US1162199A - Metal-working blowpipe. - Google Patents

Description

M. E. WINANS & P. A. ROSE.

METAL WORKING BLOWPIPE.

APPLICATION F|LED OCT. l. |914.

Patented Nov.

l/vI/E/vroRs u. 6044;- MM

uu; AHORA/vs 49 `jury by tal section,

tion ina plane at right `angles to the plane ,25

vao

for the sake of hardness STATES VrENfr oEic.

MILTON E. WINANS AND PAUL A. `ROSE, or` NEWARK, NEW JERSEY, AssIGNoRs rro OXWELD ACETYLENE COMPANY, OF CHICAGO, ILLINOIS,

VIRGINIA.

-T0` all whom t may concern Be it known that we, MILTON E. WINANS and PAUL A. ROSE, both citizens of the United States, both residing at Newark, .in

the county of Essex and State of New'Jer- To this and other ends the invention consists vin the novel features of construction and lcombinations of elements hereinafter described. `Y

One form of the invention is illustrated in the accompanying drawing, in which-- Figure 1 is a plan view, partly in horizonand Fig. i2 is a longitudinal sec# of Fig.` 1. Fig. 3 is a sectionon line 3-3 of Fig. 2, and Fig. 4 is an end view froml line 4-4 of Fig. 2.A

The external cutting nozzle is made in two parts. `The lower part or outer nozzle member, 10,1in` the form `of` a short cylindrical shell tapered at its outer end, is made of' copper, which `possesses the necessary heat-resistant properties. The' upper part or inner nozzle member, 11,- threaded into Athe nozzle-head or casting 12 and having a hexagonal outer contour, is made of brass and durability, being far enough from the flame and the highlyheated metal against which the flame -is projected in use to be protected from inthe heat. The two parts are i dovel tailed together, as it were', thelowervend of the brass part 11 being internally rabbeted and the metal rim v(around the rabbet) beingy swaged in and overs the flaring .upper end of the copper tip jv10,-as shown-'' at 13. Through both .'parts'extends-a cen-Y tral tube 14 `which at its lower end terminates flush with the end of the'shelllO.' The inner surfaces'ofthe two nozzle members are flush with' eachother, as shown, and the outer diameter of the jet tube 14 is uniform. The annular passage 10a -thus provided is, at most, of non-increasing cross-section.

Hence there -ls 'noadecreasein the velocity Specification of Letters Patent.

A CORIORATION 0F WEST Patenten Nm?. 3o, ,1915.l

pplicaton filed October v1, 1914. Serial No. 864,424.

l of the combustible mixture'ilowing through `such passage and consequently no increase 1n possibility of back-firing. Longitudlnal grooves 15 are 'milled in the outside of the tube to provide a series of outer openings constituting in effect an `annular ori-v fice for the oxygen-acetylene' mixture.A At its upper end the tube 14, which, it may be stated, carries the high-pressure oxygen cutting jet, abuts tightly against a short neck f 16, integral `with the head-casting 12 and providing an annular chamber 17 at the inner end of the part 11. Around the upper end ofthe tube 14 is a flange 17a integral therewith and held between the inner end of the member 11v and the shoulder 17h. From the chamber 17 the oxygen-acetylene mixture is through apertures 17c in the flange 17a supplied to the 'passage or pas sages around fthe central oxygen-tube 14. The chamber 17 receives the oxygen-acety-` lene Vmixture 'through a'passage 1 8 inthe substantially Lsshaped head-casting, which xpassage opens into the longitudinal bore 19 containing a mixingtube 20. At the rear of the mixing tubeis an injector` nozzle 21 -controlled by a needle valve 22 at its rear end. The nozzle 21 is seated against a shoulder 23 formed in the bore 19 and is held in place by a screw-collaror nut 24.v At `its forward end then injector nozzle is formed with a nipple providing an annular space 25 communicating with a' lateral passage 26 in the lateral extension 27 of the head-casting 12. This lateral passage communicates with the longitudinal bore 28 in said extension, which` latter bore'. supplies acetylene from 'tube 34 to the'transverse passage 26. The

acetylene thus supplied to the annular space sor chamber 25 isentrained into the mixing tube by the oxygenissuing from the nozzle 21 and the mixed gases then iow through the passage 18 to the nozzle 10-11 and are.

