US1224566A - Internal-combustion engine. - Google Patents

Description

. S. I. PHESCO-T.' INTERNAL COMBUSTION ENGINE.

APPLICATION FILED Home. Isls.

- /yrfwa I S. I.'PRESC`0TT.

mrEnNAL oo MBu'sTloN ENGINEV APrLlcmou man Nov.1s.191s. I v

Patented 'May 1, 1917.

3 SHEETS-SHEET 2 Patented May 1, 1917.

3 SHEETS-SHEET 3 SYDNEY I. PRESCOTT, OF NEW YORK, N. Y.

INTRNALCOMBUSTION ENGINE.

Specification of Letters Patent.

Pa. telit-ed May 1, 1917.

Application led November 16, 1915. Serial No. 61,73'

To all whom it may concern:

Be it known that l., SYDNEY l. PnEsooT'r, a citizen of the ,United States, residing at New. York, county of New York, and State of New York, ha re invented a new and useful Improvement in Internal-Combustion Engines, of which thc folloiving is a specification.

This invention relates to an iini'noveinent in internal combustion engines, particularly to those of the multi-cylinder two-cycle type" ln two-cycle engines heretofore employed, it has been customary to introduce a charge of fresh gas into the combustion chamber of the cylinder while the chamber was filled with fianiing gas passing out through the exhaust port, the greater speed of the exhaust being relied upon to prevent ignition of the incoming charge. "The present invention has for one of its oliij'ects the production of a two-cycle engine in which. a scavenging charge of clean. air preferablyr under pressure introduuredy into the coniliustioi'i chamber after the exl'iaust port has opened` and before a charge of fresh flows into` the chamber. This is for twoY distinct purposes: first, to drive the buiined gas out oli the cylinder in decreased tiine the pressure within the cylinder falls; and second, to forni a cloud` or barrier of clean-air .lie-

tween the outgoing flaming gas and 'an in' coi'ning charge of fresh gas particularly when, as in the iiiresent instance', the incorning charge of fresh flows at high speed.

The speed of two-cycle engines heretofore employed haslocen liniited because, aniong other reasons, of the liinited tiine availaliile for exhausting the burned' from the cylinder and introducii'ig a charge of .fresh gas. The present invention has for another of its objects the production of a two-cycle engine in which the initial pies -sure of the charge` of fresh gas is greatly inrrcased over that heretofore found possiblev in this type of engine so that the transfer of tlgl fresh. from the induction. chamber to the combustion chamber is inade in niuch time than has heretofore been possible. 'Duo partly to the quicker expulsion of burned gas from the cylinder by the use of scavenging air 'under pressure, and partly to `the quicker transfer' of the fresh gas from the induction chainber to the combustion chamber of the cylinder, which is iniide pos sible by the use of Alhe barrier of clean air yin the cylinder betueen the outgoing fiaining gas and the inc( ining fresh gas and byV the higher initial pi essure of the fresh gas charge, higher engini speed is attained.

In certain types oi two-cycle engines herci,

tofore used, fresh has been pumped into the crankcase, therein compressed slightly, and than transferied to` the coinbustiiin chamber solely through ports or passage.4 uncontrolled by an)` valve mechanism. .In certa-in other types the initial charge of fresh gas has been drawn into and coinpressed in the lower part of one cylinder, and then transferied to the combustion chainber of anothei cylinder, this transfer being' effected thioi gli the agency of suitable passages and a distributor' Valve. Thepi ,sont invention has for another of its objects the production of a two-cycle engine in' which. an induction :li amber is fori'ned within apiston, fresh g: `sbeing drawn' into this cliai'nlier by 'the ino rcinentlof the piston in one direction, coinpiesscd tlierein du ig the movement' of the p ston in the opposite diieetioi'i, and then tr: nsferred through a snitalile port iirthc wall of the piston and short ily-pass passages to the con'ibustion chai'nber and the (.:ylinder in which the piston Works,

the time of the trai sfer being controlled by a rota ry valve.

