US1040472A

US1040472A - Gas-engine.

Info

Publication number: US1040472A
Application number: US58007310A
Authority: US
Inventors: Charles T Wade
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-09-01
Filing date: 1910-09-01
Publication date: 1912-10-08
Anticipated expiration: 1929-10-08

Description

C. T. WADE.

GAS ENGINE.

Arrmoulon FILED sum1, 1910.

Patented 0st. 8, 1912.

NIITEDSTAIES imminent.` OFFICE.,

cHAnLnsrwwnnn, or ANNAroLrs, MARYLAND.

- GAS-ENGINE.

\ vrmi-.elateaoct 8,1912.

` TQaZZ whom'z't may concern.' i Bait known-that I, CHARLES T.- WADE, a vcitizen of the United States, at present. sta` .tioned at Annapolis, in the county of .Anne Iatrundel and State of Maryland, have-in- -1vented icertain new and useful Improve-j ments in GasEngines; and I do hereby declare the following to be a full, clear, and exact `description of the invention, such. as

L ;m. willfenable others skilled in the art to which l 1 heylinder, jrwhich .hasboltedtoitsother end pertains to make and usethe same. y inventionrelates to improvements in gas engines and the object of my. invention is to provide a pluralityl-of'explosion cylin- 15h-ders. arranged .in a straight line, with. a.- single com-pression cylinderbetweentwo ex.`

' plosion cylinders, and allof the istons.be ingmounted `on a single piston ro whichis ,proyided with, means for admitting charges gopfcarbureted air from the compression .cyl- .inder `into the explosion. cylinders altermately. at the proper -times. A,.urther object of the invention is .to provide eilicient4 means for cooling the inteit a ,25. rior :oftheexplosion cylinders,. which, as-is y,well known, is a matter of great. diiiiculty. Gross reference is made to a prior applica tion,x-,Serial No. 491039, filed by applicant -.on Apr. 20, 1909, for a gas .engine construc- .130.y tion not covered by the claimsin. this application.

With these objects in View, .and .others that. will appear 1n the detailed description, my invention consists in the construction M (and combinations of parts as hereinafter described and claimed.

j In .the accompanying drawings z-Figure 1 .is, a 1verticalsection of my improved gas engine, partly in elevation. Fig. 2 is a cross 40..section on.,the line .2f-2 of Fig. 1. Fig. 3 lis acrosssection on the line 3-3 of Fig. 1. Fig. 4e` is a cross section through the piston rod and the top of one of the explosion cylinders. Figs. 2, 3 and 4 are on'a larger scale $5. .than Fig. 1.'

My invention is a double actingtwo cycle engine and .can be arranged in a vertical 'plane as shown in the drawing, or in a horizontal plane yor an inclined plane as desired. y a re resents a fly wheel mounted on the `shaft t) located in bearings on the base c. This shaft is provided with a crank 10 which is connected by means of the'common connecting rod d, with a wrist-pin -11 carried by ,65 the piston e inthe explosion chamber next to .the usual packing rings Theexplosion cylinder., g.is bolted 0n to the base cy .in` the-y .usual manner and -is vpro- .,z., extending .at intervals .completely around the .periphery of the lcylinder. 4 It is provided with the usual waterjacket i, although .itzmaybeair.eooledif desired.` Bolted to .nneend of; thecylnder (1 is 'the compression Vv",theseeond explosiony cylinder 7c. This second explosion-cylinder is also provided with a series ',ofmarrow. exhaust ports Z, extending atintervals completely around the .periph- .ery lof the.l cylinder. mis a.water jacket mounted-on ,this: cylinder,. which however ,maybe Aaircooled if desired. The compres- ,sion cylinder j is slightly. larger in diameter ,thanthe explosion cylinders'in order to .give tagreater..spaceaforL-.drawing in char esof learburete .air.v .The explosion cylin ers g and 7c areeachnpen at one end .and areprovided at theotherend with heads n. and 0 respectively, which heads formgpartitions .betvveenzsaadv cylinders .and thefcompression cylinder j. ,Thesepartitions form `bearings dior. the piston .rod.;0, and in these partitions are mounted pack-ing rings q and 1'. Mountedon the .piston rod.y p, and located within the cylinder j is the compression piston u .and .near this piston and on both sides of the `lsameslits 4 `and 5 .are cut in the rod 7), which `will be. hereinafter described. yThe piston rod .at one end isscrewed into a screw threaded .opening in the pistone', located in .oneof the explosion cylinders, and on its other end.- is .screwed a piston e located in theV other explosion cylinder. These three pistons are screwed to the piston rod p at Awith the usual packing rings.

w and m represents spark plugs for the explosion cylinders, but obviously anyvwell known means of ignition may be used.

a1T,shaped pipe 3 the ends of which are screwed into openings into the cylinder j. Near the ends of this pipe are located the check valves 1 and 2 and the pipe 3 communicates with'. the c linder y' near the ends of. said cylinder. T ese check valves prevent backward flow when the `charges of carbureted air are being compressed first on :the.-base 0,-saidkpiston bei-ng provided. with.

,vided with, a seriesofl narrow exhaust ports.

\ Mounted on the cylinder j, at one side, isv

e ual distances apart, and are each provided one side. and then on the other side ofthe piston u, Connected to the T shaped pipe 3 is a carbureter l2 of any approved construction, or a pipe leading to a gas producer.

