US904452A - Blowpipe for burning gas mixtures. - Google Patents

Description

' G. E. ROBERTS & J. a. SULLIVAN.

BLOWPIPE FOR BURNING GAS MIXTURES- APPLICATION TILED MAY 8, 1908.

Patented Nov. 17, 1908.

' Q/W" zones To all whom it may concerri. I

; UNIT STATES PATENT OFFICE.

- GEORGE-E; Ro Ea rsAiin JOHN. c. SULLIVAN, or VALLEY-FALLS; RHODE ISLAND.

LQWPI'PE For. BURNING GAS IXTURES.

'l aitented Nov. 17, 1908.

Application filed May 8,1908. Serial No. 431,692.

Belt known that'we, GEORGE E. ROBERTS and JOHN" C; SULLIVAN, citizens ot-the United st,dltes, 'residing at Valley, Falls, in

' operation of' devices the county of Providence. and State of Rhode Island, have invented new and useful Improvements in Blowpipes for Burning- Gas Mixtures, of

which the following is a specification. w

This invention relates to a blow pipe for burning a suitable gas-mixture, and relates more particularly to improvements where-byt'he volume of eitherair or gas can bereadily varied'without. materially affecting the pressure at the orifice .or nozzle of theblow pipe.

. The invention has forone of its objects to improve andsimplify the construction and i of this character so as to be comparatively easyand inexpensive to manufacture, readily manipulated, and-composed of comparatively few parts. 1

'Another object ofthe invention is the provision of a blow pipe consisting of a body havinglseparate chambers for theair" and gas inflow and havinga nozzle piece communicating with the gas chamber and into which extends a threaded tube that com municat-es with the air "chamber for delivof air. into the nozzle piece at ermg ajet thereof, there. being a needle valve arranged V in the ,said tube whereby the volume of gas or. air cairbeindependg ently' regulated.

invention comprises .the tures of construction and-arrangementof parts which" will Ebemore fully described hereinafter and. s'etforth with particularity in the claimsappendedhereto."

In the accompanying drawing, which illus trates one embodiment of 1 the "invention, Figure, 1 ,is a central .longitudinal'sectionof .the blow pipe.

. tion of pipes connected Fig. 2 is a side elevation of the air-conducting tube thereoii} Fig. 3 is. a' similar'view of the needle-controlling valve.

Similar reference characters are employed to designate correspondingparts-through out the several views. I

Referring to the drawing, A designates a cast metal or'other body that is formed with separate inlet passages 1 and 2 that are in ternally. threaded at 3 and 4, for the recepwith a source of gas and air or other fluid under pressure,,the

ume of gas,

. outlet.

body. being formed with chambers 5 and 6 separated by a partition 7 and communicatwith the inlet passages 1- .ing, respectively, and 2. The .outer end of the chamber 5 1S internally threaded at 8 for receiving the The partition 7 has a threaded opening 12 in which screws an air-conducting tube 13 of smaller diameter and chamber 5, so that gas can freely pass around the said tube to the orifice of the nozzle piece and th'is tube has one or more openings 14 for communication with the air chamber 6 so that air said tube to the orifice of the nozzle piece and mix with the gas, and at the same time,

'force the latter from thejnozzle piece- The discharge end of the tube 13 is contracted at, 15 and has an orifice 16 alining with the nozzle :orifice 11 so that the jet of air will flow in a straight line out of the latter and suck. the gas therewith from all points around the point 15 of the tube. This tube is adjustable back and forth to vary the voland for this purpose, the tube extends out of the chamber 6 at the rear through'a plug 18 that has a threaded aperture 17, and on this projected end of the tube is a collar or ring 19 adjustable to any position and clamped in place by a set screw 20, the periphery of the ring being milled so as to aliord a better grip thereon. Thus, by turning the collar or ring in' one direction or the other, the-tube will be correspondingly turned and moved longitudinally nearer, to or away from thecontracted nozzle portion 10 sofas to .vary the area of gas ri'orly milled, and secured to the cap nut is,

