US873597A - Rotary engine. - Google Patents

Description

PATENTED DEG. 10, 1907. I V. PINGRET.

ROTARY ENGINB.

APPLIGATION PILED MAY 4, 1906.

3 SHEBTS-SHBET 1.

PATENTED DEC. 10, 1907.

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VICTOR PINGRET, OF RIO GRANDE DO SUL, -BRAZIL, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE PINGRET TURBO PISTON ENGINE GO., OF ESCANABA, MICHIGAN, A CORPORATION OF MICHIGAN.

ROTARY ENGINE.

No. s73,597.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed May 4, 1906. Serial No'. 315.210.

To all whom it may concern:

Be it known that I, VICTOR PINGRET, a citizen of the Republic of Brazil, and a resident of Rio Grande do Sul, in the State of Rio Grande do Sul, Brazil, now temporarily residing in l/Vashington, District of Columbia, have invented certain new and useful Inprovements in Rotary Engines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanyng drawings, 'l orining a part of this specification, and to the figures and letters of reference marked thereon.

This invention relates primarily to rotary engines of the concentric piston type and in its general Construction enbodies a cylinder or casing, a rotary piston or piston carrier having abutments thereon adapted to travel through a working chamber in the cylinder or casing and past another abutment journaled in the casing or cylinder and provided with a recess through which the abutments on the piston travel, said rotary abutment in the casing also constituting a portion of the valve mechanism Whereby the adm ission of steam or other elastic fluid is controlled.

The invention consists in certain improvements relating more especially to the construction of the adnission or control mechanism and in the means employed for maintaining steamtight joints.

The invention further consists in certain novel details of Construction and combinations and arrangements of parts all as will be now described and pointed out particularly in the appended clains.

Referrng to the accompanying drawings- Figure 1 is a vertical section through a rotary engine enibodying the present improvements,

arts being shown in elevation and in dotted iines in order that the invention may be more clearly understood. Fig. 2 is a sectional view longitudinal of the drive 'shaft and partly in a plane intersecting the abutment in the cylinder and partly in a vertical plane to show the driving mechanism for the governor together with the eXhaust port. Fig. 3 is a detail sectional view through one of the working chambers of the cylinder with a piston or inovable abutment in elevation. Fig. 4 is an elevation looking at the smaller end of the abutment journaled in the casing or cylinder. Fig. 5 is a section through the abutment in a plane intersecting the recess of the packing for rendering the working' chambers steam tight.

Similar letters of reference in the several figures indicate like parts.

As illustrated, the engine is moimted on a base A having bearings B for a drive sha'ft C, said shaft being usually arranged horizontally and extending through the cylinder D of the engine. Said cylinder D is usually formed in vertical halves to facilitate the construction and is adapted to contain within it a disk like piston or piston carrier E which latter is rigidly affixed to the shaft C in any approved manner. Around its periphery the piston or piston carrier E is provided with abutments which in the present instance are preferably in the form of cylindrical abutments or pistons proper as indicated at G, each being held in a bracket Gr suitahly attached to the piston or carrier E.

The pistons or movable abutments G are adapted to traverse a circular chamber in the casin or cylinder, said charnber being cylindrica in cross section as is best shown in Fig. 3, a portion of the length of said chamber being adapted to form the working chamber, while the remaining portion of said ohamber is provided with spiral ribs g which serve to hold packing rin s in the pistons or abutments G compresse but at the same time permit the steam or elastic fluid to pass freely around the pistons or abutments. The latter portion of the circular chamber may be properly denominated the exhaust chamber, inasmuch as it is open to the eX- haust port H, and when the pistons or abutments move into the same the elastic fluid is free to pass to and out of the eXhaust port.

The working part of the chamber preferably extends on both sides of the abutment I, in order that a working chamber may be provided for Operating the engine in either direction, it being understood, of course, and as will presently appear, that steam or elastic fluid is admitted between the abutment I and the pistons or abutments G after the latter have passed the abutment I with the engine running in either direction, and that the pressure will be continued be:

- tween the abutments until the pistons or that the admission port should beopened` instantly when the ,chamber between 'the two ports has been closed against the escape of steam or pressure and that the capacity should exist ot regulatingthe' admission from a point close to theworking chamber in order that the losses due to thegradual accumulation of pressure in thechamber as well as those due to the existence of` port connections of largecapacity sh all he avoided.

In the present engine, the desired ends are accomplished by providing the rotary abutment I, to which reference has before been made, with arecess or chamberl' for a the' passage of' the movable abutments or pistons, said rotary abutment being also provided-with a steam inlet passage iopening into said chamber I'. The inlet passage i v extends out to the fiat face `of the abutment inposition to register with a portk in adisk or valve K, which latter is journaled in the end of the valve or abutment chamber and is adapted to be moved or adjusted manu-` ally as by a worm L and hand wheel L whereby theport ktmay be turned so as to efiect the admisson at the proper instant or' so as to eflect the proper admission' for runnmg the engine n either direction.

