US625950A - haddock - Google Patents

Description

No. 625,950. Pafcnted May 30, I899.

' W. HADDOGK.

ROTARY ENGINE.

(Application filed June 1, 1898.)

(No Model.) 5 Sheets8heet I.

WITNESS INVENTOI? %m&%%

BY Y

4 TTOHNEX Patented May 30, I899. W. HADDOCK.

RGTABY ENGINE.

(Application flled l'une 1, 1898.)

5 Sheets-Sheet 2.

(No Model.)

WIN/588% 55.50%

No. 625,950. Patented may 30, I899.

w.' HAI JDOBK. ROTARY ENGINE.

(Application filed Jzine 1, 1898.)

(No Model.) 5 Sheets- Shoat a.

' ,EEHMUUUU v 'I WITNESS INVENTU/i' A TTORNEY No; 25,950. Patented May 30, I899.

- w. HADDOCK.

ROTARY ENGINE.

' (Appligation filed June 1, 1898.) (No Model.) 5 SheetsSheet 4.

WITNESS mmnm? I W ATTORNEY No. 625,950. Patented May 30, I899.

W. HADDOCK.

ROTARY ENGINE.

(Application filed June 1, 1 898.

5 Sheets-Sheet 5.

No Model.)

Will/l I J M To wZZwhom it may concern:-

' gines, of which the following-is e; specifics- WORCESTER HADDOCK, OF CINCINNATI, OHIO, ASSIGNOR OF THREE-FIFTHS TO HERMAN E. BLAIR. OF SAME PLACE ROTARY ENGlNE.

8? "l." GA'HON forming part of Letters Patent No. 825,950, dated flay". 80; 21.8 99.

Application filed June 1.

Be it known-that hwosons'rnnflnenoex, a. citizen of the United States, ands. resident of theeity of Cincinnati, inthe county of Ham'- ilton and State of Gino, have invented certein new'end useful Improvements in Rotary Ention.

The several features of myjinvehtionand thejvn'rious advantages resulting from their. nseconjointly or otherwise will be apparent *iromthefollowing description and claims.

- .In' the accompanying drawings; making a, part of. this .speeificntionflligure 1, Sheet 1,is an elevationof the front of the engine'andfl showing the com. for operating the valve.B

and also showing mechanism for reversing-the valve and th-ns' reversing theen'gine. Fig.

:2, Sheet-2,represents an elevation of the rear of the' engine and the mechanism for operating-thevnlve E. Fig. 3,Sheet '3,'isanelevation of a) vertical central cross-section taken in the planeof the dotted line 3 3 of Fig. 4,

that face ofithesection being seenwhich faces toward the front. Fig. 4-, Sheet 4, shows a. verti'cel centi el section taken inthe plane of the dotted'line 4 lief Fig.1, thntfaee of the section being. seen which faces toward the-right in Fig. 1. v Fig. 5 is a view on e sealeless than that upon which Figs. 1 to 4 are made. Fig. 5 is a. view of a portion of. the innerside of that part oft-he engine which lies to the left of the plane of the dotted line 5 5 of'Fig. 4.

Fig. 6 is a'viewofithe means for rendering the valve or stopplewhiehelastically closes the exit for steam from the steam-cushion more or less yielding, as desired. This figure is onnn enlarged scale; Fig. 7 isba view in perspective of the upper-Tend of the cam-rod and of the hitch combined therewith for hooking (locking) together the rocking device and the cam-rod. Fig. Sis a, sectional viewofthe abutment-valve on a; scale somewhat larger than that of Figs. 1 to 4. "*Fig. 9, Sheet 5, represents aside elevation of thevalve' E; Fig.

10 is a. detailed view of one of the sets of wrist,

collar, and stud for enabling the adjacent arm of the rockingdevice to'he securely fesienedto the cam-rod.

I will now proceed to'specify my invention in detail.

inafte r apparent.

