US1172729A

US1172729A - Mixing-head for gas-torches.

Info

Publication number: US1172729A
Authority: US
Inventors: John G Pettis
Original assignee: Imperial Brass Manufacturing Co
Current assignee: Imperial Brass Manufacturing Co
Priority date: 1914-12-14
Filing date: 1914-12-14
Publication date: 1916-02-22
Anticipated expiration: 1933-02-22

Description

.1.6. PENIS. l

` MIXING HEAD FOR GAS TORCHES.

APPLICAT|0N-FILED DEC. I4, 1914.A

ment-ed Feb."22,1916.

mm um. mw S 5 our"ran sfrafrns rara MIXING-HEAD FOR GAS-TORQHES.

- Specicaton of Letters Patent.

Patented name2, 1ero.

Application filed December 14, 1914. Serial No. 877,042.

To all whom 'it may concern.' I Be it known that I, JOHN G. Pn'rrrs a citizen of the UnitedStatea, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful improvements in Mixing-Heads for Gas- Torches, of which the following is a full, clear, and exact description.

My invention relates to gas torches for welding and cutting metal, and particularly to torches of this character empli-j,- ing means for producing both a combined acetylene and oxygen gas, and supplying a pure oxygen gas under pressure.

The object of my invention is to provide valve-controlled means for dividing and utilizing the oxygen gas obtained from vone of the valve-controlled systems 'of passages throughthe torch without aecting the necessary supply of oxygen to mixvwith acetylene gas that Hows' through the other system of passages therethrough, and a further object of my invention is to provide both a manually operated and automatically operated valve-control for such divided stream v oI" pure oxygen gas.

These and other objects I am enabled to accomplish by the means hereinafter fully described, and as particularly pointedout ini'the claims. v

In the drawings:v Figure 1 is a longitudi` nal section of a gas torch embodying my improvements that'has part of the pipes* leading therefrom to the tip broken away.

Fig. 2 is a transversesection therethrough tahen'on dotted' line 2 2, Fig. '1. -Fig. 3 is a transverse section taken on dotted line 3 3, Fig. l. Fig. et is a transverse section taken on dotted line 4 4, Fig. l. Fig. 5 is a transverse section taken on dotted linel 5-5, Fig. l.

Referring to the drawings', A represents a handle consisting of a tubular casing of sufficient length whichis' closed by suitable plug a at its rear end and by a suitable body Batits forward end. Thisbody projects forward beyondy said handle a suitable distance, and has the reduced rear screw-threaded end of an axially allning mixing-head C screwed into the same. This-` mixing-head has 'a central bore c therethrough andfhasa spiral groove o extendlatter conveys the said into a tip X. The construction of thisI tip ing from the rear end offtsfoXt'ejif` th tapered f orward end` thereof,-y and fitis inclosed within the correspondingly sha ed rear end portion of the borebfa v.pipe

The rear end of pipe D` is exteriorly threaded and screwed into the countersunk forwardv end of the body. The rear.v edge of pipe l) is beveled inwardly or counter;

'sunk and provides an annular chamber d around the rear end of the mixing-head rommhich the oxygen gas is fed to the spiral groove c, and discharged therefrom into and mixed with the acetylene gas discharged into the bore of pipel D, which gaseous mixture forms the ysubject-matter of fato-pending application led DecemberM, 1914, Serial No. 877,043, and, therefore, isnot described herein.` Y

The tubular casing of .theliandle has two longitudinally disposed .pipesfeand extending therethrough, l the` 1rear' 'ends of which extend into the plugja andareffconnected by suitable nipples withcsuitable gas supply sources (not shown). The 'forward into the rear end of body `land are, respectively, connected bysuitable fvalve coniected passages to the bore offthe mixingheadandthe annular chamber ZZV at'fthe into a longitudinal bore 2thatg extends forward a. short distanceinto the bushing and empties into the transverse of a spindle-valve 4. The :conical shaped inner-vy end of valve-seat 3 extends tol or slightly past the axial centeryofthebody,and Connects with a transaxialpassage 5.at right angles thereto, and this transaxial passagel 5 has its `outer end closed andits inner end'v communicating with a. longitudinal passage 6, whose rear end is plugged up and whose forward end discharges into avlateral passage 7 withwhich the rear end of the bore, 'of the mixing-head communicates.-

Thevpipe f, from whichthe loxygen gas ends of supply-pipes e and f ,aietapped aonrrarnrrrs, or on1caGo, ii.LrNoIs, Assrenon To aan rMrnRiALfnnAssMANU-'- raornmue COMPANY, or CHICAGO, rLLINoIs, A cem-innamora `or IL'LI1\ioIs;y t

