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Jan? 7, 1947.
I
v_ E_ SPROUSE
'
ROTARY
ENGINE
' 2,413,796
'
Filed April 2'7, 1945
'
'
'
4 Sheets-Sheet l
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Jan.7,1947.
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'
V_E_S'PROUSE
ROTARYENGINE
' Filed April 27, 1945
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7 2,413,796
"
4 Sheeté-Sheet 2
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Jan. 7, 1947.
v_
SPRQUSE
‘
2,413,796
ROTARY ENGINE
Filed April 27, 1945
- 4 Sheets-Sheet 3
Jan. 7, 1947.,
v. E. SPROUSE
2,413,796
ROTARY ENGINE
‘Filed April 27, 1945
4 Sheets-Sheet 4
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Patented Jan. 7, 1947
2,413,796
UNITED STATES PATENT ()FFI‘CE
‘Y ‘
2,413,796
'
ROTARY ENGINE
Verner E. Sprouse, Columbus, Ind.
Application April 27, 1945, Serial No. 590,585
5 Claims. (01. 253-50)
1
2
This invention relates to a rotary type engine
wherein a gaseous ?uid is applied from a common
are disposed a plurality of what may be termed
expansion cells I5._ The diameter of the rib I4
flow point intermittently around the periphery
is the diameter of the internal opening through
the body Ill. This rib I 4 extends around from
then collected and again applied around an ad 5 the leading edge it of the cell [3 which opens
ditional circumferential length of the periphery
into the annulus, then is carried circumferen
tially around to the exhaust port I ‘I. On the
of the rotor in a di?erent phase relation than
in the ?rst application. The engine might be
other side of the exhaust port ll, continuing cir
termed a multiple expansion rotary engine oper
cumferentially around the body, is a full width
of a rotor for a limited circumferential distance,
ating in a more or lesspositive ‘manner as op
10 curved area 18 which continues on around to the
posed to a simple impingement of fluids against
trailing edge ill of the cell l3, the radius of cur
vature of this area I B being the same as the
A primary object of the invention is to obtain
radius of curvature of the rib I4. The cells l5
are provided in regular manner in the body Ii)
the maximum possible power from a minimum
size unit with a relatively high e?icient use of 15 on each side of the rib M and are aligned one
members on the rotor.
the operating ?uid. A still further important
with the other transversely of the rib [I4 to have
object of the invention is to provide an exceed
the transverse edge portions 20 terminating in
ingly simple structure with but one moving part.
the inner :face of the rib Hi. It is to be noted
that, going in a clockwise direction, Figs. 3, 4,
the rotor.
An advantage arising from the invention is 20 and 6. the cells 15 have ?rst an arcuate portion
entering back into ‘the body I!) and from which
that the rotor may be built in a cast .form rather
portion .the cellis bounded by a substantially ?at
than having to employ inserted buckets or the
area sloping back to the transverse margins 20
like, all to the end that the rotor construction
be exceedingly durable over long periods of usage
the distances between which are equal for all
and under high temperatures.
25 cells i5. The rib l4 forms a boundary wall be
tween :the cells I5 positioned on each side thereof.
These and many other objects and advantages
ESpaced circurnierentially around the body Ill
will become apparent to those versed in the art
in the following description of one particular
on the inner sidethereof, substantially half Way
between the opening from the cell l3 and the ex
form of the invention as illustrated in the accom
panying drawings, in which
haust ‘port I‘! are a pair of what I term booster
Fig. 1 is a view in perspective of one side of the
engine;
'
.
_ Fig. 2. a view in front elevation with a power
drive pulley‘applied;
Fig. 3, a view in side elevation of the engine
and rotor with the power drive face plate re
moved;
'
Fig. 4, a view in perspective of the engine with
the power drive side plate removed and alsov the
rotor removed;
'
Fig. 5, a 'view .in ‘corresponding perspective of
cells 2!, being symmetrically positioned one on
each side of the rib l4. Each cell 2! is approxi
mately symmetrical withthe cell [5. but ismuch
larger inpsizepbeingnot only radially deeper, but
also ‘having alonger circumferential length. The
distance between the terminal edge portions 20
at eachend of the booster cell 2! is greater than
thedistance between those edge portions ofthe
cellxl5. but less than twice that distance.
