US1196996A - Valve. - Google Patents

Description

, PETA/55955.

W. A. VAN DEUSEN..

VA LVE. APPLICATION FILED AUGI3O. 1913.

1 ,1 96,996. Patented Sept. 5, 1916.

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UNITED STAS VALVE.

Application filed August 30, 1913.

To all whom it may concern Be it known that I, WILLIAM A. VAN DEUSEN, a citizen of the United States, residing at Cleveland, in the county of Guyahoga and State of Ohio, have inventeda certain new and useful Improvement 1n Valves, of which the following is a full, clear, and exact description, reference belng had to the accompanying drawings.

This invention relates generally to improvements in valve construction, and particularly to float valves such as are used in connection with flushing tanks for auto matically cutting off the supply of liquid to such tanks when the same has reached a predetermined level.

It has for its objects to provide a valve of this character which is highly efiicient; which is compact; and which can be readily applied to or removed from the tank without the use of tools, such a feature being very desirable because of the restricted space within which these valves are ordinarily used and which makes it inconvenient to employ a wrench Or other tool-for the aforesaid purpose.

A further object is to provide a valve of the said character which can be easily and quickly disassembled for thepurpose of inspecting or replacing the parts which are subjected to greatest wear; and a still further and very important object of my invention is to construct. such a valve ina manner that will obviate the usual whistling 0r hissing sound incident to the operation of valves of this nature.

While I have referred particularly to float valves, in the foregoing statements, I do not confine all the features of my invention to this particular type of valve, since the essential elements can be advantageously employed in connection with other forms of valves, and while I have selected a floatv valve as illustrative of my invention in the accompanying drawings, I limit myself to such construction only as is required by the terms of the annexed claims.

In the drawing, Figure 1 represents a side elevation of my float valve as applied to a flushing tank, a portion of such tank being shown in vertical section; Fig. 2 is a central, vertical section of my valve on a somewhat larger scale than the preceding figure and showing the valve open; Fig. 3 is an elevation of the upper end of the valve as Specification of Letters Patent.

Patented Sept. 5, 1916. Serial No. 787,409.

viewed from the left of Fig. 2; and Fig. 4 is a horizontal section on line 4-4 of Fig. 2.

Referring to the drawing by the use of reference numerals, 1 represents a flushing tank which is of the cast metal type, although it will be understood that my valve is equally well adapted for use with wooden,

porcelain, Or other kinds of tanks. Within the aperture 2 of the boss 3 which depends from the bottom of the tank 1, is clamped a fitting 4. The fitting 4 has an enlarged upper end 5 which is externally threaded and of greater diameter than the aperture 2. A washer 6 of rubber, leather or analogous material is interposed between the underneath face of the enlarged portion 5 and the adjacent surface of the tank and is firmly drawn thereagainst by a nut 7 which is threaded upon the lower end of the fitting 4:. To this end of the fitting is connected the upper end of a supply pipe 8, by means of a gland nut 9, a washer 10 being inserted between the ends of the pipe and the fitting to secure the joint against leakage. A tubular extension 11 rises the enlarged portion 5 of the fitting, and receives and properly locates a removable valve seat 12 which has a lateral flange 13,

from the center of and between this flange and the upper surwith the flange 18 extending laterally from the lower end of the casing 15. The ring 16 screws upon the enlarged portion 5 of the fitting 4t and forms therewith a union of ordinary form, the ring being provided with projections 19 for conveniently operating it by hand. With the leverage provided by the projections 19 it is an easy matter to secure a tight joint between the casing 15 and the fitting 1;;but should leakage occur at this joint the liquid will only escape into the tank and cause no trouble.

The casing 15 is provided with an upper and a lower wall 20 and 21, respectively, and an intermediate wall 22. Each of the walls is provided with a central, circular aperture,

and allofthese' apertures are of the same size and are arranged in axial alinement. The lower wall 21 is comparatively thick and the cylindrical wall of the aperture 21 which extends therethrough is interrupted by notches or ports 23. It will be seen from Fig. 2 that the notches 23 decrease in size from top to bottom, and that the valve seat 12, hereinbefore referred to, projects into the aperture 21. V

A valve plug 24 is guided within the apertures in the walls 20, 21 and 22, and its lower end is recessed for the reception of a washer or valve body 25 of suitable'material, which is held in place by a screw 26. The weight of the valve plug is materially lessened by cutting it away between the portions which are guided withinthe aforesaid apertures, as indicated at 27. At its upper end the valve plug is provided with a neck28 and a head 29.

