US702624A - Rotary engine. - Google Patents

Description

No. 702,624. Patented lune I7, I902. W; L. CASADY.

ROTARY ENGINE.

a lication filed Dec. 9, 189B.) a Sheets-Sheet 54- -1 F J F Z 55 I (No Model.)

w.v L. cAsAuv. ROTARY ENGINE. (A lication filed m 9, 1599.)

3 Sheets-shout 2.;

a mmiw gg w ff 1m: NORRIS FETEhi LO. PHDTO-LITHD" wnsnmc-Tos u 4:

) Patented June 17,

Y E on l 8% AE n A. m

(Application filed Dec. '9, 1899.)

(No Mudfl.) v

. UNITED STATES PATENT Ornrcnf WILLIAM LfoAsADAY, OF SOUTH BEN INDIANA RQTARY' E NGIN E.

V sienctnrcnlmrom forming part ofLetters j1 a'e-.ao.- 702,624, dated June 17,1902. npplicationfiledDecember9,1899l sennn 5.-7s9.-vs7.i mainta n To ctlZiu/tomit flea/y concern.- 7 v Be it known that 1, WILLIAM L. OAsADAr,

a citizen of the United States, residing in South Bend, in the county'of St. Joseph and State of Indiana, have invented certain new and usetul Improvements in Rotary Engines,

. of which the following is a specification.

My invention-relates especially to an improved form of" rotary engine having a casing wherein two cone-shaped'sections'with valveseat and journal extensions thereon arebolted together at their'bases and a correspond- My invention also relates-to certain details- 3 for introducing ,Steam to act upon said packing and to introduce steam behind the sliding pistons, and to certain details of. con-. 'struction and combination of -;parts zherein the engine-shaft. l 4 I My invention also relates to a'novelform of rotary steam -valve and oscillatingcutoft ing cone-shaped hub and engine-shaft supported eccentrically to the casing, andpistons sliding diametrically therein to follow the eccentric inner wall of the casing to drive;

valve and to means-for. connecting and operating them and also to agnov elform of reversing slide-valve and to an improved valve-' box for containing saidlvalves especiallyadapted to and formingpart of my improved:

engine.

of construction adapted to myinvention--viz. to an improved packing for theengine-shaft, to an improvedabutment-packing, to an improved piston-packing, to improved means after particularly described with :referenco to the accompanying drawings, wherein Figure 1 is a central vertical longitudinal section of the engine; Fig. 2, a vertical section in line x a; of Fig. 1, with the-valve box and gear in elevation; Fig. 3,'an enlarged;

section of the valve-box in the central'line of the valve-stem upon an enlarged scale; Fig. 4, a perspective view of the oscillatory cutoif valve and operating-lever; Fig. 5, a perspective view of the rotary steam valve and valve-gear. Fig. 6fiis a.central transverse blocks.

ing the pistons outwardly, andxiFig. 10 is a and closing the exhaust toftheichanneislead- Zing tothepiston-pockets'in thehub'for forcv perspectiveview of one otthe'apex' ahutmentp The engine casing-A consists of 'two corre-' lspondi ng-sections in the form ofi cone.-frus 'tums A A each havingia'ysleevea at its outer truncated end's's-Ja'nd a valveseat'a, at

thetop bolted together, flanges afi with bolts,

a at their base oirim ofthesec'tions-serving to hold them securely together at'the l central transverse line ottheengine, thus only requiring a single joint, which may be easily and inexpensively fitted. up, and dispensing entirely with piston heads .aud nu ,merous parts which are liable to become unjtruewh'enpacked' and set up, the"axial line of the shaft and'wearing-surfaces ot'. the cas: ing being thus dera'ngedin awaywhich would I -materially affect the true relationship of the p gwearingparts' of'th'e' engine.

The 'casin g A has'lugsaon the under sides I The shaftBis made eithersep'a'rate or cast integral witha d'ouble-coned hub 13' and is supported in bearings O DzOf noveljcons'truc- 17s. iofthe sections A "A? and 'i'sco'nnectedrby I bracketsa with abase A in a suitable 'manner.