1898. Serial Eo. 682,298. (Remodel-l I will firstdescribe the interior parts of my engine. In connection with theinlet steampipe for'delivering steam to the engine there .is (in the cylinder or casing of the engine) the inlet-port A, preferably preceded by s. chamher A ,'whose bottom psrts' eonverge down-- ward to the port A. Next the port A is the recjefving, cut-off, and reversing vslveB, ro-, tateble in its closely-fitting chamber B in the cylinder or casing of the engine- T is valve B is fixed on its rota'tebleshnft B This valve is not moved more then a. short portion of the are of-a. revolution, as'will hesoon here- This valve has two ports pessing thron-ghit-Vin, RC and L0 The cylinder'orcnsing below has two-stationery ports El) and Ll), andthe ports oi. the valve B are err-an ged substantially as shown, so that when the upper end of the inlet-portLC conneets with the inlet-port Ath'e lower end of the port LC will be in connection with the np-. per end of the port Ll); ni'id'vwhen.theupper end of the inlelephrtfBC connects with the inlet-port Athe lower end of this port RC will be in connectionwith the upper end of the port RD. Below theports LD and RD is'the abutment receiving valve 12', adapted to oscillate tion of this abutmentvalve E the upper part 1 with and 'hy'its shaft E T In the workihg poi has-a. convexly-cnrved ,fece E, which-bears against the concavely-eurved'fscel) of the cylinder or casin g. The bottom portion of this valve has a. long recess E, boundedat each end by a. wing'E of the valve. Each of these win gsis preferably formed, as sho wn,'between flanges X at ends of the valve 51nd consists of a.

downward portion E and 'a. horizontal portion E, the letter turning outward from the vertical line of the valve. The outer ends ofench of these wings are curved to accommodate them;-

selves to the adjacent curved s'nrfaceof the;

"valve-chamber U, wherein this vslve'works- There are in this valve speces hl E"; respectively located on opposite sidesjof the-valve gine end-of the abntrnentwelve :This' Y valve is provided withtwcmiving-porte E and arranged above their respective adje- RH and'LH, running through it from bottom to top. This valve may be solid except at its ports or be lightened by three chambers E cast orotherwise formed therein.

Theengine has a cylinder L. Within the latter is a rotary piston J, having a pistonabutment J The piston is concentric with the cylinder except at the abutment J. Between the cylinder and the piston is the steamspace K. The piston-abutment is provided with suitable packing. A preferred description of such packing and its modeof combiby'a spring or springs J located in a recess J below the recess J but extending up into the latter recess and pressing against theine ner edge of the packing J. A suitable adj ustabl'e stop or steps prevent the spring from pushing the packing out beyond the point required for its impingement on the surface of t'he'cylinder. The ports RH and LH of the abutment-valve E are arranged substantiall y as shown, so that when the upper end of the portLI-I is in connection with the lower end of port RD the foot'E of the left-hand wing E rests upon the peripheryof .the rotary piston J and the left-hand passage E of valve E is in connection withthe steam-space K around the piston J and within the cylinder L and in front of the piston-abutment J and, on the other hand, when the upper end of the port RH is in connection with the lower end of the port RD the foot E of the right-hand wing E .rests upon the periphery of the rotary piston J and the right-hand passage-space E" of the valve E is in connectionwiththe steamresting-pointgfrom seating'hard on the periphcry. of the piston, and thus wearing the parts 'fasterthanthey would otherwise be worn, I provide cushioning devices, and the preferred description-thereof, also of my invention, is as follows I provide the valve E on each side with a wing orflange E forming on each side in connection with the, valve-box a chamher-E varying in size as the valve E moves. At the upper end of the chamber E on the lefthand .is located an escape-opening for the compressed steam when the pressure of the latter becomes too vgreat. This. escape is through an opening F in the inner face of the 'ter between it and the valve.

cylinder-head L, communicating with an oblique passage F of the latter, in turn connecting witli the exhaust G, substantially as indicated.- This passage Firs preferably present as agroove in the inner side of the cylinder-heads, that is, valve-cover, which is next to the opening F. The opening F is closed by a valve F. When the steam-pressurein chamber E becomes too great, it

