USRE10559E - Half to octavius b - Google Patents

Description

THOMAS` )I HALF T() OCTAVIUS B. G

ALeoLMsoN, or on. cirr,

PENNSYLVXNIA, ASSIGNOItOF ONE- ()ODWYIN, F SAME PLACE.

STEAM-GOVERNOR Original No. 259,427, dati-d December-1,1

To all wlw/n, z' may concern.' Be it known that I, THOMAS a citizen ofthe United States, residingat Oil City, in the county of Venango, inthe State of Pennsylvania, have invented eertain new and useful Improvements. in Steam-Engine Governors, of which the following' is a full, clear, and exact description.

My invention relates to that class of steam- Io engine governors which regulatethe supply 0f steam to the cylinder by means of a th rottle-valve placed in the steam-supply pipe, which class is generally known as throttlinggovernors."`

My invention consists in providingnew and improved means for regulating the throttlevalve from the centrifugal act-ion of the {1yxreights, which means are broadly follows.

-I connect the throttle-vane stem with the re- 2o ceprive pai-tof a friction-clutch, and with a counter-balance to resist the action of thegenerative or impinging pai-'t of said frictionclutch, and I so apply the fly-weights to the said impinging partof 'said friction-clutch that they regulate the degree of friction gencrated by their centrifugal action. Cerisequently, the action of the said counter-weight or eounterbalimce i the fly-weights are more or :got-ated. The object of this co secure so very sensitive a device that it will instantly respond to changes in the load or stealn conditions, as will herciuaft er fully appear in this description.

In the accompanying drawings, Figure l is a perspective showing my governor upon a horizontal shaft secured to the throttle-valve ome'as less rapidly ros morc o`r less overc ltLiLeoLMsoN,

nstrnetion vis to' easing. Fig. 2 is a longitudinal vertical section ofthe same, but detached from the valve- 40 casing. F1g. 3 is a transverse section of the revolving disk, its spriu rounding disk; and Fig. cations-of a gov stru'cted in accor Like letter figures.

A represents the throttle-valve chamber7 which is supposed to be connected with the steam-chest, and the valve therein will regulate the supply of steam in` the usual wellknown manner.

4 represents modifiernors spring-weights condance with my invention.

t s referto like parts in all the g-weights, andsur-` 59, dated February 1U, 1885.

53. Application for reissue filrd September 17, 1R84.

B represents a brackctsccured in any suitable manner to the end of the valve-chamber from which the valve-,stem lnotrudes, a stuft'- ing-bok, G', being provided for packing the 55 valve-stein. A shaft, O, is seated in the apex or arch ot' the bracket and secured thereto by a nut, c. The valve-stem G has its outer end seated'or journaled Ain the end ofthe shaft. The shaft U, which is thus rigidly supported 6o by the bracket, serves as a journal for the fianged disk D, which I shall designate as the receptive part of a clutch,H and alsofor a second disk, E, which I shall designate as the lactive partot' a clutch,77 rigidly secured or formed integral with a sleeve, E', also journaled on said shaft, and to which the belt- A pulley Ezis also rigidly secured. These parts, which are loeselyj-ournaled on the shatt'G, are held against longitudinal movement by a nut, c', 'at the end of the shaft. The shaft C is hollow throughout a portion of its length suflicient in extent to serve as an oil-chamber for the sleeve IG. perfor-ationscL being made in the walls ofthe chamber and tillcd with wooden plugs or liber the grain of which disposed lengthwise in the perl'orations, in order ,to conduct by capillary attraction the oil from the chamber through the porl'oratious and against the inner or I )eariug surface of the sleeve. An elbow7 U, is fitted tothe outer end-of the oil-chambei and -is provided with an oil-cup, (J2. The disk l) is provided in .this instance with aprojcctiiug arm, D, to which is adjustably secured the counter-bal- 85 alice 1). By this means the resistance of the counter-,lullance against the friction applied to rotate the disk maybe varied to suit requirements. Further on I will describe au alternative method of connecting tinA eminterdialanceto the disk l). The disk Dis the receptive part of the frietioirclut'ch above nan-led.

It is connected with the valve-stem (l by an arm, lt", attached rigidlyijo the lstem and to a stud, F, on thedisk, and therefore as the disk 95 Dis moved on its journal the valve-stem is similarly moved. A second post, L, serves a stop to limit the movement ol' the disk.

