US655201A - Rotary engine. - Google Patents

Description

No. 655,2ol. I Patented Aug. 7, |900.

L. A. PER.

ROTAR NGINE.

5 Sheets-Sheet 2 No.` 655,2ol Patented Aug. 7, |900.

L. A. cooPER.

ROTARY ENGINE.

(Applicatiun mea occ. 27, Isae.) (lo Model.) ,5 Sheets-Sheet 3.

Illy. 6.'

No. 655,2m. Patented Aug. 7,1900.

L. A. CDDP-ER. noTAnY ENGINE..

- (Application led Oct. 27, 1899.) (N0 MNM.) 5 Sheets-Sheet 4.

Patented Aug. 7, leon.'-

.Fm R Em. PG

N ME CY .R AA

(Application led Oct. 27, 188%) (lo Modal.) l Y 5 Sheets-Sheet 5.

-Uivirnn STATES 'PATENT FFIC;

LnS'Li A. coorER, orSPRiNeFiELD, MASSACHUSETTS, ASsieNoa or oun- THIRD TO ALVAH H. SABIN, OF NEW YORK, N. Y.

Ro'rARY ENGN;

SPECIFICATION forming part or Letters raf-.ent No. 655,201, dats August 7, 1906.

Application tiled October 27, 1899. Serial No. 734,902. (No model.) Y

va resident ofA Springfield, inthe county o'f ampden and State of Massachusetts, have invented certain new and useful Improvements in Rotary Engines, of which" the following is a full, clear, and exact description.

This invention relates to improvements in rotary engines and rotary compressors for air or other elastic fluids and principally, although not in all respects, to compound concentric-piston rotary engines.

The main object of the invention is to devise an engine of the class mentioned which will be composed of a minimum number of simple and comparatively-cheap and easilyconstructed parts, that will be very durable and capable of being run a long time with the avoidance of any considerable or detrimental Wear or deterioration, and whichabove all will serve to utilize the steam economically and at the same time acquire a very high efficiency.

Another object of the invention is to so construct the engine, especially as regards the rotary pistons and abutinents thereof, as to avoid all disadvantageous effects `of expansion of the rotary pistons and abutments longitudinally, whereby these parts-might bind or become cramped in the engine-case.

Another object of the invention is to provide means to reinforce the intermediate portion ofthe shaft or arbor on which the rotary abutments are carried, so that the tendency of the steam employed within the engine to deflect the abutment-shaft at its middle portion may not result in a hard running of the engine and in undue wearing of the running parts. t

The invention consists in a steam-engine having the parts composing it or employed-in conjunction therewith constructed and combined or arranged substantially as hereinafter described, and setforth in the claims.

'Reference is to be had to the accompanying drawings, Vin which my invention is exempliiied in the forin of a"4 novel triple-expansion engine, and in whichM Figure 1 is substantially a central longitudinal sectional View through the engine case and bearings for the rotary piston-shaft and the shaft of the Vrotary abutineiits, the said shafts and the parts carried thereby being seen in side elevation. Fig. 2 is a vertical cross-sectional view asV taken on the line 2 2,

Fig. 1, looking in the direction of the arrow. Fig. 3 is a vertical cross-sectional view of the engine as taken on the line 3 3, Fig. 1, which intersects one of the rotary and one of the non-rotating partitions separating 'the rst steam-chamber from the next. Fig.A 4 is a view somewhat similar to Fig. 3, bu't taken' on the line 4 4, Fig. 1. Fig. 5 is a longitudinal vertical section of the engine-case minus the end, heads and with all the internal parts removed, as taken on the plane indicated by the line wx, viewed-in the direction of the arrow 5. Fig. 6 is a sectional view similar' to Fig. 5, but comprising only the upper portion of the engine-case, as seen in vertical section on the same line ai w, Fig. 2, but viewed in' the direction of the arrow 6. Fig. 7 is a hori-y zontal sectional view of thel upper portion of l the engine-case, as taken on the line 7 7, Fig.' `2, and looking upwardly. Fig. 8 is an end elevation of the engine. Fig. 9 is a plan view of the same, a portion thereof, comprising the oil-separator, being shown in horizontal longitudinal section.y Fig. 10 is a perspective view designed to facilitate the description hereinafter given of the peculiar construction of the parts designed with reference to assuring the 1 course of the steam successively into and away from the three steam-chambers of the engine. Fig. `11 is a side view of the rotary appliance i comprised in the oil-separating apparatus.