.tion and is placed eccentricto the axis of the casing, thus providing lune-shaped spaces a between the hub and casing, through which 'areprojected wedge-shaped piston-plates E,

which are adapted -to' slidejfreely' within a pocket 1), extendinglongitudinally through theh'ubandbetwe'en the verticallune-shaped walls a a 'of thecasin'g', the sidesof the,.pis-.

.ton-j'plates beingp'arallel and fitted with steam-actuated pac'kingstrips'F," fitted in; a

jno'vel mannerto the ends'ofthepiston-plates' tobear at an times against the ends of the" casingand make a s't'eam tight connection,

while the pistons are allowedjto reciprocate freely within the, po c'k'et liof "thelhubl.(The' strips F have a beaded side f, which fitwithin a corresponding groove e in the'endsf 'e of the piston to allow'thdstrips to turn; slightly therein, as shown in Fig.8,and when thelenbethus employed upon opposite edgestherea v of. A steam-aperture e inthe pistons adja+ cent to each of the strips F extends from the J i'ooa gine is inadereversibl e'tw'oof saidstripsmay faces of the piston-plates to the grooves e, bearing-surface for thejournal K, which may thus admitting steam from the working side of the piston to act upon the strips and press them outwardly with sufficient force to make a steam-tight joint. The straightinner sides a of the pistons have sufficient space in the pocket 1) between them to receive a volume of steam admitted thereto through channels 1), extending to the outer surface of the hub B and fitted with a check-valve G, (shown tin Fig. 0,) which has a double seatin the channel and is opened by the steam under pressure to admit steam to the pocket and is closed against the exhaust, said valve being preferably placed in position to the steam admitted from opposite sides of each piston, thus being always closed to the exhaust and open to the steam from whichever direction the engine is turning. the piston-plates areinclined toward the shaft from the center to be parallel to the outer surface of the hub and the inner surface of the casing and bear against the latter, the edges 6 of the said side 6- being rounded with a grad tially-increasing curvature from the inner to the outer ends thereof, thus to compensate for their gradually-decreasing surtace Wear and contact from the larger to the smaller diameter of the casing, and thus al- 0 lowing outer ends of the pistons to Wear evenly and keep in constant touch and uniform contact with the inner surface of the casing.

The hub B conforms to the inner surface or the casing and bears at the top thereof against two abutment-strips H H, each of which has a central bead'h at the top thereof In ill in a corresponding groove a in the casing, which will allow the said abutmentstrips to rock or teeter therein, as on a pivot, a steam-aperture a in the casing leading to the steam ports near the valve-seat being provided to admit the steam to each side of the bead h and above the strips to press the edge of thelatter upon the steam side of the abutment and shut otf completely the passage of the steam from the steam to the exhaust side of the pistons. Two apex abutment-blocks H as shown in Fig. 10, have pivot ends and are set into corresponding recesses in the easing to fill the space between the ends of the abutment-strips H H, and thus completely bridge and make steam-tight the intersecting surfaces at the base of the double-cored hub. The sleeve aof the casing-sections inclose and support the bearings Cand D of the hub and shaft-journal K, the latter being formed in a novel manner to comprise stepped sections I0 70 H, and 7 3 the section 713' being a short extension or conical end of the hub 13 and the sections W, and 7: being substantially of equal width with that of section it and of very slightly coned or cylindrical surfaces and of gradually-decreasing diameters, and the sections 76 being of greater length and tapering to the outer end of the outer bearing D, thus providing an extended broken The outer side 6 of.

be kept up to the correspondingly-formed inner surface of the bearings C and D and make a steam-tight journal-bearing which will not bind the journal sufficiently to cause material friction or loss of power incidentto the bearings. The bearing C receives the journal-sections 7c 70 k 70 and the bearing D is babbitted and extends from the outer to the inner end of section 7c and abuts against the outer end of section k and is held and adjusted securely upon the end of the sleeve ct by set-bolts d and is coupled to the outer end of the bearing 0 by guide-bolts d, projecting from the bearing D into holes in the bearing C, which prevent the bearing G from turning with the journal. A space 01 between the bearings O and D and an aperture l in the sleeve a of the casing are connected by a steam-pipe Z with the main steam-pipe L, and a stop-cock Z in the pipe l controls the passage of steam through said pipe and allows it to act with a suitable degree of pressure upon the bearing 0 to hold it closely in contact with the hub and shaft-journal, and thus provide a very simple means for taking up wear and also for exerting any required pressure upon the inner journal-bearing to effectually prevent the escape of steam from the engine through the journal-bearings. sleeve a of the casing has packing-grooves m therein to receive hemp or other fibrous packing, and thus guard the outer surface of the bearings from the escape of steam and also allow the hearings to fit with suflicient freedom to be easily adjusted; The inner edge of the bearing 0 joins the hub B in the line of the inner surface and the vertical side walls of the casing and at the outer point of the abutment-strips H and holds the steam at the abutment and prevents the steam from leaking at this point when the parts are slightly worn.

