US702266A - Valve. - Google Patents

Description

- Patentd June 10,1902. E. WEBB.

VALVE.

(Application filed Dec. 1, 1899.)

(No Model.)

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EDlVARD WEBB, OF READING, MASSACHUSETTS.

VALVE.

SPECIFICATION forming part of Letters Patent N 0. 702,266, dated June 10, 1902. Application filed December 1, 1899. Serial No. 738,783. (No model.)

To aZZ whom it may concern:

Be it known that I, EDWARD WEBB, of Read ing, in the county of Middlesex and State of Massachusetts, have invented certain newa valve constructed in accordance with my Fig. 2 represents a sectional view; of the lower part of the valve with the wasteinvention.

outlet plugged.

The valve as herein described is particularly adapted for use in regulating water or other liquid pressure; but it is not confined.

thereto. V

1 designates the valve-casing, which is tra versed by a partition 2, having a central open-l ing surrounded by a horizontal valve-seat 3.

The space within the casing on the upper side of the partition constitutes the inlet-chamber and the space on the lower side constitutes the outlet-chamber, the direction of flow of the fiuid being indicated by arrows.

6 represents the valve, located in the outlet chamber 5 and adapted to close upwardly against the valve-seat 3. Said valve is provided with a prolongation or stem 7, extending upwardly through the inlet-chamber and terminating in a head 8, the under side of said head and its attachment-s presenting an area substantially equal to the area exposed on the upper side of the valve, so that the valve is substantially balanced against the fluidpressure in the inlet-chamber by means of said pressure. The casing is provided with a cylindrical opening 10, leading from the upper or inlet chamber 4-, which opening is closed by the head 8 of the valve-stem. Said head is packed within the opening by means of a cup-washer 11, of leather or other suit'- able material, which is secured to the upper side of the valve-stem head by means of a headed screw 12, the edges of the washer being turned inwardly toward the inlet-chamber, so that pressure in said chamber acting against the inner side of the washer causes said washer to cling closely to the Walls of the opening 10.

13 represents a spring case or cage attached to the top of the valve-casing l and inclosing a helical spring 14, the lower endof which abuts against the exposed head of the valvestem. The end of the spring-case is provided with a screw adjustment 15, which confines the outer end of the spring and regulates the tension of the latter. It will be observed that the spring 14c tends to open the valve 6 and is resisted by pressure which may exist in the outlet-chamber 5, said pressure acting upon the full area of the lower side of the valve. When said pressure in the outletchamber has attained a certain amount, determined by the set of the spring 14, the valve will close and prevent the further passage of fluid through the opening in the partition 2. As soon as the pressure in the outlet-chamber has been sufficiently diminished the valve will open again. Ohannels9 9 are provided in the base of the valve-stem, just above the valve, to allow the fluid from the inlet-chamber to reach the upper side of the valve, the webs between said channels extending to the walls of the valve-opening, so as to guide the valve in its movements.

The casing l is further provided with an opening on its lower side leading from the lower or outlet chamber 5, said opening being of a size to permit the insertion and withdrawal of the valve 6 and normally closed by a screw-cap or plug 16. Said plug is provided with a threaded aperture through which passes a screw-spindle 18, having a handwheel19 attached to its lower end. The upper end of the spindle is located within the outletchamber 5, immediately below the valve 6, and may support said valve when the latter is in open position and the spindle partly or wholly retracted. The spindle is disconnected from the valve, so as to permit movement of the latter independentlyof the move- .ments of the spindle; but the arrangement, as will be seen, is such that the spindle can be screwed upwardly to force the valve against its seat. By this arrangement a stopvalve construction is provided whereby the valve may be shut and the flow of fluid stopped at any desired time quite independently of the automatic pressure-regulating action of the device.

When the valve is closed and the pressure shut ofi, it is desirable to have provision for the escape or Waste of the liquid within the outlet-chamber. Said provision is herein made by boring a waste-outlet or vent 20 through the plug 16, which closes and forms the floor of the outlet-chamber, said wasteoutlet connecting the outlet-chamber 5 with the atmosphere or with a suitable receptacle and terminating at its upper end on the upper side of a raised boss 21, which surrounds the spindle 18 and constitutes a secondary valveseat. The upper end of the spindle 18 is provided with a head or enlargement 22, whose lower side is faced with a packing- Washer 23, so that when the spindle is fully retracted the washer 23 will abut against the boss 21 and close the waste-outlet 20. When the spindle is screwed inwardly to close the main valve 6, the waste-outlet is opened and the liquid in the outlet-chamber can escape therethrough.

The valve herein described and illustrated is of inexpensive and durable construction,

and the functions assigned to it are per formed with the minimum number of parts.

The valve 6 is shown in the drawings as closed against its seat as though acted on by a pressure in the outlet-chamber sufficient to overcome the tension of the spring 14.

In case it should be desired to use the device as a pressure-regulating and stop valve only the waste-outlet 20 may be closed, as shown in Fig. 2, which illustrates a small removable plug 24 screwed into the outer orifice of said waste-outlet, thereby preventing a flow of water from the outlet-chamber 5 through said waste-outlet.

I claim- 1. Adevice of the character specified, comprising inlet and outlet chambers, a partition separating said chambers and having a valveseat, a valve controlled to close against said seat upon the attainment of a predetermined pressure in'the outlet-chamber, a waste or vent outlet leading from the outlet-chamber, and a manually-operated spindle mounted for movement independently of the valve and adapted to close the valve against its seat when moved in one direction and having provisions for closing said waste-outlet when moved in an opposite direction.

2.' A device of the character specified, comprising inlet and outlet chambers, a partition separating said chambers and having a valveseat, a valve adapted to close toward the inlet-chamber against said seat, a spring forcing the valve yieldingly away from its seat, an externally-accessible screw-spindle movable independently of the valve and adapted to abut and force the valve to its seat against the tension of the spring, and ,a waste or vent outlet leading from the outlet-chamber and controlled by the movement of said spindle.

A device of the character specified, comprising inlet and outlet chambers, a partition separating said chambers and having a valveseat, a valve controlled to close against said seat upon the attainment of a predetermined pressure in the on tlet-chamber, a waste or vent outlet leading from the outlet-chamber and terminating in a valve-seat opposite the said valve, and a screw spindle passing through the wall of the outlet-chamber and movable independently of the valve, said spindle being adapted to abut the valve and.

move the same to its seat when screwed in one direction, and having a head or enlargement acting as a valve which closes against the said Waste-outlet valve seat when the spindle is moved in an opposite. direction.

In testimony whereof I have affixed my signature in presence of two witnesses.

EDWARD WEBB.

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