US1111439A - Engineer's valve. - Google Patents

Description

H. W. CHENEY. BNGINBBRS VALVE.

APPLICATION FILED DEG..24, 1913.

Patented Sept. 22, 1914.

HERBERT W. CHENEY, or#MiLwAnKnnwrsooNsIN, AssIGNoR" To ALLIsfoHALMnRs MANUFACTURING conrANY,'foF MILWAUKEE, wisconsin, A CORPORATION or,I

i s A DELAWARE. w

" To all whomz'tlmay concern: 13e it known lthat I, HERBERT W..CHENE`Y, a citizentof .the UnitedStates, residingat Milwaukee,in the county of Milwaukee and f StateofWisconsin, haveinvented a certain new and usefullmprovementin Engineers Valves, of which `the followingis aspeciiicae tion. f

thei'cons'truction ofvengineers valves adapt- 'ed primarily forluse yincontrolling the air brakes of railroad 4cars-4` valveseats free .1f-rom `accumulation of dust and` .dirt so that the vvalvesv will at 'all times properly seat.` lThe nsual vsuction strainers for pr elimnari-l-y;` straining the `air admitted. to the valves, although vremoving the greater` part of: :the -ldust entraifrved by] the air, 4do not y sufliciently purifythe ainftop prevent accu? mulati'on of dust on `the lvalve seats. .l

wInfthe l deviceof 'thefjpresent"invention la secondarystrainer.is;.insrted di'rectly within the valve casing -andbadjacvent the ,inlet 40 valve, .thus insuring proper `purificationI ofv y the airbefore its passage through the valve.

l Beyondthisgprovision the present invention consistsjdinso forming?-thevalve 'seat thatv thisiseat wilL automatically; `tend to clean itself,`z:thereby insuring proper seating of thevalve;v

` A clear conception;zoflgan'embodiment of the` invention `may be .h ad by@ referring to `the drawingf-'accompanying and forming a ,50 .part of. this-specification, in. which like refin thevarious views; l

- -wFigurel isa transversegvertical section `through anv engineers valve lfof -theiv combined eren'ce:charactersdesignate the same parts .5 5 piston` and puppetifvalve type. Fig. 2 isa ,This invention relates to improvements in struction, -Cell I'liILfffOPemM and. inf which -the valve seats are' at all times kept free "from undesirable accumulations .ofy

puppet and pis-" 1 `ENGINEn Rs vALvn. 4

7 specificati@ of Lettersratennf l Patented SPtl2211914 Y. g, Y 1 vertical section through an englneers valve of'jthe combined piston` andy puppet valve type, the section beingtaken along the Iliner of Fig. 3, lookingin the `'direction of the arrows. Fig. 3 is atransversehorizontal section through anengineers valve. of

the combined ,piston and puppetl type, the i section .being taken alongthe Kline III-III of Fig. 1, looking in the direction of. thev arrows.y

TheV engineers valve casing consists ,esaL sentiallypf casing base 3an intermediate, casing portion 2, andacasing `cap 1, 'these l three :casing'eleinents beingzunited by means of-bolts4\ passing through the casing. ele- `ments and clampedin place `by `rneansof nuts 5. Thecasing cap 1 is provided with `a central bore through which the valve operating stem `6 passes. handle@ c`o acts with thefuppenfree endof the stern-6 and isv adaptedto oscillate this stem in the usual manner forlnormal opera-` tion. -The lower end of theoperating stem 6y 1is provided with a. 4projection which `fitsl f into acentral recess in theintermediate casing portion 2, fthefstem `G .being `forced .up-. wardly by ,means of a helical fspring' 21,

which coacts atfits `lowerendwith a portion ofthe base 3, :and withvits upper. end against thelowerendgofthe s tem'. The intermediate portion'fofthe valvestem is pro-` vided.v with .quick-pitch screw, 1 threads 8 which Vare housedV within-the v casing cap 1..

TheV exhaust. valve V415' isjjof the combined pisto11' and,puppet valve type and -controls the exhaust port leading yfrom .the casing cap 1, `'lhisf-valve15;has an upwardly eX-` tending valve actuating stem which proj ects intoltheinterior ofthe casingjcap 1. VThe valve 15 is normally held ragainst its seat `by means of `the airupressure and of a helical spiralv spring 20. The inlet valve 14 is of the `combined piston {and ,puppet valve vtype The valve operating and controlsthe inlet of air from'th'e-air inlet chamber 18, which is Aadj acenty the valve 14, to the `interiorof the `ca singcap 1.9 The valve 14 is Y formed'with al .seating bead. 22 which is adaptedtocoactfwith thefvalve seat 23 which is preferably formed of leather or similar ,inaterial.- `The valve. 14 is norzf lmally heldjagainst .its seat byvmeajnsoof` a helical spirahspring `19,1-a`nld has an upwardly extending valve guideV 24', Ywhichlex-` tends intothe interior of thelcasing cap"` 1 w The quick-pitchsc'rewthreaded portion of the valve stem G is provided with a vertical movable operating member or block 10 which' is guided vertically and prevented from ro# tating relative to the casing 1 by means of a stationary guide stem 11. vThe upper end of the block 10 carries a suitable oil pan 9' for keeping the working parts properly lu-.j

bricated. The projection 13 extends laterally from*4 the block 10 and is adapted to engage the lower surface of a nut 25 whichis fixed to the Vupperendof the stem ofthe valve 15, upon vertical movement of thev The strainer17 is inserted' within this com-i municating lpassage and serves to prevent undesirable particles from passing into the valve chamber 18. The strainer 17 preferablyy consists` of a cylindrical sieve-or screen having vits interior filled with suitable straining material suchf'as hair. V The port'26 passes through the casing base 3 and intermediateI portion 2 and normally establishes communication between the interiorof the casing cap 1 andthe brake cylinder.`

