US831120A - Rotary engine. - Google Patents

Description

No. 831,120. I PATENTED SEPT. 18, 1906. E. TAYLOR.

ROTARY ENGINE.

APPLEOATION FILED MAB..16, 1906.

4 SHEETS-SHEET 1.

/ IL I R Q Ill r v @Wzs, 72% m I r I ai itoma o Z w ma @N um 9w M K \Q Q Q, N QNW N w .f H mN No. 831,120. PATENTED SEPT. 18, 1906.

E. TAYLOR.

ROTARY ENGINE.

APPLICATION FILED MAR.16, 1906.

4 SHEETS-SHEET 3.

PATENTED SEPT. 18, 1906.

E. TAYLOR.

ROTARY ENGINE.

APPLICATION FILED MAR. 16, 1906.

4 SHEETS-SHEET 4.

m different mod' cations of the passa es 1..

EDWIN TAYLOR, OF NEW YORK, Y., ASSIGNOR TO TAYLOR HERRICK ROTARY ENGINE COMPANY, A CORPORATION OF NEW YORK.

ROTARY ENGINE- No. 831,120. Specification of Letters Patent. Patented Sept. 18, 1906.

Application filed March 16, ,1906- Serial No. 306,458. I

ber Z. The periphery of thebarrel D is a 55 true circle, which intersects the circle of the wall a:,-so as to occupy a recess g, which recess is preferably formed to correspond to the curvature of the periphery of the barrel D, thereby extending the contact area of the 60 meeting surfaces of the barrel periphery and easing. About midway between the'ends of the recess y is a transverse socket for thepacking-strip 2, which extends approximately across the barrel and may c'ontaina 55 s ring 3 to ress said strip toward the barrel.

he ends the-barrel D extend into annular grooves w in the end walls or-heads of the casing A.

1'0 all whom it ima z concern:

Be it known that I, EDWIN TAYLOR, a citizen of the United States, and a residentof New York city, borough of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Im rove ments in Rotary Engines, of which t e following is a specification.

My invention relates primarily to rotary ro engines, although it may be usefully applied to pumps.

It has for its object to overcome difliculties incident to that class of a paratus in which an eccentric barrel is use in connecr 5 tion with a shaft provided with a piston extending through the barrel.

he parts of the apparatus are constructed as fully set forth hereinafter and as illustrated in the accompanying drawings, in

which 4, extending into recesses in the barrel. This Figure 1 is a vertical section transverse to, block is slotted for the passage of the piston 7}, the shaft, illustrating one construction em- C and has recesses for packing-strips 5 5, each ploying my invention. Fig. 2 is a sectional of which may be, pressed toward the piston elevation on the line 2 2 of Fig. 1. Fig. 3 is a by a spring 6. When the chamber X is used 2 5 sectional elevation transverse to .the shaft of an engine in which the details of the engine are somewhat differently constructed and arranged. Fig. 4 is a vertical section on the line 4 4 of Fig. 3. Fig. 5 is a sectional plan 3 on the line 5 5 of Fig. 3. Fig. 6 is a transverse section of the rocking bearing on the turn the shaft B in the direction of the arrow, line 6 6 of Fig. 4. Fig. 7 is an edge view of F' the barrel. Fi s. 8, 9, and 10 show three chamber between the piston and what I term .the abutment-that is, the recess y where the barrel meets the curved wall a: of the chamber X-the extent to which the barrel 9o enters the recess y tending'to prevent leakage past the stri 2 at this point.

11' Fig. 1 t e exhaust-port 8 is shown in the end wall of the casing so arran ed asto com municate with the interior of t e barrel. D. 5 An im ortant feature of my invention consists in tlie rovis'ionmade for the passage of steam'or 0t er fluid between the chambers X and Z past the barrel D. This provision conto receive a rocking bearing-block E with curved edges adapted to those of the sides of the socket and, if desired, with end trunnions ranged to admit steam or other fluid under 80 3 5 Fig. 11 1s asection showing a means 0 comensating for wear of the piston-bearing. igs. 12 and Y13 are vertical sections of the apparatus as used for transmitting motion to a fluid, as in a pump, the sections respeco tively coincident with the longitudinal axisand transverse of the apparatus.