Another object oil the invention is the production of a, twomy :le engine of the general cliiaraeter justdesc ibed, in which a single valve not only cont cls the transfer of fresh gas from the indue' ion chamber to the coinbustion chamber, hi t also coi'itrols the intake of fresh gas to tin induction cliai'nber and further controls tht iiiitrloduction of scavenging clean air into the combustion chamber just prior to the transfer of a charge of fresh RS. l i,

lVith the..v and )ther objects not specifically incntioned in View, the invention consists.- in certain 1arte, constructions and cornl'iinations whicl will be hereinafter fully described and thei specifically set forth in the claims her-cunt( appended.

In the accoinp: nying drawings, which form a part of this specification and in which like characters of reference indicate the saineor like pa ts, Figure 'l is a sectional elevation through one cylinder of a multicylinder engine constructed in accordance with the invention; Fig. 2 is a plan View of 1" having a wall port and working within the cylinder, means cooperative with the piston to form an induction chamber within the piston, and means coperative with and controlling the piston port to establish open communication between the induction chaml ber and the source of gas supply, then confine the charge of gas within the induction chamber 'substantially to the end of the power stroke, and then elllect its transfer to the combustion chamber during the rst part of the return stroke. In the best'- constructions, there is also provided 'a source of clean air supply and means for introducing clean air into the combustion chamber of the cylinder after the exhaust port has opened and the liaming gas has begun to n flow outward and before a charge of 4fresh gas begins to flow into the combustion chamber. In the best constructions also, a rotary valve and cop'erative by-pass mechanism is utilized for the purpose of controlling the inflow of gas to the induction chamber, the inflow' of clean air to the combus tion chamber for scavenging purposes, and the transfer of the fresh gas from the induction chamber to the combustion chamber. In the bcstconstruction also, the induction chamber is formed within the piston by a device which is piloted in one end ofthe cylinder and which projects into the piston. In the best constructions also, this device is also operative as a crosshead guide and a crosshea-d works within this device, connection being made between the crosshead and the piston by a piston rod passing through a stuffing-box formed in said device. All of the above n'iechanisms and devices may be varied in construction within wide limits.

The invention selected to illustrate the in` vention is but one of many possible concrete embodiments of the same and the invention therefore is not to be restricted to the precise details ofthe structure shown and described.` Furthern'iore7 certain partsof the invention are capable of use indpendent of other parts, and such independent use is contemplated. D

Referring to the drawings, 1 indicates the upper part of a crankcase casting which is of' we ll known construction and is therefore merely indicated in the present drawing.

Supported by the crankcase 1 is a block casting- 2 having a number of cylinders 3" formed therein. The blockcasting 2 is held used inf'place vof the watervsystem, if desired.

in place upon the crankcase 1 by means of holding` bolts 4 of well known construction. The upper end of the block casting 2 is fitted with a casting 5, and the casting 5 is held in place in a well known manner by means of bolts 6. This casting 5 forms the heads of the cylinders' 3.' -Surrounding the upper part of the cylinders 3 is a water jacket marked 7 and this water acket opens through suitable apertures 8 into a water jacket 9 formed in the casting 5 before referred to. An inlet for the water is prou vided at 10 near the lower end of the water jacket,land an outlet for the water is provided at 11 which is an extension of the water jacket 9 within the casting. The casting 5 is provided with threaded apertures 12 above each cylinder adapted nl) receive spark plugs. Of course, air cooling means may be lVorking within each cylinder 3 is a piston 13 having a pair'of elongated portsy 14 in one side thereof. These'portsare always in register `with an intake port 15 cored in the castihgj2and opening into a vaiye chainiber 16 located beyond the water jacketl' .foil one sideof the casting. Above the intake port 15 is cored a by-pass port 17 which v opens int-o the interior of the cylinder 3 and the interior of the valve chamber 16. Upon the opposite side of each cylinder is located an exhaust 'port 18 cored in the casting 2 and extending through the outer wall of the water jacket 7 where it may be connected with a suitable manifold, not shown'. By an inspectionof Fig. 1, it will be seen that the port 1S is a little higher than the by-pass port 1T and considerably higher than the intake port 15. v

Located immediately below the valve chamber 1G is a gas manifold 19 ported at 20into the valve chamber. It will be understood that this valve chamber and manifold extend along or across all of the cylinders, and that the manifold 19 is ported into the valve chamber opposite each cylinder. A pad or boss 2l.is provided in the lower wall of the manifold 19 to which a carbureting device may be attached.