A .burned at the orifice 15.4 The oxygen is sup- .,plied to theinjector nozzle v21 through a passage 31 in a lateral extension 32 of the head-casting 12,- and is conveyed to said passa'ge by a tube 33 fitted into the extension v32.

.The acetylene, supplied to the chamber 25- by the passage 26 and 28, is conveyed to the latter passage by a tube 34 fitted into the' extension 27. The bore.of the tube 14, and the annular space 1 0a surrounding the same,

- constitute independent passages for oxygen and a combustible mixture, respectively, and

' are'adapted to direct aheating'flame anda jet of oxygenyfupon -'the.jsanre spot on valve;v as 'for examplethose shown at-2'l` andv importan-tjfeatures. Theyaford regul 'tron of5both the'oxygen andthe acetyl A 22, 'far he'pre-Qheatingltiame by means ,of a

,ia hQllgh-ftlfe;fvalveicontrols directlyonly thel 'between lthe noz'zleand-the longitu'dinal;por-v 'tion of the head-castingjs'also an important `2'5 `feature, fortwo reasons.` irst, it masks the rear; portionjof the vheadfeasting from 're Y lected `heat-'to a l not Ii nconsigflerable extent and lthus ykeeps the preheating oxygen-acety lene mixture oo oler; and second, it is itselfl .heating flameis projected.

In rear .of -th I "three then` enter ,he front-casting 365 of the 40 Ihollow handle37lffTliis latter comprises `thefront casting .just mentioned, sleeve 'or'h ol llovv,'cylin`der 38 into-.which the front casting is fitted, and a rear casting 39 VVfitted intothe .l i cylinder". .Insidethe handle the tubes 34 45S extend intoconnetion with the ipassages 42,

acetylene is supplied,"ex` tends down into. a' i boss 44 on' the rear-handlecasting`39f`into` communication" w-ithfafv nipple 451 for coni I nection with; whose-leading from fthe' acetylene 'tankor generator; and .isjcontrolled yby agneedle valve-46; nThcjpassage, con# ljtrolled by aj needle valve 47 workingin4 alateral boss 48A on the rear handle-casting,

runs intothe passage 49 whichis itself con-'l` I lected by means of a nipple 50, .with a hose j' `leading from a supply of oxygen under pressure. At the forward end the passage 49,-

' opens into a tube 51 seated at its front end in the casting or y'handle-closure 36 and'com municatin'g through a passage 52 with the "..cutting-jet supply-tube 2,9. The How of oxygen to the tube 29and thence tothe-tube 14 is governed by -a spring-pressed Valve 53 working in' the member'36.A It will be ob- The provisin of; an jinjector'- nozzle? and fof'a `liglit'er,-'sp-rin'g. Experiencewthth'e 70 'blowplpe illustrated has. shown that less ecessary to .re-ad- The three val e.,thumb piecev I, sthe :highf pressure oxygen tube 29 iS.l .bent upwardlyh into -proXimity-tojthe vtubes 33, 34, andjthe oxygen..y to the cutting jet, isl retracted vcrumed at 55 on a bar 56 extending rearwardly from" the front handle-head 36. Out- -Iside o f the handle the bell-crank is provided with g a 'thumb-button 57 by 'rocked to retract the va1ve53. The bellcrank and its'thumb-piece 57 move in the :central plane of'the blowpipe, sc .that in deo fthefpassagejo This is an important feaaf closeafth'e va'lve., thereby permitting the use manual efortfis required to open the valve closed .by springfpressure only Vand which k.therefrire need afstronger sp1-'ing than thatv 75 required in thepresent-constructionv 'Where much effort is ,require`d, `to open the valve, it usually` results infrnov'ement ofthe blowpipethereby throwing, he jet away-from.

