US1668435A - Yarn stop motion - Google Patents

Description

May 1, 1928. 1,668,435

G. A. URLAUB YARN STOP MOT-ION Fi led Feb. 4. 1925 IHVENTOR Ge 02: 4 17. Ur'lauz @7113 atwrneys Fig.5. 74 WWW Patented May 1,1928.

PATENT OFFICE.

GEORGE ADAM URLAU B, 0F BAYONNE, NEW JERSEY.

" YARN STOP MOTION.

Application filed February-4, 1925. Serial No. 6,772.

My invention relates to stop .motions for knitting and weaving machines and more particularly to-such machines adapted to use a plurality of yarns or threads. One ob- 6 ject of my invention is to provide. a construction which will keep reasonably free from accumulation of lint and can be easily cleaned. AnOtherobject is to provide a construction in which any of the drops for the arns can readily'be taken out of action whi e the others are left in operative position. Another object of my invention 1s to provide a simple and efiicient stop motion device adapted for use where there are a multiplicity of yarns in a small space.

In the accompanying drawings I have illustrated my invention applied to a warp knitting machine, but it will be'understood that it is applicable to any knitting, weaving, winding or spinning machine.

In the drawings Fig. 1 is an end elevation of the upper portion of a warp knitting machine with my stop motion attached;

Fig. 2 is a sectional elevation on a larger scale of one unit of my device with certain modifications;

Figs. 3 and 4; are elevations of a modified form of drop in the out-of-action and cleanin positions respectively; 1

Iigs. 5 and 6 are-side elevations showing the three tier and single tier arrangements of the drops; while Fl .7 fied orm of tip for the drops. v

.In the type of stop motion to which this invention'relates, each individual yarn- (and when I speak of am I includeboth yarn and thread)'-is t readed through its own individual drop which is arranged to close an electric circuit or actuate some other means. adapted to stop the machine when released by breaking of the yarn.

When my invention is applied to a warp knitting machine there .is a row of actuating drops 10 for each warp and in the row an individual drop for each warp end or am 12. The yarns from one or more warp heams 13 can be threaded to the same row of drops and the drops can, if 'desired, be of,'such lengths as willpermit warps which lie'in'rows near each other being threaded on them. In the drawings I have shown the warp ends assembled in two rows, one on and 8 are detail views'of a modieach side of the longitudinal center line of the machine and one row of drops for each warp thus assembled.

I Each drop 10 is preferably in the form of a small fiat bar having an opening 14 at its upper end through which one of the yarns 12 can be threaded. The opening 14 may be merely a tapered hole as shown in Fig. 3 or it may have a glazed porcelain lining 15 as in Figs. 7 and 8, thus at the same time protecting against wear and insulating the dropl from the yarnelectrostatically. T ese actuating drops are mounted on the frame of the machine in the novel manner now to be described. A frame completely enclosing the drops in each row except for theirupper ends, affords said dro s free slidingsupport at an angle from t e vertical. In the example shownin the drawings this frame is composed of a frame proper 16 and a back plate 17. The frame proper 16 is an inverted U shaped metal strip with a brace -18 separating the upper part of the inverted U from the lower. The top of the U strip and the brace 18 are slotted to receive the drops. The frame proper is mounted above but insulated from a metal back plate 17 which plate can be removed.

One of the novel features of my device is the shoulders for putting any individual drop out of action, either when the particular yarn on which it is threaded is not needed .for the time being, or for purposes of cleaning. For this pur ose I prefer to make these shoulders in the form of two notches in the lower edge of the drop, one near the lower end and one neartheupper end. The notch 20 near the lower end 15 so positioned that when the drop has a yarn held out of action without necessitating its entire removal, although it is perfectly feasible to remove any individual drop by pulling it upwards entirely out of the frame,

if this is found desirable, or if the individual drop has to be replaced for any reason.

I have found, however, that when it is desired to clean the machine from accumulation of lint etc'., it takes some little time to separately lift each individual drop to this raised out-of-action position, and therefore provide another set of out-of-action or cleaning notches 21 which normally lie above the top of the frame, by which all the drops can be put and held out of action together when the yarns are taken out of them. When the yarns are removed and the machine is to be cleaned the back plate 17 is removed in any suitable manner as for instance by sliding it out from under the insulation 25 (Fig. 2). The drops will then slide down till the notches 21 catch on the frame and hold the drops. This position is shown in Fig. 4. When in this position, the individual drops are conveniently located for rethreading new yarns through them.

If it is desired to make use of the backplate as a means of showing all the drops up to operative position simultaneously, the back plate can be fastened to the insulation 25 by a hinge 27 at its lower edge, and swung up into position and held there by latch 26all as shown in Fig. 2. The notch 21 is tapered on its lower shoulder to permit this being done without handling the. indi-;

vidual drops. When the back plate is mounted in this manner its ends will not extend over the frame of the machine but will lie between the frame. The slots in the frame proper are just deep enough to take the full depth of the drops, thus preventing the entrance of lint. If-any lint does get through the slot it will be prevented from reaching the back plate by the slotted brace.

