US920976A - Rotary engine. - Google Patents

Description

- W. s. MINORI ROTARY ENGINE.

APPLICATION FILED NOV. 14, 1908.

920,976. Patenteamaiyn, 1909.

y 2 SHEETS-'SHEET W. s. MINOR. ROTARY ENGINE.

APPLICATION FILED NOV. 14, 1908. I

Patented May 11, 1909.

2 SHEETS-SHEET'Z.

. I i I T A inves/toa -set forth in Patent No. 900,410

WALTER S. MINOR, 0F CUNNINGHAM, TENNESSEE.

No. 920,976. Specification of arverne.

Letters Patent. Patented May 1i, i968.

Application led November lll, 52%. Serial No. ai.

To all whom 'it may concerm.

Bc it known that I, WALTER S. Mines, a citizen of the United States, residing at Cnnningharn, in the county of Montgomery and State of tennessee have invented certain new and useful Improvements in Rotary Engines, of which the following is a specifica-4 tion, reference being had to the accompanying drawings.

lThis invention relates to improvements in rotary engines and more particularly the one granted to me on October 6, 1908.

The object of the present invention improve and simplify the construction. operation of rotary engines of this character.` and to render the same less expensive and more durable in construction, lighter running and more economical in use, self lubricating and also reversible.

With the above and other objects in View,

the invention consists ofthe novel features of construction and the combination and arn ran ement `of arts hereinafter fully descri ed and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a vertical transverse section through the improved rotary engine; Fig. 2 is a vertical longitudinal section; 3 is an elevation of the inner face of one o'f the removable end the cylinder; ig. 4 is an enlarged sectional View showing the roller and roller bearing for one oi' the guiding pins of the pist n blades;

Fig. @-is'a detail view of one of tli packing lates arranged upon the pins of the piston lades; and Fig. 6 is a detail section taken on the plane indicated by the line (il-6 in Fig.- 4.

My improved reversible rotary steam engine comprises a cylinder 1 having its open ends covered bv removable heads 2 which are secured by bolts 3,' annular ribs being provided upon the inner faces of the heads to enter annular grooves in the ends of the cylinder to properly center the head and ,aren 'vide an effective connection, as show 2.. it the top of the bore of the cylinder iorined fa longitudinally `extending rib which ,provides anebntment 4, and iny an enlargei ment upon the exterior ofthe top of the cylinder are formed two similar riassages 5, 6 either otwhi-cli may serve es steam inlet the other serves esasteam exhaust. A slidable cup 4valve ':7 is arranged in a`\valve chamber.orstearn-ehest for .the purpose of.

nin Fig. Y

i reversing the inlet and exhaust of steam to the engine and thereby reversing the engine, as nesently explained. Said valve 7 is adapted to bring either of the passages 5, 6 into communication with an exhaust pas .we s which may in turn. have a suitable en ist pipe connected to it. A suitable steam inlet pipe is adapted to be connected to an inlet connect-ion 10 arranged at the top of the steam chest 8 and in one side or end of said chest is a stuffing box for a slidable operating rod 11 of the valve 7 which rod may be connected to a lever .or other operating device. The bottom of the exterior of Ithe cylinder 1 is sha ed to provide suitable supportingand attac ing feet l2 and in the center of said bottom is a drain passage 13 which is adapted to permit the water of con densation to be drawn ont of the cylinder and which is controlled by a pet cock 11i or the lilre. To facilitate the outlet of steam from either side of the cylinder according to the direction of rotation of the piston within the saine, the inner face of the bore of the cylinder is cut away, as shown at 15, from the passages 5, 6 to points approximately midway the sides of lthe cylinder7 the lower extremities of said cut away o r enlarged por tions l5 being beveled, as indicated at 16,