Referring in the first place to the form 5 contains a circular chamber X, concentrically through which chamber extendsashaft having a hub or enlargement 1, from which piston O, forming a art thereof, ex-

/ tends to the circular wall a: o the chamber X. o The end walls or heads of the chamber "X ranged that when the iston moves in the direction of the arrow, ig. 1, it does not open the first of said series of passa es to the steam behind it until it has traverse about one-half rotation from the inlet-port 7, from which I point the number of passages of said series is a ring or barrel D, extending from head to opened for the passage of steam willincrease' head of the casing A and inclosing thechamuntil the piston has reached approximately There is a-transverse socket in the barrel 7c 4 sists, preferably, of a series of passages so arroo" the abutment. The series of these passages is therefore shown in the drawings as comprehendin nearly one hundred and forty degrees 0 the barrel and as located on the opposite side of the barrel from the port 7 Theoretically the distribution of these passages would be in an arc of one hundred and eighty degrees between the outer edges of the extreme passages; but in the construction shown the barrel enters the recess in the easing for a purpose described hereinafter, so that this arc is lessened by the extent to which the abutment advances by this entrance of the barrel into said recess.

sages may be somewhat varied from that named it is nevertheless important to the efficiency of the engine that it should be approximated to such a, extent that the fluid cannot be trapped as the piston approaches the contact-points of the barrel and easing or hub. With the series of passages comprehending the extended scope of the iston-stroke shown, although the ressure of steam upon the piston will be app ied to only a portion of the piston area during the movement of the iston' in the direction of the arrow, Fig. 1, irom the port 7 nearly to the first of the passages t, nevertheless from the time that the piston commences to open up said series of passages until it approaches the exhaust-port the pressure of the steam will be upon substantially the full piston area. In other words, as shown in Fig. 1, the pressure of the steam upon the piston as it moves in the direction of the arrow on the first stroke ahead will be upon the portion of the piston in the chamber X only for about one hundred and thirty degrees. It will then be exclusively within the chamber X upon substantially the whole of the piston for over ten degrees. It

. will then be upon substantially the whole of the piston, partly in the chamberX and partly in the chamber Z, for about one hundred and fifty degrees. It will then be upon substantially the whole area of the piston exclusively within the chamber Zi'or about forty de rees or more. For all strokes of the piston succeeding the first the residuum of pressure from he last preceding stroke will continue on the piston within the chamber Z until the' piston commences to open the exhaust, which is at a point of the piston-stroke beyond the point at which it has opened the inlet-port 7 for the'next succeeding stroke. Therefore in the regular running of the en gine the'portion of the piston-stroke when its whole area is not substantially under pressure will be limited to about ninety degrees. By full piston area I refer to the area correspending substantially with the area of the piston in the chamber X at the point of maximum pjrotrusion of the piston through the barrel The position individually of these though the scope or field of this series of paspassages t is also important. In order that shaft B, as shown in the drawings, and the width of each individual passage is less than the width of the piston. In this way at no time in the operation is any passage open on opposite sidesof the piston at the same time, and therefore there is no time inthe operation when the steam can pass across the piston through any passage. I

I have shown various forms in which the passages between the chambers X and Z may be constructed. Thus in the form shown in Figs. 1 to 7, inclusive, these passages are formed partially by notches v in the edges of the barrel and partially by the channels cut in the heads of the casing. In this form the steam passes around both ends of the barrel, though in certain instances it will answer to confine the passages to one end of the barrel. In Fig. '8 the passages t are shown as in pipes extending out through the liead of the casing on one side of the barrel-groove therein and into a superheating-iiue 57 and returning through the head of the casing on the opposite side of the barrel-groove therein. In Fig. 9 the passage 15 extends the same as in Fig. 8, excepting that it is formed wholly within the casting of the casing-head. In Fig. 10 the passage fis the same as in Figs. 1. to 7, inclusive, with the exception that it is wholly fdrmod by a channel within the casing head without any notches in the edge or the barrel.

