US606404A - Half to thomas e - Google Patents

Description

(No Model.)

W. BURNETT.

VALVE.

N0- AOIL Patented June 28, 189B.

VESLEY BURNETT, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TOTHOMAS E. MORFORD, OF SAME PLACE.

VALVE.

SPECIFICATION forming part of Lettersratent No. 606,4o4, dated June 281898.

Application filed September 4, 1897. Serial No. 650,575. (No model.)

` To all whom t may concern:

Be it known that I, WEsLnY BURNETT, of Cambridge, county of Middlesex, State of Massachusetts, have invented anV Improvement in Valves, of which the following description, in connection with'the accompanying drawings, is a specification, likeA letters and figures on the drawings representing like parts.

This invention relates particularly to that tive initial movement,whereby the certainty and rapidity of 'operation of the apparatus is greatly increased.

Other novel features of my invention will be hereinafter described, and particularly pointed out in the claims, v

`Figure l is a verticalsectionof a valve apparatus embodying my invention shown as applied to a tank and operated by a fioat, the valve being'closed. Fig.` 2 is an enlarged vertical sectional view of the valve apparatus, the float being omitted and with the valve open. through the valve-chamber on the line .fr Fig. 2 and Fig. 4: is apartialA top or plan view of the apparatus;

Referring to the drawings, the supply pipe or inlet a is shown as provided with a flange a to rest upon the bottom of a tank A, the pipe being held in place by a nut ax and connected in the usual manner with the source of supply. The inlet-pipe opens into a valvechamber b by an inlet-port a2, shown as lo` cated near the lower end of the chamber, the latter having a discharge-port b at its lower end, preferably provided with a flaring or bell mouth b2. 4

Above and surrounding the discharge-port and adjacent the inlet a2 is an annular valveseat b3, surrounded by a recess b4, formed in the material of the chamber.

Fig. 3 is a transverse sectional viewl The shell creasing b incloses the parts of valve-chamber b and closes the inlet-port a2 when the main valve is shut, (see Fig. 1,) said piston-valve, however, being movable freely in said chamber and permitting a thin iilm of the iluid between it and the wall of the casing bx.

which is preferably a washer of leather or other suitable material, held tightly in place by a screw l0, and coperating with the an- .Anular seat b3 to close the discharge-port b', as Ain Fig. l.

The lower end of the piston-valve c projects beyond the main valve to form a ring c',

At its lower end the piston-'valve is lrecessed to receive therein the main valve v,

adapted to enter the recess b4 and prevent i cutting of the valve-washer o by the current when opening or closure is being effected.

' The piston-valve is longitudinally bored at c2 to receive therein the head d of a triangular, or itmay be iiuted, stem d, extended up through and guided by the hub b, said stem at its upper end being shown as threaded to s enter a controlling-valve fu and its holder d2.

The valve o' is preferably a disk of leather or other suitable material, adapted to close the outlet of the valve-chamber Z9 when on its seat bl, as in Fig. l.

It will be noticed that the stein d has some longitudinal playin the piston-valve o, so that the latter and the controlling-valve have a limited independent movement, the holder d2 entering a recessin the cover b5 when the valve is closed.

The Vcover b5 of the casing b3 has at one 'side thereof an upturned extension blo, provided. at its top with ears 7312 and with an outwardly and upturned bifurcated arm 513, in which arm is fulcrumed at Z114 an actuating-leverf.

A rocker-arm h is pivotally mounted at h IOO between the ears b1?, saidarm being pivotally connected at h2 with a link 7o, which in turn is jointed at 7e' to the holder or carrier d2 for the controlling-valve 'U'. The rear end of the rocker-arm 72, is divided'to form downturned branches h3, (see Fig. 4,) each having a lateral stud or projection h4, to which are attached the ends of coiled springs s. At their other ends the said springs are attached to a transverse pin j" on the free end of the lever f, said pin being dropped below the main body of the lever. Y-

Referring` to Fig. 2, it will be seen that the fulcrum 7V of the rocker-arm 7L is above a line joining the centers ofthe pin f and studs h4, so that the springs s, acting on its outer end below the fulcrum of the rocker-arm, raise its inner end, and thereby lift the controllingfulcrum, however, by the continued move-` ment of the actuating-lever f they will contract and will with a quick snap suddenly swing the rocker-arm, depressing its inner end and seating the controlling-valve QJ. Such sudden and sharp descent of the said valve acts through the connection d to impart a Vpositive initial movement to the piston-valve c, partially closing the inlet a2, while the controlling-valve has closed the outlet of the valve-chamber b above said piston -valve. The rapidly-increasing pressure of the fluid in said chamber above the piston-valve acts to depress the latter until the main valve t is seated, completely closing the dischargeport, while at the same time the piston-valve c closes the inlet a2. Vhen the lever f is lowered from the position shown in Fig. l untilithe line of pull of the springs is carried below the fulcrum h', the springs will contract and suddenly swing the rocker-arm 7L, elevating its inner end, and the controllingvalve is thereby suddenly raised, so that the outlet from the valve chamber is opened above the piston-valve, and the latter is given a positive initial movement through the connection d to partially open the inlet a2. The reduction of pressure above and the increased pressure of the incoming fluid on the bottom of said piston-valve c then operate to rapidly complete Vthe movement of the latter until the inlet and discharge ports are fully open, the movement of the piston-valve being nally arrested by the hub h6 before the said valve reaches the top of the valve-chamber.. This provides a clearance-space for the entrance of the fluid above the piston-valve when the controlling-valve is shut again.