'presses back the valve F and finds exit through the passage E into the exhaust. The degree of pressure with which the valve F bears upon its valve seat is duly regulated by means of a screw 1?", screwed into the boss on the cylinder-head and bearing against the innor end of the screw and compressing the lat- A stem F is fixed to the valve F. There is a collar F" on the valve F and stem F, which collar prevents the valve under pressure of spring F from advancing in to the cushion-chamber of valve E. This stem operates as a guide to keep the valve F in place and to retain the spring in place on the valve-collar. F engages a screw-thread in the boss aforementioned, and against this screw the outer end of this spring. F rests. Advancing the screw toward and against the spring F increases the pressure of this spring upon the valve Fiend requires greater pressure of the compressed steam to open the valve F for enabling the steam to exhaust through passage F and on into the exhaust-opening G and 'for enabling the valve E to come more gently to its seat;

It will beunderstood that a construction similar-to that of the parts F, F F, F, F, and F already described, is present at the other side of the cylinder and is there ellicient in.providing, in combination with the adjacent chamber E of valve E, a cushioning device to prevent the valve E from seating itself too hard when its rightor hand 'wing is being seated on the periphery of the piston.

Steam to act as a cushion in that chamber E which must necessarily be the one to ease the descent of the wing next to be seated, is admitted to that chamber through a branch port-B, leading from the adjacent receivingport LH or RH, as the case may be, to the adjacent chamber E It matters not, therefore, which wing of the valve is being seated there is a cushioning device present which prevents that wing from seating hard.

The description has now advanced sufficientlyfa'r to describe in a connected manner the mode in which these interior parts operate and coact. Such operation is as follows: The "alve B- is first turned so as to ca'use the engine to rotate in the desired direction. Thus when the piston is to rotate in the difrection of the arrow Z the valve E takes the position shown in Fig. 3. Thevalve I having the'position shown in this figure, stean.

coming in through the inletport A passes through port LC, thence through port LD,

A screw abutment J on the piston.

and then throughgport LH, and entering steam-space K of cylinder L courses to the right and then down around the piston, and the abutment J 2 pushes it forward in the direction indicated by the arrow Z. It will be understood that the steam acts between the left-hand wing E? as an abutment, temporarily stationary, on the one hand, and the When the piston is approaching the valve E, the adjacent incline flanges J preceding the piston-abutment, gradually lift the lefthand wing E of the 'valve E, so that the right-hand wing-E of the valve seats upon the periphery of the piston. Steam is now cut off from the valve E and steam-space K, and the right-hand space E is connected with steamspace K, (behind or to the leftof the piston,)

' and the steam in the latter is exhausted therefrom iutothe adjacent exhaust G. Themomentum of the piston carries its abutmentJ under the uplifted left-hand win g of the valve E. The incline J" in front -of the still rotating piston now lifts the right-hand wing of the valve and returns the left hand to its first position. By this time the piston-abutment is passing under the right-hand wing, of the valve and steam enters the steam-space K betweenthe abutment of valve E and right:

hand piston-abutment and again presses. it forward in the direction it is still moving. The space K (in front of the piston-abutment) is in communication through the left-exhaust space E" with the left exhaust G. Thus by a to that in which it heretofore ran.

repetition of these movements the piston is kept rotating'as-long as s pplied with steam. No' matter how quickly thewalve E is moved the air-cushions in chambers E E aforede- .scribed prevent its wings from seating hard the periphery of the piston.

It will be observed that when valve E is on a horizontal center each wing thereof is at an equal distance from the periphery or face of the piston and there is an exhaust-opening on each side of the valve .;E, which leads alteruately from space K through exhaust-passages E to exhaust G, thus relieving the space K of all undue pressure. While the valve E is horizontal there is no. pressure in steam RH of the valve E. The piston will thenobviously be driven in a direction the opposite The operations will be conducted upon the same principle as heretofore specified, except that the position of those parts which are reversible will be reversed.

