US1221094A - Internal-combustion engine. - Google Patents

Description

-A. G. ROTH. "-INTER'NAL COMBUSTION ENGINE. APPLICATION FILED JAN- 2. I913. Lfimfiwh Patented Apr. 3,1917.

2 SHEETS-*SHEET l- WITNESSES lNVEA TOR Allamey A. G. BOTH. INTERNAL COMBUSTION ENGINE. APPLICATlOI! man JAN, 2. 1913. 1 221 094; Patented Apr, 3, 1917.

2 SHEETS-SHEET 2.

WITNESSES H mmwzwc i ders 8 t idi'lildtfl lllihdi ALEERT G. RUTH, OF DRAKE, NORTH DAKOTA.

INTERNAL-COMBUSTION ENGINE.

Application filed January 2, 1913. Serial No.

To all whom it may, concern."

lie it known that l, [runner G. ROTH, a citizen of the United .llrakc, in the county of lilcllenry and State of North Dakota, have invented new and useful improvements in lnternal-Combustion lhigines, of which the following is a specification.

lily present invention relates to internal i combustion engines of the multiple cylinder type, including a plurality of drive shafts. The principal object of my invention is to provide an engine of the character described in which the cylinders have a common combustion chamber, the inletand exhaust ports of which are controlled by movement ol. one of the engine crank shafts, so that the pistons move in unison for the in take, compression, power and exhaust strokes. With this end in view, I so dispose the cylinders that the axes of their bores converge toward the co'mluistion chamber, and thus atain a further object,-to condense the engine to a minimum magnitude consistent with other desirable features to be hereinafter more. specifically set forth.

in tl 4 drawings, forming a part of this :tion: i

' through a multiple cylinder-engine con- "rd according-to my invention.

is a sectional view on the line 2&2 l. 3 a lfihagiuentary view showing i..isu1 for imparting movement of the cu ue drive shaft to valve actuating mcchanism. at a g'iositive velocity ratio.

in the drawings, where similar characters rei'er iii'isiniilar arts, at designates a base having bearings 'liir crank shafts 5, disposed in parallelism. and prefe'alily pri'ividing a crank case 6 within which the crank pins 7 oi" shafts umke their phases of rotation.

liiouuted uponhase 4 are jacketed cylinhe lie-res of which open into a common combustion chamber 9, with their axes conversing: toward said chamber. lnternicitli iie the cylii'iders S l provide a wall 10 having por s l1 and 12, for intake and exlriustrros tivel of the engine, as will l e herein-after decrihcd.

1 contain reciproeahic pas; .h in. are preferably of the trunk have co necting rods 1-1 pivoted r rennet he rods 14,- are in Specification of Letters Patent.

States, residing at we 1 a central. vertical sectional raised by the cam 27 and the Patented Apr. 3, ild l't 739,7169.

turn connected to the crank shafts 5 through the medium of the'crank pins 7.

The spark plug of the engine is designated by 15, and is preferably disposed equidistant from each cylinder 8 at tlie head of combustion chamber 9. It is to be noted that the pressure faces of pistons 13 are in planes at right angles to the axis of symmetry common to both cylinders and each is not at a right angle to the axis of its respective cylinder.

The ports 11 and 12 are-controlled by valves 16 and 17, respectively, carried by reciprocable rods 18 and 19 respectively. These rods are carried by bearings 20 and 21 and extend intermediate the cylinders 8, longitudinally thereo These valves are normally held closed by yieldable means, such as springs 22 confined between bearings 20 and ahutnients 23 on the valve rods. 4 Disposed with its axis substantially parallel to the axis of shaft 5 is a cam shaft 21, carried by bearings of base 4:. Two cams 26 and 27 are carried by shaft 24c for coaction with valve rods 18 and 1.9, respectively, as through adjustable roller bearings 28 and 29, respectively, whereby the valves may be adjusted to operate as desired, and accord ing' to the various strokes of the engine piston.

Shaft 21- may be driven through mechanism 30, at a positive velocity ratio from one of the shafts 5, this mwyhauism 3O preli erably comprising coiuesuing.gears ll, and 33, adapted to provide a velocity ratio of Q'betw'een shafts 5 and i l, in the example shown.

The operation of the engine is as follows:

As disclosed in Figs. 1 and 2 of the drawing, the pistons 13 of the engine are at the start of the intake stroke and port ll is opened, by means of the raising of valve 16 through cam 26. As the pistons complete the intake stroke, the roller-bearing 28 drops from the throw side of cam 26 and port 11 is closed responsive to action of spring 22 associated with the rod 18 of valve 16. The pistons then pass successively through the compression and power strokes, and when moving toward combustion chamber 9 to complete the exhaust stroke the valve 17 is exhaust port opened for egress of the waste products of combustion.

It is to be noted that the intake and 0X vention;

ignite the charge at a point equidistant frona'- both cylinders, hence, the pistons have 1mparted thereto substantially uniform movement by the expanding gases resulting from the explosion.

Changes in details may be made without departing from the spirit or scope of my inbut, Iclaim: V In an internal combustion engine, in combination. a pair of cylinders having'a common combustion chamber and inclined therefrom in opposite directions, the inner opposed walls of said cylinders having a common vertex, crank shaft casings spaced upon a common base and respectively supporting said cylinders, pistons operable within said cylinders and adapted to have their pressure faces in longitudinal alinementwith one another at the completion of an 'HlWilId stroke and substantially flushed with said vertex, crank shafts operably connected to said pistons, valves mounted at a tween said casings and engaging said valve stems and-means for transmitting motion from said crank shaft to said cam shaft.

I ALBERT G. ROTH;

Witnesses: i H. A. SCI-IRADER,

OSCAR ScHmL Ne.

the said vertex of the inner opposed walls

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