US985159A - Gas-blowpipe. - Google Patents

Description

N. GOODYEAR.

GAS BLOWPIPE. APPLICATION IIL ED AUG.7, 1909.

Patented Feb.'28, 1911.

i Z W M V. Q 4 J6 mv f BY Q @mmam To all it may concern:

, in which two gases such before they issue from NELSON soonxnan, or NEW YOBK,'N. Y.,'- assmnon ro MAINE DEVELOPMENT CORPORATION, A CORPORATION OF MAINE.

cas-nnowr rn.

Specification of Letters Patent. I

Patented Feb. 28, 1911.

Application filed @ugust 7, 1909. Serial No. 511,822.

Be it known that I, NELSON GOODYEAR, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Gas-Blowpipes, of which the following is a specification accompanied by drawings. 7

This invention relates more particularly to'the head 01' nozzle portion of blow pipes, as'acetylene and oxygen are burned, and means for easily controlling the mixture of the gases used the. outer orifice of the nozzle.

The invention also relates to the improved means for adapting a blow pipe of a given size to'use different nozzles ofva rious sizes and forms, forhaving separate blow pipes for each size or shape of flame thatis required for use in brazing or autogenous welding operations.

. Referring to the drawings, Figure l is a longitudinal cross sectional one form of the invention; Fig. 2 is a top plan view of Fig. 1; Fig. 3 is aside elevation of the parts shown in Figs. 1 and. 2 mounted in a suitable handle; and Fig. 4 is a longitudinal cross sectional view of another form embodying certain features of the invention.

' Referring to Fig. 1', A is the inlet for one of the gases used and B is the inlet for the other. It is preferable that the gas which is under the higher pressure should enter at A, as for example when oxygen and acetylene are used it is customary to have the oxygen under a higher pressure than the acetylene and in such a case A' would be the oxygen inlet. l

The gas isled tot-he inlets A and B by suitable shown at C and D in Fig. 3, which may be of flexible metallic tubing, adjustment of the head E of the blow pipe at various angles'with reference to the handle F. Referring again to thevarious figures, the head E is adapted to receive and support by means of the screw thread Ga is of great importance to have the gases doing away with the necessity.

view through portion of the b gas pipe connections or conduits as so as to permit an piece H embodying a throat I and'a mixingchamber J. The piece '11 is in turn ada. ted

thoroughly mixed in a suitable chamber as shown at J before the issue from the nozzle-- metal operated on with a neutral or reduclng flame avoiding in most cases any tendcncy to oxidation. In order to attain the proper mixture of the two gases, the one which is'under the higher ressure enters through the inlet A throng the passages clearly shown in the drawings to the nipple L, which has a converging orifice M projecting well into the throat'I which constitutes the entrance to the mixing chamber J. The converging orifice M is provided with a needle valve N, which fing box 0, so that the needle valve may be controlled readily by means of the knurled head'P, a portion of the needle valve being provided with a screw threadQwhich engages in a corresponding threzkd R in some ow pipe rig dly fixed in relation to the nipple L. Thev gas which is under the lower prexure enters through the inlet B and passes throu 11 the various passages clearly shown to t the nipple Land enters the throat I through the annular space between the outwardly tapered end of the nipple L, and converging wall T formed in the piece H which leads into the throat I. It is desirable.to have one of the gases enter the mlxmg chamber J through the throat I at a greater velocity than the other gas, in order that eddies may be formed in the mixing gases and effectually mingle them into a homogeneous mixture before they leave the orifice in the nozzle. K. I

It is usual in blow ipes for the purposes herein described and which have interchan eable nozzles corresponding to the'nozzle I ofv various sizes, to be providedwith mixin chambers of greater or lessefii'ciency and a so with separate inlets to the mixing chamber for the two gases correspond ng to the outlet orifice of the ni ple L and to the annular orifice U and in su blow p1 es it is necessary or desirable that the ,or ces also there would be danger of passes through a stufe space S around corresponding to. the outlet orifice of the nipple 'L and the orifice U be interchange" may correspond 1n able also, so that the proper proportion wit the orifice 1n the mthenozzle-K; This is acconi mg not only the outer, nozz e-interchangewith terchan geable nozzle, h

is e s y avableg'but by having separate detachable .noz-

zles' or orifices corresponding to the out-let.