or chambered body of the engine, having at lthe lower portion'the cylindrical space ci, eX-

tending from end to end, and at the upper portion the cylindrical space a2, also longitudinallyextendingand open along its length to the space a.'

The motor-body is cast with a suitable base IOO ' of vwhich are formed recessed or cutaway, as

seen at l in Fig. 8, each on an arc of a circle, and these recessed portions 10, together with. the internal end portions of the walls of the space a2, are screw-threaded for the reception of the heads a, which close the space d within the upper portion of the motor-cas- The end-closing heads 0.3 and d4 are constructed with concentric outwardly-extending hubs and are formed with concentric openings for bearings for the journal-shafts B.

and C of the rotary pistons and the rotary abutments. n

As shown, the rotary shaft B has at its opposite ends .the circular flanges and 13, which it peripherally closely and yet for free rotary movements therein the internal wall of thecylinder-space a, and between the said flanges or disks are the ianges ordisks 11.

and 12 to similarly fit the space ct in the casing. The said flanges 10, 11, 12, and 13in vpart form ,partitions transversely dividing the Space within the motor-body into several` chambers P, S, and T, the completion of the dividing-partitions being constituted by the blocks or castings b1", i911, Z912, and i213, all having the form of a major crescent andtted in the upper cylinder-space a2, each with its rentrant arc-shaped edge 15 in contact on and conforming to the periphery of the'lange,

' of which itis an edgewise continuation, the

ary partition-sections, are iixed the rotary abutments, astermed in this class of engine, the same being respectively indicated by the reference-letters p2, s2, and t2, each of which is in the form of a cylinder having a size to -t the space a? in the engine-body and each l having the recess 19 at its edge, so that the 55. j tate once to every rotation of the'rotary pisrotary abutments, which are geared at tj, ro-

tons will have recesses 19 in positions to leave unobstructed the passage of the piston-blades when the latter come around adjacent the rotary abutments. i

c indicates the steam -inlet port, which leads through an upper portion of the enginebody near its end portion, Within which is the.

primary steam-chamberP between the rotary partitions 10 and l1, and, as here shown, the poiutof entrance of the inlet-port is about at thejnnction of the one side of the main cylinder-space a with the supplemental space a2 for the rotary abutments, and at about the same height as inlet-port c, but at the opposite side of the engine-case, is a passage d, the same having a spiral course or one which is in' part circumferential around within the internal wall inclosing said space a2 and which also has a longitudinal trend, so that while the one end 21' thereof leads from the chamber lP its opposite end 22 terminates within the space 0,2 on the inner wall of the casing that is covered by the stationary partition b11,which is cored out, as shown in Figs. 1, 3, and 10, to constitute the passage 23 for the steam exhausted from the primary cylinder-chamber P.

` The passage 2 in the stationary abutment blhopposite where it' registers or communicates with the exhaust-portz22 of the primary steam-chamber P, registers or communicates with the port or terminal 24 of the passage e', which also is formed within the thickness of the wall-of the casting composing the enginebody, the same having a spiral coursethat is, it extendsaround to have its opposite end enter the secondary steam-chamber S, la longitudinal trend being given thereto.Av Y