"Continuing in a clockwise direction from the
transverse edge portions 20 of the booster cells
the rotor;
‘Fig. 6, ‘a view in perspective looking ~from front
2|. thelbody H] is further provided with a plu- v
rality of vexpansion cells 22 regularly spaced on
to rear of the ‘engine body ‘from the power drive
around to the exhaust port I7, and laterally
side thereof {and
alignedlone with another oneach side of the
intervening rib l4. These cells 22 are of the
'
Fig. '7,‘ a' view inperspective ‘of 'therotor viewed
in the same relation as that view of Fig. 6.
same length and ‘of the same con?guration and
Like characters of reference indicate like parts
depthias the cells 5-5. ‘It is to be noted however,
throughout the several views in the drawings.
that'by reason of the spacing of the transverse
I form a body Ill which is essentiallyan‘annu 50 edges of the booster cells'Zl, the transverse edges
Vlus with-a'supporting'base 'll'on its-under side
de?ningthe endsof the cells 22 are out of phase
and with‘an‘extending‘portion 12 at its upper
ine?ect with thespacinglof the transverse edges
side, in whichportion 'l2v'islformed af?uid, receiv
ing cell‘l3.
‘On ‘each ‘ ‘side vof , a centrally _,.dispo_sed -rib l4 55
28 of the cells l5. This willbeiurther explained
hereinafter.
'
Within the body Ill is mountedarotorgener
2,413,796
3
ally designated by the numeral 23. A shaft 24
4
tion as shown in Fig. 3, the transverse edge 29
across the leading end of the cell 2| is then in
is fixed to the rotor to extend from each side
registry with the transverse edge 39 of a rotor
thereof and be carried in suitable bearings
power cell, thereby substantially sealing off fur
mounted in the cover plates 25 and 26, the shaft
having a length to extend through one of the 5 ther ?ow of the ?uid circumferentially around
the rotor 23, and this flow is so stopped by reason
plates at least to have some driving means
of the fact that in that instantaneous position of
mounted thereon, herein shown as the pulley 21,
the rotor 23, the following transverse edges 39 are
Fig. 2.
in substantial registry with the housing edges 29.
The rotor 23 is provided with a central rib 28
to have a diameter which will run in very close 10 However, since a compressible and: expansible
?uid is employed, the out?owing ?uid in the cell
proximity with the face of the rib M of the body
2| will exert a thrust to continue the clockwise
i9, and this rib 28 has a width substantially
matching that of the rib I4 su?icient to retard 1 travel of the rotor 23 by pressure against the end
walls of the rotor cells 29, particularly in respect
to some degree lateral ?ow of ?uids between those
two ribs. On each side of the rib 28, the rotor is 15 to the cell l5 adjacent the leading edge of the
booster cell 2|.
provided with a plurality of what I term power
Then following su?icient travel of the rotor 23
cells 29. These power cells 29 preferably have
to bring a transverse edge 39 into registry with
substantially the same configuration and are of
the trailing edge 29 of the booster cell 2|, a trans
the same sizes of the expansion cells I5 and 22
verse edge 39 will have travelled on beyond and
in thebody l3. These power cells 29 terminate
out of registry with theleading edge 29 of the
with laterally disposed edges 33 on a circumfer
cell 2|, and in like manner all of the subsequent
ence which will carry them across in close prox
cell edges 39 will be out of registry with the sub
imity with the corresponding edges 29 of the body
sequent cell edges 29 around to the exhaust port
cells l5 and 22. In the rotor 23 the power cells
29 on one side of the rib 28 are staggered circum 25 I‘! so that the ?uid shall be free to travel through
ferentially in respect to the cells 29 on the other
its tortuous passageway around the periphery of
the rotor and in and out of the cells of the body
side so that the terminal ends 39 of the cells 29
on the one side will be substantially midway be~
Hi until the ?uid may ?nally escape at a very
V muchly reduced pressure through the exhaust
tween the ends 39 on the other side.
