`J. M. CLARK. . l MANUFMTU'RE oF oRN-AMEN‘TAL TUBING. 110.174,11?. Y . 'Patented Feb. 29,1376., UNITED STATES PATENT OFFICE.
JAMES M. CLARK, OF JERSEY CITY, NEW JERSEY. IMPROVEMENNT‘IN THE MANUFACTURE‘OF ÓRNAMENTAL TUBING.`
Specìñcation forming part of Letters Patent No. 174,117., dated February 29, 1876; application tiled February 3, 1876.
. To all whom it may concern: the angle of the inclination of the grooves is Be it known that I, JAMES M. CLARK, of the reverse. Jersey City, in the county of Hudson and State The thin sheet-metal tube is inserted through ot' New Jersey, have invented an Improve »this die a upon the draw bench, and pulled nient in the Manufacture of Ornamental Tub through such die. Either the tube or the die ing, of which the following is a specification: `must be allowed to .revolve in consequence Ornamental tubing for pencil-cases has been ofthe screw form ofthe grooves. This op made with grooves and ribs similar to a three, eration iinparts to the tube the form shown four, orv more threaded screw, and this orna in'Fig. 2, and it is to be understood that a ~1nentati`on has been done by a draw-plate die tube in the form shown in Fig. 2 has before properly shaped, and ra spiral or twist man been made, and l do not claim the same. ' drel upon which the tubeihas been placed. The‘tube is to be run through the second Tubes and pencil ~ cases have been orna draw-plate die b, in which the grooves ‘stand mented by an engraved figure put upon 'the at the opposite angle, the result of' which `is same byan engraving-engine, such tigure be that the first ribs are crossed by a second set ing composed of ranges of ‘diamond forms in ot' grooves that divide such ribs into quad -relieñ This operation is tedious and- expen» rangular or diainondshaped projections, pro sive’for labor, and can only be done upon a ducing a tigure somewhat similar to the fig case that issufticiently thick 5 hence with gold ure known as the “ barley-corn77 in engine-en and silver such cases are costly. graved work, but the figure is bent iu the thin By my improvement I am enabled to employ sheet metal instead of being engraved. The very thin sheet metal, and render the tube bending operation will be most perfect after stiffer than a plain tube, and at the saine time the tube has been passed through the’iirstdie to ornament the tube in a much less time than as a third operation, and then again through . by engraving, 4without loss of material, and the second dies, asa fourth opera-tion, or else to produce a series of quadrangular or dia- two other dies similar to the tìrst and second, mond-shaped figures in relief, that are very but slìgh tly smaller,inay beemployed for the handsome. ’ third and fourth operations. In the drawing, Figure 1 represents the tube The grooves and ribs may be rounding sec in a finished condition. Fig. 2 represents the tionally, or with angular faces, according to tube after the iirst operation. Fig. 3 is a sec the shape of the barely-corn projections to be tion of the draw-plate die for performing the formed. ` ñrst operation, and Fig. 4 is a similar view of I claim as my in vention- l the draw-plate die for performing the second 1. The method herein specified, of orna or iinishin g operation. i mentin g tubing, by drawing the saine succes The dies a and b are ot' the proper size for sively through two dies grooved spira’lly in op-„f‘“ " " `making the ornamentations upon the tube. posite directions, substantially as set forth.,` One die, a, is provided with ribs and grooves 2. The ornamental tubing with the quad upon its inner tapering surface that incline to rangular or barley-corn projections, bent in `” the axis in one direction, and the other die, b, the thin metal of such tubing, as a new arti is'made with ribs and grooves upon its inner cle of manufacture. ‘ tapering surface,»inclining in the opposite di Signed by me this 1st day February, A.D. rection. These grooves are preferably made 1876. . by a tapering punch, such as shown in Fig. 5, which punch is pressed into the die while the JAS. M. CLARK. latter isin asoft condition. The die is also to Witnesses: be tiled up, and the edges properly rounded. GEO. T. PINCKNEY, The punch for the second die is similar, but CEAS. H. SMITH.