US1792062A - Internal-combustion engine - Google Patents

Description

Feb. 10, 1931. Q, BARN'UM I 1,792,062

INTERNAL COMBUSTION ENGINE Filed Jan. 29, 1929 5 Sheets-Sheet l Orr/YA" 6., ,Bar/u/m lNVENTOR ATTORNEY 4/ Feb. 10, 1931. o. G. BARNUM H 1,792,062

INTERNAL COMBUSTION ENGINE Filed Jan. 29, 1929 a sneaks-sheet 2 0/1 17/6 '6. jrm/m INVENTOR B Q 7 ATTORNEY f I Feb. 10, 1931. o. G. BARNUM 1,792,062

INTERNAL COMBUSTION ENGINE Filed Jan. 29, 1929 3 Sheets-Sheet 3 Ol'V/Y/f (1 Barn um INVENTOR ATTORNEY Patented Feb. 10, 1931 UNITED STATES OBVILLE G. BARNUIMZ, OF HOBO, OREGON- IN'TERNAL-COMBUSTION ENGINE Application filed January 29, 1929. Serial no. 385,091."

weight in order that the same may be adapted for uses in devices where a maximum of power is to be obtained with a minimum of unit weight per unit of power. 7

A further object of my invention is to provide a motor giving a maximum number of power impulses per unit rate of rotation of the power shaft thereby promoting the maximum number of power impulses per unit of rotation of the ower shaft.

A further ob ect of my invention resides m an internal combustion engine, free from cams, cam shafts, valves, valve stems, and associated elements used for timing that are inde endent of the main crank shaft.

ith these and incidental objects in view,

the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims, and to a preferred form of embodiment of which is hereinafter shown with reference to the drawings which accompany and form a part of this specification.

In the drawings: v

Fig. 1 is a rear, side view of the assembled motor.

Fig. 2 is a cross section view, taken on l1n e 2-2 of Fig. 1, looking'in the direction indicated.

Fig. 3 is a cross section view taken on line 33 of Fig. 2, looking in the direction indicated.

Fig. 4: is. a fragmentary, sect1onal v1ew, taken on line 4-4 of Fig. 3, looking in the direction indicated.

Fig. 5 is a perspective, side view of one of the connecting rods, securin the two oppositely opposed pistons to eacl i other.

ig. 6 is a side view of one of the pistons.

Fig. 7 is a side view, partially in section F of an assembled motor, comprising an engine of four cylinders, two pairs, each oppositely disposed upon sides of a common engine block.

Like reference characters refer to like parts throu hout the several views.

I prefera ly form my engine of a crank case block 1, having faces 2 and 3, disposed upon oppositely disposed sides of the block, to which air cooled cylinders 4 and 5, are secured by any suitable fastening means, as by cap screws 6. Exhaust ports 7 and 8 are disposed through the side walls of each cylinder and having inlet ports 7A and 8A leading from the interior 9 of the crank case to the 0 cylinder. Pistons 10 and 11 are reciprocably disposed in each of the cylinders with the usual piston rings disposed upon the piston and adapted to engage the inner wall of the cylinder. A wrist pin 12 is disposed within each of the pistons and having a frictionless bearing 13 mounted within the skirt of the piston and against which the wrist pin actuates. Side connecting rods 14 and 15 are secured upon oppositely disposed sides of the pistons and connect the pistons mounted so within the oppositely disposed cylinders into a pair of pistons acting as one unit. Each of the connecting rods has a foot disposed on each end and fastening holes 31 are formed through which fastening bolts 32-pass tofasten the connecting rods to the pistons. Flats 33 are formed at either side of the piston to better connect the connecting rods to the pistons. A shaft 16 runs longitudinally of the cylinder block upon which is mounted a three point cam 17. The cam is substantially, as illustrated in side elevation in Fig. 3 and each of the connecting rods has a slot 18 disposed therein through which the main shaft 16 passes. The pistons within their respective cylinders are precisely positioned through the action of cam rollers 19 and 20. The cam rollers 19 and 20 are indirectly mounted upon wrist pins through the action of frictionless bearings 13 and the connecting rods are of a length to maintain each of the rollers in intimate contact at all times with the face 21 of the cam thereby positioning the. respective pistons within the cylinders without any piston slap to precise position in their respective cylinders at all times. A dual ignition is provided within the head of each of the cylinders of the usual type, as illustrated at 22, 23, 24 and 25. The walls of the cylinder block fit closely and in tight relationship with the side walls 26 and 27 of the cam, and the three high points of the cam form an intimate contact with the inner peripheral wall 28 of the cylinder block. Therefore, at each intake of the cycle of operation the fuel charge trapped within the spaces is under substantial pressure within the crank case and the gas flows under pressure into the explosion chamber of the cylinder for compression and use. Hubs 29 and 30 are disposed upon either side of the cylinder block and frictionless bearings are disposed within the hub, through which the shaft 16 passes. A thrust ring 34 is disposed upon the shaft and a ball thrust bearing 35 is disposed within a suitable housing disposed within the hub. A removable plate 36 is secured to the hub by fastening bolts 37. A housing 38 is formed upon the hub 30 in which the gears 38A and 39 are disposed. The gears 38 and 39 are in registerable engagement with the master timing gear' 40 disposed upon the shaft 16. Where a multiple cylinder engine is required and to better balance the same pairs of cylinders may be made as illustrated in Fig. 7. Best results are to be obtained with this type of engine where the pairs of cylinders are oppositely disposed and wherein each pair of the cylinders are arranged in parallel with a common central shaft 16 running therethrough with the three point cams mounted upon the shaft. Carbureted fuel is admitted through the inlet ports 41 leading from the carburetor into the crank case of the motor block, and the rotation of-the cam within the block forcing the piston outwarddraws the fuel charge into the motor block and from there is admitted into the explosion chamber under substantial pressure. Lubricating oil is carried within the gasoline and such lubrication lubricates the elements disposed within the motor block. I have here shown a three point cam and in so doing, three compartments are formed within the block. 'Each compartment being substantially larger in volume than the fuel charge to be admitted into the cylinder. On the exhausting of the cylinder and the inward drawing of the piston Within the fired cylinder, the fuel charge carried within the block compartment is compressed to such an extent that the fuel charge enters the cylinder in the position of the piston in Fig. 2 and in Fig. 3 so that the fuel charge enters the exhausted cylinder under substantial pressure.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form of embodiment herein shown and described, as it is susceptible of embodiment in various forms, all coming within the scope of the claims which follow:

What I claimis:

1. In a device of the class described, the combination of a primary block cylinder supporting faces disposed upon oppositely disposed sides of the block, cylinders removably secured to the faces, pistons reciprocably disposed within the cylinders, hubs disposed upon opposite ends of the cylinder supporting block, a central shaft running longitudinally of the block, the side faces of which is intimately in contact with the inner faces of the block and the points of the cam contacting with the inner peripheral surface of the block, connecting rods removably secured to the pistons and having an elongated slot disposed central of the connecting rod through which passes the main central shaft, inlet ports connecting from the interior of the block and leading to the interior of the cylinder and exhaust ports leading from the cylinder and extending through the cylinder walls.

2. In a device of the class described, the combination of acrank case block, cylinders removably secured to oppositely disposed faces of the block, pistons reciprocably disposed within the cylinders, an inlet port leading from the interior of the block to the interior of the cylinder, exhaust ports leading from the interior of the cylinders through the cylinder walls, firing plugs disposed within the head of each cylinder, a central shaft running longitudinally of the block and disposed within suitable bearings housed within the block, a multiple pointed cam mounted upon the shaft and rotated within the block with the sides of the cam in intimate contact with the inner side walls of the block and the points of the cam contacting with the inner peripheral surface of the block, side connecting rods secured upon their oppositely disposed ends to the pistons and each side rod having an elongated slot through which the main central shaft passes and a thrust ring mounted upon the shaft and a ball bearing mounted within the block to absorb the end thrust of the shaft.

3. In a device of the class described, the combination of a crank shaft cylinder supporting block, pistons reciprocably disposed within the cylinders, side connecting rods secured upon their oppositely disposed ends to the pistons to form the pistons into pairs, said side rods having elongated slots disposed their ends through which the shaft passes, a multiple pointed cam disposed within the block and having the points in intimate contact with the inner wall of the block, said cam being mounted upon the central shaft,

rollers rotatably mounted relative to the pistons upon wrist pins disposed Within the pistons and adapted to intimately engage the outer periphery of the cam and rotate the shaft as the pistons are reciprocated by power impulses imparted to the pistons by explosions within the cylinders.

4. An internal combustion engine comprising a crank case block, a plurality of cylino ders removably secured thereto. said cylinders arranged so that each is oppositely disposed another one of the cylinders and having their bores in alignment, standard pistons disposed therein, a shaft running longitudinally of the crank case block, an equilaterally shaped triangular cam secured to the shaft, said cam adapted to have its points ride in intimate contact with the inner wall of the crank case block permitting the compression 2 of the fuel prior to its entry into the cylinders, openings disposed through the crank case block, inlet ports disposed on the side of each cylinder, said ports directly aligned with the openings disposed through the crank case block. a Wrist pin disposed Within each of the pistons, an anti-friction bearing mounted within the skirt of ear .1 piston against which the wrist pin is adapted to be actuated, cam

rollers disposed about said anti-friction bear-' so lugs and adapted to always ride on the outer periphery of the cam, pairs of connecting rods removably secured to pairs of pistons, said rods each having a slot disposed centrally thcrethrough and through which the central shaft passes, and means mounted Within the crank case block for absorbing the end thrust of the shaft.

ORVILLE G. BARNUM.

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