Above the valve chamber 16 is a clean air manifold 22 ported into the valve chamber 16 at 23 opposite each cylinder, and provided with a pad or boss 24 to which a suitable supply pipe maylbe secured.

Located within the valve chamber 16 is a rotary valve 25, this valve having a central aperture 26 and beingdesigned to be rotated in'tlie direction of the arrow'by mechanism not shown but well known in the art, the speed of rotation rbeing the lspeed of the crankshaft, although in certain constructions the speed may be varied when the design ot'` the valve is also varied. The valve, 25"'is provided opposite ach cylinder with a short circumferential recess 27 of a width equal to the widtlr of the intake ports 15 and by-pass ports 17. From thisl recess are extended two companion recesses, each of a width corresponding with the width of the piston. ports 14 before referred to. rl`he ports 2O leading vrfrom the gas nianifoldl.) tothe interior of the valve chamber 1G are each of a width equal to the width of one of the recesses 27; while the ports are of a 'width,somewhat less than the width of the valve between the companion recesses 2S before described. The reason for this peculiar structure will appear hereinafter.

The piston ports 14 are always in register with the intake ports 15; while the by-pass port 17 is cut off from the interior' of the piston when the piston isat the lower' end of its i'noveniient.

For the purpose of forming an induction chamber within each piston, there is provided a closed-end cylindrical device marked which is provided with a flange 30, this -flange being counters-ank in a suitable counter bore in the lower end of the cylinder 3. The end of the device 29 projecting below 'the flange 30 is piloted in a suitable aperture in the crankcase 1. This construction is clearly shown in Fig..1 and further description is deemed unnecessary land is therefore omitted in the interest of brevity. It will be readily yunderstood that by` means of this construction, accurate alinement of the device 29, concentrically with the cylinder sured. The device 29 is provided with a suitable stuffing-box, marked 31, of well known character. formed in the piston 13 is a pin 33 this pin is mounted a piston rod 341. This piston rod projects through the stallingbox 31 before referred to and is threaded into a head 35 located below the stuliing-box.

This head 35 also carries a wristpin 36.

The lower endlof the piston rod 341 is trans- .versely grooved at 37 and the middle section of the Wristpin 36 is transversely grooved at 38'. .Engaging these grooves is a tapered bolt 39, this bolt being fitted into the head before referred to.. Jvournaled' upon the wristpin 36 is a fork The extreme cnds of the wristpin 36 are pocketed in short bosses Ll2 formed on a V circular crosshead 43' which wor within the device 29 before referred to.

The position ofthe closed end of the in` duction chamber that the clearance and the head of the piston-when the latter is at thelower end of its strolre-is del-initely larger than the f :learance space between thepiston head and the cylinder head at the' upper end of its stroke l cylinders 3 and the piston 13, is ini Secured in bosses and upon i p 4,0 formed on a con' necting rod 41, the other end of which isv connected with a crankshaft, not shown.`

forming device 29 is such space between its head rfhe parts arl shown in Fig. 1 in the position' correslmiding to zero degrees in the cycle of opel ations of the master cylini der; and Figs. l to 10 inclusive illustrate the position of the valve .25 with respect to the several porti at different times during the cycle of o1 crations and indicated in these ligurcs. la is to be understood, however, that by varying the relative positions and proportions of the ports and valve re-A cesses, different ,iming may be effected; and it is further to be understood that the rccesses and the valve opposite the several are `so located with respect to one another as to br ng about the cycle of operations in the seve ral cylinders in their proper order.

