US913650A - Pump-governor. - Google Patents

Description

J. F. SBNTER. PUMP GOVERNOR. APPLICATION FILED 0019, 190s.

Patented Feb. 23, 1909 latin/nuff,

UNQTED STATES, PATENT UFFCE.

.JOHN F. SENTER, OF CHATTANOOGA, TENNESSEE, ASSIGNOR Ol" ONEJIALF TQ J. BOND,

. Ol" VNAT'IANOOGA, 'PENNIISSEIL PUMP'- GOVE RNOR.

Application filed October 9,

Specieation of Letters Patent.

l:Patented Feb. 23, 1909.

190s. serial No. 456,999.

To all whom it 'may concern:

Be it known that l, JonN F. Snu'rna, a citizen of the United States ol America, and

a resident of Chattaiioinga, county of llainilton, State 'of Tennessee, have invented eertain new and useful lm Movements in Pump- Governors,`of which the followinff a lull and clear specification, reference beine; had to the accompanying drnwin s, in whiehn- Figure 1 is a vertical soot', .al view taken longitudinally through the valve. easing; Fig. 2 is a vertical section taken at right aim-les to the line onv which l taken. i

The object ol this invention is priunrrily to provide a simple and durable automatic eutol' for pumps andin its preferred eonstruetion it embodies means whereby it may be converted into a pressure reducing` valve, as more fully hereinafter set forth.

The. valve easing a is adapted to be oonneeted at one ond b to a steam generator und at its .other end n to thel valve ehest of the pump. The, valve Consists of a pair of horizontal disks d mounted on avertieal stem e and ada ted to elose by dropping;l down .to

a pair o circular oponlngsf in the partition walls of the valveeasing, in which openin s the valve disks'are adapte-d to aeeinately lit. The upper end olV Lie valve stein is at! taehed to an elongated piston g which works ina cylinder 7L formed integral with the valve easing, saidpiston being provided with annular grooves to forni water paekings. On to of the Cylinder /t an extension A/z/ of the. ey-inder is bolted, this extension boing` provided at its upper end with a tapped opening k for the attachment of a small pipo whirl; muy be connected with the discharge pi pn ol the pump.

A lateral integral easing;V l is lornied on the Section t ol' the eylindor, and depeiulinfg from the outer endwoll this easing l is a tubo m, this tubo hein?,I removably seren'ed to a nipple n depolulin;` l'roui said easingI l. '.lho lower end ot'rtuhe, in. is closed h v a cap o through which is tapped an zuljustablu tension screw p whose inner end is eonnerted to the lower ond ol' the ronlrzutile spring q, the upper end of the spring being; eoniueled lo the Outer end ol a lover r pivotally mounted on a horizontal pivot s in the easing Z. l'lu inner end of this lever r enters a trans-versil slot in a piston Iu adapted to reeiprorate iu the upper )art ol' the cylinder and provided with annuler grooves lor water parkings.

wardly until it strikes the depending stem o olt the upper piston. The pressure of the strani will thus hold the valve open until the pressure in the discharge )ipe oi thepi'nnp is sullirient to force down the piston u against the combined net-ion of the spring,` and the steam presa-iure, whermipon the piston g will be loi-eed down und the valve i lsks moved into their nicely littiny holesf and thus shut oli' the teem to the pump andpieventing the punip l'ioin bursting the pipiiu; out ioints.

.As soon :is the pressure is relieved on theI disehauue lint` ol' the pump by opening` a suitable alv e the steam airain automatically opens the governorvulve which admits steam lo the punip. As is obvious, any suitable arranfrenunt ol' pipes and valves may be used to muse the excess-.olE pressure in the discharge line ol' the pump to bo transmitted to the upper end oll the upper piston. lt will be observed that the tension ol' the spring holds the upper piston up out ol' the way and leaves tlu lower piston free to be raised by the. pressure ol tlu` steam` ln the upper end ol' the` easing l is screwed a renui'vzzble plug); ro and on the upper side of the easing, in axial aliueinent with tho de. pending' nipple 'n is an upwardly extending' nipple fn( uhieh is elosed h v u removable. Cap .1'. 'this eonstriu-tion enables the action of the tension springv to he reversed to convertthel device into a pressure reducer. 'l`o thus Convert the device into a pressure reducer the lever r is turned over by removingl plus;

u: and the eylinder nl is removed l'roln the lower nipph und is serewed onto the upper nipple, :is shown in dotted lines in Fig. 2, thus musing the inver-ent ol the lever to torre the upper piston dounn'ardly against piston q und thus normally tend to elose the valve. When thus used as a pressure reducer the inlet /r is piped to the line leading from the outlet side ol the valve so that when the pressure inithis outlet line reaches or loreing @Q el@ a plredetermined degree said pressure, toget er with the tension of the spring, Wlll .cause the upper piston to force the lower piston to closed position and hold it closed until the pressure in the outlet line is reduced to the desired degree.