. passage 8 in the body that extends from" a point mediate transaxial d 7, at which point it communicates with a lateral passage 9 which discharges into the valve-seat 10 of a spin# 2 is obtained, discharges into a longitudinal the yrear end to passages 5 an dle valve 12, whose axis is parallel to the axis ofspindlefvalve 4. A longitudinal valve-seat 10 lwith the passage 13- connects and thusl supplies the annular-chamber cl,

oxygen gas tothe spiral groove encircling receive the screw-threaded stub 14 of a valve 18 is provided with .center in alinement with casing which latter has an automatic valve forfcontrolling the pressure of the divided stream of pure oxygen gas that passes therethrough and is fed to the tip of the torch in conjunction with the mixed acetylene and oxygen gases. that have been combined by the mixing-head, as hereinbefore explained. The axis of this valve casing is parallelto that of. the body, and it comprises two cast metal sections and stub 14; from the forward section 15 thereof. The bore of stub ll'constitutes a lateral passage 16 that extends int'o section 15 to about its the axis of lateral passage 9 of the body, and the inner end of passage 16 extends to the rear and charges into the seat of a needle-valve 18 the axis of the shaft of which latter alines with the axis of the casing. The shaft of valve a series of longitudinal grooves or corrugations, and when the valve is open the gas from passage 16v will iovv` through these corrugations into a large chamber 19 surrounding the rear end of the shaft of the-valve. Thisrear end of the shaft of valve 18 is provided with a circular head of suflicient diameter that normally bears against diaphragm 20, which latter consists of a circular plate of thin flat metal or leather the margins of which are secured against the annular rear edge of section 15 of the casing by the rear section 21 of the same.

Rear section 21 consists of a substantially cylindrical metal casting which has a central bore therethrough the forward end of which is o f such increased diameter as to enable it to be screwed over the rear end of forward section 15. forward portion of the bore of section 21 is reduced to the diameter of chamber 19, thus creating a shoulder between which and the annular rear edge of the forward section the margins of diaphragm 20 are clamped and securely 'confined when the said rear section is screwed home. The rear face of the diaphragm 20 projects laterally dls- The diameter of this' hasla circular pressurefoot bearing against 1t, and this face is adapted to be engaged'by theforward end of a tubular set-screw reduced screw-threaded rear porvtpllrof the bore of section 21.

plunger 23 secured thereto 'whichextends 22 which engages the 7 0 I Said pressure-foot has a axially and rearwardly through the bore off.

screw 22j/and hasonits'rear end a suitable head 25 with which to: manipulate it;

The forward end lof ysection 15 `of the valve casing is'provided with a short axial bore 26and a suitable nipple 27a adapted.

to be screwed into thesame until its rear.;-

end is separated a short rear `end of said bore.

cular chamber which-is' connected by a longitudina'l exit passage 28 'with chamber 19, substantially -as shown.` The forward end of nippleA 27 is exteriorly screw-threaded and the rear end of apipe distance from the, This leavesra cirf -v 29'v is inserted and securedtherein byv means of a gland-nut 30 i or in any other suitable manner, which pipe leads to the tip from which pure oxygen gas is discharged in conjunction with. the com-- bined a oxygen and acetylene gases dis-l charged into pipe D from the mixing-head C, as hereinbefore specified.

The operation of my invention is apparent-The acetylene gas discharges from pipe e into bore 2 and fromthence intolthe transverse valve-seat 3 where 'the volumeof the flow of ygas is controlled by spindle-valve 4L. From the valve-seat the acetylene gas flows into the transaxial passage 5 and from the latter enters the longitudinal passage 6 and from thence into the lateral passage 7 and to the rear end of the bore of the mixing-head. The oxygen gas discharges froml Y 8 and from pipe finto longitudinal` passage into lateral the forward endl of this passage passage y9 which' discharges the gas into valve-seat 10 of spindle-valve 12 which latter controls the flow of gas into the longitudinal passage 13 leading ytoannulancham` ber Z, from which oxygen gas enters the,

spiral groove of the mlxing-head. The oxygen gas is given awhirling movement by the spiral groove as it discharges from the forward extremity of the mixing-head and it combines with the acetylene gas, and together therewith discharges through pipe D.

A portion of the oxygen gas from passage S of the body enters the lateral passage 16 of the forward section 15 of the valve lcaslng, and is controlled by vneedle-valve 18 as it flows into chamber 19 therefrom from whence it discharges through passa e 28 into thev rear end of the bore 26 and ows into pipe 29 leading to the'tip. The volume of the oxygen gas flowing into chamber 19is controlled by manipulating either screw 22 so as to press the diaphragm 2O forward and move the point of the shaft of needle-valve.