Referring to Alig. 1, it will be seen that at the time the pis :on at the top of its Inovement, zero deg rees in the cycle, the gas manifold 19 is in open communicationthrough the n anifold port 20, the co1n panion recesses 28, theintake `port 15, and the piston port 1L1-with the induction chamber formel within the piston 13. At 20 degrees in tl e cycle of operations, Fig. 3, this communics tion is cut olli.I ,At this time the piston is ',ravelin'g downward on the power stroke. After the intake is, cut olf at 20 degrees, con pression of the charge in the induction chan ber of the piston begins. At 117 degrees, Fi g. 4t, the piston begins to uncover Vthe exhi ust port'18 and the burned gas begins to. blow out'throngh this port. At this time, tie by-pass port 17, the intake port 15, and as `manifold port 20, are all cut off by the 1alve. At 127 degrees, Fig. 5, the piston has begun to uncover the bypass ort 17. It W ll be noted that atthis time, the recess 27 As almost in position to open the air manifc ld port 23 to theby-pass port 17. At 135 dagrees, Fig. (i, the piston has uncovered mo'e of the by-pass port 17 and the recess 27 )f the valve` is in position to open commun cation between the air nl anifold 23 and the by-pass port 17. At this time, clean ai begins to low from the air manifold wh i 'e it is maintained under pressure into the combustion chamber of the cylinder'above the piston, the pressure of the burned g: s within the cylinder having fallen by this time below that of the clean incoming air. The result is that the last traces of the burned gas are expelled from the cylinder and the cylinderis clean air. At 17() degrees, Fig. 7, the wall of ,the valve between the companion recesses is coinpresseil in the induction chalnber formed withi 1 the piston. This gas also fills the intake po t 15, through the always registering piston port 14, and is held back by the [il l ed with At this Y within Athe induction chamber is not equal to the compression of gas in., the combustion chamber 'for ignition purposes, but 1s sutlir cient to insure averygrapid transfer' o-the gas from the induction chamber to the coinbustion chamber. At 180 degrees, Fig. 8,

the recess?? of the valve Q5 opens com# munication between the intake port 15 (and of course the induction chamber) and the combustion chamber above the piston through the by-pass port 17. It will be readily understood that as soon as the crank passes over its lower dead center and the piston begins its upward movement, the pressure within the induction chamber aids this movement. The power expended in the preliminary induction chamber compression is thus in part given 'baclt to the engine. At 233 degrees, Fig, 9, the piston has moved upward far enough to cover the bypass port 17. The flow of gasiro'm the induction chamber to the combustion chamber" therefore ceases at this time, and the intake through the gas manifold port 20 begins to open. At 2&3 degrees, Fig. 10, the piston has moved up far enough vto cover the exhaust port 1S. From this point to the end of the up stroke, the charge of gas is being,r compressed in the combustion vchamber above the piston and a `fresh charge is being ,drawn into `the induction chamber from the .a piston having a wallport elongated in the direction of piston travel and workinga within the cylinder, means cope ative wf the piston to form an induction chamber within said piston, and means continuously coperative with and coiiti'olling-the piston port to establish open communication between the induction chamber and the source of ,eas supply, then confine the charge of gras within the induction chamber sulistantiaily to the end of the power stroke, and then eiiect its transfer to the combustion chamber duringthe first part of the return stroke.

2. In an internal combustion engine, the combination with a source or' gas supply, of a cylinder having a combustion chamber, a piston having a wall port elongated in the direction of piston travel and Working Within with the piston to form an induction chamber within said piston; and means continuously cooperative with Aand controlling the piston port to establish open communication between the induction chamber and the source of gas'.

supply, then confine the charge 'of gas within the induction chamber substantially to the end of the power stroke, and then eilect its transfer to the combustion chamber during the irst part ot the return stroke.

cylindrical device cooperative with the pisf' ton to form an induction chamber within said piston. and means continuously coi'i'perative with and controlling the piston port to establish open communication between the'induction chamber and the sourceof gas supply, then conliue the charge of gas within the induction chamber substantially to the end ot the power stroke, and then e feet its transfer to the combustion chamber duringr the first part of the return stroke.