It will be observedvthat I avoid the objection cfa seated valve joint by having my valve disks d pass bodily into the steam passagesf, these assages being so machined as to nicely 'fit tie dislrs and make a prac ticallyY steam-tight joint, thus 'proven ting accumulations on the valve seats interfering with the proper action of the valve. rl`he valve disks are exactly thesame size so to be balanced. A further feature is the doing away with packing rings on the pistons, these pistons consisting of' elongated metal cylinders turned and ground to nicely 'fit the bore of the cylinder and having each series of shallow annular grooifes. These grooves lill with water of condensation or with water which has been pumped into the top of the cylinder and thus forni lubricating` packings. The water of condensation will keep these. grooves lilled constantly and thus at all times provide for easy movement of the pistons and also prevent the escape of any appreciable amount of steam.

lIn the plug w is formed a small hole w to put the interior of the casing into communication with the atmosphere, so that if any steam gets by either piston it udll escape to the atmosphere and will not interfere with the o eration of the pistons in any Way. Ylt Will e observed further that l ma f use a very light spring in view of the fact that i provide against the pistons or valve disks sticking. Furthermore, there is tendency for all springs that are subjected to the action of high temperature steam to lose their temper and become Weak, but my spring will maintain its temper and adjusted tension in view of the fact that l at all times kee the spring chamber in communication Wit the atmosphere by means of the opening w/.

Having thus fully described my invention, What l claim as new, and desire to secure by Letters Patent, is:-

1. In a cut-off of the class set forth, a valvel casing having a cylinder communicating directly With the vinterior thereof, a gravitating lower piston working in said cylinder and i having its lower side exposed to the pressure the upp er in said valve chamber and'carrying the cuto valve, an independent piston Working ni end of said cylinder, the upper end l i i l l l l l l i l i l l eac of said cylinder being provided With an openmg adapting it to be connected toua pressuresource, and an adjustable tension device adapted to normally hold up the upper piston.

2. in a cu t-ofi of the class set forth, a valve casing having a cylinder communicating with the interior thereof, a lower piston Working in said cylinder and carrying the cut-oif valve, an independent piston Working in the upper end of said cylinder, the upper end of said cylinder being provided Withv an opening ada ting it to be connected to a pressure source, and a reversible adjustable tension device adapted upper piston upwardly or to force it downwardly.

ln a cut-off of the class set forth, the combination of a vlave casing, a cylinder comuninicating with the interior thereof, a cut-oil' valve and an operating piston connected thereto and Woriing in said cylinder, a piston vorking in the cylinder above the aforesaid piston, and a reversible tension device operatively connected to the upper piston, for the purpose set forth.

e. .in combin ation, a valve casing having a cylinder coi iniunicating with the interior thereof, a piston in said cylinder carrying the cut-oil' valve, another piston working in the cylinider beyond the aforesaid iston and prpvidcd with a transverse slot, a lateral casing' connected to said cylinder, a lever ineither to normally force said working in the slot of thc piston, a spring attacl'icd to the outer end of this lever, a lateral casing inclosing the spring, and a tensioning d cvice for the spring.

5. ln con'ibinatiomv-a valve-casing having a vcyliiuler communicating with the interior thereof, a free piston working in said cylinder and having its under side exposed to pressure in the valve chamber and carrying the cutoff valve, another piston Working in said cylinde-r beyondv the free piston and adapted to contact therewith, an actuating lever working through a slot in said-'cylinder and in a slot in the second-named piston, and a tensioning device connected to said lever, for the purpose set forth.

ln testimony whereof l hereunto ailix my signatur-ein the presence this 7 day of Oct, 1908. l

JOHN F. SENTER. Witnesses H. G. WA'rsoN, 0, P. S'rnW/in'r.

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