In some types of machines the yarns will vibrate and change their tension somewhat and sometimes tend to jerk the drops upward. This jerking might occasionally lift the drops so high that the out-of-action notches-20 would fall into engagement with the brace 18 and be inoperative. For the purpose of preventing this accidental jerkmg out of action and without hindering intentional removal of the drop from the frame, a shoulder 22 is cut in the under edge of the drop just above the out-of-action notch 20, (see Fig. 2). This shoulder is ta- 'pered toward the upper end of the drop but provides an abutment which hits against the race 18 when the drop is jerked up thus permitting the drop to fallback to normal. If desired this safety shoulder can be combined with the cleaning notch 21 toform a long notch 23 as shown in Figs. 3 and 4.

It will be observed that in my device the drop can be made of any'flat sheet material and as small and light as desired, thus ensibling a number of drops to be placed close toget er as shown in Fig. 6. However, in

some knitting and weaving machines, such for instance as the warp knitting machine illustrated in Fig. 1, there are a great many yarns close together and in such a construction the drops of a row can be placed in staggered relation, one above the other in several tiers, as shown in Figs. 1, 2 and 5. By placing these drops in this position it is possible to control all the yarns which are ever found in one machine without in any way increasing the number of elements in the stop motion other than actual drops themselves. In this formation I have shown the drops of the tiers made of different lengths in order to have them all operate on yarns in the same row, but if it is desired to have the drops all of the same size, the yarns can be led past the points of the drops at right angles thereto or the yarns can be spaced apart in several rows. However it is essential that the drops themselves be at an angle from the vertical in order to permit proper functioning of the notches.

I prefer to employ my stop motion as an electrical device by connecting the frame proper 16 as one terminal in an electrical circuit 24 and by connecting the back plate 17 as the other terminal of the circuit. In the drawings I have shown the frame 16 and the drops insulated from the frame of the machine bythe insulation 25. The electri-. cal circuit can include any suitable means designed to open the circuit, such for instance as a solenoid 26 adapted to break the power circuit as shown in Fig. 1. When a solenoid is used I have found it advisable to have this solenoid open the stop motion circuit 24 after the power circuit has been opened in order that the current in the stop motion circuit may cease to flow as soon as it has done its work.

When a yarn breaks, the stop motion operates in the usual manner by the particular I drop sliding down until it contacts with the back plate 17 as shown in Fig- 2, thus completing the circuit between the frame 16 of the stop motion and the back plate 17, and causing the power to be shut off. i

For examples of other uses to which my invention can be put I mention lace attach- Ill ments, full fashioned hosiery machines,

winding andwarping machines, etc. though I do not limit myself to these applications.

Many modifications from the example described will occur to those skilled in the art without departing from the scope of my invention.

' What I claim is:

1. In a yarn stop motion, a frame in combination with an actuating drop slidingly supported in said frame at an angle from the vertical. said drop being adapted to be put and held out of action by engagement with said frame.

2. An actuating drop for a yarn stop mo tion, comprising a flat bar'having an open ing at its upper end through which a yarn can be threaded, and an edge on which the drop is adapted to slide, said edge having a shoulder therein adapted to hold said drop outof action, substantially as described.

3. A multiple yarn stop motion having actuating drops each with ashoulder thereon, in combination with a frame completely enclosing said drops except for the upper ends thereof and holding said drops at an angle from the vertical, the shoulders on the drops being adapted to hold the drops out of action when enga ed with said frame, substantially as described.

4. A multiple yarn stop motion having actuating drops each adapted to be threaded on a yarn at its upper end, and a frame enclosing all of said drops except their threaded ends and supporting them inslots at an angle from the vertical each drop having a notch adapted to engage the frame and holdthe drop out of action when the latter is lifted above its normal operative position, substantially as described.

5. A multiple yarn stop motion having actuating drops mounted at an angle from the vertical, in combination with a frame completely enclosing said drops except for the upper ends thereof, said drops being removable but each having a shoulder adapted to prevent accidental jerking out ofv action substantially as described.

6. A multiple yarn stop motion having actuating drops each adapted to be threaded on a yarn at its upper end,in "combination with a frame-supporting said drops at an angle from the vertica1,'eachdrop having a notch adapted to engagethe frame and hold the dro out of action when the latter is lifted a ove its normal operative position,

said drops being removable but each havfrom operative position, and an electric circuit having stop means therein and having said frame and back plate as terminals.

8. A multiple yarn stop motion having a frame and removable back plate below said frame, in combination with an electric circuit having said frame and back plate as terminals, and actuating drops supported in said frame at an angle from the vertical but freelytremovable therefrom, said drops having notches therein adapted to en age said frame and prevent the drops fa ling out when the back plate is removed; all substantially as described.

In testimony whereof I have signed my name to this specification.

GEORGE ADAM URLAUB.

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