US682880A - Valve-gear for explosive-engines. - Google Patents

Description

No. 682,880. Patented Sept. I7, 190:. mum.

VALVE GEAR FOR EXPL USIVE ENGINES.

(Application filed Feb. 28, 1901.) (No Mode!) /7 Fifi WITNE SE5- INVENTOR- D. 0, 1n: Norms PETERS c0. PHOTQUWO wuumm'ou 2 Sheets-Sht I.

No. 682,880. -Pat 6nted Sept. l7, I90l.

J. MGNEIL.

VALVE GEAR FDR EXPLUSIV'E ENGIKES.

7 (Application filed Feb. 28. 1901.)

\(No Model.) 2 Sheets-Sheet 2.

WITNE'S ES. INVEINTOR- I W14 J W aid? THi noluus PETERS co. worouma. Maximum 0. c

improvements.

UNITED Y STATES PATENT' OFFicE.

JAMES MCNEIL, ()F ALLEGHENY,PENNSYLVANIA.

VALVE- G EAR F OR E XPLOSIVE-E NGINES.

SP ECIFIGATTON forming part of Letters Patent No. 682,880, dated September 17, 1901. Application filed February 28. 1901- Serial No. 49,274. (No model.)

T0 at whom it may concern:

Be it known that I, J AMES MONEIL, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Gas-Engines, of which the following is a specification.

This invention relates to gas-engines, and

the primary object thereof is to improve and simplify the engine by dispensing with all spring-actuated valves, tripping mechanisms, 85c. usually employed for controlling the admission and exhaust ports, and in lieu thereof I provide a rotary double valve adapted to be actuated by the engine-shaft.

The invention consists in the novel structural features and combination and arrangement of parts hereinafter fully described and claimed, and illustrated by the accompanying drawings, Wherein Figure 1 is a view,-partly in elevation and' partlyin section, of anengine embodying my the upper portion of the engine, the sectional portion of said View being taken on line2- 2 of Fig. 1. Fig. 8 is a view similar to Fig. 2, taken on line 3 3 of Fig. 1. Fig. 4 is a plan "iew, the cap-plate of the valve-casing being removed. Fig. 5 is a detail viewof the valve. Fig. 6 is a diagrammatic view illustrating the operation of the valve.

Referring to the drawings, 2 represents the cylinder; 3, the crank-shaft; 4, the pistonrod, and 5 the piston.

6 is ,the cylinder-head, and cast integral therewith is the elongated and transverselycircular valve-casing 7. Rotatably mounted within this casing is the cylindrical valve 8, having at one end a stem 9, carrying sprocketwheel 10, and leading from this wheel is chain 11 to wheel 12 on short shaft 13, said'shaft also carrying gear 14,, which meshes with-pinion 15 on crank-shaft 3. The valve-casing and cylinder-head are formed with the vertically-alining inlet-ports a. a and correspond, ing exhaust-ports b b, and cooperating with these ports are inlet-port c and exhaust-port d of valve '8. All of said ports are of corre-. sponding length and width. The top of valvecasing 7 is faced off to receive cap-plate 16,

formed with tapered ports 17, with which the Fig. 2 is a similar view of,

double the diameter of pinion 15, the engine crank shaft makes four revolutions while Valve 8 is making one, and in 1683,1116 interval the piston makes eight strokes. 'An engine of the four-cycle type being here shown,

a complete operation is effected by fourv strokes of the piston or while valve 8 is making half a revolution. valve 8 in positions shown in Figs. 1, 2, and 3, all of said views corresponding, the piston With piston 5 and has completed its fourth or exhaust stroke this point in the operation valve exhaust-port d has just passed from in line with fixed ports b b, as seen in Fig. 2, and valve inlet-port c is about to uncover fixed ports Ct 64, as in Fig. 3. Ports '0 and d of the valve are thus arranged so that either the inlet'or exhaust will be com pletely closed before the other starts to open.

As before stated, ports a, a, and c are of corresponding width, as are also ports 19,19, and d.

Hence the periphery of valve 8 advancesadi'stance equal to double the width of port a or of port 01- at each stroke of the piston. Thus on the exhaust-stroke fixed ports I) band port 01 are first completely opened by the first half of the stroke and then completely closed by the latter half thereof; On the next or charging stroke said operation is repeated by ports a, a, and 0. During the third or compression stroke and the fourth or explosion stroke all ports are closed; but at the completion of the fourth stroke exhaust-port d of valve 8 is again ready to register with fixed ports 17 b as soon as the next or exhaust stroke begins. In diagram, Fig. 6, the dotted lines ofport d indicate its position at the beginning of the exhaust-stroke and the-full lines at the completion of said stroke, the latter position being indicated by letter E. At the completion of the first or charging stroke its position is indicated by F, at the completion of the compression-stroke by G, and completion of the explosion-stroke by H. The valve 8 is thus double in that it controls both the and is about to begin the charging stroke. At

inlet and exhaust and double acting in that the valve-ports'operate alternately in reverse positions.

While I have thus shown and described the valve and its operation with considerable exactness, it will be understood that this is only an embodiment of the principles underlying the invention, which may be practiced or applied in a number of ways without departing from the spirit and scope of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination of a.- cylinder, a cylindrical valve-casing formed with cylinderports a and b, the casing having two ports a and b diametrically opposite ports a and b respectively, the ports a a and b I) being in lines parallel with theaxial line of the easing, acylindrical valve formed with throughand-through ports a and cl in the planes of ports a a and b b respectively ports a and (1 being disposed in different radial lines, and inlet and exhaust connections for ports a and b, substantially as shown'and described.

2. The combination of a cylinder, 3; piston,

a crank-shaft operatively connected to the piston, a cylindrical valve-casing formed with cylinder -ports a b the casing also being formed with ports a, b diametrically opposite ports a b, a cylindrical valve formed with the through-an'd-through radial ports 0 d, all of said ports being of corresponding width and the peripheral length of the valvebeing sixteen times the width of any one of said ports, the distance between lines extending longitudinally of the valve on the periphery thereof and intersecting adjacent sides of ports a and (1 being the same as the width of one of said ports, and mechanism'forimparting one revolution to the valve for every four revolutions of the crank-shaft, substantially as shownand described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses JAMES MCNEIL.

\Vitnesses: I

J. M. NEsBrr, J. H. LAING.

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