4. ln an internal combustion engine, the

combination with a source of gas supply,

oi" a cylinder having a combustion chamber,

a piston having),A a wall port elongated in the= direction of piston travel and working within the cylinder, closed-end cylindrical device cooperative with the piston to form -the cylinder, stationary means coperative icc an induction chamber within said piston,

a cross-head worling within said cylindrical device, a piston rod connecting said crosshead with said piston, and means continuously cooperative with and controlling the piston `port to establish open communicationbetween the induction chamber and the source ot gas supply, then conine the charge.

ci'inibination with a. source of gas supply,

of a cylinder having ay combustion chamber, a piston having,r a 'all port elongated in the direction of piston travel and working within the cylinder, means eoperative with the piston' to forni an induction chamber `within said piston and having a clearance deti'nitely 'ger than that of the combustion chamber, and means continuously coperativewith and controlling the piston port tocstablish open communication between the induction chamber and the source of gas supply, then confine the charge of gas Within the induction chamber substantially to the end of the power stroke, and then effect r the direction olf piston travel der just vpiston havi Yto establish open connnuni :ation its transfer to the combustion chamber during the first part of the return stroke.

6. In an internal combustion engine, the combination with a source o't' gas supply, of a cylinder having a combustion chamber, a piston having a Wallport elongated in the direction of piston travel and working Within the cylinder, means cooperative with the piston to forml an induction chamber within said piston, means continuously cooperative with and controlling the piston port to establish. open communication between the induction chamber and the source of gas supply, then confine the charge of gas within the induction chamber substantially to the end of the power stroke, and then effeet its transfer to the combustion chamber during the First part of the return stroke, and means t'or 'scavenging the eomlnistion chamber and cylinder with clean air under Lpressure ijust prior tothe transfer of the fresh Vcharge of gas from the induction chamber to the combustion chamber.

7. In an internal combustion engine, the

combination with a source ot' gas supply, of a cylinder having a combustion chamber, a piston having a wall port elongated in the direction ot' piston travel and .working Withinthe cylinder, means coperatire with the piston to form an Ainduction chamber within said piston, means continuously cooperative with and controlling: the piston port to establish open communication between the induction chamber and the source of gas supply, then confine the charge of gas Within the induction chamber substantially to the end of the power stroke, and then eiectits transfer tothe combustion chamber during the first part of the return stroke, and means for introducingr a charge oi clean air into `the combustion chambc' and cylinprior to the' transfer o'l a fresh charge of gas from the induction chamber to the combustion chamber.

B. In an internal combustion engine, thel combination with a source ot' gas supply, of a cylinder having a combustion chamber, a 'nga wall port elongated in the direction oi piston travel and working within the cylinder, means cooperative with the. 4piston to foi-m apn induction chamber within said piston, and valve controlled means continuously cooperative with the` piston port between the induction chamber and the. source of gas supply,'then confine the. charge of gas withinithe induction chamber substantially to the end ofthe power stroke, and then ell'ect its transfer lo the combustion chamber during the lirst part ol the return stroke.

t). .Inan interni-il combustioncngine, the comllination ith a source olE gas supply, of a cylirn'lcl.' having' a combustion chamber, afpisl'on haring a wall port elongated in and working tion between the induction chamber and tween the induction chamber and the combustion chanilier duringthe lirst part of the return stroke. V

10. In an internal combustion. engine, the combination with a source o f gas supply, of a .cylinder ha fing a combustion chamber, a piston having a wall port elongated in the direction ot' piston tavel and working within the cy inder, means cooperative with the piston tr form an induction chamber within said listen, and a rotary valve and cooperative ivf-pass mechanism continuously cooperative n lth the piston port and adapted. to cstabls 1 open communication betweenthe induction chamber and the source of gas supply, then ,-onfine a charge of gas within-l the inductior chamber substantially to the end oi the power stroke. and then establish op'eu cmnnnlnication between the induction chamber and ihe combustion chamber during the first part of the return stroke.

