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Publication numberUS1514280 A
Publication typeGrant
Publication dateNov 4, 1924
Filing dateOct 3, 1922
Priority dateOct 3, 1922
Publication numberUS 1514280 A, US 1514280A, US-A-1514280, US1514280 A, US1514280A
InventorsGirvin Fitzhugh B
Original AssigneeGirvin Fitzhugh B
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Internal-combustion engine
US 1514280 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

F. B. GIRVIN INTERNAL COMBUSTION ENGI NE 1922 2 Shee1sSheet 1 Filed Oct. 5,

QMQMM New. 4 1924. 1,514,289

' Y F. B. GIRVIN INTERNAL COMBUSTION ENGINE Filed Oct. 5, 1922 2 sheets-sheet 2 Patented Nov. 4, 1924.



Application filed October 3, 1922. Serial No. 592,130.

To all whom it may concern: I

Be it known that I, FrrzHUGH B. GIRVIN, a citizen of the United States, residing at Georgetown, in the county of Williamson. State of Texas, have invented a new and useful Internal-Combustion Engine; andI do hereby declare the following to be a 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.

The invention relates to multiple cylinder internal combustion engines, and has for its object to provide a device of thisv character comprising elongated cylinders, in the opposite ends of which pistons are slidably mounted and connected tocrank shafts at opposite sides of the cylinders, which crank shafts have connecting rod connections whereby they will be rotated in unison by the various pistons. Also to provide rotary intake and exhaust valves disposed aboveand below the cylinders intermediate the ends thereof whereby the single charge will operate the pistons at the opposite end of each cylinder.

A further object is to provide gear means for controlling the rotation of the valves whereby different speeds of rotation may be obtained, thereby allowing the speed of operation of the engine to be controlled.

\Vith the above and other objects in view the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in the drawing, describedv 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 top plan view of the engine showing a portion of the casing broken away to better show the structure.

Figure 2 is an end view of the engine, part being broken away to better show the structure.

Figure 3 is a transverse sectional view through the engine taken on line 33 of Figure 1.

Figure 4 is a perspective view of one of the rotary valves.

Figure 5 is a vertical transverse sectional view through one of the cylinders taken on line 55 of Figure 1.

Referring to the drawings, the numeral 1 designates the casing of the engine, which casing is provided with a plurality of elongated cylinders 2, in which cylinders, at the opposite ends thereof are slidably mounted pistons 4. The pistons 4 move outwardly and inwardly towards each other and are provided with connecting rods the outer ends of which are connected to crank shafts 6 through the medium of cranks 7. It will be seen that when the pistons are forced outwardly that the cranks 6 will simultaneously rotate thereby imparting rotation to the fly wheels 8. The cranks 6 are connected together adjacent their ends by means of connecting rods 9 which are connected to cranks 10, thereby insuring accurate and simultaneously timed rotation of the shaft. The shafts 6 are pro vided with crank engaging members 11 for the reception of a crank handle 12, whereby the engine may be started in the usual manner. Disposed above the cylinders 2 and rotatably mounted in a tapered bearing 12 is a tapered rotary intake valve 13, which valve is provided with a plurality of transversely disposed intake ports 14, which during the rotation of the valve comes into the registration with the ports 15 in the casing 1 and allow passage of fuel through the intake pipe 16 to the cylinders 2, intermediate their ends, and between the pistons 4 therein, where the fuel will be ignited by the spark plugs 17 and the piston simultaneouslyforced outwardly. The valve 13 is provided with a spring 18 for maintaining the same tight within the tapered bearing 12. Disposed below the valve 13 and the cylinders 2 is a rotatably tapered exhaust valve 19, similarly shaped as the valve'12 and provided with a plurality of exhaust ports 20 extending therethrough, which exhaust ports, are during the rotation of the valve 19 moved into registration with the exhaust ports 21 in the casing 1, ports 20 being positioned whereby when the pistons 4 start inwardly on their exhaust stroke they will register with the ports 21 and allow the exhaust of the gases through the exhaust pipe 22, which exhaust pipe is provided with a drain cock 23 for allowing drainage of the engine, especially when steam is used instead of an explosive fuel.

Secured to the outer ends of the valves 13 and 19 are gears 23, which gears mesh, with anidle gear 24:, therefore the gears 23 will simultaneously rotate when the idle gear 24 is rotated. Secured to the idle gear 24 is a bevel gear 25, which bevelled gear 25 is adapted to be engaged by one of the bevelled gears 26 of the transversely shiftable shaft 27 rotatably mounted in bearings of the easing. The shaft 27 adjacent its outer ends is provided with bevelled gears 28, which are adapted to be moved into and out of mesh with the small bevelled gear 29 carried by one of the crank shafts 6, and a large bevelled gear '30 carried by the other crank shaft 6 for increasing or diminishing the speed of rotation of the bevelled gear 25 thereby allowing the valves to be rotated for operating at a high or a low speed, said shifting of the-shaft 27 being controlled by a lever 31. Valve 19 is provided with a spring 32, similar to the spring 18 for mainlaining the same tightly seated at'all times.

From the above it will be seen that an opposed cylinder engine is provided which is simple in construction, one wherein the same combustion chamber is used for opp0- site pistons, cylinder heads are eliminated, and one wherein a speed of operation may be controlled. It will also be seen that the and at the outer ends of the cylinders, connecting rod connections between the crank shafts and the pistons, a rotary intake valve above the cylinders centrally thereof at a right angle to the cylinders and in a plane at one side thereof and having ports of communication therewith, an exhaust valve below the cylinders at a right angle thereto and in a plane at the other side thereof from the intake valve and having ports of communication therewith and means for simultaneously rotating said intake and exhaust valves, said last named means being controlled at various speeds from either crank shaft and by a single lever between the crank shafts.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4037572 *Jul 28, 1976Jul 26, 1977Franz Dennis LavernePaired piston engine with rotary valves
US7765803 *Feb 27, 2007Aug 3, 2010Inje University Industy-Academic Cooperation FoundationCrankless reciprocating steam engine
U.S. Classification123/51.0AA, 123/51.00A, 123/190.5
International ClassificationF01L7/00, F01L7/08
Cooperative ClassificationF01L7/08
European ClassificationF01L7/08