US360914A - Governor - Google Patents

Description

(No Model.) 2 Shets-Sheet 1.

A. RANDOLPH.

GOVERNOR. No. 360,914. Patented Apr. 12', 1887.

Witnesses? I Inventor Attorney- (No Model.) 2 Sheetis$heet' 2.

L A. RANDOLPH.

GOVERNOR.

No. 360,914. PatentedApr. 12, 1887. w

Fig. 6.

Witnesses: M (R, 1 Inventor Attorney UNITED STATES,

PATENT OFFICE.

ALFRED RANDOLPH, OF WILLIAMSPOR'I, PENNSYLVANIA.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 360,914, dated April 12, 1887.

A pplication filed December 3, 1886. Serial No. 22 ,563.

To all whom it may concern:

3e it known that I, ALFRED RANDOLPH, of lYilliamsport, Lycoming county, Pennsylvanla, have invented certain new and useful Improvements in Governors, of which the following is a specification.

This invention pertains to steamengine governors of that class known as shaft-governors -that is, the class in which the governor is attached to and revolves withthe engine-shaft and serves in adjusting the position of the eccentric.

rangement when the governor is intended to run in the direction indicated by the arrows in Figs; 1 and 5; Fig. 6, a diagram similar to Fig. 5, but illustrating the arrangement of parts when the governor is to run in the opposite direction; Fig. 7, a face view of the pivoted eccentric, illustrating a construction in which the counterbalance-weight and eccentric are located upon the same side of the disk of the case which carries the governor parts, the eccentric, its double-ended lever, and the counter-weight beingin this case formedin one piece; and Figs. 8 and 9, respectively a face view and plan of the eccentric and its doubleended lever when constructed to have these two elements arranged upon opposite sides of the disk or web of the case which carries the governor parts.

(No model.)

outward upon opposite sides of the pivot upon which the eccentric oscillates; D, weighted arms pivoted to the case upon opposite sides of its axis; E, links connecting these arms with the ends of the double-ended lever; F, a counterbalancing weighted lever secured to the eccentric, such weight being oppositely disposed with reference to the mass of the cocentric; Gr, a tensional spring having one end attached to the lever O and its other end attached to an eye near the periphery of the governor-case; H, a nut-bar engaging the end coils of the spring, the nut-bar being disposed diametrically across the coils of the spring and pierced transversely in order that the coils may be inserted screw-wise thereinto, as clearly shown in Figs. 3 and 4; J, g a pin inserted through the nut-bar tangentially to one of these piercings and engaging a notch in the coil of the spring, as seen in Fig. 4; K, an adjusting-screw engaging an eye at the periphery of the governor-case andscrewing into the nut-bar; and L, a line cutting the center of the shaft, the pivot of oscillation of the eccentric, and the pivots of oscillation of the arms D.

In Figs. 1 and 7 I show the double-ended lever C as being formed with or attached directly to the eccentric, the integral structure being provided with a pivotstud. The stud may be secured to the governorcase and the structure oscillated upon it; or the stud may be secured in the eccentric structure rigidly and find its bearing of oscillation in the governor-case. WVhere the doubleended lever and the eccentric are thus formed together, it is obvious that the weighted arms, the links, and the spring may be located upon the same side of the case-disk as the eccentric.

In Fig. 9 I show how the parts may be ar ranged in case it is desired to have the eccentric upon one side of the disk of the governor case while the weighted arms, doubleended lever, links, and spring are located upon the other side of the disk. In such case the double-ended lever and the eccentric are rigidly secured to the opposite ends of the pivot-stud journaled in the disk of the governor-case.

The counterbalance-weight F may be disposed upon either side of the case'disk, as desired.

In Figs. 1 and 2 the counterbalance-weight and eccentric are shown upon opposite sides of the disk, being rigidly attached to opposite ends of the pivot-stud journaled in the case-disk,while in Fig. 7 I illustrate the counterbalance-weight as formed integrally with the double-ended lever and eccentric, so as to be located upon the same side of the case-disk with them; and in Figs. 8 and 9 both these positions of the counterbalance weight are shown in dotted line. weight prevents the improper motion of the eccentric naturally due to the action of gravity upon its own mass.

The nut-bar H serves as a means for engaging the adjusting-screw with the spring. The links E take hold of the arms D and lever O by pivots disposed in each case an equal distance from the centers of oscillation of the arms and eccentrics. The length of the links from center to center is the same as the distance from the center of oscillation of the cocentric to the center of oscillation of the respective arms D. The arrangement specified produces a parallel motion and equilibriatcs the action of the weighted arms upon the eccentric, and at the same time permits the governor being readily adjusted to revolve in either direction, as will be readily understood by inspecting the diagrams of Figs. 5 and 6, in which it will be seen that the change is effected by reversing the direction of projection of the arms D, each arm carrying its own link with it and moving the spring to the opposite end of the double lever. The spring serves in the usual manner to furnish the centripetal force; but the spring, applying its centripetal force or resistance directly to the cccentric-lever, causes the centrifugal mechanism to act upon an eccentric whose resistance is steady and firm and free from the jerky action inherent in eccentrics whose centripetal force i acts through linkages, and the weighted arms curving outward under the action of eentri fugal force serve to move the eccentric across the The counterbalance shaft and lessen the throw. I11 case it is desired that the parts beadapted for adjustment to either direction of motion in the manner above pointed out, the parts must be so constructed that the distances from the center of the eccentric to the center of the end pivots of the double-ended lever C are equal-in otherwords, that a line passing through the pivots of the lever O and a line passing through its central pivot and the center of the eccentric shall be at right angles to each other, as seen in Fig. 5. This proportioning and arrangement may be ignored in case the governor is not to be adapted for either direct-ion of motion.

I claim as my invention- 1. In a shaft governor, a governor case adapted to be secured to an engine-shaft, an eccentriepivoted thereto and adapted for oscillation across the shaft, a pair of weighted arms pivoted to the case, the pivots of oscillation of these arms and the pivot of oscillation of the eccentric and the center of the shaft lying in the same plane, a double-ended lever arranged to oscillate with the eccentric, links connecting the weighted arms with said lever, and a spring engaging said lever and the case and adapted to oppose the action of the weights, combined and arranged to operate substantiall y as set forth.

2. In ashaft-governor, the combination, with a governor-case, an eccentric mounted for adjustment therein, centrifugal me'chanism for adjusting the eccentric in one direction, and a coil-spring for resisting the action of the centrifugal mechanism, ofa diametrieally-disposed nut-bar engaging the end coils of the spring by piercings, and a pin in one side of the nutbar engaging a notch in the coil of the spring disposed within one of said piercings, substantially as and for the purpose set forth.

ALFRED RANDOLPH.

Witnesses:

Janus M. BEUGLER, J. S. CHRIsTLrnB.

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