US506534A - Centrifugal shaft-governor - Google Patents

Description

(No Model.) e s NEELEY I GENTRIPUGAL SHAFT GOVERNOR.

Patented 0m 10, 1893.

UNITED STATES PATENT OFFICE.

.GEORGE s. NEELEY,oEPAoI Io, MISSOURI.

CENTRIFUGAL'SHAFT-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 5Q6,534, dated October 10, 1893. Application filed July 5, 1893. seriitiitc. 479,604. "(to model.)

To all whom it may concern:

Be it known that I, GEORGE S. NEELEY, of Pacific, in the county of Franklin and State of Missouri, have invented a new and Im-.

proved Centrifugal ShaftGovernor, of which the following is a full, clear, and exact decription.

The object of the invention is to provide a new and improved centrifugal shaft governor for engines, which is simple and durable in construction, very effective and sensitive in operation, and arranged to accurately govern the motion of the valve of the engine, to insure uniform running of the latter.

The invention consists principally of a pivoted eccentric disk adapted to move across the driving shaft of the engine, and connected with a central gear wheel yieldingly connected with the hub of the governor wheel secured to the driving shaft, and weighted and spring-pressed segmental gear wheels mounted to turn on the said governor wheel and in mesh at opposite sides with the said' central gear wheel.

The invention also consists of certain parts and details, and combinations of the same, as will be hereinafter described and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming 'a part of this specification, in which similar letters ofreference indicate corresponding parts in all-the figures.

Figure 1 is a sectionalface view of the improvement on the line llof Fig. 2. Fig. 2 is a transverse section of the same on the line 2-2 of Fig. l; and Fig. 3 is a rear face view of'the central gear Wheel.

'On the driving shaft A of the engine is socured the governer wheel B, having its hub B extending through a segmental slot 0 formed in an eccentric disk 0, connected in the usual manner with the valve of the engine.

The eccentric disk G is provided with an outwardly-extending arm 6 pivotally-connected at O on the governor wheel B,-and opposite this arm 0 extends from the eccentric disk 0, a second arm 0 formed with an elongated slot 0 engaged by a wrist pin D, secured on a central gear wheel E, mounted tolrotate loosely onthie -hl1b*; B' of the gov ernor wheel B, the central 'gear wheel E has a yielding connection with the-hub B; and

for this purpose a coil spring E is provided,

and F, mounted to turn on studs F and F respectively, secured on the governor wheel B.

From the segmental wheels F and F extend outwardly, the arms F and F respectively, on which are mounted the weights G and G, respectively, adapted to be shifted on the said arms and secured in place thereon by suitable set screws G The said arms F and F are also connected with springs H and H, respectively, adapted to be fastened on bolts H H respectively, secured on the governor wheel B. For reversing the engine, the said springs are disconnected from the bolts H and H and attached to bolts H and H respectively, also held on the governor wheel B, but on opposite sides of the arms F and F", as will be readily understood by reference to Fig. 1. The free ends of the arms F and F are guided in guideways I and I,

respectively, both secured on the face of the governor wheel B, and on the said guideways are arranged adjustable stops J, J, and J J respectively, for adjusting the position of the said arms F and F according to the desired lead to be given to the engine. When the engine is running in one direction, the stops J and J are in use for the arms F and F andwhen the engine is running in an opposite direction, the other stops J and J 3 are employed.

On the armG of the eccentric disk (1 is formed a pointer 0 indicating on a graduation K, secured or formed on the face of the governor wheel B, the said governor indicat-- ing the point of cut-ofi for the engine valve, whether the engine is running forward or backward.

The operation is as follows: The operator in charge of the engine first adjusts the stops J and J 2 on the guideways I and 1 according to theamount of lead to be given to the engine, it being understood that the arms F and F are limited by the said stops in one direction, so as to hold the eccentric disk O in the proper position according to the amount' of lead to be given, say, for instauce,one-half the springs H and H" acting on t-heiarms F and F will cause the segmental gear wheels F and F to rotate the central gear wheel E, so

that the wrist pi-n D thereon .movesthezarm-C ;v

into an outermost position to full stroke position. Hence, the engine-would havenolead.

5 mined-dead given and the-zstopsJ- and J are 'adjusted accordi-nglwthen thwpos'itionofthe eccentric diskiG :isohangedz in-acase f an increase of*speed,-'=as the weights iG-ianda-G will 20 then impartvwa swinging motion-Ito the'arms' F ian'dF' -in thezdirection vof' th-e arrowsza/iand b' 1 respe'oti-ve'ly',iand:against the tensionof their springs *H-ian-d il -respectively. "I -his movement of *the arms-T :andzF tca uses a turning; 5'.