.11. In an internal combustion engine, the combination with a source of gas supply, of a cylinder' laringa combustion chamber, a piston havin a all port elongated .in the direction of, piston travel and workin within the cylinder, means cooperative wit 1 the pistonti forni an induction chamber within said piston, a source of clean air sup-- ply, and a rotary valve and coperative bypass mc .ln\nis1n continuously cooperative with the pis Lon port and adapted to establish open communication between the induction chambeand the source of gas supply, then coniine the charge oi gas within the induction chamber substantially to the end of the power smoke, establish open communication betwlen the source of clean air snpply and the combustion e'hamber'during the last part ot' 111e power stroke, and thereafter establish op en communication between the. induction ch imber and the-combustion chamber during tie first part ot the return stroke.

12. In an internal combustion engine,the combination with a cylinder having a combustion cha ube and provided with a. bypass portant] an intake p ort in its wall, of

a piston wo 'kin'in the cylinder and having 'l a port in its wall always in register withthe intake' port, means cooperative with the pistou tutori i an induction chamber' Within said pistonnd means for confining the. hon chamber charge of grs within the indue during the last part of the newer stroke.

and then effecting its transfer through said ports to the combustion chamber during the first part of the return stroke.

13. In an internal combustion engine, the combination with a cylinder having a combustion chamber and provided with a bypass port and an intake port in its wall, of

' a piston workin in the cylinder and having a cylinder having a combustion chamber, a

Y 45 tinuouslyfcoperative with and controlling water jacket surrounding the cylinder, a piston having a wall port elongated in tlie direction of piston travel and working within the cylinder, means coperative with the piston to form an induction chamber .withiii said piston, and means located mainly beyond the water Vjacket and continuousl operative with and lcontrolling the'piston port to establish open communication between the induction chamber and' thev soiirce of gas supply, then confine the charge 'of gas within the induction chamber substantially to the end of the power stroke, and then effeet its transfer to the combustion chamber duri-ng the first part of thereturn stroke.

15. In an internal combustion engine, the combination with a source'of gas supply, of a plurality of cylinders each having a combustion chamber, a plurality of pistons working Within the cylinders and each having a wall port elongated in the direction of piston travel, means coperativefwith each piston to form an induction chamber within` said piston,- and asingle movable member conthe piston ports: to establish in proper order openy communication between the induction chambers and the source of gas supply, then confine in proper order charges of gas withinthe inductionchambers substantially ,to the en d of each power stroke, and then efect the transferin proper order of charges from the induction chambers to the corresponding combustion chambers during thelirstpart of*A each return stroke.

' 16. In an internal combustion engine, theA combination with a source of gas supply, of

a plurality of cylinders each having a Combustion chamber, a plurality of pistons working vwithin the cylinders and each having a wall port elongated in the direction of piston travel, means coperative with each pist'on to form an induction chamber within said piston, and a rotary valve common to to establish open communication in proper order between the induction chambers and the source of gas supply, then confine in proper order charges of gas within the induction chambers substantially to the end of each power stroke, and then effect tlietransfervin proper order of charges from the induction chambers to the corresponding combustion chambers during the lirst part of each return stroke. I

`17. In an internal combustion engine, the Combination with a source of gas suppl-y, ot' a cylinder havinga combustion ehan'iber, a piston having' a/fwallcport elongated in the direction of pisyfon travel andworking within the cylindery-,i closed-,end cylindrical device countcrsunl'i into one end .of the cylinder and coperative with the piston to forni an induction" chamber within said piston, and means continuously cooperative with and controlling/'the piston port to establish open communication between vthe induction chainber and the source otzas supply, then confine the charge of'gas within the induction chamber substantiallyv to the end of the power stroke, und then effect its transfer to the combustion chamber during the first part ofthe return stroke. Y