l The steam in the chamber S afterimpingement against the piston-Wing s therein to drive the same around and after the same` has made -the greater part of a revolution leaves the l steam free to be exhausted from said chamber 1 S through the exhaust-port at the terminal of the passage d2, opening to which is the passage 25, formed within the stationary partition b12 above and edgewise against the rotary partition 12., said passage 25 at the opposite side of the case communicating with the duct or channel f, which because of its curved and also longitudinal yprogression opens into the lthird'steam-chamber T at the same side of the engine-body at which the steam had been admitted into the primary -and secondary steam-chambers, and properly oppositel-y-arranged is the exhaust-port g, through which `is discharged the steam which has been used expansively the third time inthe chamber T. It` will be noted that the engine-casing in the plane ofvand above the stationary partition b12,which has the passageZl therethrough, l as aforesaid, also has the ductl or channel 26, of approximately-semieircular form as toits length, `which as Well also as the said passage 25 leads to communication with the aforesaid rpassage f, thelongitudinal trend of which IOO IIO

carries it oset from theplane of the rotary i and stationary partitions 12 and b1? to open into the tertiary steam-chamber T. This construction augments tne transferring-passage from the` secondary to the last steam-chamber to accord with the volume of the steam which has expanded'in the secondary chamber to much greater volume than it had acquired when it enteredl such chamber, i

Viewing Fig. 10 and regardingV the arrows 0*, 6*, and f* as corresponding to and having approximately the relative positionsl of the ducts or passages c, e, and f within the internal wall of the engine-case at one side thereof and the arrows (1*, dtl, and g* as corresponding to and having approximately the relative arrangement of the conduit ducts or passages d, d2, and g at the other side of the upper-portion of the engine-casing, the manner of the successiveaction of the steam against the several rotary pistons in this compound triple-expansion rotary engine will be more easily understood.

Asthe engine has been designed and constructed by me the space circumferentially within the engine-case. around in which the pistons rotate comprises between the entrance-passages for the steam into the steamchambers P, S, and T and the passages c, e, and g, opposite thereto, through which 4the steam is carried out of such chambers, somewhat less than a quarter of the internal circumference of the wall inclosing the space a, and hence the piston s, in the secondary steamchamber S, is set about a quarter ahead of the piston p in the rst chamber P, so that about as piston p shall have fairly passed exhausting-port CZ forits steam-chamber, whereby the steam from such chamberis tranferred into the secondary chamber S, the said piston s will have fairly passed the inlet-opening for the seconday steam-chamber, and so again the piston t is set so far in advance of the second piston s that just about as that piston is passing the exhaust-port ofthe secondary chamber, whereby the'steam is discharged into the last steam-chamber, the said 4 piston twill have fairly passed the steam-entrance port leading into the said steam-chamber T, each of the succeeding pistonsreceiving the impetus of the steam which has been exhausted from the preceding steam-cham ber, but the force of which has 'not been dissipated.

. The end heads a3 and a4 of the engine-casing, provided with the axially outwardly extended hubs 3l, are constructed with comparatively-deep circular openings 30 therein, having the annular shoulders 32, extending centrally through which openings are the extremities of the piston .and rotary abutmentshafts B and C.

33 represents an annular ball-cup 'fitted against the seat at the inner end of the said circular opening 30, adjacentV which is the double cone-ended sleeve 34, and between the one beveled or conical end and the adjacent ball-cup are the hardened balls 35. The said sleeve is loose on its shaft and comprised between the outer beveled or conical end of said sleeve and a second ball-cupf33, suitably adjacent, is a second series of hardened balls 35, the location of the latter being somewhat within the outer end of the opening, which latter is internally screw-threaded for the reception therein ofthe externally-threaded annular plug 36, having al1 internal inner end annular shoulder and which part 36 is also internally threaded for the reception of the supplemental ring-plug 37, which is loose about the shaft and together with the part 36 constitutes the stuffing-box for the shaft.