i for a purpose presently explained. l y lates or heads of the body oli 17 denotes a shaft extending eoncentrically through the cylinder and journaled in bearings 18 on, the cylinder heads 2, said bearings having composition. metal boxes i9, oil supply .passages 20, and stuiiing boxes 2l, as clearly shown in Fig. 2. Fixed to said shaft 17 is la concentric cylinder piston 22 carrying two radially siidable piston blades 23 arranged at dialnetrically opposite points iirlengitudinal recesses or slots 24 formed in 'as shown in Fig. plates 25 ln the niston heads or are termed radial s ots 2? adapted ing supplied to them through passages 26,

thel piston. The piston 22 is of less dianr to receive `guide-z pins 28 formed at opposite oints upon the ends of the piston blades 23. he latter are rectangular in shape and have their outer edges grooved longitudinally to receive packing strips 29 which are projected by coil springs against the inner wall or bore of t e cylinder and also against the bottoms'of the enlargements 15of said bore, the inclined ends 16 of said enlargements 15 being providedA for the pur ose `of guiding the packing strips 29, as ivi be. readily understood. "The inner edges of the piston blades 23Y are formed -with central recesses 31 to slide against the inner faces of the piston heads 25 and into and out of recesses 32 formed in the bottoms of the recesses or slots 24 of the piston, as clearly shown in Fig. 2 of the drawings.

The iston blades 23 are moved into and out of t ie piston by the passage of the guide pins 28 through endless guide' grooves 33 formed in the inner faces of the cylinder heads 2 and having concentric portions 34.

and eccentric or cam portions 35, as clearly shown 1n Fig. 3, and in order to reduce frlction and to cause the blades to Workeasily,

` anti-.'iriction rollers l36 are arranged u on the pins 28 to travel in the grooves 33. o urther reduce friction anti-friction roller bearings 37,' shown in Figs. 4 and 6 ol the drawings, are arranged Within the rollers 33 and 2&3 ci the pins 28` by the engagement ofthe inner .rings '39 with shoulders 41 formed by reducing the pins 28 and also by washers`42 .hi on reduced screw threaded extremities of, said pins'by nuts e4, as clearly shown :in Fig. Il of the drawings; To supply lubri cant to the roller bearings, radial oi passages 4s `are formed at four or more points 1n the rollers 38 and are adapted toreceive oil or ,lubricant from inclined oil passages e6 'l formed in the heads 2 at the upper to i Por tions ci the grooves 33. i Suite le oi cups may be applied to the outer ends of the oil passages le to constantly supply lubricant to the seme.

in crder to prevent steam from working.

around the ends ci the piston blades 23 and into annular recesses or cavities 47 formed in the inner faces of thecylinder heads 2, packing plates 48 are arranged upon the squared or flat faced portions of the pins 28 upon the outer faces of the iston heads 25. @ne oi these plates 48 is s own in Fig. 5, upon referenceto which itwill be seen that it has a square central 4opening to receive the pin 2S so that it cannotlrotate upon the sedere latter; and upon reference to Fig. 2'it will be seen that said plates are of sulieient length ,to cover the slots 27 without regard to the positions of thcpins 28 in. said slots.

from the recesses 47 that may work into same'and also to permit the water of condensation to drain from said recesses, downwardly inclined outlet passages 49 are ,formed in thecylinder heads 2l at the bot- ,tom

portions of said recesses, as shown in Fig. 2.

In order to avoid compression in the slots or recesses 24. for the piston blades, without making said slots or recesses unduly wide, a steam passage is formed in the iston around each of the piston blades, suc 1 passage consisting of two portions 50 on opposite sides of the slot 24 and connecting por# tions `51 which afford communication be- -tween the inner ends 'of the portions 50 and an enlarged portion or recess 52 which is in turn incommunication with the bottoni of' the slot 24 and serves as a cage for a ball check valve 53. The latter is retained in the recess 52 by a pin 54 and it is adapted to seat against either of the passages 51 according to the pressure of steam in said pas sages.

