US760913A - Valve. - Google Patents

Description

. UNITED f STATES Patented May 24, 1904.

PATENT OEEICE.

JOSEPH W. NETHERY, OF INDIANAPOLIS, INDIANA, `ASSIGNOR TO THE NETHERY HYDRAULIC VALVE COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF NEW JERSEY.

VALVE.

SPECIFICATION 'tallllnillg1 part of Letters Patent N0. 760,913, dated May 24, 1904.

y Application filed July 13, 1903. Serial No.. 165,294. (No model.)

To all whom t may concern:

Beit known that I, JOSEPH W. NETHERY, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented vcertain new and useful Improvements in Valves, of which the following is a specification. Y

The principal object of my invention is to produce a valve which is incapable of being 1o held open continuously. VIts distinguishing feature consists in the introduction of lost motion between the operating-handle and the auxiliary or starting valve which it operates, thereby permitting the main valve when started in either direction to complete its travel regardless of the said operating-handle. Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar 2o parts, Figure 1 is a central vertical sectional view of a-valve embodying my said invention, the main valve being in its lowermost position; Fig. 2, a similar view with the main valve in its uppermost position,` said main valve itself, however, being shown in elevation instead of in section;- Fig. 3, a top or plan view of the complete valve; Fig. 4, a horizontal sectional view thereof as seen when looking downwardly from the dotted lines 4 4 in Figs. 1

and 2; Fig. 5, a top or plan view of the upper end of the valve whenv the cap to the valvecasing is removed; Fig. 6, a horizontal sectional view as seen when looking downwardly from the dotted line 6 6 in Fig. 1; and Fig. 7

a view similar to aY portion of Fig. 1, but on an enlarged scale.

Within the valve-casing 10 is a'valve-seat `1.1 in the form of a diaphragm. VThe valve v12 is a piston-valve and preferably hasl two seating- surfaces 13 and 14, which are respectively adapted to rest upon the upper and lower sides of the valve-seat 11 when the valve 'is closed in either its lower or its upper positions. The central portion of said piston-valve 12 is of smaller cross-sectional area than the seating ends, and the iiuid flows through the resulting opening as the valve passes from one position to the other. The flange having theY lower seating-surface 14 also seats into a diaphragm 16 when the piston-valve is in its 50 lowermost position, as shown in Fig. 1. Above the piston-valve 12 is a chamber 21. A by-pass 22 leads from the ingress or fluid-supply opening 23 to this chamber, and the size of said bypass is preferably controlled by an adjustingscrew 24. As the upper end of the piston-valve 12 is larger than any Aother surface thereon vwhich is exposed to pressu`re,this will cause the valve to be held down by the pressure of fluid in said chamber so long as the Huid is therein 6o confined. To enable the valve to be operated, an outlet by-pass 25 is provided, which in the present instance is a central perforation extending down vthrough a stem 26 and at the upper end opening out to one side of said stem. Upon the extreme upper end of said stem is an auxiliary or starting valve 27, which when seated down onto the vupper surface of the main cylinder-valve 12 serves to close the escape-opening or by-pass 25, but which when raisedrleaves free access to said escape-opening or bypass, permitting the iiuid which would otherwise be held within the chamber 21 to escape. The size of this opening 25 should be somewhat greater than that 75 of the opening 22 in order that when it is opened the` fluid in the chamber may escape more rapidly than it will enter through said by-,pass 22. An adjusting-screw 28 is provided by which the effective size of the opening can 8O be regulated. As it is necessary in the construction shown to move the stem 26 up and down somewhatA and as it is also desirable that it should remain at an adjusted point, I provide a friction means for` holding it to such adjusted point, said friction means consisting in the construction shown of aJ spring 29, which is mounted in a suitable groove in the stem 26 and which will press outwardly against the interior of the perforation in the main piston-valve 12, within which said stem 26 is placed. The stem 26, as will by this time be readily understood, is to be moved whenever desiredl that the valve shall be operated. In my present construction I do this by means of a rock-shaft 31, carrying an arm 32, which engages, by means of a pin 33, with a slotted link 34, which is connected, by means of a pivot 35, with the lower end of the stem 26.