The rotary abutment I is preferably in the form of autapering plug which-may be accurately ground to a seat in the valve or abutment chamber of the cylinder orcasing and it is'held to its place by an adjustable cap 1 between which and the abutment,

- frictionalresistance.

ball bearings 73 may be interposed to reduce portions of the abutment may be provided with screw threads or spiral oil feed-chan- -nels as indicated at i in Fig. 2 for feeding lubricatingamaterial from the -cnds of the abutment towards the center. The abutment may be rotated by gearing from the main shaft, as at 13 and its rate of rotationis such that ,its 'periphery will move at the same speed as the edge of the pistoncarrier E:with which it contacts to make -a steam ti ht joint. It will be understood tha-t the e ge of the said piston carrier is beveled or `inclined to correspond to the b evel 'or inclination of the abutment, thus any wear between the partsmay be taken up by advancing the abutment in the direction of its smaller end.

In addition, the end &73,597

Outside of the valve K is anon-rotary plate M, Figs. 2 and 8, which plate M is provided with two ports m and m one of which is in position to register with the port k in the valve K for Operating the engine in one direction, while the other is in position to register with said port Tr for Operating the engine in the opposite direction. Bearing against the outer face of the plate M is a governor valve N, Figs. 2 and 7, having a port n therein adapted to register withthe ports m and m' in the` plate M, the position of the governor valve N being regulated by automatic governor so as to admit more or less steam in accordance with the speed of the engine. In the preferred Construction, the said governor valve N works in a cylindrical chamber in the head O of the valve casing and is held up to its seat by steam pressure upon its outer face for which purpose the admission pipe P preterably opens through the head O to the outer side of the valve N and the means for controlling the said valve preferably consists of a short section Q, of said pipe, which at its innerend, is flanged and provided with lugs or arms q' adapted to embrace pins `q' on the valve n while its outer end is connected with the pipe P by a steam tight joint and is provided' with a crank arm R, Fig. 1, with which a connecting rod R' is jointed, said connecting rod R being in turn connected with an ordinary centrifugal governor R through an Operating lever R The latter may, if' desired, be provided with a handle R by which the governor controlled valve may be 'reversed when the engine is reversed. The governor may be driven from the main shatt C through bevel gears'S, best 'shown in Fig. 2, and in operation it will move the valve N to vary the port opening in the well understood manner.

To relieve any possible" back pressure which might occur as each piston or abutment G isapproaching the abutment L'supplemental exhaust ports T are provided in proxinity to the abutment I, such exhaust ports T being connected by pipes T (dotted lines Fig. 1), with the main exhaust H. Connected valves t are so arranged in the 'pipes T' that when one is opened, the other is closed, and consequently when the engine is running in one direction the valves should be so moved as to permit the exhausting of pressure behind the abutment I wl1ile the port T in 'front of the abutment is closed against theescape of pressure from the working chamber.

:Located in the cylinder on each side of the piston carrier are packing strips U, such strips being preferably formed with 'flexible ends adapted to lie close to the beveled edges of the piston carrier E as best shown in Figs. 3, 10 and 11. The strips are normally, however, just out of contact with the piston carrier and adapted to be' pressed into contact therewith by the pressure in the working chamber. A number of such strips may 'be provided as shown in Fig. 11, or their flexible ends may be subdivded so as to bend down freely to form steam tight joints at the points mentioned and the brackets G" are recessed or grooved immediately below the pistons or abutments G to form passage ways for the ends of the strips as shown clearly in Figs. 1 and 3. Said strips may be confined in grooves one side of which may be formed by the movable segments U', Fig. 3, and they may be adjusted by adjusting screws V passing through to the outside of the casing adapted to bear against segments or rings V said segments V being especially useful where a series of packing strips U are employed and it is not desired to provide an adjusting screw *for each strip. In their passage through the abutment I, the pistons or movable abutments G have their packing rings confined by ribs /V which latter are preferably formed on curves to conform to the relative movements of the two abutments in passing each other, thus the packing rings on the abutments G will be held. compressed and in proper shape for entering the working chambers as they pass out of the abutments I.