The aforedescribcd mechanism will move with great facility and ease. ance of the parts is :such that the engine will not only run with the mechanism aforede- The perfect bal-.

means of the valve B-only.

In order to easily reverse the valve B and. make steam-port connections and enable it' to operate, I provide mechanism, also of my invention, and apply the same to the exterior of the engine, preferably as shown in Sheetl, namely: M indicates a rocking device or lever fixedto a shaft M. The latter passes through and is fixed to valve B and at M is journaled, preferably, in the extensions on the cylinderheads, as shown in Fig. 4. To this shaft is fixed the lever and valve B, by which the valve is moved. I I

The device M has arms RM and LM, each provided with a handle RMH and LMH. The rocking device may be operated by these handles. Each arm has awrist M, (shown by solid lines in Fig. 10,) which terminates in an annular flange M5, and beyond the latter is a second projection or stud M.

A cam-rod N, with adjustable yoke N, surrounding an eccentric N is fixed on the shaft P-viz., the shaft of the rotary piston -com centric with the latter and turned thereby. Rotation ofthe piston:through the medium of the eccentric N thus imparts to the camrod a reciprocatory movementin the direction of the length of the latter. The cam-rod is provided at its upper end with a handle N 1 for, moving it laterally from one end of the. rocking deviceM to the other end. It is fur:

ther provided on each side with a recess N (shown by dotted lines in Fig. 1 and solid lines in Fig. 7) to receive one of the wrists M of the rocking device M. The'cam-rod is provided with a suitable device for locking it to either wrist of the lever or rocking device. A desirable device of this kind is shown and is as follows: A latch-piece N is pivoted at N to the cam-rod N and has a handle N. The lower part of the latch-piece N is pressed toward the cam-rod handle forpurposes now to be mentioned by a spring, as N The lower portion of the latch has two openings N N each of a size capable of re eiving one of the studs M of the wrists. Th lower portion of the latch has also another opening N adapted to receivea stud N fixed in the cam-rod. The object of this last-meutioned construction'is to enable the stud N to steady the latch and obviate a twisting strain upon the latter and to take part of the strain off of the pivot or hinge N I As heretofore mentioned, the rocking. device can "be worked by means of either or both of its handles; butit can also be operated to re 'erse the valve B by means of thecam-rod lower end with the slot M there being the sweeps M M on each side of the slot M .These sweeps are in curves described from the proper centers, so as to allow the roller on pin N to travel on the sweeps, while the cam-rod and the rocking device are hooked together and in motion. This slot M is for the reception of the pin N of the cam-rod N.

By unlocking the cam-rod N from'the wrist to which it may be locked and moving the cam-rod back and forth, as desired, the valve B is reversed.

To enable the valve E to be reversedalso when the valve B is reversed, I provide the device M with the studs M and I aiiix to the shaft E of the valve E a rock-arm E, whose upper free end lies between these studs M Oscillation of the rocking device M or of the rock-shaftN in reversing valve B also reverses valve E. The cam-rod N also performs an additional function-viz., it operates as moved by the eccentric N to make the valve B cut oil. steam at a given and desired periodin the revolution of the piston.

As at present arranged the eccentric, as

shown, operates to cause the valve B to receive steam and transmit it by valve E to the steam-space K and later to cut off steam when the piston has made about two-thirds of its revolution from where it received steam.

first mentioned.

