US356525A - Safety valve - Google Patents

Description

. ring H as made` in sections.

l I 'TD lSTATES PATENT GEEICE.

' l- .Assienons TC THE CROSBY STEAM l...no sTON, MAsSACnUSETTs.

"GAGE `AND VALVE COMPANY, OF

SAFETYNALVE.

SPCIFIGATION forming' part of Letters Patent No. 3525.525, dared January 25, 1887. .g

Application illed November E, 1886. Serial No. 218391. (No model.)

TaaZZ 'whom it may concermv Be it known that We, GEORGE HANNIBAL CROSBY and ALBERT CECIL MEADY, of Soia,

tical and transverse section of the Aneck or valve-seat tube, the valve, the chambered ring, and the adjustable annular bottoming of the latter, thechambered. 'ring in this ligure being represented as immovable or inadjustl 'valvefseat tube, in order for suchringto be adinstable in-altitude with reference tothe de- 25'flector. In Fig; 1 the valve-seat tube visrepresented 'as-having two conical bevels at its upper end, whereas in Fig. 2 it is shownas having 'but o'neviz., the valve seat. Fig'. 3 is a top view of th'efchambered ring G, herein- '3oafter referred to. Fig. 4 is a top view of the In such drawings, A denotes the--valve-seat y tube projectingupward from and connected,"

. as usual, to a tubular base or standard, B, on. 3 5 which rests the valve and spring-case C, which 1 l at its lower part is concentric with the valve- "seat tube A, andl surrounds it at a suitable `dis-tance from' it. The upper endof the tube 'A has in it the valve-scat c, which is formed'n 4c likea conic frustum, the valve being corre,

spondngly shaped, as shown at b, to rest` on suchseat. The said valve, likeothers of the s class', is forced downward upon'l its seat by .a spiral spring, E, and such valve has extending '-45 from it peripherally an 4inclined conical de.- Hector, F, Whose iunersu'rface is conical and atfaright angle, or .about so) to the valveseat a., I

Immediately below the deiiectorl F is'the following specification and represented in the 4claims hereinafter presented.. Fig. 2isla verable'vertically relatively to the conical de-l flectorvof the valve, whereas inl Fig. 1 the. 'chambered ring is shown as screwed upon theA `two or more-parts, a, connected at their ends by screws vI'going through projections c'* from such ends, th'eyfenabling the annulus-,to [be Vfirmly clamped in position.--When the eham-y yally therewithgthe springspindle s tep projecchainbered ring G, which, as shown, is pro- 5o vided with an adjustable bottoming, H. The said ring has in it areal chambers or Openings -c extending down through it, the ring projecting above them, and the extension d being' beveled on its inner face, as represented-that is, in parallelism with the lower end of the deiector F, which is at o r about atl a rright angle to the inner face of the deflect'r'. The ring G,which encompasses the seat-tube A, may be applied thereto so as tubeether 6e'k adjustable or in a'dj ustable vertically with reff f 'erence tothe deflector, it being shown in Fig. 1 as screwed upon the valve-seat tube, and in Fig. 2 as firmly xed thereon. .The 'anuulus or bottonuing II also encompasses the tnbegA, and is screwed thereon, so as; to be adjustable in distance from the ring G, and there may be.

screwed either through the caseor transversely y through the ring a set-screw, I, for preventing the annulus H from accidentally revolving on the tube A. When screwed into the case, the, 'screw bears against the periphery of the an nulus H; but when screwed throughvthe an, nnlus the said screw bears against the tube A, (see Fig. 1,) whose outer surface is Screwthreaded to engage with the internalscrewthreading of the annulus. Then the ring G is-inadjustably connected with 'thetube A, as shownin Fig. 2, we Construct the annulus II in bered or' perforated ring G is screwed vupon the l. neck or 'tube A, so as to be adjustable with reference to the defiecto'r F, there -may be to the ring G a stop-screw, K, to keep it from accidentall'y revolving, such screw being shown in"dotted f llines in Fig. 1 as screwed through the case and butting against the ring G, orthe 9o set.'sc rew"may screw through the ring and against the seat-tube.`