38 represents a lock-nut which screws upon the exterior of the said part 36, which is extended endwise beyond the hub 3l of the casing-head as or a4, as the case may be, and serves to lock the bearings after the same have been adj usted by crowding the said threaded part 36 to place the cups, balls, and end cones of the sleeve in properly-close relations.

vIt will be perceived that the end rotary partitions 10 and 13 of the piston-shaft and also the end stationary partitions 61 and blare Y,

arranged vslightly distant from the end heads of the engine-case and thatall of the stationary partitions, both at the 4ends of and between the rotary abutments, may have endwise compensating movements as may be imparted thereto by the expansion or contraction axially of the parts mounted on the piston-shaft and the parts mounted on the rotary abutment-shaft, and that any endwise extension or contraction of the piston or rotary abutment shafts will be without eectfto i tween the parts in peripheral contact or prox-` ICO imity than there is between the pistons and cylinders of any engine, and binding of the parts peripherally is overcome in this engine in part by the fact that weight of the running IIO parts is entirely supported within the journals at the end heads and because, furthermore, I'have made provision whereby such impact of the steam as may come transversely relatively to the rotary abutments and which through them may be transmitted to the rotary abutment-shafts is resisted. The provision to this end consists in providing one of the stationary partitions (the one, Z912, which is as near the middle of the engine as practicable) interiorly with a recess 40, in which is received the saddle 42, having the rollers 43 43 j ournaled therein and which are peripherally in contact with the said shaft C, which passes loosely through the said partition 1112, and a threaded plug 44, which screws through the top of the motor-casing and has its lower portion passed loosely through an opening therefor in the upper wall of the -cored-out stationary partition and bears by its lower end against the top of the saddle. This reinforces the rotary abutment at its central` portion, where there would be the greatest the brush nearl its' core. `The mist-likepar#V tageou'slyY supported 'in and' extended'v upv WardlyA above the baseVV of the drain-channel 59 into the chamber G and' lappingbythe-' it toiresiltin carrying the adjacent faces of theabutrnent and rotary partitions outof co'- inciding planes and otherwise' the shaft ont of alinelnen't. The steam is finally exhausted erably forinedAV inhalf-sectio'ns; with angurThese ring-plateA sec' tions are'su'p'ported Vby arms 56',- carried by.

larly-t'urn'ed lips' 55.

sectional hubs 57, which areclamped'y about the/core 52' by therscrejws, bolts',x or rivets'Y 58'.y

vAlolngi; the base of the casingriniwhich' is" the chamber G5, is the channel `59,A the saine downwardly opening-at one end thereof tothe oil-receiver? H, Whilefatthe" end ofthe casing' G' opposite that at whichthe 'steamy iseir-Y hausted' thereiutoisf the final steamdisclrarge conduit 60: A z

. Thefshaft'O'is driven by theexternally'-A Yapplied gearing624 63, shown' aslrun frornf the rotary-abutment shaft-gear jf. v n

' The admixe'd fstearn and'olll er1-term g the 'initial end of the casin'giG'is causedf by the-ring# plateto necessarily mainly'passalong'through:

ticles of oil arearrested by and collected oni thewires` and by the centrifugal action there-'- of thrown outwardly against the surroundingl wallV of the chamber G and rundowntothe Vbottonrthereof intothe channel 59 and thence into the receiverH-.- Asthesteam-Will hav-ef a* tendency to'worktoward the Wall of the chambe'lgthe -succ'ess'ionof the ring-platesfareprovided at 'suitable intervals, as 'before-nnen-V tionedp to constitu-tea steam-breakv,"v so thatit'will haveitscoursediverted severaltimesl toward the core' of the brush togiv'eall por-A tions* of the llatter opportunity to exert its" oil'cellecting action before'the steam-passingI through the chamber G' reaches the Yfinal: dis-` charge-passage 60.y Y

' In addition tothe rotary wires or-collectin'g'- menibers.` I may also employnon '-ro tary wires or collecting members, whichv may be' advan` endsfof the revolublewires,vacant' places being left in thebrushelike appliancetoaccom# modate these stationary Wiresor proj ections".` Thefpurpo'se of these stationary Wiresor pro" jections will be explained as follows:` The' steam* after having entered Within the brush'-l wireswill after awhile have developed a rev` oluble motion more or less nearly in consonance' therewith; whereby the 'beating action by the brush-Wires on the' steil-mand the4 oil 'elements-therein becomes lessened. L t