The port 7 is controlled by a suitable valve, so that the inlet of the steam may be out 01f at desired points of, each stroke of the piston. The valve shown in Figs. 1 and 2 is arranged to run the engine. anticlockwise with variable cut -0fi' and clockwise with constant pressure throughout the stroke. The valve in Fig. 3 is arranged to run the engine in either direction with variable cut-off or with constant pressure throughout the stroke, starting at any point.

The valve consists of a casing 65, having a circular valve chamber, within which is mounted a sleeve 10, within which is 1nount ed a cylindrical valve member 12. The valve member 12 is constantly rotated in time with. the engine by connection with the main shaft of the engine i and contains the passage 66, whereby the steam-main 67 is in the position. shown in Fig. 3 connected with and out off from the port 7 at determinate times of the stroke. The sleeve 10 is oscil lated by hand, and the passage 68 the eof places it within the power of the operator to connect the steam-main 67 either with the port 7 for going ahead or with the passage 69,

- by the piston in its rotation.

' slight 0 leading to the ort-S, Fig. 5, for reversing at any point 0ft estroke. Thus it is within the power of the operator by utilizing the passage 68 to dominate the cut-off 66 and cause the engine to be run either under steam direct from the boiler or under expansion.

the englne operpassage in the sleeve 10.

VVhen'the steam is cut off at any point of the piston-stroke, it will thereafter, and this action will for a great portion of the pistons' traverse be upon the entire available area of the piston. v

To permit the escape of condensed fluid in exhausting whenthe piston is moving in the direction of the arrow, Fig. l, the port 8 has a tapering extension 14, which is continued,

to the lowest point Within the barrel traversed It is intended 1n reversing to use entrance-port 7 as an exhaust and exhaust-port 8 as an entrance:

port.

' It will be seen that the piston during its rotationassumes different angles with respect to the barrel, which is permitted by the rocking bearing E, but without the pressure tends to seat such bearing'in its grooved socket, while the strips 5.efl'ectua lly pack the faces of the piston.

The packing of the piston where it passes through the barrel in some such manner as at the rockin bearing E is essential, becauseoth'erwise t e steam-pressure would be equalized on both sides of the piston at some portion of the stroke corresponding to a deadcenter. It is also necessary to provide a positive bearing for the piston when it passes through the barrel, because if there was-the slightest play or lost motion the hammering at a rotation of several'hundred revolutions a minutethe speed attained in actual practice would' soon destroy the parts. As the ends of the barrel extend into annular grooves, the bearing-faces of the barrel and grooves will wear evenly, objections incident to the barrel the ends of'which side walls of the casing.

In reversing the engine in order to prevent trapping between the port 7 acting as the outletort and the abutment I provide a earance-space 40, which communithe port 7 over the exthus avoiding the use of a rotatable bear on the inner cates backward with tremity of the piston.

In the construction shown in Figs. 3 to 6 the general arrangement and the construction of some of the arts correspond to those already described; ut there are additional features, embodying principally packing means (not shown in the other figures) and to anextent of act expansively cross portions of which the use of a shaft having a hollow enlarge ment or hub, the chamber Y of which communicates with the exhaust-port. As shown the chamber Y has end ports 8 communicatports 7*, Fig. 5, of to t e exhaust-port 8.

The hollow hub has a port it at one side, and the series ofchannels tis so arranged and the port n in the hollow hub of the shaft is of such dimensions that in cannot be confined between the iston and the'converging walls of the charm er X and the peri hery of the hub until the piston has the casing leading tial area is exposed between the hub and the inner face of the barrel and sufficient reversing power is insured. Before the end a of the port n closes the terminal channelthesteam can "pass throu hthe latter to the piston outside the barre where sufficient area is exposed to secure the necessary power.

