US796938A - Making lapweld-tubing. - Google Patents

Description

\NO- 796,938. PATENTEDAUG. a, 1905. G. SGHUHMANN w. H. MATHESON.

MAKING LAPWELD TUBING. APPLICATION FILED JA 1I. 2a, 1905.

ANDREW a mum rm, PnuYo-LITNOGRAPWEIIB. wAsmNGYnN. u. c.

UNITED STATES GEORGE SCHUHMANN AND JAMES H. MATHESON, OF READING, PENN- SYLVANIA.

MAKING LAPWELD-TUBING.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Original application filed December 20, 1904, Serial No. 287,660. Divided and this application filed January 28,1905. Serial No. 243,026.

To all whmn it may concern:

Be it known that we, GEORGE SCHUHMANN and JAMES H. MATH ESON, citizens of the United States, residing in Reading, county of Berks, State of Pennsylvania, have invented certain new and useful Improvements in Making Lapweld-Tubing, of which the following is a specification.

Our invention relates particularly to the manufacture of high-grade lapweld-tubing which is regularly subjected to a second run through a furnace and welding apparatus to insure a more perfect and uniform product than results from the ordinary single run.

The apparatus for carrying the invention into effect is described and claimed in our pending application, Serial No. 237,660, filed December 20, 1904, of which this application is a division.

Heretofore the tube after its first welding run has frequently been returned hot to the furnace to reheat it for a second run, such -.echarging being efl'ected either at the front End of the furnace, from which it was with- Firawn for its first run, or at the rear end, at which it was first charged, and the two runs being made either through the same welding k oils or through different welding-rolls. The 5 )utputof double-run tubing is obviously inreased by employing different welding-rolls or the first and second runs; but heretofore hese have either been provided at different ends of the furnace or pair of furnaces employed or, where both are provided at the 'same (front) end, it has been required either hat the once-welded tube be carried back to che rear end for recharging or that it be car- "ed over intervening troughs provided in 'nnection with the different weldingrolls andthe charging-opening for the purpose of recharging it and of thereafter delivering it to the sizing-rolls, through which it is finally run.

The main object of our invention is to simplify and cheapen the double-run operation by avoiding all such carrying of the tubes and also providing for a constant progression of the same from the original charging-point for the bent skelp through the several intermediate steps of the operation to the sizingrolls, as hereinafter fully described in connection with the accompanying drawing, the

novel features of the invention being specifically pointed out in the claims.

The accompanying drawing is a plan view showing diagrammatically an apparatus for carrying out our invention.

The furnace, which may be of the usual regenerative type, is indicated in horizontal section, the top portion being removed, 1 and 2 representing the side Walls, 3 the rear end wall, 4 the front end wall, 5 the hearth, and 6 the usual charging-opening in the rear end adjacent the side wall 1. The usual sizingrolls 7 and sizing-trough 8 are indicated in front of the side wall portion 2 of the furnace.

In carrying out our invention we provide a first withdrawal-opening 9 in the front wall approximately midway of the width of the furnace, a second withdrawal-opening 10 in said wall adjacent to the side wall 2 of the furnace, and a recharging-opening 11, located intermediate of said withdrawal-openings, but nearer to the first withdrawal-opening 9, as shown. openings 9 and 10 we provide any ordinary welding-rolls (marked 12 and 13, respectively) andwelding-troughs (marked 14 and 15,respectively,) and in line with said recharging-opening 11 we provide a charging-trough 16, preferably of the well-known elevating and reversing type, to permit of turning the once-welded tube end for end before recharging it into the furnace. The charging-opening 6 in the rear end of the furnace may be extended across the furnace, so as to enable the operator-to conveniently roll the series of heating-skelps and reheating-tubes laterally toward the opposite side wall 2 and to push the same through the withdrawal-openings as required.

The skelps are successively charged through the opening 6 into one side of the furnace and gradually moved toward the opposite side un-- til in line with the first withdrawal-opening 9 and properly heated for welding. They are then successively pushed through said opening 9 and into the welding-rolls 12, through which they are passed over the usual ball and mandrel-bar in the trough 14:. The mandrel-bar having been withdrawn, the tube is simply moved away from the weldingtrough 14: into the adjacent charging-trough 16, the movement still being toward the opposite wall 2 of the furnace. The latter is In line with each of the withdrawal- 1 then preferably temporarily raised by suitable means and swung so as to turn the tube end for end, and thereby provide for reversing the second run, as is customary, for the purpose of securing a more uniform product. The tube is then pushed into the furnace through the recharging-opening 11, and as it reheats it is again moved laterally toward the opposite wall 2 until in line with the second withdrawal-opening 10, through which it is finally pushed out of the furnace for its run through the second welding-rolls l3 and over the ball as before. The withdrawal of the mandrel-bar leaves the rewelded tube in the second welding-trough 15, which is nearest to the sizing-trough 8 and in direct communication therewith, as in the ordinary single-run apparatus, so that an additional lateral movement of the tube in the same direction as all previous movements thereof delivers it to the sizing-trough, from which it passes to the sizing-rolls and finally to the straighteningrolls, as usual. It will thus be seen that the lateral movement of the tube during the repeated operations of charging and withdrawing is constantly in the same direction and that the operation and mechanism are thereby much simplified and improved.