Branching ports N lead from the valve-seat ct on each side of the abutment to points a at the outer ends of the hub and slightly above a horizontal line passing through the axis of the engine-shaft, the valve-seat openings n n being at equal distances from the center line of the engine and upon opposite sides of a port 19' in the valve-box P and in line with the axis of the pipe L and the center of the rotary steam-valve R and the oscillatory cut-off valves S. The valve-box P has a rectangular chamber p in the bottom thereof, within which slides a flat rectangular boxshaped reversing-valve T, which serves to admit and exhaust steam to and from either side of the engine or completely cut off the steam in whicheverposition it may be placed by means of a stem t, passing through a stuffingbox if in the end of the valve-box and connected to the lever T, pivoted to a pin on the casing, adapted to be held in any one of three positions by suitable means, a segment-arc t and locking-bolt i being shown in the drawings for this purpose.

The i end of the valve-stemhas a sprocket-wheel'v,

The valve T has a central dividing-wall t and ports i at either side thereof, opening both at the top and at one side of the valve,

said valve is at either end of its movement,

communication being thus obtained between the central steam-port p and the steam-port upon the one side by means of one ofthe chambers t and communication also obtained between the said valve-seat openings and the .exhaust port p of the valve-box P. through the port 25 ort? in the open'side of said port adjacent .to the exhaust-port, as clearly shown in Figs=6 and 7,.the said drawings' showing the right-hand portsopen to the steamand: the left-hand ports open to the exhaust. a The exhaust-port, as shown in the figures: referred to, is. formed in the base, of thevvalve-box and extends upwardly to an enlarged circular channel upon either side of eter with the outer surface ofthe cut-off valve, thus to completely and snugly fit the said bore, exceptat the ends thereof, which is packed, a cap r upon the end of the sleeve R,.which supports thevalVe-Tstem 7", serving to close one end of theiborep, and a stuffingbox screw-cap R upon the other side of, the valve-box serves to take upthe packing and also to support the stem S of thecut-oif valve S, thus providing a steam-tight closure for both sides of the open-sided valve-box. The

driven by a chain V from a similar wheel 11 on the engine-shaft, for giving constant rotation of equal number-and proper relation to that of the pistons carried by said shaft, the steam-slot r in the valve presenting its op-' posite ends to the steam-pipe. and steam-ports p,- thus'giving steamradmission for each pis-- ton as 'itpasses the steam-port in the casing.

The hub of the sprocket-wheel c has a slot 11 therein to-receive a pin on the engine-shaft,

and thus provide meansfor shifting the rela tive position of the said valve and shaft whenthe engine is reversed; as claimed and described more fully in the patentgranted to me and dated November 28,1899, as the valve requires resetting when the engine is reor less distance of its movement, and the up- "per end of said slot receives an abutment block p, projecting therein from .the valvebox to a surface contact with the steam-valve, thus to shut oif the steam-on one side and prevent it from leading back' withthe aperture of the cut-off valve and-securing premature admission. to the slot of the steam-valve.

The length of the aperture through which the steam-slot travels:is'thusincreased or diminishedby oscillating the cut-off valve.

l The cut-off valve is oscillatedby a lover S affixed to the valve-stem S and adjustablysecured by a latch S to a rack S securedto the valve-box.

The engine thus described is mad'e'of'parts' {securely held together, is inexpensive ,to fitiup,

light and small withoutgreat loss of power or Waste of steam, as the cut-offwilhonly adi mit of. the use of sufficient steam todo the amount of workrequired of the engine.

