US184348A - Improvement in machines for pointing wire for sewing-machine needles - Google Patents

Description

w; H. DAYTON & J.'A.LLDIS.

MACHINES FOR POINTING WIRE FDR SEWING-MACHINE NEEDLES.

No.184,348, Patented Nov. 14, 1876 UNITED STATES PATENT OFFICE.

WILLIAM 'H. DAYTON AND JAMES ALLDIS, OF TORRINGTON, ASSIGNORS TO EXOELSIOR NEEDLE COMPANY, OF WOLOOTTVILLE, GONNEGTIO UT.

IMPROVEMENT IN MACHINES FOR POINTING WIRE FOR SEWING-MACHINE NEEDLES.

Specification forming part of Letters Patent No. 84,348, dated November 14, 1876; application filed September 4, 1876.

To all whom it may concern Be it known that we, WILLIAM H. DAYTON and JAMES ALLDIS, of Torrington, in the State of Connecticut, have invented an Improvement in Pointing Wire for Sewing-Machine Needles, 850., of which the following is a specification:

Sewing-machine needles for leather-work are usually made with the points flattened in the form of a straight aw], and the angles of the knife-edge are slightly removed.

The object of the present invention is to sharpen the needle-blanks, awls, or similar articles with rapidity and precision, so that the bevel or inclination may be equal at each side of the point, and the corner or angle of the knife-point may be slightly rounding.

In the drawing, Figure 1 is a plan of the machine employed by us. Fig. 2 is a section vertically at the line at :r. Fig. 3 is a cross section at y y. Fig. 4 is a side view, and Fig. 5 is an end view, of the needle in larger size.

The sewing-machine-needle blank is made with the shank a and needle portion b, as usual. These blanks are laid successively by hand or automatically upon the bed 0, with the end of the shank a in the groove of the screw-cylinder d, and with the needle-body b in the groove of the screw cylinder or roller d and these screws are geared together at Z and revolved, so as to carry the needles along beneath the belt a, that is endless and passes around the pulleys c, that are moved at such a speed that each needle will be revolved as it is moved along,in consequence of the shank being rolled .upon the bed 0, and while this movement is given to the needle its end comes into contact with the grinder at f, to slightly or partially round the point. The needleshank, awl, or similar article is then received between the endless belt e and a second endless belt or chain. g, around pulleys 9, so that the shank is firmly grasped between them, and it is preferable that the belt or chain g be made with'transverse recesses, into which the needle-shank a is received, and there is a bar, It, above the belt 6, upon which bar springs h act to press the belts together and clamp the shanks of the needles firmly while being carried along in contact with the grinders 7c and I, that act above and below the needle-point, to grind the same into a wedge shape, and the needleruns above a rest, by preference,while being acted upon by the grinder k, and below another while being ground by I, so that the points are made perfectly uniform, with an equal inclination at both sides, and with the corners slightly rounded.

The grinders f, k, and l are shown as wheels. They may be of any suitable material, such as emery, or they may be of steel, with file-surfaces, or reciprocating files may be employed, if desired.

We claim as our invention- The chain or belt g, in combination with the belt 0, presserbar h, and files or grinders k l,

substantially as set forth.

Signed by us this 28th day of August, A. D. 1876. 1

WILLIAM H. DAYTON. JAMES ALLDIS.

Witnesses:

CHAS. L. McNEIL, JOHN H. WADHAMs.

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