The piston is recessed to receive an e trunnions and the ends of the bearing;

. 7 k these parts 'of'the piston by U-like king-pieces 19, whose ends meet those of the strips5, enter the slots in same, and the bear on the outerfaces of the slde strips 16. The ends of the ,enlargement 1 of the shaft have annular recesses to receive annular 'packings 20, and

pieces 15 16 19 are socketed to recelve springs 23, which carry the strips toward the bearing-faces. As there is no tendency to force these strips inward, the saidsprings are light and there is little effect in increasing friction or Wear. I thus effectually prevent the passage of steam past any of the edges of the piston or of reversing the steam the enlargement 1 of the material.

evenly and regularly and maintain 'tight joints. Tosecurely pack the periphery of the barrel and compensate for wear at this point, I make use at each side of an annular ring or packing 26-, which may be in sections and which has a beveled'or tapering face m, adapted to a like face of the casing, so that by forcing the ring inward the joint may be "packed! and wear compensated for. The packing may be forced inward and secured in any suitable way; but, as shown, setscrews 27 adjustable from the outside of the casing, are used for this purpose. Preferably this ring forms the outside bearings ,of the barrel, as shown; but it might be used on the inside.- This ring 26 is split, and the joint between the sections is opposite the strip 2-, so that leakage at this poin is not It will be evident that if the en ine was reversed (see Fig. 3) any condensed iquid or lubricating-oil would after the piston passed the port 7 be confined in the'contracted recess between the piston and the converging faces of the casing and barrel, which would result in hammering or straining the parts. To prevent this, I provide a channel 40 in the inner wall of the casing extending from at or near the port 7 toward the abutment, and when the piston on the reverse motion moves downward any liquid in the said space will flow upward through the channel and escape.

As shown in Fig. 4, the barrel C is in two sections with a mortise oint 9'. This facilitates construction andt e introduction and securing of the rocking bearing-block E and tends to make it retain its original shape, 111id'er all temperatures. bolted together by suitable cross bolts. (Not shown.)

The pressure of the piston outside of time the piston passesthe inlet-port 7, acting under the volume of steam then admitted until it has traversed about half its stroke. It thereafter begins to uncover the first channel t to permit the steam to be then discharged into he interior of the barrel. Thereafter there is also pressure on the piston area within the barrel until the piston passes the exhaust-port 8, as in Fig. 1 or in the construction shown inFig. 3, until the hub 1 has rotated. to an extent to put the chamber X back of the piston in connection with the port a, as in the position of Fig. 3, when the steam will pass from said chamber through the port 11. to the exhaust.

It will of course be; understood that the full boiler-pressure of the steam may be used throughout the rotation 01'' the lug 12 of the valve device may be shifted to cut off at any is maintained on the full area These sections are the barrel from thepoint of the rotation, the steam acting eX= pansively thereafter.

The recess or depression y in the'casing and the position of the barrel-therein not only secure a greater contact area and better sealing and abutment at this point, but is most important in causing the edge of the piston to occupy a position within or back of the outer face or periphery of the barrel when opposite the packing-strip 2, as shown in Fig. 1, this resulting from the said edge moving in a circle concentric with the-shaft and corresponding to the curved wall of the casing, while the periphery of the barrel projects into the recess y beyond this circle. This prevents the edge of the piston and its sealing strip from making contact with the sealing-strip 2. This is most important, as heretofore in other engines the contact. of the piston and strip 2 has resulted in destroying the latter and impairing the efiiciency of the engine.

As there is a series of channels tthere is no throttling of the steam, the number of uI"I. covered channels increasing as the piston travels and the steam expands.

By providing the inlet-port 7 in the casing so as to admit steam first outside the barrel I avoid introducing superheated steam (when used) at the shaftbearing when running ahead.