The exterior mechanism for moving the abutment-valve E is substantially as follows: On the driven or driving shaft P of the piston is fixed a cam Q. Above the cam are two rollers R and B. Each roller is pivoted to a slide-piece S, slidingin its own guide T, fixed tothe cylinder-head of the engine. Each of the slides has a toothed rack S, engaging 'toothed arms S after the manner of sections of a pinion, and these arms are fixed on the shaft E of the valve E. The operating point or nose Q of the cam Q preferably coincides in shape and position with the position of the piston nose or abutment J within the cylinder. Thus the nose of the cam and the piston-abutment lie in substantially same plane, this plane being transverse to the planes in which thepiston is moving. As the piston revolves indirection of the arrow the cam Q lifts the right-hand roller R ofFig. 2, which latter moves the free or idle side of right-hand arm S upward andtu rns the shaft E thus lifting that side or wing of the valve E which (in Fig. 3) is on the left-hand and depressing the right-hand wing thereof and also depressing the roller R, which is on the left hand in Fig. 2. The valve remains thus while the piston-abutment is passing under the left wing and center of the 'valve E, and then the nose Q of the cam raises the lefthand roller R of Fig. 2 and the right-hand wing of the valveE of Fig. 3 and correspondingly depresses the left-hand wing of valve E of Fig. 3 and the right-hand roller of Fig. 2, thus allowing the piston-abutment to pass altogether from under the valve E and seat- The action of the valve and of the functions it performs being the same as those already described in the aforespecified ope ation of the interior flanges or inclines J 7 J adjacent to the piston-abutment, further description thereof here is deemed unnecessary.

The object and function of the outside cam Q are to relieve wear on inclines J and prevent through wear of these inclines J 7 the abutment J 2 from coming at any time in contact with valve 'E and also preventing any irregular wear on valve E except that which is caused by the piston while in contact with the latter as the piston revolves.

When the valves are reversed, the action of the cam Q isin principle the same, although its movement is reversed, and causes the valve E to act in causing the steam to propel the piston in the opposite direction.

The valve E is so formed that while it is upon its horizontal center it balances without tendency to turn down toward either side; but as soon as it has been seated on one side or the other the pressure of steam contributes to retain it in that position until it is forcibly moved, either by human agency or the valvereversing mechanism of the engine.

The reasons for the facts just stated are as follows: When the valve is placed-horizontally, any pressure of steam in the cylinder is communicated to the entire bottom face of the valve. \Vhen the valve is thrown to the left and occupies the position shown in Fig. 3, the steam cannot press against the bottom of the portion or foot E of the left wing of the valve, because it is in contact with the face-of the piston; but it can press on the mid portion of the bott0m-viz. ,that portion which lies between the left and right wings-and as the larger part of this middle portion E is now to the right of a vertical plane or center passing through the axial center of the valve, as indicated by the dotted line Y Y, the extra pressure of steam contributes to keep the right-hand wing of the valve uplifted. Furthermore, the uplifted bottom or face E of the right-hand wing is subject to the pressure of steam, while the steam cannot reach the bottom of the left-hand wing now resting on the face or periphery of the piston. Therefore the steam contributes pressure against the bottom of the right-hand wing, also to keep the same uplifted. Thus that amount of area (in inches) of surface of the valve which is on the right-hand side of the vertical axial plane of the valve in excess of that which is on the left-hand side of said vertical plane multiplied by the pressure of the steam per square inch will be the force which the steam in the cylinder exerts to keep the valve in the position named and by the aid of that wing which is seated on the face of the piston cause a steam-abutment to be present in space K. When the position of the val ve has means of the interior incline J been reversed, the pressure of the steam ad mitted to the space K will in like manner and with like force operate to keep the left-handwiug of the valve uplifted.

In Fig. 8 I have shown a diagram "in connection with valve E which quite clearly illustrates the aforedescribed changesin the comparative-amount of surface exposed to steam-pressureon opposite sides of the valve I when-the latter is raised or lowered on one side or the other of its central position as compared with the amount of surface exposed on each side when the valve is on its center. In this Fig. 8 the position of the valve when lowered on the right and seated on the sur-- face of the lines. dicate the diiferences in area aforementioned. This illustration of the differences in area piston is d [11 y indicated'by dotted when the valve is seated .on its right wing obtains in like manner (but on the opposite side of the valve) when the valve is seated on its left wing. p

As before remarked in relation to the cut ting oifof steam from the steam-space K by and valve'E or by the outer eccentric N and valve B, .the steam is cut off after the piston has accomplished two-thirds of its revolution thereof. During one-half of this one-third--viz., onesixth-of a revolution of the piston the steam has opportunity to act by expansion, and then during the remaining one-sixth of therevolution exhausting thesteam is from one or both sides of the valve E, and the momentum of the revolving portions of the piston carries the piston-abutment past the valveE and changes the latter, so that it forms an abutment and admits steam, behind the piston abutment and again ilnpels the piston forward.