'During normal operation ofthe device, the'valve actuating yhandle 7 i may be 'oscillated, thereby causing the valve stem 6 to oscillate and tomove the block 10 vertically Within the' casing 1 by virtue of th'egquiclf'- pitch screw threads 8. As indicated in the drawing, the block 10 is in substantially mid-position so that movement thereofI an'-`u`-pward vertical direction would even.-4 tually cause the projection 13 to engage'the nutl 25 on the steinofthe valve 15 andfto Y raise the valve l5 away from its valve seat.

During such opening movement of the valve 15'; the spring 2O is compressed and colmmunication between the interior-of thevcasingland atmosphere, isestablished through the exhaust port 28. Movement of thelblock 10 in adownward vertical direction4 from the position-shown, eventually fcau'ses the lug 12 'to come lin contact withthe upper end Vof the valve guide 24 and to move the valve 14 away from its seat 23, thereby establishing communication between the valve chamber 18 and the interior of the casing cap 1. l f As the passage 16 is normally in com-v munication with atmosphere through the usual suction strainer, and since these usual suction strainers, are intended primarilyr to remove only large; particles of dust and dirt whifchare entraine/d by the air, it is found Vin'practce that considerable undesirable foreign matter enters the passage 16. f Such admission lof foreigny matter to the valve chambers of the old rotary and slide valve types'of -engineers valves was not especially objectionable, `due to the `self-cleaning action 'of these valves in sliding over theirz-seats.

fiththejiuse' the piston and 'puppet' valve types of valves, it has,.- however been found that these particles ofioreign matterwhich varefadmittedftothe valve chamberfeventually accumulate: upon the` val-ve'seats and prevent securing of air tightfclos'ures. order to Veliminate this undesirable condi# tion, the supplementarystrainer 17 is placed directly within `thefvalve casing adjacent* the valve and between the passage land4 the valfve chamber([18.) This* strainer 1'? which may be readily made toA vremove .the

greater portion ofthe impurities entrained into the vpassage v16, `and which: increases thecost ofthe productionof `the 4valves but a*V I very}sl1ght amount, "is removably inserted-4` in a cored passage 'connecting the passage I 16 in the base?) and thev chamber 18 inthe intermediate portionl `2.5`l The portion of the passage 16 adjacentthelowerfend{orgs-pv the strainer '17 vis f; "laterally broadened soI as Ato pei-'mit entrance of the 'airgto the? i strainer aroundfl the jent'ire lowerv vpinition thereof. The-fstrainerfl maybe readily removed by-aJ separation of ,the :base and l,

intermediate portion 2 of theV casingl@V By forming the inlet valve `141 witlia circumferential bead 22*y which -isadaptedv4 to' 'ing the vvalve 111 will automatically'tendgto remove anyy foreignv 'matter whic'hmay have accumulated on the seating edge of the bead 22' and wilfl'tendgtb wipe 'such `foreignnfiatter into` the recess adjacentlthe' bead'.A 'In j this `way the valve bead 522 will beautomat-` ically kept free frorn-accumulation fwhiled s accumulation of solids 'uponV the fvalve`v seat 23 `willbe prevented bytheJgrav-ity-action upon particles tending toilodgethereon; It should lalso benoted that the provision :of a st1aine1f-j1'7ffor preventing thejadmissi'onv ofvdusty to 'thej va'lveg11;-1,` does "not only pro` .tect thisfvaplve but.protectsfthevalve 15 togetherv with' other'lworking'j'parts, 'as well.

' It` should be-nnderstoodthat .fitv 'fisvnot '11 desired to libe .liinitedi` to* f the Vexact r`details of construction shown-.-v` andVV ldescribefffl, `for. obvious .modifications .wi Hoccur Ito'fa personj skilled iirtheart` "Itis=f-cla1nie-dwgand vrdesired to secure 115 l l i 2. In an engineersvalvejya casing, a valve within said c'asingjl said; vallrvlenzcomprising a valve member and a. seat member; one of said "membersl bei-ng formedfor the* prevention rof accumulation f .of foreign :matter idolsf Vmeans'withinsaid casing for.preliminarily i puriiyingfthel'air admitted .tor rsaid valve-f thereon, means for operatingsaid valve, and

formed for the prevention of accumulation.

of foreign' matter thereon, means foreperatlng said valve. and a stralner Wlthln said casing and adapted to preliminar-ily Y purify air admitted to said valve.

5. In' an engineers valve, a casing, a

plurality of uppet valves Within said casing, means or operating said valves, and a strainer Within said casinor and adapted to preliminarily purify air `admitted to said casing past one of said Valves. l

6. In an eingineers valve, a casing, a plurality of puppet valves `Within said cas- 1ng,` means for operating said valves, and a removable strainer Within said casing andi adapted to preliminarily purify air-admitted to said casing past one of said Valves.`

In testimon whereof, tlie signature of the inventor Ais a Xed hereto 1n the presence of two Witnesses.

Witnesses: i i

` VV; `II.: LIEBER,

Gr. F. DE WEIN.

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

HERBERT W. CHENEY.

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