18 forward' into its seat, or by pushing the plunger 23 forward (which the operator does by pressing his thumb against head 25) so as to temporarily control the diaphragm and valve to limit the flow of gas.- 1 i What I claim as new is: 1 l. A gas torch comprising a body and a valve casing, said body having passages therethrough, valves controlling said passages, and a device for mixing the gas-issuing therefrom, and said valve casing having a chamber, a diaphragm in said chamber, an inlet passage to said chamber, a valve connected to said diaphragm controlling said inlet passage,and an outlet passage from said chambenf.l

2. A gas torch comprising a body and-a valve casing, said body having passages therethrough, valves controlling said passages, and a device for mixing the gas issuing therefrom, and said valve casing having a chamber, a diaphragm in said chamber, axially extending means for regulating the` movement of said diaphragm, an inlet pas-- sage to said chamber, a valve connected to said diaphragm controlling said inlet passage, and an outlet passage from said chamber. H

3. A gas torch comprising a body and valve casing, said body having passages therethrough, valves controlling said passages, and a device for mixing the gas issuing therefrom, and said valve casing having a chamber, a diaphragm in said chamber, a plunger attachedto and extending axially from said diaphragm, a tubular set-screw through which said plunger extends, an inlet passage to said chamber, a valve connected to said diaphragm controlling said inlet passage, andjan outlet passage from said chamber.

4. A gas torch comprising a body and a valve-casing, said body having two independent sets "of gas passages therethrough, valves controlling said passages, a lateral passage extending from one of said gas passages out through the side of said body, and a device for mixing the gas issuing from said body, and said valve-casing having a chamber, a diaphragm in said chamber, an inlet passage to said chamber, a valve connected to said diaphragm and controlling said inlet passage, and an outlet passage leading from said chamber.

5. A gas torch comprising a body and a valve-casing, said body having two independent sets of gas passages therethrough, valves controlling said passages, a lateral passage extending from' one 4of said gas' passages out through the side of said body, and a device for mixing the gas issuing from said body, and said valve-casing having a chamber, a diaphragm in said chamber, means for regulating the movement of said diaphragm, an inlet passage to said chamber, a valve connected to said diaphragm and icontrolling inlet passage, and .an` outlet passage leading from '.sald chamber.

6. vA gas torch comprising body and a valve-casing, said body. having two independent sets of gas:passagestherethrough,

valves controlling said passages, a lateral passage extending fromone of said gas passages out throughthe s ide of said body, and a device for mixing the gas' issuing from said body, and said valve-casing having a chamber, a diaphragm in'said chamber, a plunger connected to said diaphragm, a tubular screw through which said plunger extends, means for regulating the movement of said diaphragm, an inlet passage to.said chamber, a valve connected to said diaphragm and controlling said inlet passage, and an outlet passage leading from said chamber. v

7 A gas torch comprising abody and a valve-casing, said body having two independent sets of gas passages therethrough, valves controlling said passages, a lateral passage extending from one of said gas passages out through the side of said body, and a device for mixing the gas issuing therefrom, and said valve-casing having a chamber, a diaphragm in said chamber, a regulating plunger for said diaphragm, an inlet passage to said chamber, a valve connected to said diaphragm and controlling said inlet passage, and an outlet passage leading from said chamber.l

8. A gas torch comprising a body having a plurality df gas passages, and a device for mixing the gas issuing therefrom, and an exterior- 'valve-casing colmn'unicating therewith having an interior chamber having inlet and outlet passages, and an automatic valve in said chamber controlling one of said passages.

9. A gas torch comprising a body having a plurality of gas passages, and a device for mixing the gas issuing therefrom, and an.

exterior valve-casing having an interior and an automatic valve in said chamber controlling said inlet passage.

10. A gas torch comprising a body having a plurality of gas passages, a device for mixing the gas issuing therefrom, and a valvecasing having an interior chamber having inlet and outlet passages, an automatic valve in said chamber controlling one of saidpassages, and a regulating means for said valve.

11. A gas torch comprising a body having a plurality of gas passages, a device for mixing the gas issuing therefrom, and valvecasing having an interior chamber having inlet and outlet passages, a valve in said chamber controlling one of said passages, and regulating means for said valve tapped into said casing.

12. A gas torch comprising a body having a plurality of gas passages, a. device vfor In Witness whereof I have'hereunto set mixing the gas issuing therefrom, and e. my hand andseal this 4th day of December, 'valve-casing havingan interior chamber 1914.

having inlet and outlet passages, a valve in JOHN G. PETTIS. .v5 'said chamber controlling one` of said pas- Witnessesr sages, and a regulating diaphragm for said FRANK D. THOMASON,

valve in said chamber. y JOHN MILES.