The piston by its inclines J 7 and without" any of the exterior mechanism for operating the valve E will operate this valve E in the same manner as does the exterior mechanism when present. In such case no expansion of the steam in space K will be employed to operate the piston, it being understood that the ports which convey steam to valve E will in' such case remain open. This latter operation can be accomplished as followsz- The cam-rod l l is disconnected from'thelever orrocking device, so that it (the cam-rod) shall 7 not work the lever or rocking device. The valve B is then set to take steam all of the time. The valve E will be operated as before mentioned and without the valve B acting as a cut-off. Thus the cylinder-space K will take steam for five-sixtbs of the revolution of the piston, at which time the valve E will be moved and cuts off the steam, and exhaustion of thelive steal in the steam-space K will take place.

By approximating the seating-surfaces E of the valve E the amount of momentum nec-- essary to carry the piston past the valve E will be correspondingly diminished and the live steam act onv the piston-abutment for a ted lines in Fig. 3. The packing is pressed So, also, dotted lines are present to intwo or more of such valves, asB and E, with heir necessary accompaniments, to an engine, as I find desirable.

It will be understood that a packing is pres: out between the inner sides of the cylinderheads and the cylinder. A suitable packing V is shown in solid lines in Fig. 4 and in dotagainst the inner face of thecylinder-heads by spiral springs V (Shown'in dotted lines ihTF-ig'. 4.) A drain-pipe W, closed by a suitable cdk'W- ,'can be operatedso as to dis charge from the cylinder the-water resulting from condensed steam.

What-I claim as new and of my invention, and desire to secure by Letters Patent, is-

1. In a rotary engine, having a rotary piston, and,;piston'-'abutment, and a valve E adapted to oscillate, andhavingports LH and RH, and wings E; E, on its lower side, near the outer edges of the valve, a space K being present below the middle of the valve and between the wings, each wing having a portion whose bottom is a seat for closely impinging at the proper occasion on the rotary piston, and the side df-the wingbeing-adapted to be received and fit closely against the adjacent wall of the valve-chamber, the said ports LH and RH having their outlets between the abutments E E of the wings ,E, Ehnd port-s LD and RD,.for respectivelydnlet-ting steam to the ports LH and RH of the valve, -according as the valve is turned, substantially as 105 and for thepurposes specified.

2. In a rotary engine, having a rotary piston, and piston-abutment, and a valve E adapted to oscillate, and having ports LH and RH, and wings E,-E, on its lower side, near the outer edges of the valve, a space K being present below the middle of the valve and between the wings, each wing having a portion whose bottom is a seat for closely impinging at the proper'occasion, onthe face of the rotary piston, and the side of the wing being adapted to be received and fit closely against the adjacent wall of the valve-chamber, and ports LD and RD, for respectively inlettingsteam to the ports LH and RH of the valve, according as the valve is turned, a space E .above face-line of eachwing E being connected to the exhaust, andarranged as described, so that when a given wing of the valve is seated on the piston, the space E" on that side of the valve connects the steam-space K with the exhaust, and when the valve is balanced, bothspaces E connect with the steamspace and with the exhaust, substantially as and for the purposes specified. I

3. In a rotary engine, havinga rotary piston, and piston-abutment, and a valve E adapted to oscillate, and having-ports HI and RH, and wings E", E on its lower side, near a cameo the outer edges of the valve, a-space K being present below the middle of the valveand between the wings, each wing having a portion whose bottom is a seat for closely impinging at the proper occasion, on the rotary piston, and the edge or seating-face of the wing being adapted to be received and fit closely against the adjacent wall of the valve-chamber, and ports LD and RD, for respectively inletting steam to the portsLH and RH of the valve, according as the valve is turned, and spaces orcompartments E formed by the partsE of the valve, and the cushioningchamber of varying size as the valve is moved, and a passage F closed by a spring-valve F and connected through a succeeding passage F with the exhaust, substantially as and for the purposes specified.

