US1076877A - Gas-engine. - Google Patents

Description

G. D. EIGHMIE.

GAS ENGINE.

APPLICATION FILED SEPT. 15, 1910.

1,076,877. Patented 00n.28,1913.

IOLUMBIA PLANDGRAPM Co.. WASHINGTON, 11;. c,

GEORGE D. EIGI M133, F NEU] YORK, N, Y.

GAS-ENGNE.

Application led Eepteniher 15, 191e.

Specification of Lett-ers Pa tent.

i'waten tod Ort. $38, 1913.

Serial No. 5232,'2?.

- tain new and useful l'mprmfements in t'as Engines, ot which the following is a tull, clear, and exact specification, such as will enable others skilled in the art to which it appertains to malte and use the saine.

My invention relates particularly to twocyele gas engines of the base otunpression type, and it has tor its object to secure an effectual scave1if ing}, of the cylinder and the introduction oct the explosive charge properly in the working chamber Without confusion with the burnt gases. This end is attained by a certain novel construction and organization of the engine, which will tully appear from this specification and be particularly pointed out in the claims. l? or this purpose, reference is now had to the a-ccompanying drawings, which show one einbodiment orf my invention.

ln these drawings :-'li`if,ui:e 1 is a vertical section ot my improved engine; Fig. i2 is a sectional view taken on the line 2m@ ot Fig. 1, looking in the direction ot the arrow.

ln these drawings, similar' reference chan aoters designate similar parts.

10 indicates the cylinder or working,` chainber"`of the engine, which is extended down ward to torni an inclosed base lil, through which extends the crank shaft 12 in the usual manner.

1-l indicates the connectingl rod and 15 the workin g piston ot the engine, which is here shown as ot' the trunk type, adapted to overrun, in top center' position, the admission port 16 and to overrun, in bottoni center po sii-ion, the exhaust ports 17.

To provide tree inlet and outlet of the 4rases and pre-vent wire-drawing and throt-- tiling thereol', the inlet and exhaust port- s 16 and 17 are caused to extend completely around the cylinder, thus providing1 an extremely large port area, conducive to high speed operation ot the engine. Said ports are surrounded by manifold boxes, 18 and 1), the former having suitable connection with the source of the explosive mixture and the lat-ter having suitable connection with the means for disposing oi the exhaust. gases. The piston 15 is toi-ined with a large central opening from which extends upwardly a tubular projection 2() which, with its ports 27 is termed a valve. This valve 20 tits snugly in a dome 21 rising' :trono the cylinder head. This dome 21 and valve 20 h avo a iding1 tit` and torni a ,das-tight. and air-tight joint between them. The interior ot' the valve 2O has a hollow plug 25 fitting snugly therein with its upper end somewhat enlarged so as to tit snugly in the dome 21, Whereit is above the valve Q0. The plug' 25 is fixed in place by a suitable pin or other means 29 and is provided with packing ringsI 26 to engage the inner walls oit` the valve E20 so as to maire a gas-tight joint with the saine. The lower end of the plug 2:5 is eonical. The cylinder head ot the cylinder 10 is enlarged or bulging, as shown at 28 so as to provide a chamber to receive gas under pressure from the crank case 11 through the ports 2'? when the piston. 15 is al;` the lower limit of its inovei'nent.

ln view of the foregoing' descrilition, the operation ot my improved engine will be readily understood.

A ssuining;` the parte to be as shown in Fig. 1 ot the drawings and the spa-rl: plug or other ionitingl device in condition 'for use, the cycle is as lfollows: The explosive mixture ot air and gas passes through 'the admission ports 16 into the crank case. he piston 15 is then lowered and this mixture is tl'lereby compressed. ils soon as the mix-- ture is fully compressed and the piston lo is at the bottoni ot' its movement, the charge. which has just been exploded, escapes through the port-s 17, and the fresh .mixture in the crank ease escapes through the ports 27 into the space above the piston 1li and more particularly into the enlarged part 28. This 'fresh gas, by passing; as above de scribed, into the top ot the cylinder, torce? the spe-nt gases to escape at the bottom there of through the ports 17, so that the cylinder is ettectually scavenged. The piston l5 theo rises and f vompresses the explosive mixture and at the ini-oper time this mixture is exploded, the piston is driven downwardly and at the end of the stroke the charge is exhaustod through the ports 27 and forced out by the incoinii'in f rharge as above de scribed.

hWhatl claim is:

1. A two-cycle gas engine adapted to have admission and exhaust respectively at its workingl cylinder ends, a. Working piston with a port through it, a tubular `valve integral with said piston and open at its ends carried by said piston, a housing in which the valve ogerates, a valve box having a conical lower end mounted rigidly in said housing, said valve being adapted to embrace said box in its reciprocatory movement and said housing being adapted to embrace said valve.

2. A two-cycle gas engine adapted to have admission and exhaust respectively at its working cylinder ends, a working piston with a port through it, a tubular valve integral with said piston and having its upper end terminating in fingers and a housing in which the valve operates, a valve box having a conical lower end, said valve being adapted to have air-tight Connection with said housing and said valve box during its reeiproeatory movement and to permit admission at the bottom center piston position.

in testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE D. EIGHBIE.

lVitnesses FRED C. MARTIN, V. BARRIRE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

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