The two side plates 25 and 26 sealably enclose 30 port II. It is to be noted when the escape
through the exhaust port I‘! is permissible, ?ow
the rotor 23 therebetween and within the body
19, some sealing means being provided against
from the cell I3 is arrested by reason of the trail
ing edges 39 of the respective cells 29 being in
radial ?ow of the operating ?uid along the side
faces of the rotor 23 to the shaft 24 so as to . registry with the leading, edges 29 of ,the cells l5
between the cell edge. It andthe trailing edge 29
withhold the operating ?uid from entrance into
the bearings carrying the shaft 24. One such
sealing means may comprise a circular rib 3! car
ried by the cover plate to enter with a running ?t
into a circular groove 32 provided around the ro
tor 23.
of the booster cell 2 l.
.
While this action is going on on the one side
of the transverse ribs 28 and I4, the same action
is going on on the opposite side or those ribs, but
only in a delayed sequence by reason of the stag
Also, these two side plates 25 and 26 enclose
gered arrangement of the cells 29 on the rotor 23.
the admittance cell l3 from each side so that flow
In [other words, when the cell 29, as shown in
Fig. v3, is open to the cell I3 under the edge It,
the corresponding cell on the other side of the rib
therefrom is con?ned to ?ow toward the periph
ery of the rotor 23. A ?uid admittance port is
had through either the body ID or one of the side -
plates 25 and 26 to carry ?uid into the cell I3,
such a port 33 being herein provided, for example,
in the plate 25. A suitable exhaust pipe 34 may
be attached to the engine to conduct exhaust ex
ternally from the port I‘! in any direction as may
be desired.
7
'
In operation the operating ?uid, be it steam,
air or gases of combustion, is admitted into the
cell I3 under pressure. The only escape from
that cell l3 is'toward and against the periphery
28 is substantially sealed off from the cell i3 ‘by
having its trailing edge under and possibly slight
ly toward the leading side of the cell edgev | 6.
Thus it is to be seen that by the unique posi
tioning of one set of expansion cells l5 out of
phase in relation to another subsequent set of cells
IS in relation to the regular spacing of the cells
23 around the rotor 23 permissible by the inter
vening booster cells 2|, an advantage is gained
by preventing a free ?owof the ?uid in its zig
zag passage around the rotor and body to the
of the rotor 23. Due to the con?guration and
exhaust port,‘ and instead of that free ?ow, the
arrangement of the expansion cells l5 and the
flow is interrupted momentarily to permit the uti
power cells 29, the rotor 23 will revolve in a clock
lization of the expansion of the ?uid in two
wise direction in reference to Figs. 3-7. As is
stages.
,
,
indicated in Fig. 3, one of the power cells 29 has
While I have herein shown and described my
60
its trailing portion open to the cell l3.
invention in theme particular form, it is obvious
Therefore, the compressible ?uid then in the
that structural changes may be employed, par
cell l3 may ?ow into that cell 29 which is open
ticularly in the formation, of the rotor and hous
under the transverse leading edge [6. In the
ing elements, all without departing from the spirit
position of the rotor 23 as shown in Fig. 3, the
?uid may ?ow into that ?rst cell 29 under the 65 of the invention, andI therefore do not desire to
be limited to that precise form beyond the lim
edge i6, and thence be directed by reason of the
itations as may be imposed by the following
curved end wall of the cell 29 outwardly and into
claims.
the ?rst expansion cell l5 immediately adjacent
I claim:
the edge It, following which the ?ow may con
tinue from that cell I5 ahead into the next adja 70 1. A rotary engine comprising a body having
a circular chamber therein with an initial set of
cent power cell 23 on the rotor 23, thence out
expansion cells in regular sequence circumferen
wardly into the succeeding expansion cell | 5 and
so on around the rotor 23 until the ?uid escapes
into the booster cell 2|.
.
-
~
With the rotor still in the same. relative posi
tially therearound and radially opening into the
chamber, a second set of expansion cells in regu
75 lar sequence circumferentially therearound fol
2,413,796
6
lowing the said initial set; a rotor mounted in
said chamber and having a plurality of power
cells around and opening radially outwardly from
the rotor periphery; all of said chamber and rotor
cells having equal circumferential lengths be
tween trailing and leading ends thereof; said body
having a booster cell opening radially into said
chamber between said two sets of expansion cells;
around said rotor in alignment with said cham
ber rib to have running clearance therebetween,
dividing the said rotor power cells into two groups,
one of the rotor groups having its cells staggered
circumferentially in respect to those of the other
group.
