US260655A - Machine for swaging needle-blanks - Google Patents

Description

(No Model.) g

' J. H. BULLARD.

MACHINE POR SWAGING NEEDLE BLANKS. No. 260,655. y Patente-d July 4,1882.

v UNITED- STATES PATENT OFFICE..

JAMES n. BULLAED, oF SPRINGFIELD, MASSACHUSETTS.

vMACHINE FOR SWAGING NEEDLEG'BLANKS.

SPECIFICATION forming part ef Lettere Patent No. 260,655, dated .my 4, 1882.

Application sied August 1o, issn.

To all whom it may concern:

Be it known that I. JAMES H. BULLARD, of Springfield, in the county of Hampden and State of Massachusetts, have invented a new and useful Improved Machine for Forming Needles, of which the following is a specification and description.

The object of my invention is to give the approximate form to sewing-machine and other needles by subjecting the wire from which they are made to a rapid succession of compressions between two dies while the wire or blank is being rapidly revolved by a chuck or holder; and I accomplish this by the mechanism substantially as hereinafter described,andV

illustrated in the accompanying drawings, in which- FigureI is` a front view of a compressingmachine, made according to my invention with knuckle-bars, as 1 and 2, the former'bein g pivoted, at its upper end, to the upper part of the frame or to a piece, as 10, secured therein, and the other knuckle-bar 2 pivoted,fat its lower end, toa plunger, as 5, containinga die, as 7, said plunger being movable between two guideplates, as 6 5 and the die 8 is secured in arm position in a stationary block, as a, properly Secured in the machine, preferably between two plates, as 9, bolted to the front and back of the machine, with an adjusting screw, as B, turned up through the lower end of the machine and against said block a, by which means the `die 8 may be adjusted up or down by loosening the plates 9, turning the screw B either up or down, with the block crestin g thereon, and then tightening the plates 9 against the block a when the vertical adjustment is completed.

The carriage-way 20 is bolted to the front of the frame, and on this is arran ged,to slide freely (No model.)

toward and from, the frame, the carriage 11, with a spindlechuck,'as 23, having jaws, as 13, at one end, into or between which the wire or blank is inserted and held while being formed or compressed. This spindle is provided with a small pulley, as 14, to receive a cord or band to cause the spindle and jaws to revolve rapidly, and the jaws 13 may be opened and closed by a screw, as 22, turned into the rear end of. the spindle and operatingthe jaws.

In order that the carriage 11 may move automatically toward the dies 7 and 8 a shaft, as 17, is made to revolve in suitable bearings in the carriage-way, the shaft lying at right angles to the track on which the carriage moves and havingan arm, as 18, attached to said shaft, and a cord and weight, as 19, attached to said arm, and with a toothed wheel or pinion, 16, secured to said shaft and engaging with a rack made upon or attached to the lower side of the carriage 11, as shown clearly in dotted lines in Fig. II.

VIf the end of the cord` is secured to the calnshaft, or to the cam itself near theshaft, and

extends over the cam, with aweightsuspended at the free end of the cord, when the cam extends toward the dies the weight will pull harder to revolve the shaft and move the clutch toward the dies than it will when the cam extends in a vertical direction, and if, when the cam extends toward the dies the needle-blankalready placed in the chuck-is brought up to the dies, the weight will exert its greatest force on the shaft and feeding-carriage through the medium of the cam to force the blank in betw'een'the dies, and after it has passed in and the needle has been formed the cam will then have moved down into a position such that the weight will exert" little force upon it to force the needle-blank any farther in between the dies.

Instead of the weight being attached to a cord and the latter passing over the cam, the weight may be suspended directly from the cam, and the result will be precisely the same. The.' adjustment of the forming-dies 7 and Sis such that the axis ofthe matrix formed by them, which 'gives the desired form to the needle when the dies are brought together, and the axis of the holdingjaws 13 coincide, so that when a blank is placed in the jaws and held asA IOO

between the dies 7 and 8, and the spindle| chuck and needle-blank are revolved rapidly, the blank will be uniformly compressed at all points toward its axis by the rapid vertical movement ot' the movable die in the plunger', this die making two movements or compressions against the needle at each revolution of the crank-shaft.

It is evidentI that the carriage l1 may be moved toward and from the dies by the hand placed on the hand-wheel 15, by which the screw 22is turned in and out, and without using the autolnatic feeding mechanism, if desired; but by using the feeding mechanism two machines, placed sideby side, may be attended to by one operator, who in that case will only be required to pull back the carriage after one needle is formed, remove the latter from the jaws, and insert another blank, leaving the 2o carriage and chuck to move up itself' while the blank is held therein.

Having thus described my invention, what I cla-im as newis- In a needle-forming machine, the combination of two compressingdies, one fixed and the other movable, between suitable guideways or plates, and actuated by a crank and a pitman pivoted to two knuckle-bars toggled t0- gether, one ot' which bars is connected t0 a fixed pivot and the other to a plunger carrying said movable die, a revolving chuck or holder for holding and revolving the needle between said dies while being formed, and a movable carriage provided with a rack engaging with a revolving pinion actuated by an arm and a weight attached thereto, substantially as described.

JAMES H. BULLARI).

Witnesses:

T. A. CURTIS, OHAs. H. Woon.

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