a needle valve 22 that is of greater. length than the tube 13 so as to project tothe forward end of the latter where it is .formed into a point 23 that coiiperates with the air orifice of varying the efiectivej By' turning 16 for the purpose outlet area of the said tube.' this cap nut 21 while the tube tionary by gripping the ring valve can be'moved longitudinally to vary the effective air outlet opening. WVhen the is held statube 13 is adjusted by the turning of'the valve-willv gas volumeacan ring 19, the position of the needle not be altered so that the be changed independently. With a burner than the nozzle piece.

can flow through the On-the rear extremity of the-tube 13'. is threaded a cap nut 21 which is exte- 19, the needle of this character, the proportions of air and gas can be nicely adjusted to produce an in-' tense blue flame of. any desired volume.

From the foregoing description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention a-ppertains, and while we have described the principle of operation of the invention, together with the device which we now consider to be the best embodiment thereof, we desire to have it understood that the device. shown is merely illustrative, and that such changes may be niadewlien de sired as are within the scope of the appended claims.

Having thus described the invention, what weclaim is 1. In a blow pipe, the combination of body having separate gas and air chambers and inlet passages communicating therewith,

a partition separating the chambers and havthreaded in the opening of the partition eX-' tending into the nozzle piece at one end and out-of the body at the opposite end, said tube having an opening communicating with the air chamber, a needle valve disposed within the tube for controlling the outlet opening of the latter, an adjusting member closing and threaded on the outer endof the tube for moving the needle valve'back and forth, a wheel screwed on the tube between the said member and end of the body for movingthe tube back and forth by rotary movement to vary the effective outlet of the gas and outlet of the nozzle piece, and means for clamping the wheel to the tube.

'2. A blow pipe comprising'a body having separate air and gas chambers divided by a partition, said partition having a threaded opening extending from one side to the other, a tubular nozzle detachably secured to the body to communicate with the gas chamber thereof and having a frusto-conical discharge end disposed axially in alinement with the said threaded opening of the partition, a cap nutattached to the body to close the air chamber and provided with a threaded opening alining with'that of the partition, said body having supply passages communicating with the respective chambers, an air -discharging tube of greater length, than the length of the nozzle and body combined and projecting at one end out of the body and having its opposite end contracted and terminating adjacent the frustoconical end of the nozzle, a continuous screw thread on the tube extending from one end inwardly to an intermediate point for engaging the threaded openings of the nut and partition for moving the tube longitudinally by a rotary movement, the threaded portion of the tube having air inlet openings communicating with the air chamber, a member threaded on and rigidly secured to the projecting end of the tube for turning the latter, a needle valve disposed within thetube and having one end arranged to vary the effective opening at the said contracted end, a device movably mounted and threaded on the projecting end of the tube and connected with the needle valve for regulating the latter, said device forming a closure for the outer end of the tube.

4 3. In a blow pipe, the combination of a single piece body having separate air and gas chambers, a nozzle piece on t-he body and communicating with the gas chamber and provided with a discharge orifice, an air tube arranged within the body and extending into the nozzle piece and provided with an opening intermediate its ends for communicating with the air chamber, said tube being of greater length than the combined length of the body and nozzle piece to project out of the rear end of the body, a thread on the tube extending from the outer end to a point adjacentthe middle thereof and engaging the body to move back and forth by a rotary movement, an adjusting wheel screwed on the said thread of the tube and clamped thereto, a nut engaging the thread on the e'x tremity of the tube and closing the outer end of the latter, and a needle valve rigidly-Secured to the nut and extending the full length of the tube and having a point cooperating with the discharge orifice of the latter.

In testimony whereof We aflix our signatures in presence of two witnesses.

CHARLES C. Rror-mnnson, FARLE J. BURLINGAME.

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