US1364374A - Internal-combustion motor with slide-valve action - Google Patents

Description

F. J. HOLDER AND H STEWART]. INTERNAL COMBUSTION MOTOR WITH SLIDE VALVE ACTION. APPLICATION FILED SEPT. 3. [920 1,364,374 Patented Jan. 4, 1921.

UNITED STATES E AFEZNT OFFICE.

FREDERICK JOHN HOLDER, OF DEPTFORD, AND HARRY .STEWARD, 0F HARLESDEN, ENGLAND, ASSTGNORS OF ONE-HALF 'IO 'WILLIAM ARTHUR THORNTON, OF KENL SINGTON, ENGLAND.

INTERNAL-COMBUSTION MOTOR WITH SLIDE-VALVE ACTION.

Application filed September 3, 1920.

T 0 all whom it may concern:

Be it known that we, FREDERICK JOHN HOLDER, of 19 Trundleys Road, Deptford, S. E. 8, in the county of Surrey, England, and TTARRY S'mwann, of 32 Glynlield Road, Harlesden, l WV. 10, in the county of Middlesex, England, have invented new and useful Improvements in or Relating to Internal-Combustion Motors with Slide-Valve Action, of which the following is a specification.

This invention relates to improvements in internal combustion motors with slide valve action, and it has particular reference to that form or type of engine or motor which has been provided with reciprocating slide valves of a crescent (convene-concave) shape,-or slightly departing from the crescent and in which the sharp edges of their front faces have been removed.

In the drawings hereunto annexed Figure 1 is a part front and part sectional elevation of four cylinders of an engine constructed according to this invention;

Fig. 2 is a sectional elevation on line A, B, Fig. 1; I

Fig. 3 is a part sectional plan on line C, D, Fig. 1;

Fig. l is an enlarged plan of the inlet and exhaust ports;

Fig. 5 is'a sectional elevation on line E, F, Fig. 4:;

Fig. 6 is a sectional elevation on line G, H, Fig. t;

Fig. 7 is an enlarged elevation of the slide valve and connecting rod shown at Figs. 1 and 2;

Fig. 8 is an elevation of the same drawn at a right angle to Fig. 7;

Fig. 9 is a plan of Fig. 8;

Fig. 10 is an enlarged part elevation of a modification of the means for adjusting the valve shown at Figs. 7 and 8,

Fig. 11 a plan of same;

Fig. 12 a plan of the valve without the connecting rod;

Fig. 13 a part elevation of the connecting rod for use with valves shown at Fig. 11;

Fig. 14 is an enlarged part sectional elevation of a valve showing the means for lubricating its back.

Like parts in all the views are marked with similar letters of reference.

Specification of Letters Patent.

Patented Jan. 4, 1921.

Serial No. 408,014.

r llthough in the drawings atFig. 1 four cyllnders are shown we would have it dist nctly understood that our invention is not lnnited to that number but may be applied to one, two, three. four or more cylinder engines.

a is the cylinder, Z) the cover for same, 0, d water jackets, the piston, f the'connecting rod, 9 the cranks, it the crank shaft, 2' the caSmg and j, j the hollow castings or covers respectively over the inlet and exhaust ports of the engine, and provided with a flanged outlet k. i

All the above parts are of the usual and ordinary construction except the construction of the valves and the means for retaining them in their working position.

The cylinder orv cylinders a is or are also fixed to the casing t in the usual and ordinary manner. The inlet and exhaust ports Z and m may be of the same or different sizes or areas, but in the drawings they are shown of about the same area.

In each cylinder are formed two vertical grooves 71, one of such grooves a is shown without a valve therein at Fig. 3. In the drawings although two of such grooves a are shown for each cylinder, we would have it understood this number may be varied as circumstances require. Instead of making these grooves with parallel longitudinal and inclined edges as is usually the case the edges of the said grooves are undercut to form a kind of a dovetail, as shown at 0, Fig. 8, for the reception of a convexo-concave-shaped valve p made of the same thickness of metal in cross section and provided with edges 9 inclined to fit and slide freely in the grooves 11,, and being wider at the back than at the front; a feature of this invention being to obtain an equal distribution of the metal and heat, and at the same time by inclining the edges of the groove a and valves 1? as described the latter will not fall out of position into the path of reciprocation of the piston 6 should the cylinder be tilted or moved out of its working position.

The front face 39 of each valve 10 is curved to fit, and to be in contact with the piston e. The length of the valve will be determined by the position and size of the inlet and exhaust ports Z and m and the grooves or recesses n which are formed in the cylinder are made to extend the full length of the cylinder and to be parallel with its.axis. By inclining the edges 9 of the valve as described not only are they prevented from falling out of their working position but also the sharp front thin edges of the crescent shaped valves, or valves composed of fiat instead of curved surfaces and edges tapering and receding from the face of the valve which is in contact with the piston are dispensed with.

When the inlet port Z is made smaller in size than the exhaust port m, then the valves 10, for standardization purposes, may be of the same size, in which case the valves will overlap the sides of their ports Z more than the sides of the valves used for the exhaust ports m, or when preferred, the said valves may be made of different sizes so as to equally overlap the sides of the said ports.

