US424099A

US424099A - delamaee-deboutteyille

Info

Publication number: US424099A
Authority: US
Publication date: 1890-03-25
Anticipated expiration: 1907-03-25

Description

No Model.) 2 ShetS Sheet 1.

P. DBLAMARE-DEBOUTTEVILLE & LP. 0,

MALANDIN. GOVERNOR FOR GAS ENGINES AND OTHER LIKE MOTORS. N0.'424,099'. Patented Mar. 5, 1890.

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E. F. DELAMA RE-DEBOU TTEVILLE. &; L. P. O.

MALANDIN. GOVERNOR FOR GAS ENGINES AND OTHER LIKE MOTORS. No. 424,099.

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UNITED STATES PATENT OFFICE.

EDOUARD FRANQOIS DELAMARE-DEBOUTTEVILLE AND LEON PAUL CHARLES MALANDIN, OF FONTAINE-LE-BOURG, FRANCE.

GOVERNOR FOR GAS-ENGINES AND OTHER LIKE MOTORS.

SPECIFICATION forming part of Letters Patent No. 424,099, dated March 25, 1890.

Application filed October 28, 1889. Serial No. 327,963- (No model.) Patented in France June 10, 1887, No. 184,138; in Italy June 22, 1887, No. 21,899; in England June 27,1887,No. 9,249; in'Spain July 14,1887, No.11,164, and in Belgium August To all whom, it may concern.-

"Be it known that we, EDOUARD FRANQOIS DELAMARE-DEBOUTTEVILLE and Leon PAUL CHARLES MALANDIN, mechanicians, residing atFontaine-le-Bourg, (Seine-Infrieure,) in the Republic of France, have invented Improvements in Governors for Gas-Engines and other Like Motors, (for which we have obtained Letters Patent in France, No. 184,138, June 10, 1887; in Italy, No. 21,899, June 22, 1887; in Spain, No. 11,164, July 14, 1887; in Great Britain No. 9,249, June 27, 1887; and in Belgium, No. 83,003, August 24, 1888,) of which the following is a specification.

Our invention relates to a governor of im proved construction, which is more particularly designed for gas-engines, but is capable of being applied to other motors by suitably modifying the construction. This governor is based in the first place on the laws governing the fall of bodies in space, and in the second place on the duration of the oscillations of a pendulum, which duration diminishes as the rod is shortened and the weight increased.

In considering the construction of this governor it must be remembered that governors for gas and like engines have two distinct functions to perform-namely, to admit the motive fluid or shutit off altogether by simply opening and closing a valve. Vhen the governor admits gas to a gas-engine, for example, by allowing the gas-valve to open, an explosive mixture is produced. This mixture is then exploded, and an impulse is thereby imparted to the piston. In case the speed of the motor exceeds the normal rate the governor must simply cause the gas-valve to remain closed in order to diminish the speed.

In order :that our said invention may be 4ofully understood, we shall now proceed more particularly to describe the same, and for that purpose shall refer to the several figures on the accompanying sheet of drawings, the same letters of reference indicating corresponding parts in all the figures.

Figure 1 of the accompanying drawings is an elevation of a governor constructed according to our invention applied to a gas-engine with merely so much of the slide and gear as is necessary to explain the action of the governor. Fig. 2 is a plan of the same. Figs. 8 and 4 show two different positions occupied by the governor when in action, as hereinafter explained. Fig. 5 is a diagram employed in regulating the position of the knife-edges at the moment of their engagement. Figs. 1 and 2 show the position of the parts when the gas-valve is open.

This governor is constructed with a differential pendulum a b, composed of a rigid rod r, with two weights CL and b, one above and one below the center of oscillation or trunnions c. The lower weight b, which may be of lenticular form, constitutes the acting weight, while the upper weight a is a compensating or regulating weight, which enables the action of the governor to be controlled, as hereinafter explained. An immovable arm or support (I, fixed onto the explosion-chamber of the engine, for example, isprovided with bearings for the pins or trunnions c, on which the pendulum is suspended.

The gas-valve 7" is opened by means of a lever g f, pivoted on a stud m, carried by an arm m, connected to the slide-rod m This lever g f is provided at one extremity with a tooth f and at the other extremity with a knife-edge g. The tooth f engages with a tooth or notch c, Fig. 1, in the lower arm of the pendulum, and when so engaged the So knife-edge 9 acts upon the gas-valve.

The slide 7c, Fig. 2, is operated by a cam or eccentric in the usual way, and partakes of a reciprocating motion, which is communicated to the arm m, carrying the lever g f, and the gas-valve is operated by the aforesaid knife-edge g, acting on a knife-edge h, attached to a slide connected to the valvestem This slide acts as a guide for the knife-edge h, and is provided with slots en- 0 gaging with two fixed keys or studs "5 2', which keep the knife-edge h in a horizontal position. The gas-valve j is opened when this knife-edge h is pushed by the corresponding reciprocating knife-edge g on the lever g f, as seen in Fig. 1, and a spring j (drawn in dotted lines in Fig. 1) tends to maintain the gas-valve normally in the closed position.