To compensate for wear of the rocking bearing E, I in some cases provide the edges thereof with adjustable shims 61, Fig. 11, which can be adjusted to maintain the desired contact of bearing-faces. each shim is a curved wedge-shaped strip secured by bolts 62 to the body of the bearingyand to prevent slippage the contacting faces of the body and shims have parallel interlocking ribs and recesses.

While I herein refer to the use of steam, I do not wish it to be understood that my apparatus is one adapted for such use only, and I wish the term to be understoodas practi-g cally including any suitable vapor or fluid.

In Figs. 12 and 13 I have shown my improved apparatus as used for transmitting motion to a fluid as in pumping. The app'a ratus is of substantially the same construction as the engine shown in Figs. 3 and 4, with the following exceptions: All of the passages for the .fluid are enlarged and where llCO As shown,

necessary the parts are enlarged to accompassages arranged to connect the chambers trio lnside and outside the barrel, and to be successively fully closed and then opened on the passage of the piston.

2. 11 an apparatus'for the conversion of ener y, in combination, a cylinder, an eccenarrel, a shaft, a piston extending from the shaft through the barrel, inlet and outlet ports and a series of passages between the chambers interior and exterior to said barrel arranged radially in respect to the center of the shaft as set forth, whereby the'pressure is applied to only part of the piston area during part of the stroke and is upon the full piston area during another substantial part of the stroke. a 3. In a rotary engine, in combination, a cylinder,'an eccentric barrel, a shaft, a piston extending from the shaft through the barrel, inlet and outlet ports, passages between the chambers interior to and exterior to said barrel arranged radially in respect to-the center of the shaft as set forth whereby the pressure is applied to only part of the piston area dlu'- ing a part of the stroke and is upon the full piston area during another part ofthe stroke and means for cutting off the steam to secure its expansive action upon the full area of the piston.

4. In a rotary engine havin aoylinder, an eccentric barrel, a shaft, an

a piston extending from the shaft through a packedopening of the'barrel, inlet and outlet ports and'channels arranged radially to the center of the shaft as setforth, whereby the pressure is upon only part of the piston area during the first half of its traverse and is uniformly upon the full piston area during another substantial part of the traverse.

5. In a rotary engine having a casing, an eccentric barrel, a shaft and piston extending therefi'om through the barrel, ports communicating with the chambers outside of and within the barrel, channels whereby the steam may pass from one chamber to the other, and means whereby the steam may be admitted directly from the supply to either the port communicating with the outside chamber or that communicating with the inside chamber at any point of the stroke.

6. The combination with the eccentric barrel, a shaft and a piston extending therefrom through the barrel .and having its side edges beveled substantiall as described.

7. The combination in a rotary engine of the casing, having a circular chamber and sides with annular grooves, eccentric barrel extendin into said grooves, tapering packing and earing rings surrounding the periphery of the barrel within the grooves, the inclined faces of the rings adapted to inclined faces of the grooves, and means for moving the rings inward.

i 8. The combination with the casing and eccentric barrel of a rotary engine, of a shaft carrying a piston extending through the barrel and provided with within the barrel, the said enlargement hav-. ing a port in its periphery and a series of passages radial to the shaft through which the steam can pass between the outside chamber and said port, and the casingvhaving an exhaust-port communicating with the chamber within the enlargement.

9. The combination with the casing and eccentric barrel of a rotary engine, of a shaft carrying a piston extending through the barrel and provided with a hollow enlargement within the barrel, the said enlargement have ing a port in its peripher and the casing having channels or passages affording a communication between the chambers within and outside the barrel, and an exhaust-port a hollow enlargement communicating with the chamber within the enlargement.

10. The combination with the casing having inlet and exhaust ports, and'eccentric barrel, of a shaft carrying a piston extending through the barrel and provided with a hollow enlargement or hub within the barrel, and a series of channels 25 affording communi-- cation between the chambers inside and outside of the barrel, the said hub having a port n arranged to afford a cornmunication,between the hub and the chamber outside the barrel until a material area of the piston is exposed Within the barrel.

