US40587A - Improvement in tools for manufacturing knitting-burs - Google Patents

Description

NITED STATES PATENT OFFICE.,

HORAOE FISHER, OF WATERFORD, ASSIGNOR TO HIMSELF AND FULLER St SAFELY, OF COHOES, NEW YORK.

IMPROVEMENT IN TOOLS FOR MANUFACTURING KNlTTlNG-BURS.

Specification forming part of Letters Patent No. 40,587, dated November 10, 1863.

To all whom it may concern.-

Beit known that I, HORACE FISHER, of the town of Waterford, Saratoga county, State of New York, have invented a new and useful Tool to be Employed in Manufacturing Knitting-Burs5 and I declare the following specification, with the drawings forming part of it, to be a full and complete description of my lnvention.

Figures l, 2, and 3 represent the form and construction of a knitting-bur; Fig. 4, the tool for making the bur, and Fig. 5, a sectional View showing the construction and operation of the tool.

Similar letters in the different figures denote the same parts of the apparatus.

The knitting-bur is a welLknoWn part of the machinery of knitting-looms, employed in the formation of the stitch, and is constitutedas shownin Fig. l, of a small metal cylinder, A, prolonged into a neck, B, with an orice through its axis, through which, when on the maehine,a fixed axle runs, upon which it revolves'. It has a portion of its periphery turned down into a groove, so as to leave a low ange on both edges of the cylinder. Across the'cylinders face oblique slots a a are cut through Jdie flanges and also just dipping into the surface of the face between them. Into these slots are set wings of thin steel, which, when completed, are shaped like O, but

in the process of forming the bur are oblong,

as shown at D. These pieces are slipped into the slots, and are then fixed permanently therein by soldering. Then the apparatus is put into a lathe, and the edges of the Wings turned down from the form shown at D to that shown at O, the bur, when completed, appearing in profile as shown in Fig. 2, and edgewise as in Fig. 3. In doing this, as the metal is left soft to allow of this turning down, the wings will of necessity be bent more or less out of shape, so as to require after the turning a careful adj ustmcnt of them, in order to preserve their intervals true and surfaces flat and regular, an operation requiring very considerable expense of labor and time.

The object of my improvement is to save this expense, and consists, first, in the employment of win gs punched out of thin steel, and hardened, (instead 0f using soft metal,) of the proper form when complete, like C.

The Wings are inserted into the soldered to the cylinder. N ow, it is necessary that these wings should be placed in their relative positions with the greatest accuracy, for, being of hard metal, they cannot be rectified by turning or filing. My tool, the subject of this invention, is intended to perform this service, and is constructed as shown in Figs. 4 and 5. E is a metal spindle having at one end a head or button, G, a trie larger in diameter than the cylinder A, and on the other a screw-thread. A follower or collar is fitted to slide upon the neck B ofthe cylinder, being a cylinder, K, expanded at one end into a cup or flange, H, large enough in diameter to project beyond A, and by its concave or curved rim at b to fit accurately against the edges of the Wings. The follower, when in place, projects beyond the neck B, so that a nut, N, being screwed upon the end of E, by pressing upon the end of K, will force H firmly against the wings G, and press them home to their proper position upon the surface of A. It is manifest that being held firmly between the button G and the curved and fitting rim atb, the wings, if accurately made, must be held exactly in their true positions. It becomes then only necessary to slip the wings into their slots upon the cylinder, andA then applying the tool to screw up the nut, which at one operation will bring every wing toits true position in reference to the others without requiring a separate adjustment of each one. This done, the solder is applied and the bur is completed.

This tool, by performing at one prompt operation the placing of the Wings accurately and holding them in their places, dispenses with the process of turning down the Wings to shape and the adjustment of each wing separately, and thus permits the use of hardcned steel for the wings, instead of soft metal, combining the saving of time and labor in constructing the bur, with the use of a much more durable metal for the wings.

The tool can be used without the follower by drawing up the button G against A, by screwing the nut N against the end ofneck B. The Wings after insertion can then be driven up with a hammer against Gr, and so adjusted to their places, and may remain there during the slots a, to be process of soldering, provided each Wing fits its groove tightly; but this process., although button G, screw and nut N, With a follower,

a saving as compared With the old process, K, and collar H, substantially as described,

does not complete thework as advantageously and for the purposes set forth.

as does the use of the complete apparatus. HORACE FISHER.

VVhatI claim as my invention, and desire to Witnesses:

secure by Letters Patent, is E. J. MILLER,

The combination of a spindle, E, and its RICHD. VARICK DE WITT.

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