US796730A - Gas-engine governor. - Google Patents

Description

- No. 796,730. f I PATENTED AUG. 8, 1905.

T. B. JEFFERY.

GAS ENGINE GOVERNOR.

APPLICATION FILED DEC. 14. 1903. RENEWED APR. 8,1905.

UNITED STATES PATENT OFFICE.

THOMAS B. JEFFERY, OF KENOSHA, WISCONSIN.

GAS-ENGINE GOVERNOR.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed December 14, 1903. Renewed April 3, 1905- Serial No. 253,664.

' forming a part thereof.

The purpose of this invention is to provide an improved governor for electric igniter to govern the time of sparking 1n an explosivemotor conformably to the speed of the mo-.

tor for the particular purpose of preventing the motor from acquiring excessive speed by the continued advance of the time of sparking as the speed increases and to cause such increase of speed after a predetermined point to retard or interrupt the spark.

It consists in the features of construction set out in the claims. v

- In the drawings, Figure 1 is a plan view of a governor embodying my invention, the parts being shown at position of rest. Fig. 2 is a view similar to Fig. 1, showing the parts in full line in position occupied at the highest speed at which the governor is adjusted and in dotted line at the position to which they would be moved by an increase of speed beyond such maximum.

In the construction illustrated in the figures centrifugal action is employed to interrupt the circuit when the maximum desired speed is passed. In this construction the disk 2, centrifugal elements 3 3, rocking element 4:, and links 4 4* for connecting the centrifugal elements to said rocking element are the same as in the other figures; but the contact-piececarrying element is a lever 30, carried by the rocking element 4 and pivoted thereto at the pivot at which said element is connected by the link 1 to the centrifugal element 3. This 7 lever is forked to stride the shaft and by the inwardly-extending projections 30 and 30 bears at opposite sides thereof upon the periphery of a collar 31, fast on the shaft. At one side of the shaft the lever has a weight 32, which tends by centrifugal action to hold the projection 30 at the opposite side against the periphery of the collar. The entire organization, however, comprising the rocking element 4: and the lever 30, with its fork-arm, projections, and weight, rocks together about the shaft as the centrifugal elements 3, departing from the center, actuate said element 4.. The collar 31 is cut away at a point 33 a little in advance of the position at which the projection 30 bears on the collar when the parts are at rest, and the fork-arm of the lever 30, having said projection 30, is in position for making contact with the fixed contact element 7 as the shaft revolves with the projection 30 bearing upon the circular por-.

tion ofthe periphery of the collar 31; but when in the rocking movement caused by the centrifugal elements 3 the projection 30,

reaches the cut-away portion 33. of the collar 31 the lever, being relieved from the restraint,

yields to the centrifugal tendency of the; weight 32 and swings about its pivotal sup-: port on the rocking element 4 to the extent: of the depression at 33 in the collar, takes the contact-point 6 of the arm having the projection 3O out of the path for contact with the contact-piece 7, and prevents the sparking so long as the speed is maintained at the point; at which the retreating portion of the periph-.

cry of the collar is in position to receive the projection 30". the springs, returning the centrifugal elements 3 3 to the center and rocking back the element 4: to original position, will carry the projection 3O out of the recess 33 of the collar onto the circular portionof the periphery of said collar, restoring the contact-piece 6 to the proper path for encountering the contact-piece 7.

.In order to counterbalance the weight of the extension 32 so that the entire structure will revolve steadily, an extension-arm 34 may be formed projecting from the rocking element 4 at the opposite side of the axis from that on which the weight 32 is located. Such extension 34, rocking with the other elements carried by the part 4, will always maintain a position opposite the weight 32, and so counterbalance the same accurately, with the slight exception that when the finger 3O falls into the recess 33 the weight 32 will move out ward from the center a very short distance, and the weight 35 cannot make any corresponding movement. This, however, will constitute so slight a disturbance of the equilibrium that it may be disregarded.

I claim 1. A gas engine governor comprising a shaft rotated in uniform time relation to the complete cycle of-the engines action; a cen trit'ugal element carried by the shaft; an element rocking on the shaft and connected to such centrifugal element for such rocking movement; a contact-piece-carrying element When the speed diminishes pivotally connected with such rocking element ecccntrically with respect to the shaft extending therepast and weighted to locate its center of gravity at the opposite side of the shaft from that at which it extends past the same; an element on the shaft against which said contact-piece-carrying element is held by its centrifugal tendency, having in its outline a retreating or-recessed portion reached by the bearing-point of the contactpiece-carrying element tl'icreagainst in the movement of the same with the rocking element to permit the withdrawal of the contactpiece from the path for contact.

2. A gas-engine governor comprising a shaft rotated in uniform time relation to the complete cycle of the engines action; a centrifugal element carried by the shaft; an element rocking on the shaft and connected to such centrifugal element for such rocking movement; a lever pivotally connected with said rocking element eccentrically with respect to the shaft, and extending on opposite sides of the latter, and weighted to locate its center of gravity at one side of the shaft for pressing it, by centrifugal tendency, against permitting the lever to yield toward the shaft to take the contact-piece out of its path for contact.

3. A gas-engine governor comprising a shaft rotated in uniform time relation to the complete cycle of the engines action; a centrifugal element carried by the shaft; an element rocking on the shaft and connected to such centrifugal element for such rocking movement; a lever pivotally connected with said'rocking element eccentrically with re spect to the shaft, and having two arms extending at opposite sides of the shaft, one of said arms being weighted to locate the center of gravity at that side, the other arm having an outward projection constituting a contactpiece, and an inward projection for stopping the arm in the direction of the shaft; an element on the shaft against which it is thus stopped, said element being reduced at the portion of its periphery reached by the bearing projection after a limited rocking movement, to permit said projection to approach the shaft for taking the contact-piece out of its path for contact.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chicago, Illinois, this 3d day of December, 1903.

THOS. B. JEFFERY.

In presence of CHAS. S. BURToN, FREDK. G. FISCHER.

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