US1164098A - Vacuum-valve. - Google Patents

Description

S. A. KINSEY, 1n. VACUUM VALVE. APPLICATION man MAR. 23. 1912.

Patented Dec. 14, 1915.

' WEED T AEN FFEQE.

SAMUEL A. KINSEY, JR, 0F PEORIA, ILLINOIS, ASSIGNOR TO KINSEY & MAI-ILER (70., OF PEORIA, ILLINOIS, A CORPORATION OF ILLINOIS.

VACUUIVLVALVE.

Specification of Letters Patent. Patented De 14 1915 Application filed March 23, 1912. Serial No. 685,673.

Illinois, have invented certain'new and useful Improvements in Vacuum-Valves; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in valves.

It pertains particularly to a vacuum valve or a valve adapted to operate automatically for permitting return of air to a vessel being placed under vacuum to prevent it from collapsing. if for any reason the process of removing the air is carried too far.

The invention has for its object to provide a device of this class in which the valve and valve-scat are set high up within the struc ture to carry them away from and protect them from strains such as would cause leak-- age. Valves, particularly those for use with air, leak much more easily than those designed for carrying fluids consequently more care is required to protect them.

It has been customary heretofore in con structing vacuum valves to place the movable part. and its seat inside of the threaded part which screws into the vessel-wall or other part that is to receive it. It is well known that a threaded part in the form of a shell is very easily distorted by the presence of grit or dirt or particles of metal such as portions of a thread or turnings. Now, when the seating parts of the valve lie within the shell and distortion takes place the utility of the valve is immediately destroyed.

An important object of my invention, therefore. is to provide a structure in which the movable part and its seat are placed Well up in the body of the device quite remote from the threaded part where there will be no danger of strains of the kind mentioned.

Another object is the provision of a vacuum valve comprising two parts wherein the movable valve-part, the valve-seat and the valve-stem are all carried in a part entirely separate from that which is directly secured in the vessel or member in which the valve.

is to be carried, so that the parts cannot possibly sustain any damage such as would result in making the fixture useless.

Another object is to provide a vacuum valveof a peculiar structure in which the air inlet openings are so arranged that foreign matter cannot get into the working parts and cause trouble in preventing the valve seating properly.

Another object is to construct a device of this type in which the valve, in case it becomes separated from the parts that hold it, cannot drop through into the machine or part which carries it.

The invention, besides the above, relates to certain novel structures and arrangement of parts in a vacuum valve and these will be brought out in the description and drawing and pointed out in the claims.

In order to make my invention clearly understood 1 have, provided the accompanying drawing, in which:

Figure 1 is an elevation of my improved valve. Fig. 2 is a plan of a portion of the valve showing part section, taken on line :0 m, Fig. 1. Fig. is a vertical section of the valve on line'Y Y, Fig. 2. Fig. i is a sectional elevation of a portion of the valve on line Z Z, Fig. 2.

Before entering upona detailed description of the device, I shall again speak of the structure as ordinarily used in vacuum valves in order to better bring out the advantage of mine. As was stated at the outset, the valve and valve-seat have been located in or near the threaded member which screws into the machine or part which is to carry the valve. Now, even though the metal in which the valve seat is formed may be quite heavy, a particle of dirt or metal, or other foreign matter, however small, it caught in the threaded portions results in springing the seat and rendering the valve leaky. Also in constructing a device of this kind, having an opening or openings at the top, foreign matter can readily drop into it and in lying upon the valve seat would. perhaps, prop the valve open or get into the machine on which the device is-mounted. Again, in devices of this kind the structures are such that the valve, if it becomes detached from the parts that hold it, often drops into the machine or tank on which the device is mounted creating consideral'ile damage besides destroying the immediate utility er said device-in that an outflow" of" the liquid material contained in the machine or tank is prevented. v These several faults have necessitated, therefore,

a large outer and an inner small end, the latter being exterlorly threaded as at B and adapted to be screwed at 1ts sa d small or lnner end into the threaded openingof a vessel machine or fixture indicated at C which'is to carry it Said'she'll at'its'ou'ter or large end' is' internally threaded toreceive abody portion indicated at Dwhich carries the valve parts. is provided with any usual flange E to bear upon the upper surface of said part or she'll A, said flange being preferably provided with flat faces, as shown inFig; l', to

receive a wrench; The shellA is alsoprovided with flat faces, as indicated at F In said'Fig; l-,'and thereby the parts can be readily connected. Saidportion is" partially hollow, being open at its" upper end but closed at its lower end by a'diaphragm G' provided" with a" bore H Within it" is cast a substantially central part J provided with a bore K axially coincident withthe bore H of the diaphragm and serving asia guideforthe valve-stem lL-of the valve-M. The latter includesa body-portion-liaving a conical upper part N adapted to enter the conical valve-seat of the diaphragm- Gr described, as'clearly shown in Fig; 3." v

The part J I is connected with=the walls" of the cylinder by radiating vanes-O, clearly shown in Fig; 2, one of which is" shown insection in Fig. 3 and another in Fig; 4%.