of thenipple N or by having the piece H of various slzes', each carrying its mixing chain-- ber, outer nozzle and inlet nozzle corresponding to the outlet of the nipple L. In the former case the operator has the inconven-' ience of changing several small par't's', which "not only takes some little time but error is likely to be made in getting the proper cor-- responding sizes right. Inthe latter case dle valveN and ifd'esired, by varying gthe 2 there is the difiiculty of joining in one oper- .atf'ion, in a gas tight manner; the connections size of the annular orifice U by changing the as'providedjby the thread W,

flat, thetime compress cal rt-ion M of the-nipple {L with relat'ion to t e=converging wal Tleadin tothe throat 1. This may beaccomplishedin '1', 2 and '3 bymeans efthe adjasting'wheel "V or in the formshownin Figdbyfthe back or forward movement-of the piece-" H in the form shown-in Figs; 1- and, 2 the nipple L is adapted to slide ack-and .forth throuiglh thehead' E which is provided with a stu ng box X-, the glandof which is pressedby the spring Z. ,The interposed] between the gland I ring Z is 1 and the collara', which is securely fastened to the nippleL; so that the springZ tendsto. push the nippleL forward into the throat" I and the packing "in into an ei'rterii'ally, threade freej regimes 'i Ii-ahollow c in the head E. The saternaiihreadef the piece 1) engages thestuiii'n lick-X, flhehi l'e L is'screwed g 4 PP ,piece b whic h. is-

, A fisintlie thrbad iii the wheel V so that by turning thewheely the L maybe moved backward or forward against 01 with the spring Z,.'tl1us varying the orifice U.

. 1151;- he r m shown-m ragga adjusting" ifithread is provided with lock nuts d; an

washer efor the purpose of preventing. an-

v-escape of ga's'through the thread Wand for the purpose of lockin therelative adj-11stmentbetween th nip e L aiidthe piece H .r to vary the ori c'e- I been'found unnecessary to ange the -orifices for both gases where they enter the throat I whenchangin the outer-nozzle K. a

It. is only desirable t-oc ange the orifice carpressure. he other may beleft open wide enough at all times-to supply the la! est sized nozzle Kemployed. It will there ore be understood that if desired the needle valve N-may :be opened up wide provided gases have been arranged axially in a man: ner somewhat similar to that shown inthe accompanying drawings but with "the i n portantd1fierence that the needle valve admitting the high pressure gas; does not have its variable" pr-lficei at the-point-ofj-discharge into the throat of the mixing chamber. "The advantage of having the high p'i'esslue gas discharge orifioeclose to theentrance of the relative adj ustmentbe'tween the outer conimix-ing chamber; is forthepurpose'bf deri-r? ging the fli'll'j benefit-"of "the velocity which 'is greatest at the point'of restriction of the f' valve; lt will befnoticed in theiacco mpan .ith e mjix ing chamber are tapered a very gradual way-for: the deliveryend of the .-head' of. the blow pipe at any desired ans In 'racti'ce it has;

as which is under the higher- ?so that the momentum of gases which travel at considerablevelocities tends to carry them forward into the 'mixing cha m ber and obviates any tendency 'tob'ack be more or less the case'were t ie' entrances "to the throat I not nearly coincident'in ldi+ rection with the axis-02E the blow ipe.

