US 685930 A
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Patented Nov.. 5, IBM. .1. w. NETHEBY.
(Application filed May 31, 1901.)
UNITED STATES PATENT @EEICE.
JO EPH w. NETI-IERY, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE NETHERY HYDRAULIC VALVE COMPA Y, OF INDIANAPOLIS, INDI- ANA; NEW YOEI N. Y., AND JERSEY CITY, NEW JERSEY, A OORPO:
RATION OF NEW JERSEY.
SPECIFICATION forming part of Letters Patent- No. 685,930, dated November 5, 1901.
' Application filed May 31,1901. Serial No. 62,595. No modeLl To all whom it mag concern:
Be it known that I, JosEPI-i W. NETHERY, a citizenof the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Valves, of which the following is a specification.
My present invention relates to that class or variety of valves wherein the main valve Opens automatically upon the opening of a small auxiliary valve and closes automatically in a certain period after the closing of said auxiliary valve and wherein the small auxiliary valve is closed by the opening of the main valve, the valve thus being selfcontrolling in its operation after the auxiliary valve is once opened.
Said invention consists in an improved means whereby the abovestated results are accomplished.
Referring to the accompanying drawings, which are made a part hereof and on Whichsimilar reference characters indicate similar parts, Figure 1 is a side elevation of a valve of the kind mentioned with fragments of the inlet and outlet pipes thereto; Fig. 2, a central vertical sectional view of the same as seen when looking upwardly from the dotted line 2 2 in Figs. 3 and 4; and Figs. 3 and 4 horizontal sectional views as seen when looking downwardly from the dotted lines 3 3 and 4 4, respectively, in Figs. 1 and 2.
In the valve of my present invention the fluid enters the main chamber in the valvebody 10 through the ingress-pipe 11 and is discharged through the egress-pipe l2. ingress-pipe 11 is shown as connected to the side of the valve-body instead of, as is usual, to its end, while the egress-pipe 12 is at the end in the place usually occupied by the ingresspipe. The main chamber within the body 10 is cylindrical in form for the greater portion of its length, as shown, but at its lower end is constricted and terminates in the valve-seat 13, upon which the main valve 14 rests when the valve is closed, as shown in Fig. 2. The valve-stem l5 continues up to a point in the chamber above the ingress-opening and has a piston-head 16 thereon which The is substantially the full of said cylindrical chamber, but fits somewhat loosely therein, for the purpose which will be prosfrom just above the valve-seat up a distance at least equal to the travel of the valve in operation. the chamber between these wings taper out- Ward gradually until'the full size of the chamber is reached, so that the efiective opening for the flow of fluid as the main valve is opened in operation graduallyenlarges until the largest size is reached instead of opening suddenly to its full capacity. The upper end of the cylinder is closed by means of a suitable head 18, which is shown as held in place by the flanged coupling 19. In the under side of the head 18 is the valve-seat for the small auxiliary valve 20, whose stem 21 extends up through said head to the outside, where it terminates in a push-button 22. A stuffingbox may or may not be provided in the knob 23; but in my present construction, for reasons which will be presently given, this is in most cases unnecessary.
Extending from the auxiliary-valve seat As will be observed, the sides of.
around to below the main-valve seat is the by-pass 24. As best shown in Figs. 3 and 4,
this b ass is of lar er cross-sectional area than the opening which the auxiliary valve 20 is designed to close, and consequently when the valve 20 is opened the fluid which thereupon passes out of the main chamber flows easily and under no pressure as soon as it reaches said by-pass, and therefore a stuifingbox for the valve-stem 21 is unnecessary, as the fluid has no tendency to press out of the inclosure up around said stem.