I have previously mentioned that the construction of my valve causes it to operate noiselessly, avoiding the unpleasant whistling or hissing sound usual in valves of this type. This'is due to the shape and arrangement of the notches 23 and their'relation to the valve'seat 12. It seems that the whistling or hissing is caused, ordinarily,by the water, which is under pressure, escaping over the edge of the valve seat into'a chamber or cavity of considerably greater capacity than the supply pipe and wherein the pressure is comparatively low. Upon considering the operation of my device it will be seen that, as the valve plug rises from the seat and water escapes between said seat and the face of the valve plug, it passes into the lower, restricted ends of the notches 23, the capacity of such ports beingconsiderably less than that of the supply pipe. As the plug continues to rise the aggregate area of'the ports 23 gradually increases in proportion to the increase of the supply of liquid, and

this maintains, throughout the rise of'the plug, the proper balance between the pressure within the supply pipe and the pressure within the ports and prevents, at anytime during the operation of the valve, the aforesaid annoyance.

The plug is reciprocated by mechanism which will now be described. Pivoted to a lug 30 which rises from one side of the valve casing 15 is an arm 31, and this arm, while it comprises two parallel side plates, is preferably made of one piece of sheet metal, the side plates being connected'together at their lower edges by a strip of material shown at 32. The neck 28 of the valve plug occupies the space between the side plates of the arm 31, andthe upper and lower edges of the side plates engage the underneath surface of the head 29 and the upper end of the valve plug, respectively. The shape of the side plates is such as will arm 3l.

cause themto'constantly engage the head '29 and the upper surface of the valve plug regardless of the angular movements of the The end of the arm 31 remote from its pivot is connected by a link 33 to one end 34 of a bell crank or angle lever, such lever being journaled upon a pin 35 which is supported in the upper ends of a pair of horns-36 which extend upwardly from the valve casing and are curved toward that side of the valve casing opposite the lug 30. The opposite end 37 of the bell crank or angle lever has an aperture which extends therethrough at right angles to the axis of its pivot pin 35 and secured within this aperture, by a thumb screw 38, is the end of a float'rod 39, the other end of the rod being provided with the usualfloat 40. For

a purpose which will hereinafter be explained, I prefer to pivot the end of the arm 31 to the lug 30 by a cotter pin 41.

The tube 42, which has a closed end and a downwardly directed opening 43, is threaded into the side of the casing 15 and provides an outlet for the liquid, projecting its flow toward the bottom of the tank and eliminating the splashing which would occur if it were permitted to escape in a substantially horizontal stream. While I have shown my valve in the drawings as standing vertical, it t.

is obvious that the same could be brought in "through the side of a tank or across the top thereof, the'float 'rod39 being bent to'accommodate such position of the valve, and

in the'event of such an arrangement 1 substitute for the short tube 42 one of a length suffic ent to convey the water to within a short distance of the bottom of the tank; and

a hole 44 in the side of the casing, and communicating with the chamber which is formed between the walls 20 and 22, provides an escape for the water which accumulates 'therein'and thus prevents corrosion or the accumulation of sediment within the casing.

In Fig. 1, the parts are shown in the position they occupy whenthe tank is filled with water, while in Fig. 2 the float rod 39 is tilted downwardly by the fall of the float as a result of the withdrawal of the water from the tank, and the bell crank lever 3437 is swung upon its pivot to elevate the free end of the arm 31 through the link 33. Upon such operation the valve body is elevated and liquid is permitted to'flow from the supply pipe 8 and through thefitting'4, through the aperture 21 and through'the ports 23 into the valveca'sing from where it escapes through the tube 42 into the tank. As the water level within the tank rises the float is elevated and the bell crank lever 3437 is again rocked to depress the valve plug through the link 33 and the arm 31'. When the float reaches the limit of its movement, the lower. end 34 of the bell crank lever and the link 33, which, in effect, comprise a toggle joint, assume a position which is almost straight, so nearly straight, in fact, that the valve plug is very effectively held against its seat by a pressure which is considerably in excess of the pressure within the supply pipe,

notwithstanding the fact that a comparatively small float and short float rod are employed. 7 Should the valve seat 12 become worn, access to it may be easily gained for the purpose of replacement by the removal of the casing 15 from the fitting 4 through the unscrewing of the ring or union 16. The reinoval of the valve seat is a simple matter 15 since the freezing or sticking of the same to the portion 5 of the fitting is prevented, as previously stated, by the use of the fiber washer 14L. To remove the valve plug 27 from the casing for the purpose of replacing the washer in the event of its becoming worn, the cotter pin 41 is removed to free the arm 31 from the lug 30, when said arm.

may be slipped from about the neck 28 of the valve plug, and the valve plug with- 25 drawn upwardly from the casing.

Having thus described my invention, what I claim is In a device of the character set forth, the combination, with a supply fitting having a tubular projection, of a tubular valve seat into which the valve seat projects, the wall 1 of the bore being spaced from said seat, said wall having a plurality of notches which originate substantially at the junction of the casing and the flange and increase in width and depth toward and open into the aforesaid chamber, and a valve plug recip' rocally mounted in said bore and having its end adjacent the valve seat provided with a recess of greater diameter than the valve seat and substantially concentric therewith, and a valve body of compressible material within and coextensive of the recess.

In testimony whereof, I hereunto afiix my signature in the presence of two witnesses. WILLIAM A. VAN DEUSEN. Witnesses:

BRENNAN B. WEST, JOHN B. HULL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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