US1055781A - Valve. - Google Patents

Description

N. B. MITCHELL a JW. TAGGART, SR.

VALVE= APYLIGA'MON FILED 001223, 19u.

1,055,781 Patented Mar. 11, 19131 V/TNESSES:

UNITED s'rafras raTENT OFFICE.

NELSNI. MITCHELL ,AND JOHN W. T-AGGART, SR., VOF INDIANAPOLIS, INDIANA, ASSIGNORS F ONE-FOURTH TO ULRICH G. BEDELMANN, 0F INDIANAPOLIS,

INDIANA.

VALVE.

spccilication of Letters Patent.

Application tiled October 23, 1911. Serial No. 656,222.

have invented a new `and, useful Valve, of

'. constriicted without and combinations and arrangements of par as hereinafter particularly described an which the following is a specification, reference Vbeing had to the accompanying drawand to the letters and lig'ums of reference marked `thereon.

Thisinvention relates to valves of the type that is'adapted for coptrollingtheadmission and discharge f steam or air in the oprationY of engines. or other machinery, suchashoistsv` or lifting apparat-us, the invention havingL referencemore particularly to avalv'evthat. isv soconstfructed as to be adaptedfvor operation either by hand or automatically by means` of mechanism.

The `'object of the invention primarily is to provide an improved valve that may be simply and cheaply produced and also be Vreliable', durable and economical in use; a

further object being .to provide a vvalve of theabov'e' mentioned character. that may' be y the iiseo packing-rings or springs and therefore not liable to derangement-'1in operationsf Wtli the above mentioned and minor objects in viewgthe invention consists in the rotary valve and valve chest' substantiallyas described inour application for Letters Ptent for' switch operating mechanism'. tiled May 31,1911, Serial No. 630,302, the invention havingA certain novel features of construction, and consist-ingfurther in the parts claimed.

Referring'; tothe drawings, Figure 1 is a top plan vof the improved valve; vertical section on the pla'ne of thc line A A in 1;;Fig.,.3,la hori'lontal section on the 'plane of thegline' B in Fig. 2; Fig. 4, a

plan of the bottom of the valve chest: Fig. 5.

a perspectiveyiew' of the improved' vulve; Fig. 6, a. fragmentary section similar to Fig,

. 3 but withfthe'valve in a different position;

Fig. 7, asectiion similar to Fig. ti but with the valve in still. another position; and Fig. 8, a 'fragmentary section of the valve chest on the line C C in Fig. 2.

Similar reference characters in the differ- Fig. 2, a

ments or"fe-.itures of constructionhercin referred to. l v

In construction a chest bottom 1 is provided which -is circular in plan and in the the'outer side of which is a shoulder-3, thereniaining middle portion of the bottom being flat and constituting a valve seat 4 havport openings 6 and 7 are formed in the 'tom and are arranged at opposite sides of therefrom.. The bottom has also an exhaust port openlngr 8 extending therethrough from the valveseat between the openings 6 and 7.

elbow 10 is screwed into the portop'ening 6 and an elbow 11 is screwed into the port with other apparatus. Av dome shaped valve chest 12 is provided which has a iange'l on its lower portion that is seated upon the bottom 1, the under side of the chest having an annular projecfion"14 fitting closely against the-joint shoulder 3 and seated on the joint face 2 so as to torni :i steam tight joint without the use of packing. A suitable number of bolts 15 are placed in the holes 9 and are suitably secured to the bottom 1 and rigidly secure thc chest to its bottom. The inner side of tliechest has a icylindrical guido wall 1G corresponding in diameter to the diameter of the guide shoulder 5 and continuing therefrom upwardly a suitable distance within the chest. The chest has a boss 17 on its side having an aperture in which a supply pipe 18 is screwed. The upper portion of the chest has a packing box 19 thereon in which is :i gland 20 retained by a packing-nut 21. l

A cylindrical valve 29, is provided that has a. flat valve face 23 and is seated movably on the valve. scat 4 and in Contact with the guide shoulder 5 und also in Contact with the guide wall 16, the back of the valve proper having an operating stem 24 secured thereto, the stem extending through Patented Mar. 11 ,1913.-A

ent'figures ofthe drawings indicate lilre cleupper side has a depressed joint Seat 2 atA the center of the valve seat equi-distant -ing a cylindrical guide shoulder 5 extend--l lng about it. Two screwsthreaded delivery.

