US1295638A - Automatic valve. - Google Patents

Description

G. A. TRIGGS.

AUTOMATIC VALVE.

APPLICATION FILED MAY20, 1918.

1,295,638., Patented Feb.25,1919.

7/1 /22 72655 Q I fiwnior WWW By W of the type operated b ononena. names, or CLARION, IOWA.

AUTOMATIC VALVE.

eoaeee.

Specification of Letters Patent.

Patented Feb. 25, rare.

Application filed May 20, 1918. Serial No. 235,664..

To all whom it may concern:

Be it known that I, GEORGE A. Tnroos, a citizen of-the United States, and resident of Clarion, in the county of Wright and State of Iowa, have invented a certain new and useful Automatic Valve, of which the following is a specification.

The object of my invention is to provide an automatic valve of simple, durable and inexpensive construction, adapted for use in Water systems.

A further object is to provide such a valve the variations in the relative pressures rom the tank and some other force.

Still a further object is to provide such a valve and operating mechanism, whereby the valve is moved with a quick movement from opened to closed position, or vice versa.

Still a further object is to provide such a valve and operating mechanism having adjustable parts, whereby the parts may be regulated so as to determine the relative pressure necessary to operate the valve in one direction or the other.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the'various parts of the device, whereby the objects contemplated are attained, as hereinafter'more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 shows a side elevation of the valve and operating mechanism, the movable diaphragm being shown in vertical cross section.

Fig. 2 shows a side elevation of the valv and parts connected therewith, and

Fig. 3 shows a side elevation of a slightly modified form of the equipment.

Before explaining in detail the construction of my valve, a brief explanation of the system in which it is used may conduce to a clearer understanding of the purposes and structure of my invention.

My valve may be used in a variety of ways; for instance in a pumping system where the valve is used to control the flow of city water from the source of supply to a pump. The pump operated by the flow of water is used to pump water from a cistern to a tank.

The valve includes a diaphragm actuated on one side by the pressure of city water or by a spring or other suitable device, and

on the other side is subject to pressure from the tank.

In the accompanying drawings I have used the reference numeral 10 to indicate generally the valve casing, which in the form of the device illustrated herein, should be water-tight. Communicating with the valve casing 10 is a supply pipe 11.

I Communicating with the valve casing 10, preferably at the lower portion thereof, are pipes 12 and 13, at the entrance to which are formed valve seats 14 and 15. Pivotally mounted at 16 between the valve seats 14 and 15. is a double valve 17, adapted in one position to close the entrance to the pipe 12, and in another position to close the entrance to the pipe 13, in coaction with the respective seats 14 and 15.

The upper surface of the valve 17 has a portion 18 concave and curved on the arc of a circle having its center at the center of the stub-shaft 19. On the stub-shaft 19 is mounted a lever 20, having portions extending downwardly from and upwardly from the stub-shaft. The lower part of the lever 20 carries a roller 21, which travels on and coacts with the surface 18 of the valve 17.

Mounted in the wall of the casing 10 by means of a water-tight joint 22, is a slide rod 23, having at its inner end a head or- L tween the head 28 and the head 30, at the upper end of the sleeve 27 is a coil spring 31 tending to force the head 28 and the rod 29 away from the pivot point of the sleeve 27.

Suitably supported outside the casing 10 is a diaphragm casing 32, in which is mounted a movable flexible diaphragm member 33, shown clearly in Fig. 1. The slide rod 23 is connected 'with the diaphragm member 33-, and may be connected with a rod 34 extending away from the diaphragm member 33 in the opposite direction from the slide rod 23. Screwed 1nto thediaphragm casing on the side thereof opposite the slide rod 33, is a sleeve 35 in which is mounted a coil spring 36, into which the rod 34 extends. The coil spring 36 abuts against a nut 37 adjacent to the diaphragm member 33 at one end, and against a shoulder 38 in the sleeve 35 at the other end, and yieldingly tends to hold the diaphragm member 33*against the interior surface of the wall of the diaphragm casing 32 farthest from the sleeve 35, for balancing pressure in the casing 10.

The sleeve 35 communicates with the interior of the diaphragm casing, and also with a tube 39 which leads to another tube or pipe 40. The pipe 40 is designed to be connected with a cistern or other source of supply, and also with a storage tank 41. The pipe 12 communicates with the pump 13, which pumps water from the cistern into the pipe 40. Leading from the ump 13 is a pipe 42 which takes away tie water that has been used by the pump.

The pipe 42 may connect with a pipe 43 communicating with the fixtures in a house. In case such structure is used, the pipe 13 is also connected with the pipe 43 and fur nishes a bypass, whereby water may pass from the valve casing 10 around the pump without going through the pump. The form of the invention just described is shown in Fig. 2.

In Fig. 3 I have shown a slightly modified form of the device, in which the pipe 13 is closed by a cap 44, and the pipe 42 is designed to extend to a sewer or other suitable point of discharge.

In the pipe 40 between the'pipe 39 and the tank 41, I preferably provide a valve 45.

It may be noted that by screwing the sleeve 35 farther into or out of the diaphragm casing 32, the tension of the spring 36 may be regulated as desired.