by the flcentral geariwheel E istunned inithe direction ofi the iarrow o'., so' that the --wri st piu "D'l is moved to the ri g htmncarer to the izero' point of the: graduation The movement vtheeccentric' disk -O, w hich ithius is shifted} acress the sha'ft A to fbring itswceniter nea'ren "to the center of the main driving-shaft ""Phe "stroke of the 's-lide valve is th-us:'--de-j f eneased amd less= steam is admiitted ito-the e11-; ,gine .uantil the speed -of the flatter a has "de-% creased 1 0 :a :normal -=-rate. As soon :as :thei speed'rcornmences to decrease, *the springs' k H "overcome the centrifugal forcer-of the; weights-G, G wh'ereby the :-:.arms F F are mo-ved -in the inverse direction-of itheaarrowsf a' -amil bv thus :causinga turning of wt he=segmenztal gear wheels 'F and 5F; which turnth e; :cen-tral gearwheelE in the inverse-direction? of *thearrow c', auntil thesaid arms li -and Fi again rest on their :stopsJ and-J The re turn movement of 'the centralggearrwheel E causes -a shitting" ofthe eccentric 'disk O; Joyt the' wristipin l D, until the pointer- 0 again 0. S sired lead for which the engine iszset. lt-is understood that the governor has the power; "to afiect the-speed of the engine-soon a fiter startingpon account of the travel of' thea-rms: -F and F being shor-tenedas well as the stroke of -the eccentricdisk Qwh-ichcauses the val-ve *to' cut'off the steam supply asmnch less'than' one-half of the piston stroke, whioh-allows the engine to do the g-reatest part of its-work theiexpansionof I the steam shut up in 'thecyli .ind'erand -at less than =one-half'of1the :piston' stroke. The-engine-can thus be-run' very economically; as far as the steam 1 consumption is concerned. ilaving thus-fully-d-escribed my invention,

When the engine is running with a predeter of the segmentalzgear w heels Eand F', wv=h ere-.

*stands' on the -proper mark indicating ithefide I claimas new and desire to secure by Letters Patent- 1. A centrifugal shaft governor, comprising a governor wheel adapted to be secured on the driving shaft of the engine, a gear wheel havingayielding connection with the said gover-nor wheel and'mounted'to rotate on the hub of the said governor wheel, a wrist pin held ..on thesaid geariwheel, and an eccentric disk having a segmental slot to permit the disk to move across the main driving shaft, the said neccentricediskvbeingrenigaged by the said wrist pin and also pivoted on said governor wheel, 'substan'tiallyas shown and described.

2. A centrifugal shaft governor, comprising a governor wheel adapted to Joe-secured on :the drivingshaftvofthe engine,' a gear wheel having :a yielding cenneetion withi the :said govennorwheel andimownted to trotateion the -=huib1of ithe said govennor rwheekaawrist upin :held' on thesaid gearxwheel, anaeccentric'disk having a segmental slot topermit thepdisk-to amovezacrossihenmainzdriving=shaft, the said "-eccentnicid-isk being-engagedibyxthe-said-wrist ipin and :also =ipiv=oted on i the -1sai'digovernor swheel,zandweighted:spninggpressed:segmental :gear iwheelswosciil lating 3011 the *saidwgovernor and inimesh with the saidoentralagearawheel, substantially as:shown -andtdeschibed.

13. Aicen trizfiugal; sh aftggovernomcompr-isin g :aacentralgeamwheelifor:shifting :theeccentric :disk zacross the main id rivi-ngshaft, segmental gearewheels'iheldiion itheggovennorwheehand i in :m-esh with the :saidiccntralgear wheeh arms nprojecting vfrom l the said segmental gear cwheels andicarrying\weigdrtspand;springsvand stops for il-imiting the movemen'trzof :theasaid aarms rsubstantially as:show n \a'ndidescrib'e'd.

4. A centrifugal shaft governonaoompr-isin g '.:a= governor-wheel,:a acen'tral gear wheehon the said governor wheel and adapted 'to shift the :-eccentric :across the: wmain driving shaft, .segmental gear wheels in meshwith-theisaidcen- 5 1tralgear *wheel and imounitedito. turn on the -1said gear wheel armssproj ectingfromthesaid segmenta'l gearswheelaweights f'sheldz-fid jllstably on: rthe z-said ;arms,:springs;attachedto the said governor wheeland connected with the :said arinsnanduadj'usta'ble stops on thesaid ment-0f the'saidarms'zin -onex direetiom-substantially as shownqand'described.

; 5. -A centrifiu galshaftgovernor;comtprising :.a -governor-whee1, a central'gearawheelion the said governor gwheel andiadapted itoshift the r eceentriclacross the main -dI'l'Ving 'Shfl'flJ, segzmentalgea'rwheels dHzmBSlI-With the-.said'centraligear-iwheeltandmounted :toturn ion, the 5saidsgear-wheel armsiproj ectin g from the: said segmental geariwheels, weightswheld vad justia'bly: on: thesaid -arms,-.springs attached .to 1 the said governor iwheelvtiandiconnected with the said zarms,andaadj ustable -SIO'PSAOI1? the a said governor wheel: andtadapted to ilimit the movement of the :saidiarms iin'ronesdirection,

"governor-wheel and adaptedito limit themoveawrist pin held on the said central gear wheel, tion, of the gear wheel, E, segmental gears and an eccentric disk pivoted on the said govmeshing therewith and having weightedarms ernor wheel and having a slotted arm engaged F F springs for holding the-latter in norby the said wrist pin, substantially as shown mal position, and stops which are adjustable 5 and described. on concentric guides, as shown'and described. I 5 6; In a centrifugal governor, the combination,with the engine shaft, the governor wheel, GEORGE NEELEY' having the graduation, K, the eccentric disk, Witnesses: having a segmental slot and slotted radial arm, J. W. OTTMAN,

:0 C, which serves as a pointer on said gradua- H. A; BOOTH.

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