In the drawings means are shown for adjusting and varying the stroke or movement of the valves 2 so as to make it possible to convert a low compression engine into a high compression engine as well as enabling any required indicator diagram to be obtained. In the drawings two methods of obtaining this object are shown.

At Figs. 7 to 9 the projection r is cast or otherwise fixed to the back of the valves and in this lug or projection r is mounted a fixing s in the shape of an eye bolt.

On the stem of the fixing s is cut a fine gas or other thread, say, for example, but not necessarily so, a twenty-six fine gas thread upon which are mounted the lock nuts 15, t which respectively work against the upper and lower surfaces of the lug or projection 1". One end of the fixing s is bifurcated at 81 for receiving the end of the connecting rod 14, the opposite end of the said rod being connected to one of the cranks 4; formed on the smaller and second crank shaft w which is employed for operating the valves.

It will readily be understood that two crank shafts w are required for each cylinder and that they are mounted opposite to, and parallel with, each other, as shown at Fig. 2. In order to provide for the reciprocation of the valves and for the passage of the said lugs or projections 1", openings a: are provided in the lower portion of each cylinder.

The inner end of the connecting rod a is shown attached to the bifurcated end a by means of a pin y upon which are mounted the lock nuts 2, as shown at Fig. 7.

At Figs. 10 to 13 is shown a modification of the means for adjusting the movement of the valve 3) in which, in addition to the fixed projection 7*, there is a sliding piece 1 adapted to slide in guides 2 formed on, or fixed to, the back of a valve 19. In this instance the projection 1' acts as a stop and also as a guide for the screw spindle 8 provided with a collar 8 The upper end of the screw threaded spindle s is arranged to pass through the block 1 and to be secured in position by means of the nut 3. Lock nuts 4, a, are also provided for securing the sliding block 1 in its adjusted position. In this arrangement the connecting rod it provided with a bifurcated end is attached to a projection 5 from the sliding block instead of to the block The sliding block 1 and the edges of the guides 2 are undercut or inclined, as shown at Fig. 12, for the purpose of retaining the sliding block in its working position.

The requisite motion for reciprocating the valves 19 is imparted from the driving shaft it through spur wheel or pinion 9 thence to the larger spur wheels 8 and 10 when the spur wheel 8 drives spur wheel '7 which is connected to the magneto,not shown in the drawings.

As an additional means for adjusting the reciprocating movement of the valves after adjustment by means of the line thread screw 8, movable pieces 11,-which vary in thickness,may be inserted under the lower flange of the cylinders. These packings will vary in thickness in accordance with the adjustment of the movement that is required.

WVith the above described sliding valves may also be used any suitable means for lubricating them at each upward stroke of the piston and splashing of the oil, as, for example, a number of holes 12 are drilled or otherwise formed in the center of the valve. The said holes are inclined in a downward direction at any suitable angle,- 105 say, but not necessarily so, forty degrees, to the face of the valve, and the said holes are arranged to communicate with oil-ways 13 formed on the back of the valves. These oil-ways are made in any suitable shape, 110 such as, for example, say, in the angular form shown at Fig. 8, or in a semi-circular form, or of a number of diamonds separate from, or joined together that will distribute the oil or other lubricant over the surface 115 of the back of the valve and on to the inclined walls 0 of the recesses n or of the guides 2 when the latter are used.

The oil in the casing 71 is thrown up on the splash principle by the crank on to the cesses with undercut edges formed in its inner surface, a plurality of disconnected, independently movable slide valves each consisting of a plate, of uniform thickness and convexo-concave cross section, fitting and sliding freely in one of said recesses, the longitudinal edges of each valve plate being inclined to correspond to the undercut edges of the recess to prevent the valve from falling out of working position, and means for reciprocating the valves, as set forth.

2. In an explosion motor, the combination of a cylinder having a plurality of longitudinal recesses, each provided with undercut edges, formed therein, a slide valve consisting of a plate of uniform thickness and of convexo-concave .cross section sliding freely in each of said recesses, the edges of each said plate being shaped to conform to the edges of the recess in which it is arranged to prevent lateral movement of the valve from working position, means for reciprocating the valves, and means for effecting independent adjustment of each valve relative to the reciprocating means.

3. In an explosion motor, the combination of a cylinder having inlet and exhaust ports formed therein, a pair of longitudinal recesses formed in the cylinder and having undercut edges, a convex'o-concave shaped slide valve of uniform thickness arranged to slide freely in each recess, the edges of each valve being inclined to correspond to the edges of the recess to prevent them falling out of working position, means for reciprocating the valves, and means for adjusting the position of either of the valves relative to the reciprocating means independently of the other valve.

4:. The combination of a water-jacketed cylinder having vertical recesses formed therein having undercut edges, and inlet and exhaust ports, convexo-concave shaped valves of uniform thickness and having inclined longitudinal edges to fit the said recesses, a fixed and adjustable block on the convex portion of each valve, guides for the adjustable block, a screw threaded spindle having lock nuts thereon for adjusting the block, means for imparting a reciprocating motion to the valves, and for lubricating the same, as set forth.

FREDERICK JOHN HOLDER. HARRY STEWARD.

Witnesses:

JosnrH PASIELA, EDITH BRUCE.

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