I will now describe the practical operation of my improved valve. In Fig. 1 the parts are shown in their positions assumed after the tank 41 has been filled and the valve has operated to close the opening to the pipe 12, thereby shutting off the flow of water through the pump and stopping the pump ing of water through the tank 41.

It'will readily be seen' that if the form of the device shown in Fig. 2 is employed, city water maybe drawn from the valve casing through the pipe 13 without in any way affecting the operation of the valve.

Whenever the pressure from the tank 41 becomes so low that the combined pressure from the tank 41 to the pipes 40 and 39 and. thesleeve 35 and the spring 36 is not sufiicient to overcome the pressure of the water in the casing 10 (this being the pressure in the instance under consideration, of the city water), then the pressure of the water in the casing 10 will force the head 24 and the slide rod 23 outwardly, thereby causing the diaphragm member 33 to move toward movement is steady, and does not affect the valve 17 until the lever 20 and the rod 29 are substantially in alined position and move slightly past alined position, whereupon the spring 31 will force the head 28 and the pin 26 and the upper end of the lever 20 quickly to the left, for thereby moving the valve 17 from its position shown in Fig. 1 to position for closing the pipe 13 and opening the pipe 12, with a sudden movement. The opening around the rod 23 is large enough to allow water from the casing 10 to enter the diaphragm casing.

lVhen this movement is completed, the water coming from the supply pipe 11 will pass through the pipe 12 to the pump whenever the pipe leading from the pump is opened.

Where the form of device shown in Fig. 2 is used, this would occur whenever water was drawn from the fixtures in a house or the like. I

\Vhere the device in Fig. 3 is used, the pumping operation would begin whenever the valve 51 in the pipe 42 is opened. The pumping would continue as long as the flow was permitted through the pipe 42, or until the pressure in the tank was suflicient to cause the valve 17 to close the pipe 12, in which case water drawn through the house fixtures would pass through the pipe 1.3 but I would not operate the pump till the use of the fixtures ceased. Thus with the form of the device shown in Fig. 2, no water is wasted, but the pump is operated whenever the pressure in the tank is down, and water is drawn through the ordinary house fixtures. In case it is desired to run the pump for an unusual time and no water is desired for use in the house, it is obvious, of course, that some water would have to be wasted.

After the tank has been filled to the point where the predetermined pressure has been reached, then the pressure in the tank, combined with the tension of the spring 34, will slowly move the rod 23 to the right until the lever 20 and the rod 29 pass center, whereupon the spring 31 will cause the lever 20 to act with a quick movement for moving the valve 17 to position for closing the opening into the pipe 12. By regulating the tension on the spring 34, the pressure from the tank necessary for operating the valve, will, of course, be varied.

It will be seen that various means, such as a spring, might be' employed for imposing pressure on the rod 23 against the pressure of the spring 36 and the pressure from the tank.

It will be-noted that the pin 26 has sufficient play in the opening 25 so that when the spring 31 operates toswing the lever 20, sufficient free movement of said lever is permitted with relation to the slide rod 23.

naeaeae The advantages of a device of this kind are largely seen from the foregoing descripaction of the pump is made positive and there is very little leakage of water without operating the pump.

The parts are of simple and inexpensive construction, and the valve is very durable.

Some changes may be made in the construction and arrangement of the various parts of the device without departingfrom the real intent and purposes of my invention,

and it is my intention to cover by my patent any modified forms of structure or use of mechanical equivalents which may be,

reasonably included within the scope of my claims.

I claim as my mvention:

1. In a device of the plass described, a

diaphragm easing, a flexible diaphragm member therein, means for subjecting one side of said diaphragm member to the pressure from a tank, a spring arranged to impose pressure on the same side of the diaphragm member, a slide-rod connected with the other side of the diaphragm member, means for imposing a predetermined pres sure on said slide rod, a valve, a lever op-.

eratively connected with said valve, and means for connecting said lever with said slide rod, whereby the movement of the slide rod imparts sudden opening and closing movement to the valve, said means comprising a head on said slide rod, having an opemng therein, a pin on said lever, ex-

tended through said opening and having considerable play in said opening, a member pivotally mounted, a second member operatively connected with said opening, and tele-' scopically mounted on said last described member, and a spring for forcing said last two described members apart.

2. In a device of the class described, a diaphragm device a valve casing, a slide rod extending through the wall of said valve valve with said slide rod, whereby comparatively slow movement of the slide rod imparts comparativelyquick opening or closing movement to the valve, said means ineluding a lever pivoted between its ends, having one end operatively connected with said slide rod topermit some play, and having its other end arranged to engage said curved face for operating said valve, and a spring device for imparting quick movement to said lever whenever the' lever is moved past a certain predetermined point by said rod.

3. In a device of the class described, a valve casing, a slide rod extending through the wall of said valve casing, an intake pipe for supplying Water tosaid valve casing, a discharge pipe, a, valve mounted to rock and arranged to close the opening into said discharge pipe in one of its positions, and

mined point, said valve having a surface curved on the arc of a circle having its center at the ivot point of said lever, and a rot'ary mem er on the other end of said lever for engaging said surface.

Des Moines, Iowa, April 29,1918.

enonen A. raises.

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