In operation my improved valve works in the following manner: The operator presses upon the button 22, forcing the valve 20 off its seat. 'The fluid in the upper portion of the main chamber, above the piston-head 16, being thereupon released from confinement, the pressure coming in from the ingress-pipe 11, acting on the under side of said piston head 16, (which is of greater area than the upper side of the main valve 14,) will raise said piston and said main valve, the fluid above the piston-head flowing out into the by-pass 20, and thence discharging into the main egress-opening leading from the main valve, as will be readily understood. As the piston-head rises it soon comes in contact with and pushes up the auxiliaryvalve 20, which is thus presently seated. As before stated, the piston -head 16 fits somewhat loosely in the cylindrical portion of the main chamber, so that a small quantity of the fluid under the pressure which exists will find its way to above said piston-head, so that presently there comes to be an equal pressure upon both sides of said head. Thereupon the main-valve structure, including the pistonhead, begins to descend both by reason of gravity and because of the pressure on the upper side of the main valve 14. This descent, however, is gradual, as it can take place no faster than is permitted by the slow passage of fluid to above the piston-head through the small opening provided.
The piston-head may come directly against to provide an adj ustable strike 25, which may be in the form of a screw inserted in a screw threaded perforation which extends down through the piston-head l6 and into the valve 15, as shown in Fig. 2, and which is thus adjustable. By adjusting this strike, as will be readily seen, I am able to close the auxiliary valve 20 at any predetermined point in the ascent of the main-valve structure.
One noticeable advantage incident to the construction employed in the valve embodying my present invention is that no packing of anykind is necessary at any point. Neither arethere any springs or small and intricate parts to get out of order. The valve structures are wholly of metal and are of a solid and substantial construction, are of great simplicity, and therefore inexpensive, although very durable and elficient.
Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-- '1. A valve comprising a cylindrical body the lower end of which converges to a valveseat of smaller diameter, and which is provided with a head containing a valve-seat for a small auxiliary valve, a valve structure comprising a valve-stem having the main valve upon one end thereof and of a larger diameter than said stem, and a piston-head of larger diameter than said main valve adapted to operate within the cylindrical chamber upon the other end, an ingress-opening leading to within said cylindrical chamber below the piston-head and above the main valve, an egress opening leading off from below the main valve, a by-pass leading from the small auxiliary-valve seat to and discharging into said egress-opening, and an auxiliary valve adapted to be pushed away from its seat by means of its stem from the outside and to be engaged and pushed toward and against its seat from the inside by the mainvalve structure as it rises, substantially as set forth.
2. The combination, in a valve, of the body 10 having an ingress-opening at one side and an egress-opening at one end leading to and from a substantially cylindrical chamber within said body, said chamber however converging at one end toward the main-valve seat and provided withguide-wings extending above said seat for guiding the main valve in its movement, said main valve having a stem which extends to a point above the ingress-opening where a piston-head of substantially the diameter of the main cham ber is provided, a by-pass leading from below the main valve up around the same into the head of the cylinder and terminating in a valve-seat,and a small auxiliary valve mounted in said head and adapted when closed-to rest against said valve-seat, substantially as set forth. the auxiliary valve, if desired; but I prefer 3. The combination of a valve-body containing a single large cylindrical chamber pro vided with a main-valve seat at one end and La small valve-seat at the other end, a combined main-valve-and-piston structure presenting differential pressure areas to the fluid situated within said chamber, the piston being arranged on one side of the fluidjinlet and the valve on the other side, a by- 1 pass leading from the small valve-seat around 'to below the main-valve seat, and astarting- Jvalve at said small valve-seat, adapted to be closed by contact with the main valve-andpiston structure as it opens.
4;. The combination, in an automatic valve, of the valve-body comprising a cylindrical Ichamber with a small valve-seat at one end and a main-valve seat at the other end and a fluid-inlet between them and a fluid-outlet below said main-valve seat, a combined valveand piston structure mounted therein the piston above and the valve below the fluidinlet, the piston being formed to permit the passage of fluid from one side to the other JOSEPH W. NETHERY.
CHESTER BRADFORD, L. II. OoLvIN.