18. In an internal combustion-engine, the Combination with a source of 4gas supply, of

cylinder, a closed-end cylindrical device cooperative with the piston to form an induca cylinder having a combustion chamber, a piston having awall port elongated in the direction of'piston travel and working with- 100 the cylinder, a crankcase supportingv the tion chamber within said. piston landhaving a flange between its ends 'counter-sunk into the cylinder' and clamped between the cylinder and thev crankcase andpiloted in the crankcase, and means continuously coperative with and controlling the piston portvto establish open communication between the induction chamber and the source of gas supply,then confine the charge of gas within the. induction chamber substantially to the end of the power stroke, and then effect itsl transfer to the combustion chamber during lthe first part of the return stroke.

ils

19. In'an internal combustion engine, the combination with a cylinder having a combustion chamber, of'a valve chamber having a port leading into the cylinder, a scavenging air conduit adjacent and having a port leading intothe valve chamber, a gas con-- duit adjacent and having a port leading into the valve chamber, a piston Working within the cylinder and having a port adapted to coperatewithA the. port leading from the valve chamber, means coperative with the piston to form an induction chamber therein, and a single 'valve working within the valve chamber and coperating with the 1anl l ingwit` several ports and arranged and adaptedto establish in proper ,order and timed relation open communication between the combus tion chamber and! the air conduit, between the induction chamber and the gas conduit, and between the/ induction and combustion chambers; o

20. In an in rnal combustion engine, the combination w ith a plurality of cylinders each having combustion chamber, of 'a valve chambr common to all of the cylin ders and ha ing ports leading thereinto, a scavenging ir manifold adjacent and having a port eading into the valve chamber opposite ea h cylinder, a gas manifoldadjacent and h ving a port leading into the valve chamberA working ports ad( leading rom the valve chamber, mean operativ with the pistons to form indu', n chambe/s therein, and a single valve work-` ing Wit in the valve chamber and coperat-v the several ports and arranged and adapte '4to establish 1nA proper order, and

timed r lation open comnnlnication between .valve Cl amber extending4 a'lon a series o ports. leadingintotli the conibustion chamber and the air conduit, betwee the induction chamber andthe gas condui and between bustion chambers. Y

21., I an internal eombustio"Y en ne combinL tion with a, plurality each hK ving .a 'combustion the induction and`com+ and acr as all of said cylinder scavenging air manifold and having a series of ports/.lead g valve chamber one opposlteeach a series of ports leading-into 1 V ber one opposite each cylinder, py ,v1/nis vvorlcV ing within the cylinders and lia'v/n ports adapted to coperate withnthe/prts from the valve chamberie'ansggcoje with the pistons to foifinductioncla 4 therein, and a single rotaryvalY orling within the valve', chamber andcooperatiig duit, between the induction chambers and 1` pposite each cylinder, pistons" `ithin the cylinders and having l' pted to cooperate with the ports piston t timed relatior open communicatin'betiveen the combusticn chambers and the air conthe gas" condiY it, and between thel inducti and combustion chambers. f A 22. In an i1 vternal combustion engiIie'QSthe combination Vith a cylinder havin' bust-ion chaml er, of a valve cham having a portvleading,l into the cylinde' "fa" duit adjacent mdhavirig av p y, the valve chainben, a pisto'nw` in the 4cylinder and having a port adapted to coperat'e v'iththe' Ai-t leading from the valve chamber e( "s coperative' with the vorking Within the Q3.' Ill-an ii termal` comb Ati n engine, the

combination.v'ith ajtyinde ,l avi-ng a com bastion.chamber, Lft ,valvechamber hav- 1 ileui'ngli 'the-fcylin-der in sepa- V75 iti'on ifa? gate' conduit, adjacent and @C I Y 'ndiut l Single valve iv )rking Within t .b er and cooperating. with?F and arranged and-adaptrh communication infwifi/taper' relation betwe n tlji' the gasle'onduit and combina: 'tes' y. .Y ivheioifI have signed my lame-to thwepecification in the presence of tiv'oenbee'rilafig witnesses.

SYDNEY4 I. 'PRESCOTT as ai. MCCANN, iramrn Looisn RUSSELL.

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