Cast also with the vanes and the guide is an upper disk-like portion P overhanging the passages betweenthe vanes. This portion P prevents foreign matter froindroppmg into and through the device or from lodging on' the valve seat and interfering with the valve as might result if the passages were left open at thet'op. The central part J at its lower end is spacedabove the diaphragm G'sothat the air passages'between the vanes O can communicate with the shell 'A through the said bore H.

The valve stem extends some distance above the top of the ClBVlCB'flIlCl' surrounding it is a spring Q" one end resting in socket S, for example, in the part P, the other end bearing upward aga nstt'he head-of a screw R carried on the'top of thesaid stem. The

adjustment of the screw may provide for any desired tension upon the spring, ortlie spring may beof a certain desired strength s'o'as to'resistacertain pressuretliereoni In either case, the valve may be set to permit the passage of, air at any desired or given number of inches of vacuum.

While the foregoing describes thepre ferred structure, I-may make slight changes a' different" structure, or one such, for example, as is shown herein. It includes a shell A having This portion uremia. but") stair as wiiiiiraiiwithin; the meaningand intent of the invention. It is seen that one of my purposes is to provide a,

vacaa vaivein which theva'lv'e and'v'alve" scat are entirelyr'emovedfrom any chance of outside forces tending to destroy the proper seating of the said valve. Further it is seen that another purpose is to place the.

seat and the valve and valve stem in a'single inte ral part so that the valve cannot but seat perfectly.

Attention is d1rectedtothe fact that-the raised into place." ()r the flow and pressure of the liquid within the machine, or-other part, G, will forcethe valvebaclr'upon its seat and hold it there so that the danger-of flooding already mentioned herein is a'v'o'idedi This advantage "makes *th'evalve of particular value as will he readily seen.

In my structure there are buttwopart'sto the main structure 6.6. the part'sA and D, the latter having tlieintegral-par t J asthe guide for the valve stem, and thus: while yielding, all of theadvantages named the device is simple and can be produced at a low cost.

I ainap'prised of'a so'called safety plug used in connection with internal pressure apparatus but it is so constructed andis so used that it in" factrequires no 'se'at fbr itsl so called valve, which is' merely a; plunger acted on by pressuret'o puncture a soft-metal disk as an alarmto an attendant; the plunger merely acting to closethe outlet temporarily or until the pressure within itheap'p'aratus is relieved by said attendant where" upon-the soft metal 'disk is'replacechby another. This device'serves*an entirely different p'urp ose from valve; and" its saidtplunger is not required to seat pressureitight.

In a val've'to operate witlra va'cuum apparatus it is requiredthattheinovablepm ushall seat absolutely tight so as'tomaint'ain a perfect vacuum within the apparatus. That is'to say, it must maintainthe requiredvacuuin without change 1n order that said apparatus may properly perform it' s'= work; Fur-then more, the movable part or 'va'li'e'must be so arranged as to move inward to' let air pass should the vacuum become-too great:-

The valve must be protected from strains and changes in theform of its seat due fto heat orother causes and musttherefore he upwithin themain body away from all'" influ'ences' and must be protected from dirt or other foreign substance Thisadvantage isfoun'd in my dev'icean'd to my knowledge a vacuum valve having my structure and consequent advantages has not been employed.

Having thus described my invention, I claim:

1. A valve structure comprising a bodyportion having a recess opening through one end of the same, said body-portion including a wall at its other end having an opening constituting a valve-seat and including also a tubular part within the recess and spaced from the walls of the same, the bore of said part being axially coincident with the said opening, and spaced at its end therefrom, a disk-like portion at the other end of the part, the plane of which lies substantially perpendicular to the bore of said part, and spaced from and overhanging the said open end of the body-portion, and a valve normally closing the opening in the wall and including a stem extending through said opening and lying Within the said tubular part.

2. A valve structure comprising a body portion open at one end and including a wall at the other end having an opening constituting a valve-seat and including also a tubular part Whose bore is axially coincident with the said opening, said part being spaced from said wall and having a disk-like portion at its other end lying perpendicular to the bore of said part and spaced from and overhanging the said open end of the body portion, and a series of vanes connecting the tubular part with the shell, there being spaces between said vanes communicating with the opening of the said wall and with the space between the described disk-like portion and the body portion, and a valve normally closing the opening in the wall and including a stem extending through said opening and lying within the said tubular portion, the diameter of said stem being less than that of said opening, in combination with a shell attached to the body portion at that end having the valve.

In testimony whereof I aflix my signature, in presence of two witnesses.

SAMUEL A. KIN SEY, JR. Witnesses:

JOHN B. HAMMATT, L. M. THURLOW.

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

Washington, D. C.

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