US320922A

US320922A - Draw-bench

Info

Publication number: US320922A
Authority: US
Publication date: 1885-06-30
Anticipated expiration: 1902-06-30

Description

J. J. FISHER.

DRAW BENCH.

(No Model.)

' Patented June 30, 1885.

Aharney NITED STATES PATENT OFFICE.

JOHN J. FISHER, OF CLEVELAND, OHIO.

DRAW-BENCH.

SPECIFICATION forming part of Letters Patent No. 320,922, dated June 30, 1885.

Application filed June 14, 1884.

T0 aZZ whom it may comcern:

Be it known that I, JOHN J. FIsHER, of Cleveland, county of Guyahoga, and State of Ohio, have invented a new and useful Improvement in Drawing Tubes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being made to the accompanying drawings, and to letters of reference marked thereon.

My invention relates to certain new and useful improvements in the manufacture of metal tubing or piping, and has for its object the providing of a set of three benches and drawchairs for making butt-welded pipe, either half-way with tongs or the whole way with bells, as may be required, thus doing away with the two-bench system now in general use and increasing correspondingly the capacity of the machine, as each operation, instead of being conducted separately, is performed in conjunction with another, so that more is accomplished in a given length of time and with the same amount of labor. These objects are attained by arranging two or more sets of draw frames or chairs before a furnace, instead of one, as is now done, and when the skelps are drawn through the bells and forming-tubes from the furnace, instead of being returned and drawn the second time through the same bell, they are shifted to the adjoining chair for the second operation of drawing. At the same time a new one is being drawn through the bell just left vacant by transfer of the first tube to the second chair, when both are drawn simultaneously. The first is then removed toathird bench or chair for the final operation, and thesecond takes its place, as before, a new one occupying the place of the second on the first bench, and so on indefinitely, whereby at least one-third more work is accomplished than in the onebench system hitherto in general use.

In the drawings herewith, Figure 1 is a top view or plan of a couple of draw benches or chairs constructed in the ordinary manner and placed conveniently in front of a furnace for heating the skelps or blanks out of which the tubes are formed. Fig. 2 is a side elevation (No model.)

of the same; Fig. 3, an end view, and Fig. 4 is a die-holder to be used, if required, in place of the bell in Fig. 3. In addition to these, there is a third bench similar to l and 2 for sizing and rounding the pipe to proper gage after welding. This is not shown, as'its construction is identical with the others. Instead of a third bench, a set of rolls may be used for rounding and sizing.

In the drawings, E is a stout frame or bench provided with friction-rolls F E. On top of these rolls is a chain, D, armed with suitable tongs or grip, c, for seizing and holding the skelp or pipe, the outer end being attached -to any suitable winding or drawing device. A is intended to represent the front of a suitable furnace for heating the skelps or blanks, from whence they are drawn out by the tongs a, passing on the way out through a funnelshaped bell, B, by which the skelps are rolled into tubes as they are drawn out by the agency of chain D and tongs c. As stated above, after being drawn out on one bench they are transferred to the other, where the drawing is completed, and then transferred to a third bench to be sized and rounded.

Now, what is new in this operation is providing a second draw-bench to be worked in conjunction with the first, substantially as stated, whereby the amount of work that may be accomplished by one set is greatly enlarged over the methods heretofore in use.

I claim, therefore- An improvement in draw-benches for the manufacture of tubes, the two dies of unequal size placed side by side upon the same bench in front of the furnace, together with the tongs and chains connected therewith, in virtue of which two tubes may be drawn at the same time, such tube being twice heated and twice drawn-first to weld and then to reduce-substantially as set forth.

This specification signed and witnessed this 18th day of May, 1883.

JOHN J. FISHER.

Witnesses:

GEO. O. TRACY, J AS. A. DOYLE.