4. In a rotary engine, having a rotary piston, and piston -abutment, and a valve E adapted to oscillate, and having ports LH and RH, and wings E, E, on its lower'side, near the outer edges of the valve, a space K being present below the middle of the valve and between the wings, each wing having a portion whose bottom is a seat for closely impinging at the proper occasion, on the'rotary piston,

and theside of the wing being adapted to be received and fit closely against the adjacent wall of the valve-chamber, and ports LD and RD, for respectively inlett'ing steam to the ports LH and RH of the valve, according as the valve is turned, a space E above each wing E being connected to the exhaust, and arranged as described, so that when a given wing of the valve is seated on the piston, the space E on that side of the valve connects the steam-space K with the exhaust,and when the valve is balanced, both spaces E? connect with the ,steam-space and with the exhaust, and spaces or compartments'E formed by the parts ,E of the valve and the valve-cushioning chamber, of varying size as the valve is moved, and a passage F, closed by a springvalve F and connected through a succeeding passage with the exhaust, substantially as and for the purposes specified.

5; In a rotary engine,having a rotary piston, and piston-abutment, and a valve E adapted to oscillate, and having port-s LH and RH, and wings E, E, on its lower side, near the outer edges of the valve, a space K being present below the middle of the'valve and between the wings, each wing having a portion whose bottom is a seat for closely impinging at the proper occasion, on the rotary piston, and the side of the wing being adapted to be received and fit closely against the adjacent wall of the valve-chamber, and ports LD and RD, for respectively inletting steam to the ports LH and RH of the Valve, according as the valve is turned, a space E above each wing E being connected to the eihaust, and arranged as described, so that when a given wing of the valve is seated on the piston, the space E on that side of the valve connects the steam-space K with the exhaust, and when the valve is balanced, both spaces E connect with the steam-space and with the exhaust, and spaces or compartments El formed by the parts Eof the valve, and the valve-chamber, and of varying size as the valve is moved,

. and a passage F closed by a spring-valve F,

and connected to a passage formed in the face of the adjacent cylinder and walled in by the solid end of the valve, and continued across the engine and into the exhaustorifice at the opposite side of the engine from where the said air-cushion apartment is located, substantially as and for the purposes specified.

6. In a rotary engine, an oscillating abutmerit-valve E having wings for impingement on the rotary piston, and a space between said wings and below the middle of said valve, and the piston-abutment having the inclines J respectively on the front and rear side for operating the valve, and inlet-ports, and exhaust-ports of the valve located on the outer sides of the wings, substantially as and. for the purposes specified.

7. In a rotary engine, an oscillating abutment-valve E having wings for impingementou the rotary piston,-and a space between said wings and below the middle of said valve, and the exterior cam rotated with the piston, and

the slidable arms adapted to be both operated.

successively, or alternately, by the cam at each revolution of the latter, and provided with projections engaging oscillating arms connected to the stem or shaft of the valve, substantially as and for the purposes specified.

8. In a rotary engine having an oscillatory valve for conveying steam to the principal valve, and for changing the direction of the steam, and for cutting oflf steam, and having the two ports, an oscillating or rocking device having the arms RM and LM, having handles, substantially as and for the purposes specified.

9. In a rotary engine having an oscillatory valve, for cutting offsteam, and for changing the direction of the latter, an cscillatin g rocking device having arms RM and LM, each provided with a projection M, and a minor projection M therefrom, and a cam-rod provided with the recesses N, and the latchlever pivoted to the cam-rod, and having the openings for engaging respectively the projections M of the rocking device, as presented, and while the projection M is in its adjacent recess N, the latch-lever being caused to lock thus, by elastic means, substantially as and for the purposes specified.