Theprovisionof the" stationary wires or members projecting from the wauof metas@ Well'tow'ard the core of the' brush constitute l not only additional parts against which the ,steam will impinge and' upon which deposit 1 counteract and lessen trhe'rev'oluble and een'l trif u gal motion ofthe steam,` whereby the lati ter in its continuedgcoir'se' through' the brush wireswil1l' be bythe latter rn'oe ecientiy Vwh'ipped and will consequently insure that the said -brusl'1'wi`res'wi'll' collect thereon a greater proportion of thefoi'l which .i'sheld jin' suspension by the ste'axn passing there= {throughz has been` constructed"- with reference to its capability for utilizati'on'as an.ai'rcornpressing'V `iengineo'r compressor for other compressi'ble fluids o'r-g'ases; attention is thereforev directed ving its substantallyspiral couse through the engine in'- the reverse? direction1 froid-that described for the steamwill by there'voluble .fpi'stonsl which by their rotations in' a ld'irecf- Y tionopposireithan impartedftneretaby nheexpandin'gsteam',l cofnipress theair 'rstjin the large chamber T, again to a furtherlesseued volume inf chamber' S," and' af' third time to' a i still decreasedi vol'u' e' inthe chv benl); the `jso'com'pressed' air passing'- froin-tl'il flfl stconn'-V pression-chamberthrough theport c -.j p Having-thus described niy inventionwhat VI cla'ifnr,y andidesi're to secure'l by Letters Patglent, ist-L" v "1.Ip`n a"rotary'concentriclpistoi compound steamen'gine,thechambeed'engine-caseghavving therein a shaft provided with several sep' l: aratedy rotary partition-flanges;and therebetwee-n piston-wings extending I roni- ,the one Bange to'l theothler;- an d-afsecond shaft `lifaviu gY ltherotary abutments, the lenigths'of whichl correspond to the spaces between the-rotary fpartitionliia-nges; and uon-rtar'yiparti ions between y the rotary abutmentsgf complemeni? peripherally fitting the internali wafll of the single enginei'casega steain#inlet4 passage'lead-l ng into the steam`-chamber comprised beff tween the Iirst twoV rotary partitions,-faf4 dis herefroni andenter'ingaA succeeding' steainjcharnber`withinthe-said casing and' anyon-` "haust-passageifor-suchlatter' stearn`cha`1nber. 2j. -I'n a `rotary concentric-piston lcompound Q steainlen gine, the chambered engine-case ha'ving therein a'shaftprovided-Wift'h several-sep# g arated'rotary partition`"ianges3V and therebe# flange to theother, and a' second'V shaft hav# m'ore or less 'of the contained oi'li` but will .tary to andl arranged edgewise'VV adjacent-'the {'rotary partitions4` all said rotary' partitions' androt'ary abutmentsbeingcon-tainedfinand chargiugpassage for that' chamber leading' {'ltiieen piston-Wings extending frein 'tli'e' one ling the rotary abutments5thelengths of which inasmuch afstifel engin-entrent descritta to the fact thatla'ir" introduced into and havcorrespond to the spaces between the rotary partition-anges, and non-rotary partitions between the rotary abutments, unattached to the engine-casing and free for compensating movements longitudinally of the engine, and arranged edgewise adjacent the rotary partitions,all saidrotary partitions and rotary abutments being contained in and peripherally fitting the internal wall of the single enginecase, a steam-inlet passage leading into the steam-chamber comprised between the first two rotary partitions, a discharging-passage for that chamber leading therefrom and entering a succeeding steam-chamber withinV outer faces of said flanges adjacent theinner.