The action of the governor is as follows: W hen a charge of gas is admitted to the cylinder, the parts being in the position indicated in Figs. 1 and 2, the trunnions c, on which the pendulum a b is suspended, are lifted oif their bearings and the weight of the pendulum rests on the lever-arm f, thus retaining the lever-arm g in the horizontal position. The slide now moves to the right, and the arm m and lever-arms g f partaking of the same motion, the pendulum is moved to the position indicated in Fig. This has the effect of causing the centers 0 to rest on the support (1 and causing the lever-arm f to leave the notch or tooth e. At the same time the arm g of the lever beingheavier than the arm f, the lever g f assumes the inclined position shown in Figs. 3 and 4. Then the slide in returning is moved to the left at its normal rate of speed and the parts return to the position indicated in Fig. 1, the knife edge or arm g acts upon the corresponding knife-edge h, connected to the gas-valve j, and opening the valve admits a charge of gas. To obtain this result, it is necessary for the arm f to re-engage with the tooth e, in order that the weight of the pendulum may retain the knife-edge 011 the arm g in the horizontal position, so as to enable it to engage with thecorrespondingknife-edge71 ,connected to the valve-stem. The lever g f, being connected to the slide-valve rod, moves to the left with a degree of rapidity corresponding to the rate at which the engine is running. By suitably adjusting the weights on the pendulum the latter is caused to oscillate at a fixed rate when left to itself, and when the slide and lever move to the left at this or any slower rate the pendulum follows up the lever and the end fof the latter re-engages with the tooth or notch e on the pendulum. On the other hand, when the slide and lever move at a rate more rapid than that for which the pendulum is adjusted, the latter is left hehind, and the end f of the lever, failing to reengage with the tooth or notch e on the pen.- dulum, remains in the elevated position. The knife-edge g on the other end, remaining depressed, misses the corresponding knife-edge 72, connected to the gas-valve, and the latter consequently remains closed. This condition of the parts is represented in Fig. 4.. The position of the tooth or notch on the pendulum must be such as to insure the return of the lever g f to the proper position for acting on the gas-valve when the engine is running at or below the normal rate. This position is best ascertained by means of a diagram, Fig. 5, illustrating the angles occupied by the crank or eccentric operating the slide at different parts of the stroke. This diagram, in

. connection with Fig. 3, enables the point in the stroke at or before which the arm f of the lever g f must re-engage with the tooth e, in

order to open the gas-valve, to be readily ascertained.

In the diagram, Fig. 5, admission takes place from X to Y, and the tooth on the pendulum must come in contact with the arm f of the lever f y when the pin of the crank working the slide arrives at the point an of its stroke, the direction of rotation being on m n. In Fig. 3, s is the line in which the corner or edge 3 of the lever-arm f is situated when the lever has returned to the horizontal position.

3 8 represents the line in which the edge 3 is situated when the crank reaches the point in, Fig. 5. The point e is consequently the point at which the contact must take place in order that as the parts continue their horizontal motion the lever-arm g may be returned to the horizontal position in time to enable it to act upon the knife-edge h and open the gas-valve. The are 3'' s (the center of which is the pivoting-point c of the rod '1' and the radius equal to the distance from 0 to the point e) crosses the rod 7' at the point where the tooth 6 must be placed to engage with the edge .5" at the point e.

This governor enables the speed of the engine to be regulated with great precision, being free from the disadvantages attending the employment of governors acting by a shock or jerk, and the normal rake can be changed with great facility by simply adjusting one or both of the weights on the pendulum, the upper weight being preferably supported on a nut 11, working on a screw formed on the pendulum-rod 'r for this purpose. By moving the weights farther apart-shifting the weight a, away from the weight b, for exam ple the pendulum is caused to swing more slowly as the weight a to a certain extent counterbalances the weight b. This causes the lower end of the pendulum-rod to take more time in descending, and the tooth e 011 the pendulum fails more frequently to engage with the knife-edge or lever-arm f, so that the speed of the engine is proportionately reduced. The opposite effect is produced by shifting the weight a nearer to the weight b.

This improved governor, although more particularly designed for controlling the speed of gas-engines, may evidently be employed for regulating the action of otherlike motors by suitably modifying some of the details of construction.

Having now particularly described and ascertained the nature of our said invention,

and in what manner the same is to be perended lever carried by the slide-valve of the engine, one end of the lever engaging with the notch in the pendulum, the other end with a knife-edge connected to the supply-valve, substantially as set forth.

3. A governor for gas or like motors, comprising a differential pendulum. provided with adjustable weights and a notch, a doubleended lever carried by the slide-valve of the engine, each end of the lever being provided with a knife-edge, one to engage in the notch of the pendulum to raise the other end, and a slide connected to the supply-valve stem, provided with a knife-edge adapted to be engaged by one end of the lever, substantially I 5 EDOUARD FRANQOIS DELAMARE-DEBOUTTEVILLE. LEON PAUL CHARLES MALANDIN.

Witnesses:

CHARLES SCHIFFMACHER, PIERRE LEONCE CORNIELLIER.