4. A rotary engine comprising a body having
a circular chamber therein with an initial set
and said two sets of cells having an intervening
of expansion cells in regular sequence circumfer
circumferential space across said booster cell 10 entially therearound and radially opening into
differing by approximately a half circumferen
tial length of one of said expansion cells; said
intervening space being equal to at least one and
one half times said expansion cell length.
2. A rotary engine comprising a body having 15
a circular chamber therein with an initial set of
the chamber, a second set of expansion cells in
‘regular sequence circumferentially therearound
following the said initial set; a rotor mounted in
,said chamber and having a plurality of power cells
around and opening radially outwardly from the
rotor periphery; all of said chamber and rotor
expansion cells in regular sequence circumferen
tially therearound and radially opening into the
cells having equal circumferential lengths be
tween trailing and leading ends thereof; said body
chamber, a second set of expansion cells in regu
having a booster cell opening radially into ‘said
lar sequence circumferentially therearound fol 20 chamber between said two sets of expansion cells;
lowing the said initial set; a rotor mounted in
said chamber and having a plurality of power
and said two sets of cells having an intervening
cells around and opening radially outwardly from
fering by approximately a half circumferential
the rotor periphery; all of said chamber and rotor
length of one of said expansion cells; an annular
circumferential space across said booster cell dif
cells having equal circumferential lengths be 25 rib around said chamber dividing all of said ex-'
tween trailing and leading ends thereof; said
pansion cells into two separate groups, one group
body having a booster cell opening radially into ’ '
on each side of the rib, the cells in both groups
said chamber between said two sets of expansion
being transversely aligned; and an annular rib
cells; and said two sets of cells having an inter’
around said rotor in alignment with said chamber
vening circumferential space across said booster
rib to have running clearance therebetween di
cell differing by approximately a half circum
viding the said rotor power cells into two groups,
ferential length of one of said expansion cells;
one of the rotor groups having its cells staggered
said intervening space being equal to at least one
circumferentially in respect to those of the other
and one half times said expansion cell‘length;
group; said chamber rib also dividing said booster
said booster cell having a Volume equal at least 35 cell into two parts.
that of two of said expansion cells and a circum
5. A rotary engine comprising a body having
ferential length equal to said intervening space.
a cylindrical chamber therein with an initial set
3. A rotary engine comprising a body having
of expansion cells arranged in regular sequence
a circular chamber therein with an initial set of
for a distance therearound, each of said cells
expansion cells in regular sequence circumfer 40 opening through the circumferential wall of
entially therearound and radially opening into the
said chamber, each opening being equally spaced
chamber, a second set of expansion cells in regu
lar sequence circumferentially therearound fol
lowing the said initial set; a rotor mounted in
said chamber and having a ‘plurality of power cells 45
one from the other and of equal circumferential
length;- a booster cell in said body at the end of
said initial set of expansion cells having an open
ing through said wall, the length of which open
ing is greater than that of one of said expansion
rotor periphery; all of said chamber and rotor
cells but less than two lengths thereof; a second
cells having equal circumferential lengths be
set of expansion cells continuing around said
tween trailing and leading ends thereof; said ‘body
body from said booster cell to have openings
having a booster cell opening radially into said 50 through said wall of the same length and same
chamber between said two sets of expansion cells;
spacing apart as that of the cells in said ?rst set;
and said two sets of cells having an intervening
and a, rotor mounted in said chamber to have a
circumferential space across said booster cell
periphery in close running ?t with said chamber
differing by approximately a half circumferential
wall, said rotor having a plurality of power cells
length of one of said expansion cells; an annular 55. therearound each opening outwardly through’
rib around said chamber dividing all of said ex
said periphery by equal opening circumferential
lengths.
pansion cells into two separate groups, one group
on each side of the rib, the cells in both groups
VERNER E. SPROUSE.
being transversely aligned; and an annular rib
around and opening radially outwardly from the
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