Motion is communicated from the rotating Sleeve E' to the disk l) as. follows: disk E are secured,in this ius tance by tlat arcsuitahly bent and consprings E, which are To the roo l'orlnedtoits periphery, weights l', which are in this instance retained inwardly bythe said springs, and lie when the parts are at rest upon the periphery of the disk E, and below but not in contact with the flange ol' the disk D. Friction-pads e are secured to said weights in dovela-il recesses on the outer or upper surl'aee of said weights and in such position as to impinee upon the inner surface ot' the flange of disk l) when the weights are thrown out centrifngallyby the rotation of disk E. These partsv viz. the weightssprings,and disk lil-l call the actuatingl orinipinging` part of said frictionclutch.` The small weights lll* are the ily-weights of the governor, and the springs lll:5 are the arms oi' said weightsand the action of said weights as they are thrown out centrifugally is a frietional action upon the ilange of the disk D, the degree ol' friction depending ou the degree of momentum given to the disk F. rlhe action of the counter-lg alanee is to keep the valve open, and the action of the Vfriction-clutch is to overcome the counter-bal ance and close the valve. The counter-balance, by its adjustment on the arm D', determines the normal speed of the engine. lf it is adjusted near to the disk, its weight is more easily overcome by the friction-clutch, and hence the valve will be moved to a close with the engine running at less speed than if the weight is farther ott from the disk. The operation is as follows The position of parts shown is that which they occupy when the engine is at rest, the valve is wide opeii,and the two parts of the friction-clutch are disengaged. 'Vhen the engine starts,motion is given to the pnl-ley lll by the governor-belt and the sleeve ll and disk l'l are rotated. As soon as the speed becomes snllieient to enlise the weights il* to overcome the reti-active force of their spring-arms sul'liciently for them to impinge upon the receptive part of the frictioxrelnteh and produce l'riction thereon, the counterweight will be lifted and held in suspension, thus moving the valve toward a close, the parts assuming; such a positionas will keep the engine at ils normal speed `until changes in the steam or load condition occur. Let it be su pposed that a n increase of steam-pressure occurs. lt will tend to increase the speed ofthe engine; but this will carry the weight higher and move the valve farther to a close. 'Then let it be supposed that anincroase ol' load occurs. lhis may be sudden, and it' it is,itwill canse a sudden shock to the momentum ofthe t me which will be instantly felt by the iiywelghls, which will momentarily release their pressure on the receptive part of the friction clutch, and this will l'ree that part-evi`/,., the disk lJ-and the weight D2 will drop and open the valve i 7ide again, the increased volume of steam will at once overcome the added load, and thc engine will assume its normal speed, which will ol' course cause the friction-clutch to again litt the weight and more or less close the valve. lf the added load, in place of being,` added suddenly, should be added gradually, the engine would soon begin to slow down gradually,and the friction in the clutch would not be suflicient to retain the weight up as far before, and it would gradually tall and so open the valve slowly until a proper opening would be had to supply snilicient steam in carry the load at its normal speed.

In all ily-ball or centrifugal govermins a con i sidcrable change ot speed is required to overcome the inertia of the balls so they will more into another plane or orbit, and hence they are not t'ielicately sensitive to changes ot conj dition; butin my governor the weight l'f is not thus affected by the velocity ot' the rotating parts ofthe governor. The real liy\.'eighl E* lll", by reason of their springt-arms, are very sensitive, and, besides, they do not move in the orbit their centrifugal i'orce would bring them to but are kept back from it by the receptive part of the frictimrclnlch, and hence they do notvaeqnire that inertness they would il'ginoving in snelrorbit, but.r on the contrary, beet-nue more sensiliveto changes ol" Condit iol A2 very slight diminution ol the tion which keeps the weight ilsnspen williallow it to drop. lherotorc my governo is exceedingly delicate in its action and tive to very slight changes in the conditions of steam or load, and `very perl'ect results are attained. lt is apparent that many inodiliea` tions or variations in the mechanism oi a gevernor constructed in accordance with my invention are within the scope ol' mechanical skill-as, for instance, instead ot the ilataresprings conformed to the periphery ol' the disk l5, arms It, as seen in Fig. l, maybe hinged to the periphery of the disk lll, and provided with frictional weights ef, retained l'roin the disk l) by retractiblc coiled springs. Elliptical springs i, secured to thcperiphei-y ol the disk lll, may be interposed. between the ,flanges of' the disks l) and lll and weights secured to the outer leal' thereot'. (loiled springs maybe secured to the inner disk and provided with radiatiiig-weightsj, and adapted to slide in grooves therein, and project against the liange of the outer disk. -llurthermore, the disks may be in skeletonform-that is, comprising hubs, spokes, and flange. Il' desired, one or more of said spokes may be hollow and a weight incloserl therein in the l'orm of a piston, secured to the hub or spoke by a retractiole spring. Other means may be employed for lubricatingthe journals ol' the moving partsA instead ol" the exterior counter-balance, lli, beingsupported by a rigid arm to the disk D, a strap or chain winding upon the periphery of the disk, and having a (munter-balance attached theroto,may be employed; or a retract ible spring,r may be secured to the arch il at one end and to the arm F or post F or Fi at the other end, to take the place and perform the functions of the countorhalance. A helical spring placed between the disks l) and E,

ics ms sie y intrposed weights connected by springs these (sks, n] v Y said m0205041 disk, with counter-balance iifs described Qquvaleu Secund fo h n'cl0salive c'malrmf-ions fsing-disk? :md n10-ms fm' rcvolvng theinclose Timm-fn) j 'MMSON

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