US1372735A - Blowpipe - Google Patents

Description

G. H. ZOUCK.

BLOWPIPE.

APPLICATION FIILED APR. 18. 1919.

1 8?% 735o W Mm 29 11921.,

INVENTOR Gfiaw-o Zorue/' I BY 4 ATTORN 'UNHTJED STATES PATENT CJDFFHCEO GEORGE E. ZUUCK, 0F ORANGE, NEW JERSEY, ASSIGNOR TO AIR REDUCTION COM- PANY, INCORPORATED, A CORPORATION'OF NEW YORK.

BLOWIPIPE.

Application filed April 18, 1919.

T 0 all whom it may concern:

Be it known that I, GEORGE H. Zopcx, a citizen of the United States, residing at Orange, in the countyof Essex, State of art to which it appertains to make and use the same.

This invention relates to blowpipes burning mixtures of combustible and oxidizing gases to produce high temperature flames for heating, welding and cutting operations, and more particularly to the type of blowpipes illustrated and described in my copending applications Serial No. 259,892-and Serial No. 259,893. p

The object of my invention is the preservation of the structure and the maintenance of the proper proportioning of the gases.

Further objects and advantages of the invention will be, apparent as it is better understood by reference to the following specification when read in connection with the accompanying drawing in which;

Figure 1 is a longitudinal section through a blowpipe head and tip embodying my invention;

Fig. 2 is a section on the line 2 2 of Fig. 1; and

Fig. 3 is a rear end elevation of the tip.

In blowpipes of the character referred to, the tips, are constructed of copper or of alloys in which copper predominates, such as bronze. The combustible gas is delivered to the discharge passage of the tip through grooves or depressions in the surface at the rear of the tip. The tip is held in assembled relation with the blowpipe head by a nut. When the tip is constructed of relatively soft metal such as copper, the grooves may,

if pressure is carelessly applied to the nut while the tip is heated. be deformed and reduced in cross sectional area. This may result in a variation of the capacity of thegrooves or depressions, which are carefully formed in the-blowpipe to convey a predetermined amount of gas to the discharge passage of the tip.

I have discovered that deformation of the grooves or depressions may be easily prevented by surrounding that portion of the Specification of Letters Patent.

Patented Ma. 2e, rear.

Serial No. 291,104.

tip, in which such grooves or depressions are formed, by a collar of a metal which is more resistant to deformation than the body of the tip. Such a collar may be shrunk onto the tip or it may be threadedly or otherwise secured thereto.-

When the tip is thus protected the metal, of which it is constructed, is prevented from flowlng under the influence of heat and pressure and the grooves or depressions are maintained in their original form and dimenslons. Thus the structure is preserved, the proper functioning thereof is insured and the intended proportion of gases in the .mixture is maintained, regardless of the:

Referring to the drawing, in which I have illustrated a preferred mode of applying my invention, 5 indicates a blowpipe head havmg passages 6 and 7" to which oxidizing and combustible gas are delivered through pipes 8 and 9. The passage 6 terminates at the apex of a conical seat 10, in which an annular channel 11 is formed, surrounding the end of the passage 6. The passage 7 terminates in the channel 11.

A tip 12 having a discharge passage 13 is held in assembled relation with the head by a nut 14:. The tip is provided at its inner end with a conical surface cooperating with the seat 10 to form a gas-tight joint surrounding the channel 11. Grooves or depressions 15 are milled, pressed or otherwise formed in the conical surface to convey combustible gas from the channel 11 to the d1scharge passage 13 where it mixes at the inlet to the discharge passage, with oxidizing gas from the passage 6. The grooves or depressions 15 are carefully proportioned to deliver, at a given pressure, a predetermined volume of combustible gas to the discharge passage 13.

Surrounding the enlarged end of the tip 12 is a collar 16 which is preferably flanged at 17 toengage a shoulder on the tip against which the nut 14 bears. Preferably the collar 16 is spun over the edge of the tip as indicated at 18. The collar is formed of a metal, having a higher resistance to deformation than the metal of the tip. The tendency of pressure applied by the nut 14 is to cause the end of the tip to bulge and flatten with accompanying distortion of the grooves or depressions 15. The collar 16 maintains the end of the tip in its original shape. Thus preservation of the grooves or depressions 15 is accomplished.

Various changes may be made in the form, arrangement and construction of the parts, Without departing from the invention or sacrificing any of its advantages.

I claim:

-1. In a blowpipe, the combination with a head, having passages for oxidizing and combustible gas and a seat, of a removable tip having a discharge passage, a surface cooperating with said seat, and grooves or depressions in said surface whereby gas from one of the passages in said head is conveyed to and mixed with gas from the other passages in said head at the mouth of said discharge passage, means for holding said head and tip in assembled relation and a. collar mounted on and surrounding "the inner end of the removable tip to prevent deformation thereof when pressure is applied thereto by said holding means.

2. In a blowpipe, the combination with a head, having passages for oxidizing and combustible gas and a projecting conical seat, of .a removable tip having a discharge passage, a recessed surface cooperating with said seat, and radially disposed grooves or inner end of said removable tip to prevent deformation of said grooves when pressure is applied to said tip by said holding means.

In testimony whereof I afliX my signature.

* GEORGE H. ZOUGK.

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