sides of the end heads being separated therefrom and the other` shaft having a rotary abut-` ment running between two of the rotary par-1 tition-flanges, a piston-wing extending between the rotary partitions and constituting a movable Wall of thev steam-chamber comprised between such' flanges, a' steam-inlet passage and a steam-outlet passage leading poses lset forth. y 4c. In a concentric-piston rotary steam-engine, an engine body or casing comprising the partially-cylindrical space a and the adjoining partially-cylindrical space a2, the one being openrto theotherand having opposite end heads with journals, parallel longitudinally-ranging shafts B and C, journaled in said end heads, and capable of axial compensating movements therein, the one shaft having separated Arotary partition-flanges peripherally fittin' g the internal wall of said spacei a, the outer faces of said flanges adjacent the inner sides of the end heads, being separated therefrom, and the other shaft having a rotary abutment running between two of the rotary partitions,l the unattached non-rotary partitions of crescent shape edgewise fitting the peripheries of the rotary partition-flan ges, a piston-wing extending between the rotary partitions and constituting a movable wall of the steam-chamber comprised between such flanges, a steam-inlet passage and a steamoutlet passage leading to and from the steamchamber, for the purposes set forth.

5. In a concentric-piston rotary compound steam-engine, lan engine-casing having the spaces a and o? extending from end to end, and having a series of steam-inlet ports'arran ged along one internal portion of said casto and from the steam-chamber, for the pur- Ving and steam-outlet ports arranged along a suitably-distant internal portion of the casing, parallel shafts, one carrying piston-win gs and the other abutments, partitions between cooperating pairs of the piston andabutments, which separate the steam-chambers, into and from each of which one of the inlet and outlet ports communicate, and unvalvedor everopen and unobstructed passages leading from the outlet-port of a primary steam-chamber into the inlet-port of a secondary steam-chainber, for the purpose set forth.

6. In a concentric-piston rotary compound steam-engine, an enginecasing having the spaces ct and a2 extending from end to end, and having a series of steam-inlet ports arranged along one internal portion of said cas- ,ing and steam-outlet ports arranged along a 'suitably-distant internal portion of the casing, parallel shafts, one carrying piston-wings and the other abutments, partitions between cooperating pairs of the pistons and abutments which separate the 'steam-chambers, into and from each of which one of the said inlet'and one of the said outlet ports'commu- `nicate, and unvalved or ever open and un- `obstructed passages leading from the outletport of a primary steam-chamber into the inlet-port of a secondary steam-chamber, the

piston-wings revolving in a secondary chamber being set in advance of the piston-wing in the steam-chamber primary thereto,for the purpose set forth. i, 7 In a compound rotary concentric-piston engine, an engine case or body constructed for and receiving the piston-shaft B having several separated rotary partition-anges with partition-wings extending from the one iian'g'e to another, and the rotary abutmentshaft C having rotary'abutments lapping by, and entering the spaces between the rotary partition-flanges wherein are comprised the steam-chambers, an inlet for the first steamchamber leading Athereinto, an outlet ,port leading from said steam-chamber and continued in a substantially-spiraldirection and terminating in a suitably-opposite port entering the next succeeding steam-chamber.

8; In a compound rotary concentric-piston engine, the engine-case having journal-supported-thereby the piston-shaft B and a rotary abutment-shaft 0,the first having aplurality of piston-wings and the second respectively cooperating rotary abutments, partitions dividing the spaces in which the piston-wings revolve one from another constitutin g together with the engine-case separate steam-chambers, means for introducing and exhausting the steam into and from the several chambers successively, and adjustable means for reinforcing the middle portion of the abutment-carrying shaft against being deflected by the steam-pressure transverse thereto. i

i f 9. A compound rotary concentric-piston engine, comprising the 'engine -case and the j ou mal-supported piston-shaft B with rotary IOO IIO

IZO

piston-Wings and the rotary abutment-shaft' 10. In a compound rotary-engine, compris-A l ing shafts having .several piston-Wings,V and coperatin'g .rotary abutments, partitioning means between the 'pistons' and abutments,

whereby the separate steam-chambers are comprised Within the engine-case that is in p common to, and incloses allv the rotary pistons and corresponding rotary abutments,a steampassage leading into the primary'steam-chamber, and passages continued from each steamcha'mber, to each succeeding steam-chamber whereby the 'steam is caused to pursue a practically-helical course through the engine for successive expanding actions against the piston-Wings in the respective chambers therefui. p

