US185345A - Improvement in knitting-machines - Google Patents

Description

JOHN H. MUSGROVE, OF STILIAVATER, ASSIGNOR OF PART OF HIS RIGHT TO JOHN OLUTE ANDGrEORGE CAMPBELL, OF GOHOES, NEW YORK.

IMPROVEMENT IN KNITTING-MACHINES.

Specification forming part of Letters Patent No. 185,345, dated December 12, 1876; application filed April 3, 1876.

To all whom it may concern Be it known that I, J onn H. MUSGROVE, of Stillwater, in the county of Saratoga and State of New York, have invented a Quarter-Saver for Rotary Knitting-Machines, of which the following is a specification:

The object of my invention is to prevent the disengagement of the knit web from the needles when the yarn is broken, by having the yarn pass over and in contact with two projections, midway between which, and resting upon the paying-in yarn, is a wire of a suitable gage, which is pivoted at its opposite end to a catch or pawl, which engages or holds an arm secured to a rocking shaft, to one end of which is secured a cam, which operates vertically immediately within the revolving nee-' dles. A delicate spring facilitates the downward action of the cam, while a shield extends farther inward beyond said cam, the lower edge of which is in a nearly horizontal line with the upper extremity of the needles. Said shield is applied for the purpose of preventing frictional contact of the revolving web with the cam when the yarn continues unbroken. WVhen the yarn breaks, the feeler-wire is let fall by the yarn, the catch is disengaged from the arm connected with the cam-shaft, permitting the cam to roll down on the web, carrying the same below the beards of the needles, which operation, of course, does not knit, but retains the old or previously-formed stitches in contact with the needles.

My device may be applied to any wellknown rotary knitting-machine, and is to be located between the landing and cast-0H burrs, and is intended to obviate the tedious and laborious operation of reapplying or readjusting the web to the needles, as has been usually necessary heretofore. It is simply and easily accomplished by the use of my device. The mere tension of the yarn, of course, sustains the pivoted wire or yarn-feeler, while the yarn remains unbroken.

To enable others skilled in the art to fully understand and construct the same, 1 will proceed to describe it as follows:

Similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of a portion of a rotary knittingframe, showing the position of my invention as applied thereto. Fig. 2 is a lateral elevation of my invention; and Fig. 3 is a side elevation of the loop-depressing cam used in my invention.

The arrows indicate the direction of motion of the several parts of the machine.

, A, Fig. 1, exhibits the needle-cylinder; B, the depresser-wheel for closing the needlebeards. 0 represents a standard, which supports my device. Said standard may be at tached or secured to any convenient portion of the knitting-machine, in order to have the working parts of my device located between the landing and cast-off burrs. The said standard should be so constructed as to admit of vertical and lateral adjustment. A cam, D, Fig. 3, is secured to a horizontal shaft, 6. Said shaft is fitted to turn or oscillate in suitable bearings affixed to the standardframe. The shaft 6 is securely driven through the hole 0 in the cam D. An arm,f, is also secured to the shaft 8, which engages with a catch, 9, afiixed or made a part of the osci1lat-. ing shaft h. A long wire, 6, of suitable thickness, is secured to the shaft of the catch g, and extends forward of, and in close proximity to, the sinker-burr, which receives the yarn from the bobbins, this end of the wire being supported in a nearly horizontal position by means of the tension of the yarn, which passes over two projections at a proper distance from each other, the wire being supported by the yarn-tension. The position of the wire is shown by dotted lines, when the same is supported by the yarn, as will be seen by reference to Fig. 1. It represents the yarn drawn from the bobbin. The dotted line mm, Fig. 3, shows the position of the upper portion of the needles with relation to the cam D when the latter is depressed. When the arm f is engaged with the catch 9 the cam D is, of course, turned upward above the line at m, Fig. 3, and then the cam D is above the upper portion of the needles. The shield L is provided to prevent the web or knit cloth from coming in contact with the cam D. A delicate spiral spring, m, is connected to a lateral arm secured to the shaft 0, the other end of the spring m being attached to some portion of the standardframe O as shownin Figs. 1 and'2. The spring m isappliedsimply to: keep the arm f in contact with the catch 9.

' An arm, mis also applied-to the shaft 0, which is designed to stop 'the'carn atthe proper point in its downward pressure upon the web. When the'yarn'k'is broken, the wire '11 is:let'

fall, the catch 9 is disengaged from' the arm 7 1 f, the spring m partially actuates the rock- 'ingmoveinent of the can) 1), while ther fric-V tional contact of the web with the cam acceler- V V ates its rocking motion and'downward pressuregupon thestitches, thereby retaining-the" previously-formed stitches on the needles, and r preventing the web from being 7 cast off alto getl1er,'as would be theresult were my inven- Vtion not applied to the knitting-machine. 0 'represents'the needles, and p the web orknit' cloth. All the various parts of my invention should be so constructed as to admit of the Vrequisiteadjustment, The wire '23 can be bent V r V r V to conform to any required position it is to occupy, an d'may be cut to the requiredlen gth,

in order to extend forward to the yarn-guide, V V

which, of course, is located in front of'the sinker-burr; 'T'hetwo projectionswhich support the yarn, as before referred to, may be attached to said yarn-guide.

7 It will be readily observed that the tension of the yarn, when unbroken, between the bob- 7 r bin and needles, sustains the end of the wire has above described; V r 7 Having thus described my invention, what I claiinas newgiand desire tosecure by Letters Patent, isas' follows: r r r The combination, with a drop-wire, i, of the 'shaft'h iotchedas' shown at 9, arm fleam 1), V V

shaft'e, and'spring m, operating as set forth. 1

JOHN MUSGROVE.

Witnesses:

J. W. LATCHER, V UiG WINNEY.

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