."Below the disk or central portion; e, oi' the valve there may hoorde extended concentrictonf, from whchfradiate to the inner cylindrical surface of .the tuberi-A (see Fig. 1) 'ase-A ries of guide-wings, w, allv being as usual in safety-valves. As shownin Fig. 2, the guidewings ze, extending downward from the valve, bear against the interior surface of a guide Well, a', which is integral with the tube A, it beinl'r,r connected therewith' by arms 1/, each of which, instead ol' having its top straight or connected to the tube. A at or near its valveseat, is curved orinclined downward from the top ofthe guide-well to where it connects with the tube Agis seen at .e in said Fig. 2, in order that when heated the expansion of the metal ofthe arms will not change theform of the valve-seat and cause leakage, which will occur when the wings are attached to the tube A near its seat', as experiment has fully deinonstrated. \Vhcn the valve is closed cuits seat, the lower face only of such valve will be exposed to the pressure ofthe steam. Whe-a such pressure may exceed the resistance. ol' the spring by which the valve is held down upon ils seat, the valve will rise slightly and the steam will escapeand impiinfe directlyagainst the conical inner surface ol' the dcllector. The force of impact or the momentum ol' the steam will eansethe valveI to rise higher. rlhe steam on strikingV the dcllector will be .deflected against the valve and also downward into and through tlleopenings ofthe ring (i and against the upper surfaceol' the annularbottoming Il, and will iinally escape into the ease through the space between the dellector and the ring G, and also through that between the rings. The reaction oll the steam on the botloming, together with the force ol' expansion of the steam in the chambers c, will assist in elevating the valve.

\Vith our invention we are enabled to ntilize to very great, if not the best, advantage the impact or momentum ol' the steam escaping bctw en the valve and ils seat. W'e do this by causing,r the steam to strike squarely, or substantially so, against the delict-tor, a'nd by it to be deflected both upward and downward, and into and through or ont ol' the ring G, .from whence it escapes throng-h the space between the ring and the dellector, and also through the space between the ring and its bottoming, as desired, for theregulatingr ofthe poo In case the bottoming be raised up into contact: `with the ring (i, all the escaping steam would be reflected upward by the bottomiin,r and pass oll t hrongh the spacebetwecn the delleetorand the ring- (i, provided the said ring (i be down ont ol' cont-act with the detlcctor.

ln practice our invention or improvement 2. The combination, with' the valve and the inclined defleetor thereof, and the valve-seat tube, of the chambered ring G, screwed or applied to the said tube so as to be adjustable thereon in altitude with reference to the deilector, as set forth.

2%. The combination` with the valve and the inclined detlector thereof, and the valveseat tube, of the chambered ring G, encompassing the tube below and extending downward from the dclleetor, and with the bottoming-ring' ll, screwed upon or applied to the said tube so as lo be adjustable in altitude willi reference to the said ring G, all being substantially as set forth.

4. The combination, with the valve and l, the inclined detlector thereof, and the valveseat lube, ofthe ehambered ring G, encompass ing and forn'iing` a part of the said valve-seat tube, and extending downward from the said detlcetor, and the bottoining-ring H, formed in sections conneeted as described, said ringA beingscrewed on t-hc tube A and clamped in posi-y tion bythe devices which connect its sections, as set forth.

5. 'lhc combination, with the valveI 'prof vided with the inclined deilcctor and the guide-Y wings, and the valvcseat tube having the arms connecting it with the guide-well curved or inclined downward at top, as described, of the ring ti, encompassing such tube and arranged below the said dellector, and the bottoming-ring ll, made in sections and applied to the said tube so as to be adjustable vertically and clamped in position by the devices which hold thesaid sections together, all being as set forth.

6. The combination ofthe ehamberled or perforated ring G, provided with the lip Llinelincd on its inner surface, and extending above thering, as set forth, with the valve and its detlectoi-,and the seat-tube, all being substantially as represented.

7. The combination of one or more setscrews with the ehambered or perforated ring G, encompassing and screwed upon the seat-tubo A,

IIO

andthe valve and its detlector arranged above the said ring, all being substantially as represented.

S. The combination ofthe chambered or perforated ring G,'provided with the lip d, inclined on its inner surface and extending up from such ring, with the valve, the deector inclined on its lower edge, and the seat-tube, all being,r substantially as set forth.

GEORGE HANNIBAL CROSBY. ALBERT UEUIL MEADY.

\Vil nesses:

C. B. Cnosnv, A. 1). Cnosnv, l. 1l. EDDY, 'n lt Tonner.

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