
Duins (71

page_text: and at the same time arrived at the end of its stroke, by which time the shields
will have again closed the said ports and will now commence to open the other inlet
and outlet ports as the piston begins its next stroke. When the apparatus is
constructed of large dimensions I prefer to assist the action of the roller and
oblique groove in imparting the requisite longitudinal motion to the piston by
connecting the piston to the one end of the cylinder by means of a link situated to
one side of the axis of the cylinder, so that when the piston is turned from the
position in which the link is parallel to the axis into that in which the link must
assume an oblique position the effect will be that the link will draw the piston
towards its end of the cylinder, while as by the continued rotation of the piston
the link moves from the oblique into the parallel position again it will push the
piston towards the other end of the cylinder.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Wilhelm Weyhe in the Great Seal Patent Office on the 27th July
1876.
WILHELM WEYHE, of Bremen, in the German Empire.
APPARATUS FOR RAISING OR FORCING FLUIDS?
"
IMPROVEMENTS IN
My Invention relates to an improved construction of apparatus for raising or
forcing fluids, wherein a piston receiving both longitudinal and rotary motion in a
closed cylinder is so arranged that while it draws fluid into and expels it out of the
cylinder it at the same time effects the alternate opening and closing of the inlet
and outlet ports without the use of valves. For this purpose the piston has formed
round its periphery an oblique groove, into which fits a roller projecting from a
recess in the side of the cylinder. The piston rod is provided outside the cylinder
with a crank or pulley, by which rotary motion is imparted thereto, and as the
piston is made to revolve the effect of the roller fitting in the oblique groove will
be to, cause the piston to move backwards and forwards in the cylinder, so as
alternately to draw fluid into and expel it from the cylinder on each side of the
piston. The cylinder is provided at some distance from each end with two opposite
ports, one for inlet and one for outlet of fluid, and the piston has formed upon
it on each side a projection or shield fitting against the side of the cylinder, and
extending so much beyond the semicircle that in a certain position it just covers
both the inlet port and the outlet port, the two shields being in opposite positions
on cach side of the piston and so arranged that they each close their respective
ports in one and the same position of the piston, namely when this is at either end
stroke. Assuming now that the piston is at the end of one of its strokes it will
by its continued rotation be made to commence its return stroke, while at the
same time its one shield in revolving with it will begin to uncover the inlet port on
the one side, and the other shield will begin to uncover the outlet port on the other
side, and the ports will continue open until the piston has performed half a
revolution and at the same time arrived at the end of its stroke, by which time
the shields will have again closed the said ports and will now commence to open.
the other inlet and outlet ports as the piston begins its next stroke. When the
apparatus is constructed of large dimensions I prefer to assist the action of the
roller and oblique groove in imparting the requisite longitudinal motion to the
piston by connecting the piston to the one end of the cylinder by means of a link
situated to one side of the axis of the cylinder, so that when the piston is turned
from the position in which the link is parallel to the axis into that in which the
link must assume an oblique position the effect will be that the link will draw the
piston towards its end of the cylinder, while as by the continued rotation of the
piston the link moves from the oblique into the parallel position again it will push
the piston towards the other end of the cylinder.

page_text: DESCRIPTION OF THE DRAWINGS.
Figs. 1 and 2 represent longitudinal sections of apparatus according to my
Invention, shewing respectively the piston at the two extremes of its stroke ;
Fig. 3 is a transverse section through the inlet and outlet ports near one end of
the cylinder; Fig. 4 is a plan of the apparatus; and Fig. 5 is a side view of the
piston.
The piston A having in its periphery an oblique groove a is fixed on the spindle B,
which can be rotated by hand or other convenient power. A roller C mounted on
a stud c at one side of the cylinder D enters the oblique groove a and bearing
against its sides causes the piston to travel to and fro in the cylinder while it
revolves therein. Inlet and outlet ports E and F, facing each other, are provided
near each end of the cylinder D, and the piston A has at each end of it a projecting
annular segment or shield G, extending sufficiently far round the interior of the
cylinder to cover both of the opposite ports at the same time when the piston
is in either of its extreme positions. On causing the piston to rotate, whereby it
is also caused through the action of the roller C on the oblique groove a to move
longitudinally, the shield G at the one end of the piston uncovers one of the two
ports there, as for example the inlet port, and the corresponding shield at the other
end of the piston uncovers the opposite or outlet port. Fluid is consequently
drawn in at the former and expelled through the latter until the piston has attained
the opposite extreme of its stroke. In this position the four ports are again closed,
but as the piston continues its rotation the opposite ports are in each case uncovered
and the fluid enters and leaves the cylinder at the ends respectively opposite to
those at which it entered and left in the preceding stroke. Thus without the use of
valves the apparatus operates as a double-acting pump, alternately drawing in and
forcing out fluid at both ends of the cylinder. The compound movement of the
piston, namely that of rotation combined with reciprocating longitudinal motion,
inay be effected by arrangements somewhat different from that of the groove and
roller outside the cylinder, as shewn in Fig. 6, or inside the cylinder, as shewn in
Fig. 7. Referring to Fig. 6, an oblique disc H is fixed on the piston rod with its
edge inserted between two rollers I, I, so that as the piston rod, piston, and disc,
are caused to rotate, the disc turning between the two rollers is by its obliquity
caused to move to and fro longitudinally, moving the rod and piston with it. In
Fig. 7 the movement is effected by the use of a radius K jointed by ball-and-socket
joints at one end to the cylinder bottom near the circumference, and at the other
end to the piston near its circumference. The piston in revolving causes the
radius K to sweep round in a conical path from a position parallel to the axis of
the cylinder or nearly so to its position of greatest obliquity, as shewn by the
dotted lines, thereby causing the piston to reciprocate longitudinally. The oblique
radius K may be arranged outside the cylinder, jointing its one end to the fixed
framing and its other end to an arm fixed on the end of the piston rod. It may
also be employed either inside or outside the cylinder in conjunction with the
oblique groove a, shewn in Figs. 1 to 5, or when either the radius K or the oblique
disc H shewn in Fig. 6 are used the oblique groove a in the piston may be
dispensed with.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I claim,—
First. The use for raising or forcing fluids of apparatus wherein a piston caused
to rotate and also to reciprocate within a cylinder is made by means of shields or
annular segments at each of its ends to close and unclose alternately and reciprocally
inlet and outlet ports without the aid of valves, substantially as herein described.
Second. Constructing a piston with annular segments or shields operating sub-
stantially as and for the purpose herein set forth.
Third. The use for imparting reciprocating longitudinal motion to a rotating
5 piston of a roller or stud working in an oblique groove, substantially as herein
described.

page_text: Fourth. The use for imparting reciprocating longitudinal motion to a rotating
piston of a radius mounted eccentrically relatively to the axis of rotation, sub-
stantially as described with reference to Fig. 7 of the accompanying Drawings.
In witness whereof, I, the said Wilhelm Weyhe, have hereunto set my hand
and seal, this Twenty-third day of July, in the year of our Lord One
thousand eight hundred and seventy-six.
W. WEYHE. (L.S.)