US301720A - Steajvj-engine governor - Google Patents

Description

(Nomade-a1.) 2 sheets-sheen 1.

A. L. DB,

STEAM ENGN-E GOVERNOR. No. 801,720. Patented July 8, 1884.

(No Model.) .2 sheets-sheet 2.

A. L. IDB. y

STEAM ENGINE GOVERNOR.

No. 301,720. Patented July 8, 1884.

Tio

N. PzfiRs. mlowwgnahvzr. wan

NrrEn S'rAfrEsl ALBERT L. IDE, or sPErNGErELniLLiNois.

STEAM-ENGINE GOVERNOR.

SPECIPCATION forming part Of Letters Ptenl'. NO. 301,720, dated July 8, 1884-.

Application nieu ,nur 11, iss. (No model.)

Zo #El whom, t may concern,.-

Be it known that I, ALBERT L. IDE, of Springfield, in the county of Sangamon and State of Illinois, have invented certain new and useful Improvements in Steaii'i-Engiiie Governors; and `I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to theaccompanying` drawings, and` to the letters of reference marked thereon, which form a part of this specification.

This invent-ion relates to that class of stean1- engine governors known as fly-Wheel governors, and has for its primary obj ect to provide means for holding the eccentric steadily in its proper poised position, in opposition to the tendency of certain extraneous forces which are calculated to disturbthe 1novements of the valve, as sought to be determined by the `balanced forces of Weights and springs when the engine is in motion.

To this end the invention consists in the combination of a dash-pot with the governor and pulley, said dash-pot connected with a fixed and a movable part, or with two relatively or unequally movable parts-as, for example, With the extremity of a Weight-lever and the pulley/"hub,

In this class of governors the position of the eccentric is variably determined by the oppos- `ing and self-balancing forces exerted by the centripetallyncting spring or springs and the centrifugally-acting weight or weights connected with said springs, the intention being to hold the eccentric permanently in a certain poised position for a given speed ofthe wheel to which the governor. is applied, and to vary the position oi' the eccentric exactly as the speed of said wheel is varied. There are, however, certain temporarily-acting causes of disturbance calculated to change the position of the eccentric independently ot' the speed of the wheel. The principal of these disturbing causes is the inertia of the rcciprocati n g parts, including the eccentric and the parts actuated thereby; anda secondary cause is the gravity ofthe eccentric when not couuterbalanced by some special device for the purpose. At a regular and very high speed of the governor wheel or pulley these disturbing` 'forces operate but slightly, owing to the momentum of ,theweights which serve to prevent their deilection from a regular course; but at lower speeds than that at which the apparatus is adjusted torun, and particularly inaccelerating or ret-arding the engine, as in start-ing up or slowing down, these incidental disturbing forces interfere materially With the valve action and give an objectionable irregularity to the movements of the Weights. au engine used for running a dynamo for electric-lighting purposes, and subject to sudden and wide ch anges in requisitions of power and speed, the effects of the disturbances referred to manifest themselves also in the qualit-y or intensity of the lights. A dash-pot constructed and attached to the apparatus in such manner as to prevent sudden movements of the weight-levers or of thei eccentric is found in practice to Wholly overcome the defects indicated and to give a desirable steadiness and regularity to the movements of the 'movable' Yparts of the governor, as well as accuracy and reliability to the cutoff action of the Valve.

The improvement will be understood from the following description and accompanying drawings,

y In said drawings, Figure lis a side elevation of a pulley provided with a governor having my improvement,the dash-pot being shown in axial section. Fig. 2 is a section of the pulley in the indirect line a: .fr of Fig. 1. Fig. 3 is a section of the pulley and other parts in the indirect line 1/ y of Fig. l. Fig. ai is a fragmentary section of the pulley 'and other parts in the line z c ol" Fig. l.

In the case of 6o A is a pulley or wheel having arms c c, and

secured by its central hub to the shaft B.

C is an eccentric having the slot or opening c, by which itniovably embraces the shaft B; and l) is an arm attached to the eccentric and supporting it from the body of the pulley by a pivot-pin at d.

S is the eccentric-strap, applied in any approved nianner to the' eccentric and joined vwith the valve-rod R.

E E are two upright levers, fulcruined at c e to opposite points on the pulley A, and E E are the Weights applied adjustably as to their position to said levers. rlhe Weightlevers project in opposite directions from their pivotal points, so that the weights E' lOO thereon, when properly located, stand at diametrically opposite points of the pulley and counterbalance each other. One ofthe levers E is extended beyond its fulcrum e by the short arm e. To the extremity of this arm c', and to the opposite lever E, at a point inward an equal distance from the fulcrum, are pivoted the outer ends of connecting-rods G G, whose inner ends are pivotally joined to the eccentric C, preferably by a common pin, g, to a lug, G, located on the eccentric at a point opposite the supporting-arm D, said rods G' being arranged substantiallyin line with each other and atri'ghtangleswith saidsupporting-arm. Near the free extremities of the levers E E, and at pointsequally distant from their fulera, coiled springs F F are connected therewith, and the opposite ends of said springs are attached to suitable points on the pulley. In this constructionV the equal weights E evidently counprovided at its closed end with a lug, h', by.

which lit is pivotally connected either with the pulley, the eccentric, or one of the rods G. As here illustrated, it is connected with a rod, G. Said dash-pot cylinder has at its open end a close-tting cap, h2, through a central stuffing-box, h3, on which passes the piston-rod'H. The outer end of this rod is pivotally connectedwith the end of one of the weight-levers E, and its inner end is provided with a piston, H2, fitted to the interior of the cylinder 7L, and apertured at h4. The cylinder of the dash-pot is l filledA with glycerine or some other noncompressible liquid, preferably one that is also not congealable at a temperature to which 4o the engine is likely to be exposed. By means of the dash-pot applied to the relatively movable and stationary parts or to the unequallymoving parts, as described, wide and sudden radial movements of the weights E are prevented, and as a consequence the governor will have a steady and efficient action at all speeds of the pulley or wheel to which said. governor is applied. The aperture l1,4 will be made of such size (according, of course, with 5o the size of the cylinder, springs, and weights) as to allow all necessary promptne'ss of action on the part of the governor, and said aperture may, if desired, be made adjustable to its size by ordinary and well-known means for the purpose.

The dash-pot, while preferably connected with the end of the lever E, may obviously be attached to the eccentric itself and to a iixed or less movable part of the apparatus. 6o

By the term dash-'pot77 in the appended claim I mean the device technically known by that name-usually comprising a closed cylinder, a piston havinga passage through or around it, land a fluid confined in the cylin- 6 5 der, as shown-or its equivalent.

l claim as my invention- In a ily-wheel governor, the combination, with relatively-movable parts, of a dash-pot, substantially as described. p 7o In testimony thatI claim the foregoing as my invention I affix my signature in presence of two witnesses.

ALBERT L. IDE.

Witnesses:

J F. BUNN, CHAs. A.4 ORR.

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