strike. Arranging the vvalve'in the Iforward ves .-46, 47,52, are made of the alloy known` lin the market las". Monel :'metal, -instead of'brass'asheretofore. `Monel 'metalisfnotalfected by oxygen (as steel is), and is 'notvcorrodedvby other gases or sub- 90 stance which may come'in contact with it in the lblowpipe. 'ltalso givesa thread'that I will 'stand' long and severe use 'without s howingl wear, whereasbra'ss thread would wear outlinafmuc'h shorter time. The valve seats, 95 however,-are brass, which is softer than the Monelmetal valve stems, so-that after long 'Suse the`fit of the v alve in the s ea't` is even betterfthan. at the start. T

Theva'lve 53,v 'which controls the supply of against the tensioniof its spring to open the passage into theotube 29 bya bell-crank lever 54c'omposed of two parallel plates working in. slots in the` handle-sleeve 38 and fulwhich it is .pressing `the thumb-piece there is no tendenc'y 'toturn the blow pipe on its axis and i #thereby throw the flame out-of the line of l cut, Iasi's the casewith-fblowpipes in which thethumb-piece is offset laterallyfrom the aXisofthe blowpipe., In thepre'sent construction the thumbpiece is slidable on` the iprojecting arm of thebell-crank lever, and.

`ha's-a'iinger 58l depending between the two plates ,forming thebell-crank. This finger projects through a slot in the sleeve 38 and is 'formelv with a notch 59. When the thumb-piece is depressed to open the Valve the loperator can push the thumb-piece forward, so that the notch engages the end of the slot inthe sleeve 38, thereby locking the valve in op'enposition.v To close'the valve, itis only necessary to retract the thumb-piece, wherel. Ina metal-.working.blowpipe, in com.

bination, a nozzle-head having a socket in its end provided with an annular shoulder near the bottom of the socket, and `having' an oxygen bore voi'jjuassage opening into the socket, a neck 'encircling the orifice of the oxygen passage to provide anfannular space at the bottom of the 'socket,'anda combusti'- ble-mixture bore or passage opening into said-annular space; an .oxygen jettube extending outwardly from the -socket,..having .its inner end seated on the said neck and having an apertured flange seated onsaid shoulder; a nozzle'memberl having a Vcentral bore of greater diameter than said oxygen tube, encirclingthe 'latter` and screwf ing the orifice of the passage t0 provide an' threaded in said A'socket to bind the apertured flange of the oxygen tube' tightly upon said shoulder; and a tip of'greater diamete than the .oxygen tube, surrounding the latter..

and fixed in the end of said nozzle-head.

2. In a metal-working blowpipe, in comi bination, a nozzle-liead having :a socket its outer end, an oxygen passage."opening:

centrally into the socket, a neck surroundannular space around the same,fa-passage .opening intothe annular space, and .shoul-` der around the annular space; an oxygen jet tube projecting from the socket, having its inner end seated on said neck and provided `with an apertured flange seated on saidshoulder; -an inner nozzle member of brass having a central bore of greater 'diameter than the oxygen jet tube, removably threaded into the socket in the nozzle head and binding the apertured yflange of the oxygen .jet tube tightly upon the said shoulder; and an outer nozzle member of copper permanently fixed in the outer end of the inner nozzle member, surrounding the lportion of the.

oxygen vjet tube projecting from the inner nozzle member and providing an annular passage around the same.

3. In a -metal-working blowpipe, in combination, a tubular inner nozzle member of brass adapted at one end to be fitted into a nozzle-head and its other or outer-end having an annular recess, and an outer tubular nozzle member of copper having one end flared and fitted into the recess in the inner nozzle member, the metal around the recess in the latter being swaged in and over the flared endof the other member tovproduce a permanent dovetail joint between the two.