rIhe operation may be stated as follows: Assume that the valve is in the position indicated by Fig. 1 and it is desired to secure a iiow of fiuid therethrough. The shaft 31 is rocked until the arm 32, through the link 34, forces the stem 36 upwardly suiciently to raise the auxiliary or operating valve 27 off its seat. The fluid in the chamber 21 will then escape, and the main valve 12 will then ascend until it reaches the position shown in Fig. 2. This it will do regardless of any further movement of the shaft 31, as the slot in the link 34 will travel freely over the pin 33. When it is desired to move the valve again,

Vso as to cause another fiow, it can be done by simply rocking the shaft 31 sufficiently to pull the auxiliary or operating valve 27 `down onto its seat, whereupon the chamber 21 will fill and the valve 12 be forced down regardless of any further movement of shaft 31. It is therefore impossible to hold the main valve 12 open continuously by any operation of the lever 31, because as soon as the starting-valve 27 is operated the operation of the main valve 12 is caused by the fluid-pressure and is not at all dependent upon nor controlled by the handle, but is permitted (regardless of the handle) by the lost motion provided for by the slot in the link 34 and the pin 33, which passes through said slot. Nevertheless, if circumstances require, as where there is insufficient waterpressure to operate the main valve, said main valve may be opened by means of the handle, which through the auxiliary or starting valve has a positive connection therewith notwithstanding the lost motion in said connection.

It is perfectly obvious that many other forms of construction may be employed in providing for this lost motion between the operating-handle and the auxiliary or starting valve, and I desire to be understood as claiming all such as being within the scope of my invention, which is not confined to the mechanical construction, but consists, broadly, in the application of a lost-motion attachment to the movement of the auxiliary or starting valve, whereby when the starting is effectuated the main movement of the valve may continue independently of the handle.

. movement, a fiuid-chamberabove said pistonvalve, an inletopening for admitting fluid into said chamber, an outlet-openngfor discharging the uid from said chamber, an auX- iliary or starting valve to said opening, a handle extending to the outside for operating said starting-valve, and connections embodying lost motion connecting said handle and said starting-valve whereby when said startingvalve is operated the main valve may operate regardless of said handle.

2. The combination of a piston-valve adapted to shut off the fluid flow at each endvof its movement, a fluid-chamber above said pistonvalve, an inletopening for admitting fiuid into said chamber, an outlet-opening for discharging the fluid from the chamber, an auxiliary or starting valve to said opening, a' rockshaft for operating said starting-valve provided with an arm, and a slotted link connecting the said arm and the said stem of the starting-valve.

3. The combination of a piston-valve adapted to shut off the fiow of fluid at each end of its movement,l a fluid-chamber above'said piston-valve, an inlet-opening for admitting fiuid into said chamber, an outlet-opening for dischargingthe fluid from said chamber, an auxiliary or starting valve the stem whereof is mounted in the longitudinal perforation in the main or piston valve and which is provided with stops permitting a limited movement only in respect to said .main valve, a handle extending to the outside, and a connection embodying lost motion connecting said handle and said starting-valve, whereby both said starting-valve and said main valve may be operated by said handle and yet when said starting-valve is operated the main valve may operate regardless of said handle. 4. The combination of a main valve, a valveseat, a fluid-chamber above said main valve, an inlet-opening for admitting fluid into said chamber, an outlet-opening for discharging fluid from said chamber, an auxiliary or starting valve the stem-whereof is mounted in a longitudinal perforation in the main valve, a friction device for normally holding said stem in adjusted position in said perforation, a handle extending to the outside for operating a valve, and connections embodying lost'motion connecting said handle to said starting-valve. In witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 10th day of July, A. D. 1903.

JOSEPH lW..NEIHERY. [L. s] Witnesses:

CHESTER BRADFORD, J Aims A. WALSH.

IOO l IIO

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