A New or Improved Rotary Engine, applicable also as a Pump.
Year: 1897

page_text: Date of Application, 3rd Aug., 1897-Accepted, 2nd Oct., 1897
COMPLETE SPECIFICATION.
A New or Improved Rotary Engine, applicable also as a Pump.
I OTTOMAR PODLEYSCHJ, of 786 Smichov Prague, Bohemia, Engineer, do hereby
declare the nature of my said 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 that class of rotary engines and pumps in which two
or more segmental pistons are caused to rotate in a cylinder at varying angular
velocities, the faces of the pistons alternatively approaching towards and receding
from each other.
According to my invention I effect these movements of the pistons by mounting
two or more segmental pistons upon concentric shafts, longitudinally arranged in
the working cylinder, the shafts being fitted with cranks which are connected by
means of drag links or the like with cranks fast upon another shaft parallel,
but not in alignment with the piston shafts, the latter shaft being caused to rotate
at an approximately uniform angular velocity.
And in order that my said invention may be particularly described and ascer-
tained reference is hereby made to the accompanying drawings, in which similar
figures of reference indicate corresponding parts.
Fig. 1 is a longitudinal Sectional elevation of my invention, fitted with two
segmental pistons.
Fig. 2 is an end view on the line Z¹ Z¹ of Fig. 1.
Fig. 3 is a section on the line Z Z of Fig. 1.
Fig. 4 is a perspective view of a packing ring between the two segmental
pistons.
Fig. 5 is a sectional elevation of the invention fitted with four segmental
pistons.
Fig. 6 is a section on the line X X of Fig. 5.
Fig. 7 is a section on the line Y Y of Fig. 5.
Fig. 8 is a front view and Fig. 9 a side view of one pair of pistons shown in
section in Fig. 7 and Figs. 10 and 11 are similar views of the other pair of
pistons shown in Fig. 7.
Fig. 12 is a diagram illustrating the principle upon which the invention is
constructed.
Referring to Figs. 1 to 4, 1 is a short axle mounted in bearings 21 carrying
crank arms 13 and 14 fast thereon at 180° apart and crank pins 3 and 4 to which
drag links or connecting rods 11 and 12 are fitted. 22 is a pulley for receiving
or transmitting power for which purposes any other ordinary and well known
means may be substituted for the rigger 22. 8 is the central shaft of the engine
to which the segmental piston 15 is made fast and 16 is another segmental
piston, fast on the tubular axle 7. 23 being a bearing for the same. The axle 7
is fitted with a crank arm 9 and crank pin 5 linked to the rod 11 and the axle 8
is fitted with a crank arm 10 and crank pin 6 linked to the rod 12. 17 is the
cylinder in which the pistons rotate. 26 is the cylinder cover, fitted with a
stuffing box 27. 24 is the corresponding stuffing box at the other end of the
cylinder. 29 is a packing ring which assists in rendering fluid tight the space
between the pistons 15 and 16. The ring 29 is forced to rotate with the piston 15
by means of the shoulders 30 and 31 (Fig. 4). A spiral spring 32 presses the
[Price 8d.]

page_text: ring 29 against the piston 16. The bosses of the pistons 15 & 16 are each of
half the length of the cylinder, each piston working to and fro upon the boss of
the other and rotating therewith. 33, 34 and 35 are packing pieces for rendering
the pistons fiuid tight. 18 is the induction port and 19 the eduction port. 25 is
the lower part of the casting.
Referring to Figs. 6 to 11, my invention. with four pistons is shown. The
boss 40 is integral with the tubular 'shaft 7 and carries the segmental pistons 36
and 37. The boss 41 is fast on the inner shaft 8 and carries the two pistons 38
and 39. 54, 55, 56, and 57, are four segmental spaces which are constantly
enlarged, and, reduced by, the motions of the, pistons, as herein before described, 1
the spaces 54 and 55 are simultaneously enlarged and reduced by induction and
eduction fluids under pressure, or for the purpose of receiving and discharging
fluids when acting as a pump, and the spaces 56 and 57 act in like manner. The
spaces 56 and 57 communicate with each other by the passage 46 formed in the
boss 40, which passage: during half a revolution is open through the port 47 to
the passage 48 and, during the other half of a revolution, to the passage 50.. In
like manner the spaces 54 and 55 communicate with each other by a passage in
the boss 41, which opens during half a revolution into the passage 52,, and during
the other half of a revolution through the port 45 into the passage 53. 42 is the
cylinder: 43, 44, the outer casing: 49 the upper passage and 51 the lower 2
passage.
:
On reference to Fig. 12 the relative variations in the motions of the pistons
will be readily understood, assuming that the axle 1 with its gear revolves at
uniform angular velocity.
.
"
By enlarging or reducing the area of the ports, expansion or compression of
steam or other fluid may be provided for.
1
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I wish it to be understood
that I am aware that rotary engines have previously been made with 'segmental
pistons, and therefore I do not claim the use of such engines, broadly, but what I
claim as my invention and desire to secure by Letters Patent is: -
1. In a rotary engine, the combination of two concentrix Shafts 7 and 8 carrying
segmental pistons 15 16 in a cylinder 17 in such a manner that each piston fills
a portion of the annular space and the positions of the pistons are governed by
their respective cranks 9 and 10, linked to cranks 13, 14 fast on a shaft 1" at 180°
apart substantially as and for the purposes hereinbefore described and illustrated
by Figs. 1, 2, 3, and 4 of the drawings.
2. In a rotary engine with two concentric shafts and a parallel shaft 1" out of
alignment therewith carrying cranks at 180° apart as aforesaid, the combination
therewith of four or more segmental pistons 36, 37, 38, and 39, in a cylinder 42,
each of the pistons filling up a portion of the annular space, and the positions of
the pistons being governed by their respective cranks 9 and 10 linked to cranks 13
and 14. fast on a shaft 1 at 180° apart substantially as and for the purposes
herein before described and 'illustrated by Figs. 5 to 11 of the drawings.
3. The general constructions, arrangements and combinations of the several
and respective parts, together constituting my invention of a new or improved
rotary engine applicable also as a pump substantially as specified.
GEORGE DOWNING & SONS,
8 Quality Court, London, W.C., Agents.