In a blow pipe like that herein s 1 own the fwhichare carried fina-fork h--branc iiig fron1' a cylindric'al handle F,- one of the vbranches of the fork H is provided with a the pin'j being threaded where it passes thumb nut 'k' tort-he purpose'of fixing lie with reference 'to the handle F. In or er that the head maybe movable with reference' to the handle without breaking the connection, the latter-are made fleiiible either in the sense of being flexible-hose as be made-by swing oints m the trunnions similar to swing joints in ordinary gas brackets, in which case the gasesjwould be brought'to the .trunnions by making the two arms of the fork h tubular. Th s adpipe is of great convenience'and thereare so many Ways for accomplishing the dcsired end that it seems unnecessaryto sh'ow ow sa that the currentof the gases is as nearlyas may be alongman axial line, v

shown in the drawing at C D,;or they may been designed for use in connection with acetylene and air, the valves for the two ping drawih the orificesdelivering "t e .two gases-" i;i itoi the'throat I or entrance-to v z-or obstruct the flow of-the other, as as won" head is mounted on-trunnion screws Q'g' circular slotdthrough which a pin "travels,

l through the slot-{i and adapted tocarry a. t e

justa'ble' feature. of the head of the blow i cii them since the method of using. flexible hose connections adequately establishes the invention in this particular.

In Figs. 1, 2 and 3 the outer nozzle K is shownadapted to be clamped against the piece I by means of a ring 11?. and toggle joint 92-, 0 the part 0 having a thumb piece 79 for convenience in manipulation. The nozzles K fit with the ground joint over the outer conical portion of the piece l. Any discrepancy in the exactinterchangeability of the nozzles K being compensated by the spring in the links a of the toggle n, 0. Referring to Fig. 3 g is an extension piece for the handle F which is tubular and telescopes over the handle I so that the handle as a whole may be varied in length to suit conditions on varying classes of work.

It will be understood that the embodiment of the invention herein shown is only one of many which may be devised and I do not limit my claims to the particular structure ordescribed.

I claim and desire to obtain by Letters Patent the following:

1. In a gas blow pipe the combination of a chambered head having gas inlet orifices, a nipple and needle valve therein, a throat piece connected to said head and provided with a contracted portion, and a mixing chamber, the point of conflux of the gases being in said contracted portion, and means for removably connecting a nozzle to said throat piece comprising a iece Z having a conical surface, and means orclamping the nozzle against the piece Z.

A gas blow pipe having a nipple for one of the gases, a needle valve for controlling the nipple, a mixing chamber and a throat, gas connections for the other gas leading to said throat, and means for adjusting the said nipple longitudinally including a spring acting thereon in one 'direction.

3. A gas blow pipe having a nipple for one of the gases,

a needle valve for controlarrangement of parts herein ling the nipple, a mixing chamber and a throat, gas connections for the other gas leading to said throat, and means for adjusting the said nipple longitudinally including a spring acting thereon in one direction and a stufling box around said nipple upon which the said spring acts compressively.

4. A gas blow pipe having a nipple for one of the gases, a needle valve for controlling the nipple, a mixing chamber and a throat, gas connections for the other gas leading to said throat, and means for adjusting the said nipple longitudinally i11- cluding a spring acting thereon in one direction and av screw mechanism for moving it in opposition to said sprin A gas blow pipe having a mixing chamber, gas inlet connections, and means for regulating the volume of gases, a nozzle, and means for securing nozzles interchangeably to the blow pipe comprising a ring for receiving'andholding the nozzle, a seat or surface fitted to receive the nozzle, and a toggle joint connection for drawing the ring and nozzle against the said surface.

6. A. gas blow pipe having a head, a gas mixing chamber, a nozzle, inlets for the gases to be mixed. a handle having a fork and pivotal connections between the said head and the fork, gas connections extending from the handle to thesaid inlets.

7. A gas blow pipe having a head, a gas mixing chamber, a nozzle, inlets for the gases. to be mixed a handle having a fork and pivotal connections between the said head and the fork and means for securing the pivotal connection at various positions of adjustment.

I11 testimony whereof I have signed this specification in the presence of two, subscribing witnesses, August 3rd 1909.

NELSON GOODYEAR.

\Vitnesses:

E. VAN ZANDT, E. P. LA GAY.

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