In operation, steam or pressure entering through the pipe P will seat the governor valve N firmly against the plate M and passing through the ports n m will enter the port Ic in the valve K. At the proper instant, or when one of the abutments G has moved through the abutment I and the latter has turned sufiiciently to close the rear end of the working chamber, the porti, in the abutment I will be brought into registry with the port k' and steam will be admitted between the abutments G and I and will e'fl ect the forward movement of the former together with the piston carrier and shaft. Depending upon the position of the valve K, the steam will be cut oti' at the proper instant and when the abutment G reaches the exhaust chamber, the exhaust may take place through said chamber and through the eXhaust port H as will be readily understood. To reverse the engine, it is only necessary to move the valve K into position 'for its port to register with the other one of the ports m or m' as the case may be, when steam will be admitted to turn the shaft in the opposite direction, the governor controlled valve N being also reversed by means of the handle E* as will be readily understood.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is z- 1. In a rotary engine, the combination with the cylinder or casing, the rotary piston carrier and pistons thereon and the rotary abutment ournaled in the casing, having a recess for the passage of the pistons therethrough, and having an inlet port therein, of a manually controlled valve having a port with which the inlet port in the abutment is adapted to register and a governor controlled valve tor regulating the supply of pressure to the manually controlled valve, substantially as described.

2. In a rotary engine, the combination with the cylinder or casing, the rotary piston carrier and pistons thereon and the rotary abutment journaled in the casing having a recess for'the passage of the pistons therethrough and having an inlet port therein opening into said recess, of a valve having a port with which the inlet port in the abutment is adapted to register, .a fixed plate having a port therein with which the port in the valve is adapted to register and a second valve having a port adapted to register with the port in the plate; substantially as (lescribed.

3. In a rotary engine, the combination with the cylinder or casing, the rotary piston carrier and pistons thereon and the rotary abutment of frusto-conical formjournaled in the casing and having the recess for the passage of the pistons therethrough and the inlet passage extending from said recess to the end face of the abutment, of the disk valve against which said end face of the abutment seatS, said valve having a port therein with which the inlet in the abutment is adapted to register, means for moving said valve independently of the abutment and a fixed plate having a plurality of ports therein with which the port in the valve is adapted to register substantially as described.

4. In a rotary engine, the combination with the cylinder and casing, the rotary piston carrier and pistons thereon and the rotary abutment journaled in the casing and having a recess for the passage of the pistons therethrough and the inlet passage extending from said recess to one end face of the abutment of a disk valve interposed between the end of the abutment and end of its chamber and having a port therein with which the inlet passage in the abutment is adapted to register and means for adjusting the abutment longitudinally towards the valve substantially as described.

5. In a rotary engine, the combination with the cylinder and casing, the rotary piston carrier and pistons thereon and the rotary trusto conical abutment journaled in the casing and having a recess for the passage of the pistons therethrough and the inlet passage eXtending from the recess to the smaller end face of the abutment, of a disk valve interposed between the end of the abutment and end of its chamber and having a port therein with which the inlet passage in the abutment is adapted to register and means for adjusting the abutment longitudinally toward the valve; substantially as described.

6. In a rotary ,engine the coinbination With the casing, rotary piston carrier and pistons thereon and the rotary abutrnent journaled in the casng and having the recess for the passage of the pistons therethrough and an inlet passage leading froni the end of the abutnent, of an inlet pipe, a disk valve arranged axially of the ahutnient and connected With the end of the inlet pipe to be turned thereby suhstantialiy as described.

7. In a rotary engine, the combination With the casing, rotary pisten carrier and pistons thereon and the rotary abutrnent journaled in the casing and having the recess for the passage of the pistons therethrough and an iniet passage leading froni the recess to the end of the abutnent, of a disk valve at the end of the abutment, a fixed plate against Whi'ch the valve seats, a second disk valve, an inlet pipe having a novable end section and connections between said movable end section and second valve Whereby the said valve may be turned; substantially as described.

8. In a rotary engine, the oornbination With the rotary piston carrier and substantially cylindrical pistons thereon, of the casing having the pisten chamher of cylindrical form in cross section and an eXhaust chamber With internal spiral ribs, a rotary abutment bridging the piston chamber and hav-` ing a recess therein for the passage of the pistons through the abutment, said abutrnent having an inlet passage therein and a valve separate from the abutment for controlling the adnission of pressure through the abut ment; substantially as described.

9. In a rotary engine, the conbination With the cylinder or casing and the concentric piston carrier having pistons thereon, of packng strips held in the easing and having fiexible edges overiapping the edges of the pisten carrier and forning a tight joint With the pistons; substantialiy as described.

10. In a rotary engine, the combination With the cyiinder or casi-ng and the concentric pisten carrier having pistons thereon and grooves adjacent said pistons, of packing strips held in the casing and .having flexible edges overlapping the edges of the piston carrier and ad apted to pass through said grooves; substantally as described.

11. In a rotary engine, the conbination With the cylinder or casing and the concentric pisten carrier having pistons thereon, of diagonally arranged packing strips having flexible edges projecting over the edges of the pisten carrier and adapted to be noved into v contact thereWith by pressure in the cylinder;

VICTOB PINGRET.

Witnesses:

ALEXANDER S. STEUART, THoMAs DURANT.

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