11. The combination in a rotary engine, of

a casing, eccentricbarrel, shaft, and piston extendingthrough a sealed opening of the barrel, inlet and outlet ports, and passages arranged radially for approximately oneroo 'half of the pistons travel to secure the pressure of the steam on the piston area outside the barrel during a part of the traverse, and a pressure upon the piston area at the same side of the piston both outside of and within the barrel for another part, and only within the barrel for another part of the traverse.

12. The combination in a rotaryengine, of a casing, eccentric barrel, shaft, and piston extendin through a sealed openingof the barrel, in et and exhaust ports, and passages arranged radially for approximately one-half of the pistons travel to secure the pressure of the steam on the piston area in the primary chamber outside of the barrel as the piston passes the inlet-port and during part of the traverse, and only on the piston area within thd barrel during another part of traverse and a pressure outside of and within the barrel for another part of traverse and until the piston passes the inlet and the engine exhausts.

13. The combination with the piston of a rotary engine recessed at the edge, of a packing-strip within the recess provided with pins 18, and L-shaped grooves in the sides of the recesses receiving said pins. j

14. The combination with the shaft and piston of a rotary engine, of an eccentric bar rel consisting of two rings or sections with meeting edges, and a recess formed partly'in each section and a rocking bearing having a recess for the passage of the piston fitted to rock in the recess formed in said sections.

15. In an apparatus for the conversion of energy, in combination, a casing, an eccen tric barrel, a shaft,a piston extending there from throughthe barrel, 'ports communicat ing with the chambers interior and exterior to said barrel and a plurality of channels of communication between the said chambers, the distance between the outer edges of the first and last channels comprehending about one -half the circumference of the barrel,

said channels afranged to secure a working pressure Within the parts of said chambers behind the piston at all points of the stroke. 16. In an apparatus for the conversion of energy, in combination, a casing, an eccentric barrel, a shaft, a piston extending therefrom through the barrel, ports communicating with the chambers exterior to and interior to said barrel and a series of passages between said chambers through which the fluid passes in a direction backwardly inclined to the radii of the barrel.

'17. In an apparatus for the conversion of energy in combination, a casing, an eccentric barrel, a shaft, a piston extending therefrom through the barrel, ports communicating with the chambers exterior to and interior to said barrel, a series of passages between said chambers through which the fluid passes in directions increasingly inclined to the radii of said barrel.

18. In an apparatus for the conversion of energy, in combination, a casing, a shaft concentric with the interior ofsaid casing, an-ec centric circular barrel forming peripheral contact with the interior of said casing, a pi s.

ton carried by the shaft and extending from said shaft through the barrel, a port near said contact for the chamber exterior to said barrel, a port near the shaft for the chamber interior to said barrel and a series of passagesradial to the axis of the shaft connecting sai d chambers and extending substantially from the point of said barrel nearest said shaft to the point of said barrel nearest said casing.

19. In an apparatus for the conversion of ener y, in combination, a cylinder, an eccentric arrel, a shaft, a piston extending from the shaft through the barrel, inlet and outlet ports in. the casing and passages partly in the edges of the barrel and partly in the casing adjacent thereto arranged to permit steam to, pass from the outside to the inside of the barrel. 7

20. In an apparatus for the conversion 0 ener y, in combination, a cylinder, an eccentric arrel, a shaft, a piston with beveled edges extending therefrom through the barrel, a rocker-bearing E between the piston and the barrel, packing-strips therein hearing on the faces of the piston and U-shaped packing-pieces 19 fitting the side edges of the "22. In an apparatus for the conversion ofenergy, in combination, a casin a shaft, an

eccentric barrel the ends of w 'ch abut in,

grooves in the heads of said casing, tapered split rings siuroun'ding said barrel within said grooves and means for adjusting the same; the faces of said rings presented to said barrel being substantially cylindrical.

