US1347300A - Valve-control mechanism - Google Patents

Description

E. G. SMITH. VALVE CONTROL MECHANISM. APPLICATION FILED SEPT. 19, I919.

Patented July 20, 1920.

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E; G. SMHH. VALVE comm MECHANISM.

I, I APPLICATION lLED SEPT. 19. I919. 1,347,300. Patented July 20, 192

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UNITED STATES! EARL G. SMITH, OFYCRANDON, WISCONSIN.

Specification of Letters Patent.

jVALVE-CONTROL MECHANISM.

Patented July 20, 192-0.

Application filed September 19, 1919. Serial No. 324,746.

To all whom it may concern:

Be it known that I, EARL G. SMITH, a citi zen of the United States,;residing at Crandon, in the county of Forest, State of Wisconsin, have invented a new and useful Valve-Control Mechanism and I'do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others skilled in the art to'which it appertains to make and use the'same. I The invention relates to valve control mechanism for internal combustion engines and'has for its object to provide cam means for operating a lever which lever controls the exhaust and ignition so that said engine may be operated to the right or to the left.

A further object is to provide a valve and ignition control lever which may beshifted from one cam to another thereby reversing the engine. Also to. provide gear means operative by the crank shaft for revolving the cam, thereby operating the control lever.

A further object is to provide thecontrol lever with a pivoted member having on its free end a roller adapted to be rotated by the cams and prevent friction between the cams and the lever andto provide a pivoted lever for actuating the shifting from onecain to the other. 7 v a v lVith the above and other objects in view the invention resides inv the combination and arrangement of parts as hereinafter set forth,shown in the drawings, described and claimed,"it being understood that changes in the precise embodiment of the invention may be made Within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a side elevation of the valve controlling mechanism.

Fig. 2 is a plan view of a portion of the cam gear and the end of the pivoted lever,

' parts being broken away to better show the structure.

Fig. 3 is a detail view of the cam gear.

Fig. 4 is a vertical sectional view through the cam gear.

Referring to the drawings, the numeral 1 designates a fly wheel carried by a crank shaft 2 of an internal combustion engine and 3 a cam gear which meshes with a gear 4 secured to the crank shaft 2. Cam gear 3 is rotatably V mounted in a bearing 5 of a bracket 6 which may be secured to the en- 7 gine base or to any other suitable support.

The outer face of the cam gear 3 is provided with cams 7 and 8 which are preferably formed integral with the cam gear and with each other. Cams? and Sare at right angles to each other and their longitudinal axis being at about 90 degrees from eachother. Cam 7 is the cam which normally operates the valve and ignition spark, that is, when the engine is turning to the right and cam 8 isthe cam which isutilized for operating the exhaust valve and ignition spark whenthe engine is turning to the left. Slidably mounted in a bearingv 9 which may be carried bythe engine casing or supported in any other manner isa valve rod 10, which controls the exhaust valve of the engine, said valve rod also having pivotally connected thereto as at 11, a rod 12, which controls the spark. The lower end of the lever 10 has pivoted thereto as at 13 a lever 14, which lever 14% is provided with a roller 15 on its lower ends, said roller being adapted to engage the camming surfaces of the cams 7 and 8 thereby operating the exhaust valve andthe ignition spark. lVhen the roller 15 is in engagement with the cam 7, the

valvero d 1 and rod 12 which controls the ignitionspark will so operate as to work the spark'and exhaust valve so that the engine will turn to the right. When it is desired to reverse the engine, that is cause the same to turn to the left, pivoted lever 14 is shifted laterally until theroller 15 engages the camming surface of the cam 8 thereby changing theposition of the valve rod 10 and ignition rod 12, so that the cam 8 as it revolves in the opposite direction will cause the engine to turn to the left. It is to be understood that the type-of engine to which the mechanism is applied has an automatically controlled intake valve. The shifting of the pivoted lever 14 is done by a lever 16, the lower end of which is pivoted as at 17 to a bracket 18 carried by the engine base or in any other suitable position. Lever 16 is provided with a yoke 19, which engages the pivoted lever 22 in a segment 23carried by the bracket 18.

Detent 20, when it is desired to shift the roller 15 to the cam 8, is raised and the lever 16 moved outwardly until the detent 20 drops into engagement with the'notch 24 of the segment 23 thereby securely holding the :roller in proper alinement with the earn; 8.

Valve rod is normally under tension of a spring 25, which spring will'causet'heroller to remain in engagement with the cams 7 and 8 so that said roller will normally follow the camming surfaces of the cam.

However, spring maybe located in any other convenient location, or when the exhaust rod 10 is connected directly to the ex hau'st valve which exhaust valve is normally closed by a valve spring,the spring 25 may be eliminatedand the valve spring utilized for "maintaining the roller 15 in engagement with the cams 7 and 8.

Bearing 9 is a loose bearing and trans.-

I versely is of considerably greater width than the width of the push rod so that the movement of the pivoted lever 14: from one cam to the other may be accomplished.

From the above it will be seen thatia shift ing mechanism is provided whereby the reversing of the engine may be accomplished quickly and one wherein cams are utilized for operating the exhaust and ignition when ing to the left.

one of said cams being adapted to operate the valve and ignition control rods for turning the engine'to the right, the other cam being adaptedto operate the exhaust valve control rod and the ignition control rod so as to operate the enginetothe left and means whereby the operating valverod may be shiftedfromone cam tothe other. i p reversing mechanism for internal combustion-engines comprising an exhaust control rod'and an ignition control rod connectedthereto, said exhaust controlrod be,- ing slidable in a'bearin'g, the lower end of said exhaust control rod havinga lever :pi'v

oted thereto, .a cam gear meshing with a gear 5 on the crank shaft, said cam gear being pm vided withf'a" pair of 'cams, one of said cams being adapted to reciprocate the exturnrto the right, the other cam being adapted to operate-the exhaust valve control rod so that the engine will turn tothe left, a lever connected to the pivoted lever Where by the end of pivoted lever 'may be moved from engagement with one of the cams and into engagementv with -the other and. m n wh reby the pivoted le el? may be locked inengagementfavith either of" the CYZ II S- 7 3 A reversing mechanism for internal combustion engines comprising exhaust controlfrod-and' anignition control rod eonne tcd t ere o, sa d xhaustfcontr l r d eing slidable in a transversely enlarged bear-j ing',the lower endof said exhaust; control rod having a lev r pivot d her og ic gear me h ng Wit a gear on h c k h ft of the engine, said cam gear being provided with a pair of camsat 90 degrees from each 'haust control rod-so that the engine will other, one of said cams being adapted to re- 7 ciprocate the exhaust control rod and'its ig nit' on control rod for operat ng the engine so that its crank will turntoward the right,

thebth ricam eingatl p e d t p t i 7 rod so that the engine willturn to the left,

the pivoted lever having its 'low'enencl a roller adaptedfto be placed in engagement Vwiththe cams'of the cam gear, a transversely pivoted lever connectedto the pivoted lever,

said transversely "pivotedfllever' forming vvalve control rod [and the @ignition control meanswhe're'by the'pivoted' lever may be j shifted from one cam face to theothe'r and detent means carried by thetransversely pivoted leverwhereby said'lever may be locked so thatroller. at theend oflthe pivotedleveri may be locked into engagement'with the cam faces; V

. "'l I In testimony LWheIQOfIf have signed my name tofthisfs'pocification in the two subscribing witnesses.

WVitnessesi V vj 1 "FRANK S -roaming"; H. H. B-INcnAi'n x presence of

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