I claimas my invention and desireto s'ecure'by Letters Patent" 1. Amotary-engine casingv comprising two core 'frustu m-shells bolted together at their bases and having eccentrically-disposed journal-sleeves at their-truncated ends an engine shaft and pistons adapted to rotate said shaft 1 and conform to the inner eccentric wall of the casing, substantiallyas described;

2. The combination with a rotary-engine casing in the form of two cone frustums placed base to base'andhaving journal bear-- ing sleeves extending eccentrically there from, of an engineeshaft having a pistonhub formed of two conical ends adaptedto fit the tapering inner wall of the casing andpis tons'fitted to slide diametrically upon said hub and having outer endstoconformtothe surface of said casing,rsubstantially a 'd scribed. 1 v

3. The combination with a rotary-engine casing having two conical endsand bearingsleeves eccentric thereto of a-shaft, a hnb having ends to conform totheconical ends of the casing j ournal-bearings upon the shaft 7 and within the casing sleeves extending to the conical ends of thehub and pistonshaw supported eccentrically thereto, of pistons; slidably supported in the hub and having the outer ends thereof inclinedto conform tothe cones of the casing and-rounded on their cor-" ners with gradually-increasing curves from the inner to the outer ends thereof, substantially as described. w

5. In a rotary engine the combination with I to a casing, a shaftand hubfitted ecc'entrically within the casing, piston-plates slidably supported within'the hub to projecttherefrom andhaving parallel-sides tofollow the fiat lune-shaped ends'of the casing and'packingstrips having a head to fit a corresponding groove in the sides of the piston, substantially as described.

6. In a rotary engine the combination With the casing of a shaft and a conical hub fitted eccentrically thereon, pistons supported and movable therein, abutment-strips pivotally supported upon the oppositely-inclined Walls of the casing and apex abutment-blocks pivoted to the casing between the ends of the abutment-strips to bear against the hub and steam-apertures in the casing leading to the back of the abutment-strips and apex-blocks substantially as described.

7. I11 a rotary engine the combination With a casing having conical ends of a hub correspondingly coned and fitted therein and two abutment-strips pivoted to the casing to bear against the said conical ends of the hub, substantially as described.

8. In a rotary engine the combination with the engine-casing of the shaft and a journal thereon comprising stepped sections and two bearings fitted upon said stepped sections one of said bearings being secured to the casing and the other section adapted to be set up independently thereof and a steampipe leading to the space between the said bearings, substantially as described.

9. In a rotary engine the combination with the casing of the shaft and a journal thereon comprising an inner coned section a number of short sections of gradually-decreasing diameter, a self-adjusting bearing adapted to said journal-sections, an outer conical journal-section and a bearing adjustably secured to the casing and adapted to the outer coneshaped journal-section, substantially as described.

10. In a rotary steam-engine the combination of a casing a shaft, a hub and piston having cone-shaped ends an abutment-strip extending tothe end of the hub a shaft-journal having an inner cone extension from the conical end of the hub and a bearing adapted thereto and extending to the end of the said abutment strip, substantially as described.

11. In a rotary engine, the combination with the casing of the rotary shaft and hub located eccentrically to the inner wall of the casing, slidable pistons carried thereon, a steamchest, a steam-pipe leading to the top thereof, a rotary steam-valve having a slot passing diametrically through the same, an oscillatory cut-off valve adapted to the steam-valve,

and a slide reversing-valve located between the steam-valve and steam-ports having ports leading both vertically and laterally therein, and a valve-chamber having ports leading from the lateral ports of the slide-valve and across the axis of the steam-valve.

12. In a rotary engine, the combination with the casing, of the rotary shaft, the rotary pistons, and the rotary steam-valve geared to the said shaft, and having a slot passing diametrically throngh the same, the oscillatory cut-off valve adapted to the steam-valve, having ports located upon opposite sides thereof, a valve-box having a steam-pipe leading to the outer one of said ports, and an abutmentblock upon the valve-box projecting through the said outer port and bearing upon the outer surface of the steam-valve.

WILLIAM L. (JASADAY.

\Vitnesses:

ADOLPH S. GINZ, B. H. WIGGINS.

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