23. In an apparatus for the conversion of energy, in combination, a cylinder, a shaft, an eccentric barrel forming peripheral contact with the interior of said cylinder, a piston extending from said shaft through said barrel, a series of passages between the chambers exterior and interior to said barrel, a port for said interior chamber, a port in the periphery of said exterior chamber near said barrel contact and a clearance-space, 40, extending from said peripheral port toward said contact. I

24. In an apparatus for the conversion of energy, in combination, a cylinder, a shaft, an eccentric barrel, a piston carried by said shaft and extending through said barrel, ,a hollow boss carried by said shaft and containing ports at its periphery and head and a steam-box 8 with which said head port com municates extending substantially around the shaft.

' 25. In a rotary engine, in combination, a cylinder, a shaft, an eccentric barrel, a piston extending from the shaft throu h the barrel,

passages radial to the axis oftIie shaft con-- unitary valve mechanism whereby the' com nection between said ports and said passages may be reversed.

26. In a rotary engine, in combination, the

cylinder, the shaft, a cylindrical barrel, a piston extending from the shaft through the barrel, passages connecting the chambers interior and exterior to said barrel, ports for said chambers, a valve-chamber, passages leading from said ports to said valve-chamber, a constantly-rotated cut-off-valve member 12, connections whereby the same is rotated by the engine and an intermittentlyosc'illated valve member 10 provided with a by-pass passage around the cut-off.

2 7. In a rotary engine, incombination, the cyllnder, the shaft, a cylindrical barrel, a piston extending from the shaft through the.

barrel, passages connectim the chambers in terior and exterior to said barrel, ports for said chambers, a valve-chamber, passages leading from said ports to said valve-chamber, a constantly-rotated cut-off-valve member 12, connections whereby the same is rotated by the engine and an intermittently oscillated valve member 10 rovided with a by-pass passage around t e cut-0E and means whereby said valve member 10 may be moved to introduce said by-pass passage between the steam-main and either port.

28. In a rotary engine, in combination, a cylinder, an eccentric barrel, a shaft, a iston extending from the shaft through the arrel,

- inlet and outlet ports, passages between the chambers within and without the barrel arranged substantially as set forth whereby the pressure is applied to only part of the piston area durin part of the stroke and is upon substantial y the full piston area during another part of the stroke, means whereby the steam ma be cut off during the stroke and means in ependent of the cut-off whereby the boiler-pressure ma be admitted to the piston at any point of t e stroke.

29. In a rotary engine, in combination, a cylinder, a shaft, an eccentric barrel, a piston extending from said shaft through said barrel, a series of passages radial to the axis-of the shaft connecting the primary and secondary'chambers on opposite sides of said barrel and arranged as set forth whereby the num ber of sai passages transferred to the lowpressure side of said piston in the secondary ,ing a casing, radial piston-barrel an hearing in the barrel for the passage of the 7 piston, of shims adjustable at the edges of the bearing to compensate for wear.

31. The combination with an engine havrocking bearing in the barrel for the passage of the iston, of curved Wedge-like shims and means or connecting them adjustably to the edges of the bearing.

32. The combination of an engine having a casing, radial piston-barrel, and rocking bearing in the barrel for the passage of the piston, of curved wedge-like shims and means for connecting them adjustably to the edges of the bearing, said shims and edges having interlocking ribs.

33. In a device for receiving andtransmitting energy, the combination of a shaft, an eccentrically-located barrel, a piston extendin from said shaft through said barrel, a cylin er with a recess 'y into which the said barrel extends, chambers exterior and interior to said barrel, and a series of passages connectingsaid chambers through which the fluid passesinclined in a direction at angles to the radii of said barrel.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

- EDWIN TAYLOR. 1 Witnesses:

CHARLES E. FOSTER, J. J. MCCARTHY.

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