The abutment 4 is provided with a T- shaped packing strip 55, the cross portion of which is disposed outside of 'said abutment and has beveled edgcs' to guide the pistou blades 23 and their packing strips 29; and a third portion or arm 57 of said lT-shuped packing strip is slidable in a longitudinal groove .formed in the abutment and is actuated outwardly by coil springs 58, as clearly shown in Figs. l and 2 of the drawings.

The y operation is follows: Assuming the parts to be in the osition shown in Fig. l', the steam entering tie chest 8 through the inlet l0 will ass over the valve through the passage 5 and) into the left side of the cylinder and its pressure against the left blade 23 will cause thc piston and its shaft to rotate in the direction indicated by the arrow in Fig. ,1. The steam also seats the check valve 53 of the `left piston blade to prevent the passage of steam-around said blade but at the same time to equalize pressure in the recess or slot 24of such blade and prevent compression as the blade recedes into the piston upon the passage of its vguide pins 28 through the cam portions 35 of fthe grooves 33. As the piston 22 rotates thci'light blade 23 in Fig. l will be retracted into the piston owing to the move ment of its guide pins 28 lthrough. the cam portions 35 of the grooves 33 and when the outer edge, or the aching strip in said edge, leaves the WalPof t 1e cylinder bore the'stc'ani confined in the bottom portion oi the cylinder between the two blades will pass out of the right side of the cylinder through the pas iso 9a When itis l the valve 7 is shifted to theleft to 4.cause its chamber to aord communication between the passages 5, 9 while the passage 6 is un When the valve -is ina cen-l .in communicationwith the out-let passage 9.

Having thus described the invention what is claimed is:

. 1. In a rotary engine, the combination of a cylinder having an" abutment and steam passages on'opposite sides of the abutment, cylinder heads provided with grooves having concentric and eccentric portions, a rotary piston, a radially slidable .piston blade in said piston provided at its ends with guide pins to travel through the grooves in the cylinder heads, said )ins .having reduced cylindrical portions and reduced threaded extremities, anti-friction rollers arranged upon said pins and adapted to travel through the grooves in the cylinderheads, rollerbearings arranged on the reduced cylindrical portions of the pins and within the anti-friction rollers, said rolleiibearings having their cages engaged ith the shoulders formed by the reduced cylindrical portions of the pins, Washers arranged 4on the reduced threaded extremities' -of said pms and engagedwith said ant1-fr1c tion ro lers and nuts upon said reduced 'threaded extremities of thc pins.

2. .ln a rotary engine, the combination of I' a cylinder having an abutment and steam passages on opposite sides'of-theabutment, cylinder heads pro vided with grooves having concentric and eccentric portions, a rotary piston, a radially desiredv to reverseqthe engine slidable pistonblade in said yada ted to travel in the grooves in t piston provided at its ends with guide pins to travel through the grooves in the cylinder heads, said pins having squared flat faced portions and cylindrical portions, o rollers upon the cylindrical portions of the pins and e cylin der eads, piston heads upon the ends of the piston and formed with radial slots to receive the iat faced portions of the pins of the iston blade, and packing plates aperture to receive the flat faced portions @of said ins and. adapted to engage the outer faces ot the piston heads to close the 'slots in said heads.

3. In a rotary engine, the combination of a cylinder having an abutment andteam passages on opposite sides of the abutment, cylinder heads formed in their inner faces with grooves havin concentric and eccentric portions, said cy inder heads,Y being also formed` with oil passages in communication with the upper portions of their grooves, a rotary'piston, a radially slidable piston blade in the piston andprovided at its ends with guide ins to travel throughdthe grooves in the cylinder heads, anti-friction rollers upon said guide pins and formed with oil passages extending from their peripheries to' their bores and adapted to receive oil from the oil I signature in the presence of two witnesses.

` WALTER S. MINGR. Witnesses W. A. ROGERS, i LoNzo MORGAN.

through the v

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