US852709A - Stop-valve construction. - Google Patents

Description

; PATENTED MAY 7, 1907.

A. W. FISCHER & P. W. KNAUR STOP VALVE CONSTRUCTION.

APPLICATION FILED AUG. 4, 1905.

m r L W i M E M 5 J Q 2 INVENTORS.

' A TTOHHEY.

ADJUJBERT W. FISCHER AND PAUL 'W. KNAUF, OF PHIL- DELI-KIA, PENN- SYLVANIA, ASSQIGNORS TO SQHUTTE AND KOERTING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

STGP VALVE GQi'dSsTRUGTlONa Specification of Letters Patent.

Patented 7, 1907.

To will whom it may eon/007%:

Be it known that We, ADALBERT W.

F isoHER, a subject of the Emperor of Germany, and PAUL W. KNAUF, a citizen of the Uniteil S'iICtLS of America, both residing in the city and county of Philadelphia, in the State of Pennsylvania, have invented a certain new and useful improvement in Stop Valve Construction, of which the following is atrnc and exact description, referencebeing had to the accompanying drawings, which form it part thereof.

Our invention relates to stop v lves such as are used in the conduits leading from is steam boilers to engines where the steam is utilized, said valves being adapted to open freely uni'lei' the normal liow of steam and to close automatically in case ior any reason the pressure on the boiler side oi the valve falls below that on the engine side.

The object of our invention is to provide such valves with improved mechanism for Pi'OiIlIfiljf closing against the pressure 0' the steam or other pressure iluii'i passing through them even iv ien the flow is norm ill or excess invention. consists in nroviiiii'ig eoylinrier .ml piston, the o' vlin lei' being conuectcrl with boiler or other soui'ie oi pressure and the piston arranged Whc-n o lilOVill lllliiul' the pressure 'il to act on. 'vzilvi-r in t e (ll *otion of L and in addition to this imon W", pro'inl supplen'ieirtal m0 acting-ig oothcpist i "through no viivi: to olose it, said means lie/int; hehl out oi operation by a releaswe we use in addition to the '45 i'une ion it is to close the f our in ,n'ovcview of the I huziil by pressun, to close the valve is A, indicates the valve chamber having inlet chamber A, and outlet chamber A B, is ec-ap or head for the casing forme as shown With upright arms B, B, which support a guidewsy B.

B", is a pivot attached to the lower end of the head, B", a pivot attache to the upper end of the guideway.

C, is the valve seat, D, the stop valve, h eving, as shown, a stem connecting it with the piston D moving in the lower end of cylinder E, the head of which formed by the cap E.

i is e conduit forfluid under pressure-011$ ing to the upper end of the cylinder E l'iTOIl'l the same source of pressure as that n hich supplies the chamber A".

G, is a pistonworlting in the upperend of the cylinder i end having a stem 6, 0:;- tencling through stulliiv to); in the cap B.

As shown, ll, is a sliding head moving in the guide way and kept from rotating as shown. by a. feather HQ l, is a screw spindle Working on an internally threaded pant N of the head ii, the lo er and of the spindle resting! normally in contact with the spindle U, and the upper end having attached to it hiiiuln hoel l.

J, J, are links secin'ei'l to the pivot 3*, anti to the piv ll, in the ends ol the cloulzle armed lovers 3", which l en; :1 i pivoted to the heznl ii, by it pivot pin ll, thiil hes secured upon their outer will a (:ountvmei J. The lever J, is pi rotslly iiiiechwfl join r.i lli(l1(llll f out l'rom 2L sliding l!L2i(lin moving on 21 1 M so i v pivot Din i5, and i'ormm {L A head ii", firmly securea'l to t Upper J-ml ol' the iUCl K. :aili ipi' s a pivot ii. ii on which is pive the i201 iCYii ii, 1 having it lillls'iil jaw ll, adap ed to e'nggaeii with the hitch jaw si as she ..i-

N, l-52L-11()l(l attached to the sri'n L. of the hitch lover, F h whiel'i it (mi hr- 1'! role: l i This nor-(l mm. lre

s0 mo hon, it-ed l'ijv' any convenient inuchzn'ih'zil connecti either :nitoiimtio oi otherwise.

or normal conditions, and when 171 (a i. open, the pressure in the vhzm'ihei ei's hut little l'ion'i the boiler pressure, nilin its no between the piston i), and the well. oi the cylinder E11, maintains a,

substantially equal pressure in the lower part of the said cylinder and on the lower side of the piston G, which, therefore, by reason of the dillermicc in area of its two faces normolly -lcupies its uppermost position as shon n in Fig. i. 'lhe boiler pressure on its upper face not being sullicient to coui'iteract the slightly less than boiler pressure on its lower and larger face the function of the lower ']')iston D directly attaol'xed to the valve is the familiar function of such pistons, namely, that of preventing sudden movements of the valve due to fluctuations of pressure in the conduit of a disregardahle nature. The head 11, H", together with the screw spindle l, are normally held in their uppermost position, as shown in Fig. 1, by the engagement of the head M, supporting the counterweight lever With the latch lever L, L but llnfllmlh on the release of the latch the counterweight forces down the head H, H and the screw spindle which presses on the end of the piston spindle G, supplements the boiler pressure on the top of the piston forcing it down into contact with the piston D, and

forcing said piston and the valve attached thereto to its seat where it will he held until the cminterweight lever is again raised.

' The screw spindle l, is of course adjustable in the head by means of the hand wheel. l, and can he used. to lock the valve closed in the usual Way, and can also be used to raise the sliding head and counterweight lever to normal position. after the release of said lever from the latch.

Having now described. our invention, What We claim as new and desire to secure by Let ters Patent is 1. A stop valve for controlling the llow of fluid under pressure through a conduit, in combination with a cylinder connected to the same source of-fiuid pressure as that supplying the conduit, a piston in said cylinder an ranged when moved under the influence of the pressure fluid to act on the stop valve in a direction to close it, means for applying additional pressure to the piston, and through-it, to the valve, and a releasable latch normally holding: said means out of operation.

2'. A stop valve for controlling the flow of .lluidunder pressure through a conduit, in combination with a cylinder connected to the same source of fluid pressure as that supplying the comluit, arranged in line with "the valve, a piston directly connected to the valve and working in the cylinder, a second piston working in the cylinder above the first and directlyexposed to the action of the pressure 1 iluid means i or applying additional pressure to the upper piston and through it to the valve, and a releasable latch normally holding said means out of operation.

A stop valve for controlling the flow of fluid under pressure through a conduit, in combination with. a cylinder connected to the same source of fluid pressure as that supplying the conduit, arranged in line with the valve, a piston directly connected to the valve and working; in the cylinder, a second piston working in the cylinder above the first and directly exposed to the action of the pressure fluid, a stem connected to said second piston and extending through the head ol the cylinder, a threaded head slidably supported in line with the piston stem, a rod screwing in said head and normally resting on the end oi the piston stem, means tending to depress the head and screw rod and a releasable latch normally holding; the head in elevated positioin l DALBERT W. FISCHER. PAUL lV. KNAUF.

Witnesses 1 Anson) liners,

l). Fi'rnwmrr.

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