86 bottom of the valve seat, the openings-extending from the valve seat through the bot- The outer portion of the bottom has a siiit A v. able number of bolt holes 9 therein. A plpe opening v7` so that pipes 'maj/ be lconnected thereto'and connected with a cylinder or` ioo l the packing box and the gland and the packl The rotary movement of the valve as being nutl The periphery of the valve l twcenthe extreme positlons shown 1n Figs.

forms a journal for rotativcly guiding the valve, andthe shoulder 5 and guide wall 1G together constitute a journal bearing for guiding the valve. The stem 2t constitutes also a journal for guiding the valve, especially incase the valve is so arranged for use that the stem is horizontal. The end portion of the stem vhas a tapering portion 26 on which is fitted an arm or operatingr handle 27, there being a washer 28 placed over-the end portion and against the arm, a retaining nut 29 being screwed onto the end portion of thestem against the washer for securely holding the arm on the stem, and when the nut is slackened it is evident that the arm may be readjusted relative to the stem, the arm having a hole 30 therein so that an operating device may be connected thereto for automatically operating the valve if desired. The valve 22 has a central cavity 31 extending vinward from the face 23 and two exhaust. channels B2 and 33 extend from the cavity at 'obtuse angles so as to .form communication between the opening 8 and the openings 6 and 7 during operation of the valve. The channels as will be seen extend from the axis of the valve to a plane beyond one side of the axis so that full exhaust communication is had with only one of the openings 6 vor 7' at a time, butpermitting restricted exhaust from both openings 6 and 7 at the same time during operation of the valve. The valve has two portsl 34 and 35 that extend therethrough and are so placed that they are in a plane' beyond the opposite sidecf the axis ofthe valve from the plane to which the channels extend, and are placed the required distance away'from the axis so as io be adapted to register with the opening- 0 or 7 or when the valve is in a certain position permit fluid to pass into both openings G and 7 vto a `limited extent, but full passage may be permitted into only one or the other 'of the openings 6 or 7 at one time. The chest has a guide shoulder 36 formed therein against which the rear edge portion of` the valve 22 is guided in case there is no fluid ressure in the valve chest the fluid l pressure in operation holdingr the valve to its seat. v

' In practical use the valve is moved to the posiilon shown in Fig` 3 for admitting the fluid (or liquid if used) from the valve chest. to the port opening 7 through the port 35 and permitting exhaust to talrc place from thc opening G through the. channel 3Q to the opening-S. The valve is placed in the position shown in Fig. G for permitting the lluid to pass from the valve chest into the opening 6 through the port 34 and permit exhaust to take place from the opening 'I through the channel 33 to the opening 8.

3 and 6 is relatively small so that there is but little friction and wear occurring. With the valve in an intermediate position it will he apparent that there is both inlet and exhaust communication with both of the openings 6 and 7 which in some cases is desirable in the operation'of pneumatic hoists, for controlling the descent of the load on the piston of the hoisting cylinder. When the valve is placed in the position shown in Fig. 7 it will be seen that fluid 'pressure maybe retained by the valve in the pipes.or ducts connected with both the openings 6 and 7,' since exhaust is prevented, and in this position there can be no passage of the Huid from the chest into either one of the openings 6 and 7.

Having thus described the invention, what is claimed as new is- 1. In a valve, the combination'of a cylindrical valve element having a centrallyvarranged stem on one side thereof and a centrally arranged cavity in the opposite side thereof, the element having two channels extending at obtuse angles one to the other to a plane on one side of the axis of the stern` the. element havingalso two ports extending therethrough in a Vplane on the opposite vside of the axis, with a chest bottom rotatively supporting the said element and having three port openings arranged in the plane of said axis to be closed or opened by said YYelement, said element being adapted to slightly open all of said three port openings at one andthe same time, and aehest having an opening through its Wall secured to said bottom. f

2. 'In a valve, the combination of a chest bottom having a valve -seat thereonand a guide shoulder ext-ending about the seat, said bottom having two delivery openings therein and also an exhaustI port opening between the delivery openings at the center of said seat, said bottom having a joint seat beyond said shoulder, two conduits connect-- ed with the two delivery openings'ispectively, .a valve chest secured to said bottom and having an annular projection seated on said Ijoint seat and having a packing box thereon, said chest having a guide Wall therein, one side of 'said chest having a boss provided with an aperture therethrough, a supply pipe connected to said boss, a valve element having a ll'at face rotatably seated on said valve seat and iny contact with said guide shoulder and also in contact with said guide Wall, said element having a central cavity in its'face and two channels extending from the cavity to a planeJ on one side of the center to form communication between said exhaust port and` either one or both of said delivery openings, said element having also two ports extending therethrough 'm a plane` on the oppnsite side of fn tesfxsmny wmwwi affix om" i-3gzm-- said center for opening cmnmunimtim'l, hw tures: in prvsenf-Q n? tween said chest and either one m hush 0f )JlS-z said delivery openings, n .stem www1 tu JHC W 5h.: a' said element and extending through, snil Wtnvsws:

packing box, and an operating :um zuljmt i E. T. Smvm? ably secured t0 said stem. J. H Hummm..

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