US683152A - Explosive-gas engine. - Google Patents

Description

No. 6834525" Patented Sept. 24, l90l.

- v V. ST. JOHN EXPLOSIVE GAS ENGINE. (Appfication filed May 8, 1899.) (No Modal.) I 2 Sheets-Sheet 7n: Noam: PETER 0a.. PHOTO-LITHO WLSHINOTbN, o. a,

Patented Sept. 24, 190i. V. vST. JOHN.

EXPLOSIVE GAS ENGINE.

(Application filed May 8, 1899.)

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(No Model.)

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UNITED STATES PATENT OFFICELF VICTOR ST. JOHN, OF FAIRMONT, MINNESOTA.

EXPLOSlVE-GAS ENGINE.

SPECIFICATION forming part of Letters Patent No. 683,152, dated September 24, 1901.

Application filed May 8, 1899. Serial No. 716,073. (No model.)

To ctZZ whom it Hwy concern:

Be it known that l, VICTOR ST. JOHN, of Fairmont, Martin county, Min nesota,have invented certain Improvements in Explosive- Gas Engines, of which the followingis a specification. I

My invention relates to improvements in the construction of explosive-gas engines; and it consists in the features of construction and combination hereinafter described and claimed.

In the accompanying drawings, forming part of this specification, Figure 1 is a vertical section of a gas-engine embodying my improvements. Fig. 2 is a view of part of the operating mechanism. Fig. 3 is a cross-section on lineman of Fig 1. Fig. 4 is a section on line 1 y of Fig. 1 with the fly-wheel removed.

In the drawings, A represents the cylinder of the gas-engine, and 2 the crank-shaft, upon which is mounted the fly-wheel 3. The crank portion 4 of the shaft, as shown in Fig. 1, is entirely inclosed within the base of the engine. The base of the engine is provided with an air-inlet valve 5, held to its seat by suitable springs 6. Arranged in the cylinder 7 of the engine above the crank is the piston 13. For the purposes of my invention 1 form the piston with a vertical passage 8, the upper end 9 of whichis enlarged and communicates with the space above by an opening 10, normally closed bya gravity-valve 11. Said passage 8 is connected by means of a pipe 12 with the gasolene-reservoir 13, arranged on the outside of the engine. The gas-inlet pipe 12 is closed by a gravity-valve 14, supported on the rods 15 and which are actuated to open the valve in the manner hereinafter described.

Arranged in the top of the engine is the exhaust-valve 16, supported by the lever 17, having fulcrum support 18 upon the top of the engine, a spring 19 being provided which tends to hold the valve closed. The lever17 is actuated to close and open the valve by the following-described parts: Mounted upon the crank-shaft 2 is the gear 20, which inn; meshes with a gear 21, journaled above the i Upon the has journal support 26 and the other end spring connection 27 with the framework of the engine, the point of connection not being shown. It will be evident that as the gear 21 is rotated in the operation of the engine and the projecting portion 28 of the cam is brought into contact with the roller 23 the rod 24 will be raised, opening the exhaustvalve, and as the projecting portion of the cam is carried past the roller the rod 21 will be allowed to drop, permitting the spring 19 to carry the exhaust-valve to closed position.

The'speed of the engine is governed in the following'manner: A weight 29 is arranged in an opening 30 in the gear 21 and is supported upon a lever 31, the other end of which lever bears upon the face of the gear. Said lever is loosely mounted upon the rod 32, which passes through the hollow gear-supporting shaft and is held inward by means of a coil spring 33. Extending transversely through the hollowshaftisaspring34,secured at its lower end to the frame of the engine and having its upper end 35 beveled to engage with the grooved contact 36, which is carried by the lower end of the rod 24, thus forming a knife-contact. The spring 34 is connected with the rod 32, so as to be actuated in the movement thereof. The spring 31 is normally held away from the contact 36 by means of the spring 33. As in the operation of the engine the speed of the gear 21 increases, the governor-weight 29 is thrown outward by centrifugalaction, carrying with it the rod 32 and carrying the knife-contact 35 into engagement with the contact 36. In Fig. 1 the parts are shown in this position. If the spring-contact 35 is carried under the projecting edge of the contact 36 when the exhaust-valve is opened by means of the cam 22 raising the rod 24, the exhaust-valve will be then held open until the projecting portion of the cam again comes in contact with the roller, for the reason that the roller-drops after passing the projecting portion of the cam and allows the contacts 35 and to interlock. As each revolution of the cam raises the roller 23 sufliciently to disengage the knife-contacts, the

spring-contact 34 will be drawn back to disengaged position as soon as the speed falls enough. This, as will be seen, is the ordinary hit-or-miss principle of governing gasengines; The valve 14, closing the gasolenepipe, is actuated to allow an inflow of gas by means of the collar 37, mounted upon the rod 24. A suitable spring (not shown) may be used to normally hold said valve in closed position. Upon the outside of the engine-cyl inder are formed series of projections 38, the purpose of which is to so increase the radiating surface as to render unnecessary the use of an ordinary water-jacket. That may be done in other equivalent ways, such as projecting corrugations, strips, 850. A plate 39 is fitted loosely under the valve 14, forming a section to retard the inrushing air and more thoroughly vaporize the gasolene.

The cycle of the engine is as follows: On the upstroke of the piston air is drawn in at the valve 5. On the next downstroke the air that has been drawn in will be forced through the passage 8 and through the valve-opening 10 into the cylinder beyond the piston. As the air rushes past the the end of the gasolenepipe it will draw the gasolene with it through the valve. On the next upstroke of the piston the charge is compressed and exploded in the usual manner. The next downstroke of the piston will therefore be the working stroke. As the piston reaches the lower end of the working stroke the air below the piston, which is compressed, raises the valve 11 in the piston and passes into the cylinder, cleaning out theburned gases and cooling the cylinder.

It will be noticed that the cam is so shaped that the roller 23 will be given a downward movement immediately after the upward movement which opens the exhaust,this downward movement opening the gasoleue-inlet valve by. reason of the engagement of the collar 37 with the lever-rod 15.

I claim'- 1. A gas-engine of the class described, comprising the cylinder, the piston working in said cylinder, its actuating-crank, the passage in said piston, the pipe connecting said passage with the source of gas-supply, and the valve arranged in said. piston between said passage and the interior of the cylinder, whereby upon the working stroke of said piston the rushing of the air through said pas sage and valve will carry the gas into -the cylinder.

2. A gas-engine of the class described, comprising the cylinder, the piston working therein, its actuating-crank, the passage through said piston, the valve normally closing said passage, the gas-inlet pipe leading from said passage to a source of supply, the valve closing said pipe, the exhaust-valve for the cylinder, the gear driven from the main crankshaft, and the cam carried by said gear and operatively connected with the exhaust-valve and inlet-pipe valve, and so constructed as to open the exhaust-valve, and to open the valve closing the inlet-pipe when the exhaustvalve is carried to closed position.

In testimony whereof I affix my signature in presence of two Witnesses.

VICTOR ST. JOHN.

Witnesses:

O. N. PETERSEN, MAUD FELHAN.

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