A radially-notched face f2 on the free end of the actuating-lever f is adapted to receive a similarly-notched enlargement f3 (see Fig. l) on a rod f4, having attached to its outer end a ball or float F, the lever and rod being connected by a suitable clamping-screw f5, the coperating notched portions permitting the rod to be set at an adj usted angle to the leverf. The float F rises and falls with the changing level of the fluid in the tank in wellknown manner, and from the foregoing it will be seen that the gradual movement of the actuating-lever does not effect the operation of the valve. .I ust as soon, however, as the critical point is reached, when the level of the water is as high or as low as desired, the

4connections between the said lever and controlling-valve will operate to move the latter instantly, so that there is no very gradual or long-continued movement in opening and closing the main valve. rllhe latter is promptly moved into fully open or shut position.

Founding or hammering is prevented by the sp1-in g-controlled mechanism, which takes up the force of the blow.

The float is shown as provided with a se ries of perforations f6 to permit the fluid to enter under certain conditions and by its weight depress the actuating-lever.

Suppose the valve to be open and that the springs s have become inoperative through breakage or displacement. Then the rise of the fluid in the tank would continue beyond the proper point without closing the valve and an overflow would be imminent. The actuating-lever fwill be positively stopped by engagement of the depending end f7 thereof with the extension Z110, however, and the rising fluid will enter the apertures f6 in the float, which will then sink, depressing thc lever until it engages the upper end of the link k, depressing it to move the controllingvalve to its seat, and consequently effecting closure of the main valve, whereby the entrance of fluid to the tank will be stopped before overflowing.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

l. In a valve apparatus, a valve-chamber provided with inlet and discharge ports at its lower end, an imperforate piston-valve movable in said chamber by fluid-pressure, to open and close the inlet, a connected main valve for the discharge-port, the chamber having an outlet above the piston-valve, a controlling-valve for said outlet located outside of the chamber, and a positive -connection between the controlling and piston valves and passing through said outlet to effect positive initial movement of the piston-valve while IOO IIO

permitting a limited relative movement of said valves, substantially as described.

2. In a valve apparatus, a valve-chamber having an outlet and provided with inlet and discharge ports, means actuated by fluidpressure to govern the passage 'of a fluid from the inlet into the chamber and out by the discharge-port, and a controlling-valve 4for the outlet of said chamber, connected with and to impart a positive initial movement to said means, and having a limited movement independent of said means, combined with a pivoted actuating-lever for said controlling-,valve having an attached float at its outer end, a rocker-arm pivotally connected with the controlling-valve, and a spring connection between said lever and rocker-arm, to impart sudden throw to said rocker-arm and thereby effect quick movement of the valve when the actuating-lever is moved beyond a certain point, substantially as described.

3. In a valve apparatus, a valve-chamber provided with inlet and discharge ports, an imperforate piston-valve fitting the valvechamber closely and adapted to open and close the inlet-port, a main valve carried by said piston-valve to open and close the discharge-port, an outlet leading from the valvechamber above the piston-valve, a controlling-valve therefor located outside of the said chamber, connections between said valves and passing through the outlet to permit a limited movement of one relatively to the other, and

a spring-operated actuator to effect rapid initial movement of the controlling-valve and start the piston-valve, substantially as described.

4. In a valve apparatus, the combination with a valve-chamber provided with a discharge-port, a superimposed valve-seat, an inlet-pipe entering said chamber above the discharge-port, an imperforate piston-valve fitting the valve-chamber closely and having an attached main valve to coperate with the seat labove the discharge-port, and an outlet leading from the valve-chamber above the piston, of an auxiliary controlling-valve for said outlet in axial alinement with the pistonvalve, means to positively actuate it, and a positive connection `between said controlling and piston valves, to effect positive initial movement of the latter through movement of the controlling-valve, the piston and main valves being so arranged that as the latter moves to its seat the former gradually closes the inlet-pipe, substantially as described.

5. In a valve apparatus, a valve-chamber having an outlet and provided with inlet and discharge ports, means actuated by iluidpressure to govern the passage of a uid from the inlet into the chamber and out by the discharge-port, and a controlling-valve for the outlet of said chamber, connected with and to impart a positive initial movement to said means, an actuating-lever for the controllingvalve, having a perforated lioat attached to its outer end, spring connections between said lever and valve, and an auxiliary connection adapted to be positively engaged by the lever when depressed by fluid entering the float, to thereby close the valve, substantially as described.

6. In a valve apparatus, a valve-chamber having an outlet and provided with inlet and discharge ports, means actuated by fluidpressure to govern the passage of a iiuid from the inlet into the chamber and out by the discharge-port, and a controlling-valve for the outlet of said chamber, connected with and to impart a positive initial movement to said means, combined with a spring-operated actuator for the controlling-valve, to eiect sudden and rapid movement thereof, and a controlling-Heat connected with said actuator and operative independent of the fluid-pressure in the valve, Ito move said actuator into operative position, substantially as described In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WESLEY BURNETT.

Vitnesses:

THos. E. MORFORD, NELSON E. MANN.

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