What we claim is The'improvement in manufacturing lapweld-tubing which consists in charging the bent-up skelp into a furnace on one side of the hearth thereof and thereafter constantly progressing the same toward the other side of the hearth during the successive operations of first heating them for the first welding run, second of recharging them after such run, third of reheating them for a second run, and finally, of Withdrawing them from the other side of the hearth for the second welding run, the withdrawals for the two Welding runs and the recharging being effected at the same end of the furnace.

In testimony whereof we afiix our signatures in the presence of two witnesses.

GEORGE SCHUHMANN. JAIVIES H. MATHESON. Witnesses:

FRANK P. LONGSDORF, D. M. STEWART.

It is hereby certified that Letters Patent No. 796,938, granted August 8, 1905, upon the application of George Schuhrnann and James H. Matheson, of Reading, Pennsylvania, For an improvement in Making Lapweld Tubing, was erroneously issued to said Schuhmann and Matheson as owners of said invention; whereas the said Letters Patent should have been issued to Reading Iron Company, Incorporated, of Reading, Pennsylvania, as owner of the entire interest in said invention, as shown by the assignments of record in this oflice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and scaled this 12th day of September, A. D., 1905.

[sEAL] F. I. ALLEN,

Commissioner of Patents.

then preferably temporarily raised by suitable means and swung so as to turn the tube end for end, and thereby provide for reversing the second run, as is customary, for the purpose of securing a more uniform product. The tube is then pushed into the furnace through the recharging-opening 11, and as it reheats it is again moved laterally toward the opposite wall 2 until in line with the second withdrawal-opening 10, through which it is finally pushed out of the furnace for its run through the second welding-rolls l3 and over the ball as before. The withdrawal of the mandrel-bar leaves the rewelded tube in the second welding-trough 15, which is nearest to the sizing-trough 8 and in direct communication therewith, as in the ordinary single-run apparatus, so that an additional lateral movement of the tube in the same direction as all previous movements thereof delivers it to the sizing-trough, from which it passes to the sizing-rolls and finally to the straighteningrolls, as usual. It will thus be seen that the lateral movement of the tube during the repeated operations of charging and withdrawing is constantly in the same direction and that the operation and mechanism are thereby much simplified and improved.

What we claim is The'improvement in manufacturing lapweld-tubing which consists in charging the bent-up skelp into a furnace on one side of the hearth thereof and thereafter constantly progressing the same toward the other side of the hearth during the successive operations of first heating them for the first welding run, second of recharging them after such run, third of reheating them for a second run, and finally, of Withdrawing them from the other side of the hearth for the second welding run, the withdrawals for the two Welding runs and the recharging being effected at the same end of the furnace.

In testimony whereof we afiix our signatures in the presence of two witnesses.

GEORGE SCHUHMANN. JAIVIES H. MATHESON. Witnesses:

FRANK P. LONGSDORF, D. M. STEWART.

It is hereby certified that Letters Patent No. 796,938, granted August 8, 1905, upon the application of George Schuhrnann and James H. Matheson, of Reading, Pennsylvania, For an improvement in Making Lapweld Tubing, was erroneously issued to said Schuhmann and Matheson as owners of said invention; whereas the said Letters Patent should have been issued to Reading Iron Company, Incorporated, of Reading, Pennsylvania, as owner of the entire interest in said invention, as shown by the assignments of record in this oflice; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and scaled this 12th day of September, A. D., 1905.

[sEAL] F. I. ALLEN,

Commissioner of Patents.

JUI'FBCHOH In Leueis l'uwut IJO- 796,938.

It is hereby certified that Letters Patent No. 796,938, granted August 8. 1905, upon the application of George Schuhmann and James H. Matheson, of Reading, Pennsylvania, for an improvement in Making Lapweld 'lubingx" was erroneously issued to said "Schuhimmn and Matheson as owners of said invention; whereas the said Letters Patent should have been issued to [feuding ron Company, lncorpo ated, of Reading, Pennsylvania, as owner of H10 eniire intere t in Hlid invention, as shown by the assignments of record in this ufiicv: and that \he said Letters Patent should be read with this correction therein ihat lin' NHHP may uniform in the record of the case in \he Patent Ofiice.

Signed and seal d this 12th day 0| Npuanhur, A 1). 19ml [sliAL] F. I. ALLEN,

('ommissioner of Palenls.

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