US388290A - Eenst koeting - Google Patents

Description

(No Model.)

E. KORTING.

VALVE GEAR. No. 888,290. Patented Aug. 21, 1888.

fiomst Kovtvh. 7 W ,1 (M W Fries,

nnnsr Kon'rING, OF HANOVER, PRUSSIA, GERMANY.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 388,290, dated Au." e: 21,1888.

Application filed January 3, 1888. Serial No. 259,585.

To all whom it may concern:

Be it known that I, Ennsr KORTING, a sub ject of the King of Prussia, residing at Hanover, Kingdom of Prussia, Germany, have invented new and useful Improvements in Valve- Gears, whereof the following is a specification.

My invention relates to the valvegear of powerengines that operate by means of an agent-such as steam, gas mixture, or the like-admitted into and allowed to escape from the engine through the medium of liftingvalves. More especially it regards the operation and time of closing the exhaust at variable points and the mechanism connected with the valve upon whose point of closing depends the power developed by the engine. Heretofore the speed and power of engines have been regulated by the admissionvalve of steam or gas to the power-cylinder.

My invention consists, first, in the combi nation, with the valve, of two reciprocating parts actuated by the engine and moving independently of each other, a pawl, and a spring or a weight, one of the reciprocating parts operating to open the valve, and the pawl keeping it open until it is released by the other reciprocating part, whereupon the spring or weight closes it.

The invention consists, secondly, in the insertion between the said pawl and the second reciprocating part, of a movable piece connected to a governor and adapted to vary the distance which the second reciprocating part has to travel until it causes the valve to be released, the closing of the valve being thus brought about earlier or later, according to the speed of the engine and amount of power required at the time.

Figure l of the annexed sheet of drawings represents a valvegear involving my invenvention. Fig. 2 shows modifications of parts thereof.

The aforesaid reciprocating parts consist in this case in the arm (2 of the lever (Z c and in the rod 7;.

a is the valve, 1; the stem thereof, and g the pawl.

The arm e of the lever (Z 6 extends into the path of a tappet, r, keyed on the shaftf, and which during its rotation operates to depress the arm 6, and thereby to raise the arm (Z, and

(No model.)

the latter is connected by a pin, (2, to the valvestem 1), so that on rising it will lift the valve. For closing the valve a spring, 0, is attached with its respective ends to the arm (I and the box of the valve or any other stationary part. The spring may, however, also be fixed with its upper end to the stem I), (see Fig. 2,) and in this case the arm d may be arranged to catch under the pin (1, so that it will only act from below on the same. The stem 1) has at the top a lateral projection, I), forming a shoulder adapted to engage, when being in its highest position, with the projection or shoulder h of the pawl g, which is drawn by a spring, a, or a weight toward the stem b. \Vhen the valve is closed, the projection It bears against the projection b,- but as soon as the valve has been raised by the action of the tappet r on the lever d e, the pawl, by means of its projection or shoulder 71, catches the valve stem and keeps the valve open.

The rod k, constituting the second reciprocating part, which serves to release the valve, is actuated by the eccentric s, keyed on the same shaft which carries the tappet 1', the said rod being arranged to move transversely to and in the plane of the pawl 9. Provided the rod be made long enough to strike against the pawl and to be adapted to push it backward, it will at a certain point of its course disengage the projections h and b from each other, whereupon the valve is closed by the spring 0.

If the time of closing of the valve is to be made dependent upon the speed of the engine in view of reducing the power developed when the speed is too great and of increasing it when the latter is below the normal, a movable controlling-piece suitably guided is inserted between the end of the red It and the pawl g and connected to the governor designed to regulate the speed. The rod is is arranged to act on the pawl through the medium of the controlling-piece, and the latter is made of such form that when the balls of the governor fly outward there will be a decrease in the distance which the rod is has to travel until it acts on the pawl. In the arrangement shown by Fig. 1 the said controlling-piece consists in an eccentric sector, '5, pivoted to the top of the pawl and connected to the sliding boss of the governor m by the rod 1) and the lever 0, the

smaller radius of the sector being at the bottom. In the modified arrangement represented by Fig, 2 the controlling-piece is constituted by a wedge, i, being in sliding connection with the pawl and related to the governor in like manner as the cam. Thus when the speed is too great the sector or the wedge will be depressed, and the rod 70 will operate at an earlier point of its stroke to release the valve, so that it may close.

I claim as my invention 1. A valve-gear for power engines, comprising the valve a, having the stem 1), with shoulder 1), the pawl g, with shoulder h, the springs c and n, or equivalent weights, and the two reciprocating parts 01 and 7c, actuated by the engine, all combined and operating together substantially as and for the purpose set forth.

ERNST KORTING.

Witnesses:

G. Liicrtren, JoHs. KRAOKE.

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