" 10. In a rotary engine having an oscillatory valve, for cutting off steam, and for changing the direction of the latter, an oscillating rocking device having arms RM and LM, each provided with a. projection M, and a minor projection M therefrom, and a earn-rod provided with the recesses N, and the latch-lever pivoted to the cam-rod, and'haviiig the openings for engaging respectively the projections M of the rocking device, as presented, and while the projection M is in its ad jacent recess N the latchrl ever being eaused to lock thus, by elastic means, there being a disk or ann'ularj flange M between the projection'sM" and M, which flange isadapted to keep-the cam-rod from lifting directly for-' ward and off from con-nectionwith projection M", while the-latch-ljever also prevents the projection M from. moving sidewise out of the recess, s'uhstantiallyas and for the.pur-' poses specified. I

. "11. In a'rotary engine having an oscillatory valve, for'cuttin g otf. steam-and for changing the direction of the latter, an oscillating rock-, ing device having arms RM and-LM, each provided with a projection M, and a minor projection M therefrom-and acam-rod pro-z vided withthe recesses N, and the latch-le-- ver pivoted to the cam-rod, and, having the;

openings for engaging respectively the projections M of the rocking device; as primaril ed, and while the' 'projection Mi is in its ad--- jacent recess Nlthe latch-leverbeingcaused to lock thus, by lastic means', and the.-rock*-- ing device providedwitlfiextcnsion M, having studs M and the valverocki'n'g armpig oted on shaft, and adapted to'engage. th

studs M according :to the positionof the:

purposes specified. I s .7 .7

12. In a rotaryengine naving an oscillatory valve, for cutting 0E steam, and for changing rocking device, substantially as and fort-hethe direction of the latter anoscillating' rocking device having arm's RM and LM', each provided with a projection M, and a minorfl projection M therefrom,"and'a cam-rod pro vided with the recesses N, and the" latchslever pivoted to the cam-rod, and having the? openings for engaging respectively the pm- =jections-M of the rocking device,;as presenttially as and for the purposes-'-specifi'ed.v

ed,'and while the projection, M is in its ad- 40 1 {recent recessN, the latch-lever being caused to lock thus,'by elastic means, and the rocking device provided with'ex'tension M having studs M and with anotch in its. lower end ands'weeps,thecam-rod having pin adapted to "engage in said notch, as the cam-rod. os-

cill'ates,"and therockingarm of valve vE, adapted toe'ngage the studs M accordingto the position of the rocking" device, substan- 5o -4 -13. In arctaryenginm'havingm oscillatory valve for conveying steanito the "principal. valve,- .-and for changing-thedirection of the steam, and for cutting oi! steam, and having the two ports,-an floscillating 91:Jrcoki'ng de- 55 vice having-the arms RM and Llliififiovidedr ,with handles, for operating thefirst-named] valve, eccentric. N and the pusherod engaging the rocking device, andthe exterior mechanism fon-operatinglthe; abutment-valve E,

viz: must-an, R, filide-piecess carrying the rollers-guides T, T,-a-nd toothed racks on .the- 'sliile pieces, toothed arms fixed 'on shaft E of theahutm'ent-valvemand the'cam Q, Q, subtantiaily as and for the purposes specified. 65

ijlg. In arotary" engine, the rotary-piston,

abutment valvw exterior mechanism fol-opcrating this valve-"viz; cam Q, Q, slide- ..'-pieces' 8 provided-with device for. receiving .thefimgingement of the nose of the-cam, guides T, andtoothed racks. on the slidepieces, toothed arms engaging said racks, and ffiziedion shaf-tE of the abutment-valve, substantially as and for the purposes specified.

l WORCESTER HADDOCK.-

' ttest: Y

Wm Join as,

a K.SMITH.

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