4. In a metal-working blow-pipe, in combination,` an inner tubular nozzle member ofbrass, adapted at one end to .be fitted into a socket in a nozzle-head and provided at its other end with an internal rabbet; an outer tubular nozzle member of copper having one end flared and iittedfin the rabbet, the metal lof the brass inner nozzle member, around .for a mixture of oxygen anda combustible gas, a head lcarrying the outer nozzle and having a bore opening into the said mixturepassage, an injector nozzle larranged in said bore andjdischarging into the bore toward the outer'fnozzle, an oxygen conduitfor supplying yoxygen to the injector nozzle, a maniiahyalve for controlling the flow of oxygenv through ,t-heoxygen-c'onduit to the estoi? iiozzle, a, manually operable valve "'erating directly with the injector nozzle gil-late the flow Of oxygen through the duit for. supplying a combustible ore whereby the gas is entrained by thejet of oxygen issuing lfrom njector nozzle, and a conduit connected.v with the aforesaid oxygen-passage.

for supplying oxygen thereto.

v 6. As a new article of manufacture, a metal-working blowpipe comprising a handle, a nozzle having an end provided with orifices for directing a pre-heating flame and a cutting jet of-oxygen upon the metal to be worked, a tubular head carrying the nozzle and having a gas passage for supplying Oxygen and a combustible gas to the nozzlefor the pre-heating flame, a conduit parallel with the tubular head and connected with the head between the gas-passage therein and the nozzle to supply oxygen to the -latter for the cutting jet, whereby the said conduit serves to mask the head against reflected heat, and means for supplying oxygen and combustible gas to the tubular head.

7. In a metal-working biowpipe, in combination, a handle comprising a hollow sleeve, a head fitted in the front end of the handle and having an oxygen passage in its ioo ica

lower portion, an oxygen tube connected with said,passage above the same, a springlpressed plunger-valve movable longitudinal in said passage below the oxygen tube and controlling the outflow of oxygen from the passage, a bell-crank valve-actuating lever inside the handle having a longitudinal arm extending out of the handle and an arm connected to said plunger valve, a thumbpiece carried by the bell-crank lever outside .gael-passage .andafslot,l a lever having an v..-.spring-actuated valve controlling the pas-fy manual le'verv to open v the *valve `end of saidyslot Ito bilafijaa aiholiowrwbuanhandle having extension, passing through the. slot in the" handle, a thumb' button on vsaid extension and having ajstem provided With a notch to engage With-andbe disengaged from ,the lo'ok'and unlocl; the lever, and a valve actuated bythe leveritoreontrol theffiow through said gas passager-1- i ,19. In a -metal'iworking blowpipea;l incomeV ,bin

t1on,` a' handle having a gas passagd Va agaiisttheftension of the spring,= and manu-l all tudinal passage 1 extending l through both arms, al transverse passage yextending Iin and means carriedby they OCkgthe lever atlwill 'Witlr'l a ing, into the`long'fitudinall passage at apoint ymetal?Working blovvpipe, in com# Y ,..eonneetedlwith the transverse tnatedmeans carried by the s lever` to ei'same Wththe valve'jin open posis? a n l Iv"f-ff. g `In, testimony whereof we aix our signa- '1on1-In a metal-Working blovvpipe, an--L- shapednozfzle hea-51h12"having:` the end `of'v thl-no'zzle-carrying end, a lateral extension eralI extension-27 having afpassage 26- openinadvanee `of said passage 3l; an injectornozzle in thelongitudinal passage, between `the *,saidpassags 26 and 31; a manually operable valve; loontrolling the injectorno'zzle'; atube connected with the passage 26-toconvey a combustible gas thereto; a

. tube' co nnected with the-passage 31 to convey oxygenlthereto;` a tube connected with said "transverse passage to j carry oxygen thereto; anda nozzle carried bythe nozzlehead, having a passage connected, with said longitudinal passage to receive a mixture of e oxygen and the combustible gas therefrom to ysupply/fa heating flame,` and apassage tures in the presence of twosubscribing Witnesses.

.v MILTON E.` WINANS.

, t PAUL A. ROSE. Witnesses:

vDRURY W. COOPER, STURGES S DUNH'AM.

i rearof'the ylongitudinal passage, and 'alata passage to re- '-"eiveogygen therefrom to supply a cutting

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