US942492A - Valve. - Google Patents

Description

G. F. FERNALD.

VALVE. APPLICATION FILED MAY IO, 1907.

QQQAEQB Patented D8017, 1909.

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CHARLE$ l FEBNALD, OF BOSTQN. MASSACHUSETTS, ASSIGNGR TO STAR BRASS MANUFACTURING CDMPANY,

- MASSACHUSETTS.

OF BOSTON. MASSACHUSETTS, A C(flRPOIR-AYIIO'N OT" VALVE.

Specification of Letters Patent.

Patented Dec. 3', tlltltl.

Application filed May 10, 1907. Serial No. 372,848.

To all whom it may concern:

Be it known that 1, CHARLES 1*..FERNALD, of Boston, in the county of Suffolk and State of ll/lassachusetts a citizen of the United States, have invented a new and use ful Improvement in Valves, of which the following is a full, clear, and exact description, reference beinghad to the accompany ing drawings, forming a part of this specification, in explaining its nature.

My invention relates especially to an improved means for evenly seating the valves upon theirvalve seats.

My invention relates also to further improvements in detail of construction all of which can best be seen and understood by reference to the drawings, in which Figure 1 shows my valve in cross vertical section. Fig. 2 shows the same on the line 2-2 of Fig. 1.; r

In the drawings :A represents the hollow body of the valve from which there projects laterally a neck A on which is threaded the bonnet A Through the body of the valve there extends a' straightaway passage of which a represents the inlet passage oi the valve and a the outlet passage thcreot'. Intermediate these passages is the valve chamber a COlIlYllUlllCtlllOll between which and said respective inlet and outlet passages is by way of the ports a", a. 'lhese ports are formed by inward contractions a, a formed inthe body-of the valve and on the internal faces of which contractions are formed the valve seats o, c respectively. These valve seats are constructed to occupy an inwardly inclined position by which the valve chamber interposed between said seats is Wedge-shaped in torin.

B, 13 represent the respective valves or disks which are ada ned lobe contained in the Valve chamber 3 and assume an operative seating position upon their respective valve seats (as shown in the drawings where they close the ports in the passage through i off their seats in the following manner: .-\r ranged upon the respective idcs ol' the body of the valve and extending up into it neck A are what may be termed guides or ways a. These 'ays project inwardly from the shell of the valve and in a direction crosswise the passage through the body ol the valve. 'lheir disposition is su h. al o. that the valves or disks sliding upon thcsc guides or ways. when moved in one plane ot' direction, will become scaled upon. their respective valve seats and will at all timc:-. or when moved into a disengaging nisition hold and maintain an angular position corresponding with that ol? their respective seats with respect to said guides. The disks or valves are arranged to slide upon these guides by forming grooved projections (1 on the backs of the respective disks or valves and in which grooves ol the projections the guides are adapted to be contained. The oi 'tect is that the valves or disks are so maintained that. by moving the same in one plane of direction they may be guided or brought to contact with their respective valve seats without drawing across the taco of said seats. Besides this and even more essential the valves or disks are maintained in an operative position at all times whatever their position or the position of the valve may be, which prevents them from becoming disarranged so as bind. 111 other words, these disksor valves always occupy a normal position to move freely in either direction.

I will now refer to the mode of operating the valves. Upon the neck A is arranged as before described the bonnet A of the valve. v

'lhrough this bonnet and arranged to turn therein is a nolrrising stem (3, titted with a hand-wheel c by which the stem may he turned. 'lhcstem extends down into the intcrior of the valve and in the construction shown even into the valve chamber o. The portion of the stem which is contained with in the valve is made threaded and upon it is arranged to slide up and down as the valve is turned a sleeve 0. On the end of this sleeve is arranged a nut a made preferably elongated and contained in sockets formed by the projections extending as before explained from the backs of the respective Ila-l the valves or disks may be guided to become properly seated upon their valve seats, yet owing to'some slight irregularity in the positioning of the valve seats or relative position of the guides, I prefer that the valves or disks may have a slightly loose fit upon their respective guides, not so loose that it will in any way detract from the purposes of ny'invention above described, but just so loose that the disks or valves may have a chance to accommodate themselves to any slight variation or irregularity in the positions of their respective seats inorder that such positioning of the valves or disks may be easily obtained withrelation to the nut 0 I have so formed the nut that the disks or valves may readily vary or'adjust their positions thereon to accommodate themselves to their seats. Such construction of the nut consists in making the opposite sides of the nut, facing the respective disks and sockets formed therein, cylindrically convegedto fit loosely within said respective sockets andso forming the nut also that the lines of curvature presented by the opposite sides thereof will 'lie in planes positioned at substantially right angles to' each other, the sockets of course being correspondingly coneaved to receive the, convexed sides of the nut. The .convexed sides of the nut being thus disposed from axes on which the respective disks will turn easily with sufficient. movement to accommodate themselves to their respective seats but with no'sueh excess of movement as would tend to their displace ment or wear, the aforedescribed convexed.

