US1718775A - Gas engine - Google Patents

Description

June Z5, 1929.

J. A. CHARTER GAS ENGINE Filed March 31. 1921 ansa. oriana-nn, or' cursado, rnnrn'ors.

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appuaanaalea aren ai, rear. sanar no. atraer.

rlhis invention relates to gas engines ot ythe general type illustrated in my prior Pat' ent No. 1,106,782, dated August 11,1914, in which a rotatable sleeve valve is mounted between inner and outer cylinders, the inner cylinder being capable ot'` longitudinal excarries the the materials themselves, but the amount of machine and foundry work required by making the inner cylinder in two parts make it possible to discard one oi them either when worn out in actual use or injured in construction work without it being necessary to replace both parts. The invention Jfurther consists in features and details of construction hereatter more fully set forth in the specification and claims. w

rlhe-single figure' of the drawin shows a conventional form of outer cylin er 2, Water jacketed at 4,'carrying on its lower end crank case 6 within which is mounted the crank shaft mechanism 8 including the connecting rod 10 and attached pistonv12.l Rotatably mounted is the, for the purposes of this case, conventional rotatable sleeve valve 14, driven by gear mechanism 16 propelled by the worm 18'driven from the crank shaft by the gearing 20. Inside of this rotatable sleeve, is freely slipped from the top, a nonthreaded inner cylinder 22 which is at its lower end conventional as to this case in that it slides vertically with reference to centering blocks 24 and 24a provided for the purpose located at the upper end of the crank case. Especial attention is called to the fact that the twoblocks 24 form the lower end of the cylinder 2 4; that the upper block, preferably 'made of hard steel, forms the bottom or thrust seat for the gear 16 carrying the sleeve valve 14, the oil which necessarily encloses said gear being sealed in by said ring 24; also that the inner cylinder '22 slides through both said rings and that its lower `tire length vall times to lover and embracing flange on the inner it tightly in place within the notch 28 end extends to-but not below-the lower ring 24 by which it is guided and centered in relation to the bore of the cylinder 2-4 provided with water jacket 4.` 'lhis construction in combination with the means tor sustaining the upper end of cylinder 22, else- Where described, insures accurate centering of all parts of the inner cylinder while permitting its necessary longitudinal expansion, thus insuring a space or cavity between the inner and outer cylinders extending the enot the valve ci proper size at insure proper rotation of the valve 14. lli' the inner cylinder is not so centered the side thrust ot the piston due to angular position of the connecting rod will, yin certain positions, force the inner cylinder against the sleeve valve and partially or wholly lock it.

The upper end ont this inner cylinder 22 is in accordance with the improvement ot this invention provided with an angularly outwardly extending llange 26 of greater diameter than the bore ofthe outer cylinder against which sleeve valve 14 rotates so that i it rests in an annularly cut recess 28 preferf ably of cylindrical circumference whereby the weight of the inner cylinder22 is carried on a ledge orvshelf 30 formed in the end of the outer cylinder while the inner cylinder l is centered against lateral movement by the outer circumferential wall of the cut 28. For the purposes of this centering it is of great importance that the outer circumference of liange 26 be concentric with the outer cir4 cumference of the inner cylinder.

The upper end of the inner cylinder is closed byfavnon-threaded cylinder head 32 extending any desired predetermined distance into the cylinder and having integral laterally extending llange or lug 34 litting the upper horizontal cylinder and holding provided or it and on the shelf 30 provided for it, said llange or lug being provided with a suitable retaining device, that shown in the drawing being the conventional lag bolts 36. i

The cylinder head is provided with a conventional form of water jacket 38.

By the use of this construction the inner cylinder 22 can be made of one material preferably a hard material, while the cylinder head 32 can be made of an entirely different material, usually a softer and more workable one, or it can be madeof aluminum for lightness, a material which wouldv not be feasible for the inner cylinder 22.

With the inner cylinder made se arate from the cylinder head it is much c eaper and easier to accurately machine its upper flange'26 to fit into the recess-28 provided for it, to thereby accurately center the inner cylinder with reference to the outer cylinder, than is possible where the inner cylinder is made integral with the cylinder head and the securing flange, as in'prior constructions.

' The lower end of outer cylinder 2 terminates in inturned flange 78 against which rings 24 and 24:n bear and 'seal thus forming oil space 80 filled with oil in which gear 18 rotates.

Having thus described my invention, what I claim as new and desire to secure by Letter 1. In `mechanism of the class described,l an outer cylinder having at each end anannular v'notch of greater diameter than the bore o the cylinder, and concentric therewith,v a smooth bore untlireaded innerv cylinder 4 sufliciently smaller than the outer cylinder to take a sleeve valve between them, a 4flange on one end of the inner cylinder centered in said notch in one end of the youter cylinder, an unthreaded Water j acketed plug shaped head 32 entering and bearing against the inner wall of theinner cylinder securing said flange in said position, the length of said unthreaded plug being substantially equal to the diameter of the bore of the inner cylinder to thereby present an effective seal, means securing said head in place, a positioning ring inserted in the annular notch at the other end of the outer cylinder enclosing and centering the opposite end of said inner cylinder,'a secondring in said notch rigidly secured to the .cylinder Wall retaining the first ring in position, there being'formed adjacent said first ring an annular oil space closed by said ring, said oil space being of greater diameter than the bore ofthe outer cylinder, a sleeve valve rotatable Abetween the inner and outer cylinders, rotating in unison with a gear entering and running in said oil space within the outer cylinder, and positioned lengthwise by the first ring and by the flange on the inner cylinder.

2.' A-gas engine 'comprising an outer cylinderhaving, at each end an annular notch of greater diameter than the bore of the cylinder,

a smooth bore Unthreaded inner cylinder arranged within the outer cylinder, a sleeve valve arranged between the inner and outer cylinder, a flange carried at one end of the inner cylinder .and centered in a notch at one end of the outer cylinder, an Unthreaded water jackete'd plug securing' said flange in said position, a ositioning ring inserted in the annular notc at -the opposite end of the outer cylinder for enclosing and centeringthe opposite end of said inner cylinder, ay second ring in said notch rigidly secured -tol the first rin the cylinder wall and retainin in position, there being formed adjacent sai first ring, an annular oil space closed byzsaid ring, said oil space having greater diameter than the bore of the outer cylinder, said sleeve valve being rotatable between the inner and outer cylinders, and a gear entering and y running in said oil space within the outer cylinder, and rotating in unison with the sleeve valve, said sleeve. being positioned lengthwise by the first ring and by the flange on the inner cylinder;

A gas engine comprising an outer cylinder having, at-each end, an annular notch of greater diameter than the bore of the cylinder and arranged concentricall with the cylinder, a smooth bore unthrea ed inner cylinder sufficiently smaller than the outer cylinder to receive a sleeve valvebetween the cylinders, a flange formed in one end of said inner cylinder and centered in a said notch at one end ofthe outer cylinder, an unthreaded A water jacketed plug shaped head entering and engaging the inner wall of the inner cylinder for securing said flange in said position, means for securing said head in place, a positioning ring arranged in the annular notch at the opposite end of the outer cylinder, said positioning ring embracing and centering the opposite end of said inner cylinder, a second ring'arranged in said notch and fastened -to the cylinder wall to retain the first ring in place, an annular oil space formed and arranged in said outer cylinderadja- JAMES A. CHAR-TER.

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