' 1 1. In a rotary engine, the end heads thereof having centrally-apertured hubs through which' the shaft of the engine extends which is provided with the closely-fitting butunattached sleeve cone-formedat both its ends,A the series of balls provided to support the inner conical end of the sleeve, a second. series of balls and arball-cup outside thereof provided' in the hub-opening on Which'balls the outer conical end of the sleeve is supported, the'annular screw-plug 36 threading into the Voute endpo'rtion of said apertured hub against said ball-cup, and serving to adjust the same and a locking-nut on the outerl end thereof, all whereby endwise expansion of the shaft may be Without effect to change the adjusted conditions of the said ball-bearing.

12: An engine-case, having spaces each of the form of a portion of a cylinder and the one along its length open to the other, longitudinall'yranging parallel shafts, piston- Wings on one shaft and rotaryrecessed abutments on the othershaft, stationary partitionsections between the rotary abutments, and in the'planes thereof vdisks concentric with the piston-shaft which divide the chambered engine-case into separate steam-chambers, an

inlet -bpening entering the primary steamohainber, and an outlet-passage leading from each steam-chamber into the chamber secondn ary thereto.

13. In a compound concentric-piston rotary engine, the combination with the engine-casing Aconstructed lWith the longitudinally-extendinfr s aces .a and a2 each com rising aportion of the cylinder and opening the one to the other, the rotary piston-shaft having the rotary partitions 10, 11, and 12, whereby separated primary and secondary steamchambers are constituted Within said casing,

'the non-rotary partitions 510,511, and'bwarranged in the planes of and adjoin'ings'aid rotary partitions, the one b having the passage 23 therethrough which opens 'to the opposite edges thereof which are fin" contact against opposite sides of the wall of "said space a2, the port leading through the enginecasing at 011e side into the primary chamber, a port formed Within the internal Wall of the casing at the opposite side of the primary vsteam-chamber, and continued around'and also endwise to connect with the`ne end of the other, and provided with the steam-inlet j portc and other ports'fe and f which are continue'd in passages having a course around and also endwise along Within 'the inner-Wall of the said space 0,2,the rotary piston-shafthavin g the rotary partitions 10, 11, l2, and'13, fitted Within the saidfspace 1 and the non-rotary crescent-shaped partitions bwand 1913, and the non-rotary partitions bu'and E12 Which'have the' passages 23 and f 25 Y therein"vv-hichopenat the opposite-edges thereof, said Vpassages each at its one end `matching with'thepassages continued from said ports and j,- the piston-Wings p, s, andt, and thecorresponding rotary abutments p2, s2, and t2, andmeans for rotating them and said casing furthermore having the ports 'd and d openinga't the inner portion of the Vchamber a covered bythe said non-rotary partitions h1? and Z212, and'having communication With'the passages therein and having endwise courses and terminating in the second and third steam-chambers, and

an exhaust-passage for the third steam-chamber, substantially as described. 'f f 15. In a rotary engine, an engine body or casing having partially cylindrical'spaces therein, Aopening the one co-the other, and extending to the end 'of the casing, and an end closure for 'the enginefcasin'g comprising a head of-circular form fitted at the end fofthe IOO one partially-cylindrical space, andhaving a curved recess in Vits edge, and acylindrical head fitted at the end portion of the other cylindrical space and also vmatching' Vin the curved recess of the rst-named head.`

16. In a rotary engine, the engine bodyV or casing having the partially-cylindrical spaces therein opening the one to the other, and extending to the end of the casing, and an end closure for the engine-casing comprising a head of circular form screW-threadingn the end ofthe 'onc p'artially-cylindrical space and having a curved threaded recess in its edge,

the corresponding headan annular packing may be interposed. Io

Signed by me at Springfield, Massachusetts, this 23d day of October, 1899.

LESLIE A. COOPER.

Witnesses:

WM. S. BELLoWs, M. A. CAMPBELL.

Images