US404230A - Straight-knitting machine - Google Patents

Description

(No Model.)

R. W. SCOTT & L. N. D. WILLIAMS.

' STRAIGHT KNITTING MAGHINE.

No. 404,230. Patented May 28, 1889.

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UNITED STATES PATENT OFFICE.

ROBERT SCOTT AND LOUIS N. D. IVILLIAMS, OF PHILADELPHIA, PENNSYLVANIA.

STRAIGHT-KNITTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 404,230, dated May 28, 1889.

Application filed August 24, 1888. Serial No. 283,650. (No model.)

To all whom it may concern.-

Be it known that we, ROBERT XV. SCOTT and Lows N. D. WILLIAMS, both citizens of the United States, and residents of Philadelphia, Pennsylvania, have invented certain Improvements in Straight Knitting Machines, of which the following is a specification.

Our invention consists of an improvement in that class of knitting-machines having one or more fixed needle-beds, one or more movable cam-boxesfor operating the needles, and a fric tionally-operated yarn-guide carrier, and stops whereby the movement of said carrier is governed, so as to determine the number of needles to which the yarn is applied, the 0bj ects of our improvements being to insure the proper application of the yarn to the end needles of the acting set, and to insure the proper movement of the yarn-guide carrier in respect to the cam box or boxes. These objects we attain in the manner hereinafter set forth, reference being had to the accompany ing drawings, in which- Figures 1 and 1 are side views of sufficient of a knitting-machine of the character described to illustrate our improvements; Fig. 2, an enlarged view of part of the machine with the parts in a different position, and Fig.

3 a View showing a modification.

A represents the needle-bed, and B a cambox traveling across the needle-bed and having cams for operating the needles :0 of the same, and the machine may have but one of these needle-beds and cam-boxes, or the ma chine may be duplex, having opposite needlebeds and cam-boxes, the latter being connected for simultaneous operation and the needles on one side being actuated when the cam-boxes are moved in one direction, and the needles on the other side when said camboxes are moved in the opposite direction.

Although all the needles of each needle-bed are advanced and retracted, fabric of less width than the entire number of needles can be produced by limiting the travel of the guide D, whereby the yarn is fed to the needles; hence, if means are provided for increasin g or diminishing the extent of travel of said yarn-guide during the operation of the machine, the web produced can be widened or narrowed, as desired.

The guide D is carried by a bar, F, which is adapted to bearings a upon the cam-box frame B, so that the guide-bar moves with said frame so long as it meets with no undue resistance, the bearings being free to slide on the bar, however, when the movement of the latter is obstructed.

At each end of the table or b'ench carrying the needle-bed A is a screw-shaft, I, having at the outer end a suitable notched wheel, I, whereby it may be readily manipulated, and to this screw-shaft is adapted a nut, J, from which projects an arm, I), having a stud, f, acting as a stop for the end of the guide-bar F. It will therefore be seen that by manipulating the screw-shafts I the stops f may be adjusted from or toward the needle-bed, so as to stop the movement of the bar F in either direction when its guide reaches the end of the set of needles on which stitches are to be formed, the stops being slightly retracted when new needles are to receive stitches, so as to permit a little farther travel of the guide and the laying of the thread on the new needles, and on the contrary the stops being advanced when it is desired to restrict the travel of the guide.

Each stop-stud has, in the present instance, a projecting pin, 2', and each end of the guidebar F is made tubular and provided with a cam-slot for engagement with said projecting pin, so that as the bar reaches the limit of'its movement in either direction it is caused to rock slightly in its bearings, so as to shift the thread-guide and cause it to carry the thread to the outside of the line of needles 011 which the stitches are being formed, so as to insure the application of the thread to the last needle of the set.

The cam-slot may, if desired, be formed in a hollow stop-stud, the bar F being provided with a projecting pin, 7;, for engagement with said cam-slot, as shown in Fig. 3.

In order that there may be a proper dwell of the guide at each end of its traverse while the needle-operating cams are advancing to a proper position in respect to the guide, each of the arms I) b has a projecting finger, m, with catch m for engagement with a lug, n, on the guide-bar when the latter reaches the limit of its movement in either direction, the

catch retaining its hold upon the lug until the finger m is tripped by engagement of a nrojection, 1), on the frame 13' with an antii'rietion-roller, 1), at the outer end of thefingel.

As shown, the machine is constructed for widening and narrowing at each end of the needle-bed; but it will be evident that a fixed stop for the guide-rod maybe provided at one end of the machine when the widening or narrowing is to be at one end only, and it will also be evident that the stop mechanism may be used in connection with a friction guidebar common to anumber of machines.

Having thus described our invention, we claim and desire to secure by Letters Patent 11. The combination of the needle-bed and its needles, a cam-slide for actuating theneedles, a frictionally operated l'OCk-bftl carrying the 1hread-guide, a stop l'orlimiting the lllOVP ment of said bar, and a cam whereby, as it fLlI)])l?OLChOS the end of its movement, the guide-bar is rocked in its bearings, so as to slightly shift the guide, all substantially as specified.

2. The combination of the needle-bed and its needles the cam-slide for actuating the needles, the '1": rictionallymperated guide-bar, a stop for limiting the movement of the same, a catch for retaining the bar, and means for tripping said catch, so as to release the bar, all substantially as specified.

In testimony whereof we have signed. our names to this specification, in the presence of two subscribing witnesses.

lrtOllER'l 'W. SCOTT. LOUIS 'N'. l). \Vlhlll'AMS. Witnesses:

Eonmn'o M. 1h Jim, I I ARRY SM r1 1 1'.

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