formation of thenu't tending also to hold the disks or valves very securely on their respective seats.

Reference has already been made to the factfthat the valve stem C turns within the bonnet A surmountiug the neck of the valve. In this connection it is to be noted that the-valve stem is provided witha collar 0 which is contained within a depression formed in the bonnet of the valve into which is threaded a screw (1", the collar upon the valve stem being interposed in a socket formed between the end of this screw and the adjacent' side of the bonnet. The collar is provided with beveled faces 0, 0 which are adapted to bear against seats correspondingly beveled, formed in the end of said screw and the bottomof the depression i and off their respective seats,

formed in the bonnet. The screw a is pro- *vided with an annular shoulder a resting I upon the top of the bonnet and attached to this is a stutfing-box 04 in which is-con tained a gland a encircling the valve stem and held-in place by a packing-nut (1 By ,mcans of the collar 0 on the valve stem it is held from sliding in a longitudinal direction but permitted to turn. The especial point to be'noted in this construction is the beveling of the sides of the collar which permits them to fit evenly upon their adjacent seats by reason of the fact that a beveled side of the collar will adjust itself toirregularities-in the seat and accordingly make a ti ht fit. Now this is of material importance or the following reason: \Vhen the valve is closed by operating the stem to force the valvular disks down upon the valve seats, as soon as .these disks are fairly seated,-upon a slight further turning of the stem the beveled face 0 will be forced up against its seat formed on the end of the screw a. .fits tight against its valve seat the valve will not leak when closed. When the .valve'stem is turned in a reverse direction for opening the valve the sleeve 0 on the valve stem will rise on said stem until the end of the sleeve contacts with the inside of the bonnet at the point a. Upon a slight further turning of the valve stem the sleeve will be made to hug tight against the side of the bonnet. This acts'to draw the beveled face 0 of ,the collar on the stem hard against its seat and prevents the valve from leaking when open. In case there is a slight leakage this is provided for by the gland'orpacking further up on the valve stem. Moreover, by obtaining a tight joint at the point of the collar I am enabled to remove the packing-nut and re pack the valve Witliabsolute safety Whether the valve is open or shut.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United States i 1. A valve having inclined seats, disks adapted to become seated thereon which disks are provided with sockets formed in the backsthereof, a valve stem by which said disks are controlled, and a nut threaded on said stem the opposite sides of which nut facing the respective disks and sockets formed therein are cylindr'ically convexed to fit loosely within said respective sockets and which nut is so formed also that the lines of curvature presented by the opposite con vexed sides thereof will lie in planes positioned at substantially right angles to each other. v

2. Avalve having inclined seats, disks adapted to become seated thereon, said disks having sockets formed in the backs thereof, means for guiding said disks to move onto a valve stem Now if this face which said disks are (ronlrollml, and u l nut thre; lLIl upon said-stem the opposite sides of which nut-facing lhc rvspovlivc disks and .sockcts formed therein are ylindrically cdnvexml to fit 100501 \vilhm said 1c ;pucti\e sockets v aml hivh nut is so forlnvll also that lhv 111105 of umwmlium pre- 1 xent'ecl by the opposite womcxecl sides thereof will lie in plums posillonocl :al Hlllr right zmg'lvs [0 each other,

CHARLES hhl lflll llALD. Witnesses:

JOHN E. ll. Hum M. E. l lhu llcu'n'.

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