In Figs. 3 and 4 is shown on an enlarged scale means for delivering the compressed charge from the compression cylinder to the explosion cylinder consisting of a number of slits such as -5 cut in the circumference of the piston rod p near t-he point where it is joined to the piston u. As shown in Fig. 3, these slits do not pass entirely through lthe wall of the piston rod. The piston rod p is hollow from end to end as shown and the three pistons are, of course, centrally cut away at the point of junction with the piston rod. I prefer to make the piston rod of considerable size relatively to the pistons.

vConnected to the top of the cylinder c is a casing 9 which is connected to a suction fan 8 lof any desired type, said fan being driven from any suitable source of power by a pulley 7. The urpose of this fan .is to cause a constant circulation of cooling fluid through the hollow piston rod p. The crank casing being open the suction fan 8 causes a constant current of air, as indicated by the arrows, through the bottom part of the engine andv up through the hollow iston ro p. The piston rod is made, as a ready described, comparatively large inl diameter and with comparatively thin metal walls,l the cylindrical shape affording suflicient strength, and the cooling action is therefore very rapid.

As is well known, the chief dilliculties of operating internal combustion engines of large size are (a) to overcome momentum iol of reci rocating parts; (b) to cool the engine; c) to keep valves tight and passages clear. In this engine (a) is taken care of by having a compression at the end of each stroke; (b)` by cooling surfaces, external andint'ernal, which combined area may be varied for a given effective piston area; and (c) .by providing enough gas under pressure in the compression chamber to lill the entire combustion chamber, and having only mechanical openings, not valves, subject to the heat of the combustion chamber.

The operation is as follows: Supposing that the parts are in the position shown in Fig. 1 with a compressed charge in the cylinder g. This charge being ignited forces the piston e down, and by means of the piston,

rod p .the piston u is drawn down at the same time compressing a charge of carbureted air on the lower side of the pistonu in the compression'chamber. This compression continues until the piston u has about .reached the lowest limit of its stroke, .when

the exhaust ports li are uncovered, releasing the pressure in the cylinder g, and immediately after the slits 5 form a communication between the cylinders j and g admitting a charge of carbureted air in the top of the cylinder g, the slits 5 being longer than the cylinder head. This completely blows out the burnt charge from the cylinder g. At the approximate beginning of the return stroke ignition 'of tlie compressed charge 1n the cylinder la, as hereinafter described, takes place, and upon the upstroke the plston e then compresses a charge of the carbureted air in the upper part of the cylinder g, while the piston u is drawing in a new supply of carbureted air on its lower side through the valve 2, and on its upper side compressing a charge of carbureted air which had 'previously been drawn in through the check valve 1. Upon reaching the limit v of the upward stroke the exhaust ports l are uncovered, releasing the pressure in the cylinder lc and immediately after the slits 4 above the piston u will reach the position shown in Fig. l and a compressed charge of 'carbureted air is admitted into the upper explosion cylinder 7c. This completely blows out the burntcharge in the cylinder 7c. The downward movement of the piston 'v in the cylinder ccompresses the charge of carbureted air in this cylinder until it reaches the lowest limit of the stroke, when the charge is ignited, the operation being continued. indefinitely, with explosions taking place in the cylinders g and alternately, thus driving the shaft b and fly wheel a. During all this time the fan 8 is drawingra supply of cooling fluid through the piston rod 'p and the cylinders g and ls are being cooled by a water jacket or in any suitable manner. The walls of the piston rod being of thin metal and Said rods being connected directly to the three pistons, these pistons and the rod are thus ecie'ntly cooled.

I do not limit myselfvto the kind of c601- ing fluid drawn in through thehollow pipe p as this might be water, air or steam at low pressure.

While I have thus described my invention I wish it to be distinctly understood that I do not limit myself to the exact details shown and described, as these could be varied considerably without departin from the scope of my invention, the main eature of which is to provide two explosion cylinders with a compression cylinder between them, all three located in the same straight line and with a piston rod of such a construction that thecharges of vcarbureted air are admitted from the'compression cylinder into the explosion cylinders alternately, without the use of valves, and a supply of cooling fluid is continuously drawn through the hollow piston rod.

I claim:

1.In a gas engine, the-combination ofcoaxially arranged compression and explosion cylinders, pistons in said cylinders, a hollow piston rod secured to said ypistons and ,ter-

minating at the outer face of said explosion piston in an open end communicating with the explosion cylinder, said piston rod being provided with means for establishing communication between said compression and explosion cylinders, and means for directing a current of cooling air through said hollow piston rod and the communicating explosion cylinder.

2. In a gas engine, the combination of a compression cylinder, explosion cylinders supported co-axiallyon the respective heads of said compression cylinder and provided with `open outer ends, pistons in ysaid cylinders, a hollow piston rod secured to said several pistons and terminating in open ends at the outer faces of said explosion pistons, said piston rod being provided with means "for establishing communication between said compression and explosion cylinders,

` and means for directing a current of cooling air through said hollow piston rod.

3. In a gas engine, the combination of a compression cylinder, explosion cylinders supported co-axially on the respective heads of said compression cylinder and provided with open outer ends, pistons in said cylinders, a hollow piston rod secured tosaid several pistons and terminating in open ends at the outer faces of said excplosion pistons, said piston rod being provi ed with means for establishing communication between said compression and explosion cylinders, a casing extending 'from the open end of one of sald explosion cylinders, and a fan in said casing for directing the current of cooling air through said hollow piston rod.

' In testimony whereof, I affix my signa.- ture, in presence of two witnesses.

C. T. WADE.

Witnesses:

J. W. GREENBLADE, H. C. WAsHnUnN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

' Washington, D. C.