US2039209A - Stop motions of textile apparatus - Google Patents

Description

. A ril 28, 1936. 1. BLUM 2,039,209

V STOP MOTIONS OF TEXTILE APPARATUS Filed April 24, 1933 2 SheetsSheet 1 F29] [-79.3 179. A n d IB/um April 28, 1936. I. LUM 2,039,209

STOP MOTIONS OF TEXTILE APPARATUS Filed April 24, 1933 2 Sheets-Sheet 2 I. B/um Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE STOP 'MOTIONS OF TEXTILE APPARATUS Izchak Blum, Paris, France, assignor to Society Comptoir dApparells Textiles, Socit i'Responsabilit Limite, Riedisheim, near Mulhouse (Haut-Rhin), France Application-April 24,1933, Serial No. 667,721

In France May 26, 1932 1 Claim. (01. l39-268) ting the dropping of the blade to actuate the stop motion, mechanical, electrical or otherwise.

At present such blades, whether of the closed' or open type, are of flat and very thin metal and have formed therein an eye for the threading of the yarn. Figures 7, 8 and 9 of the annexed drawings show such a blade b, and are inserted by way of explanation-Figure 7 being a side view; Figure 8 an edge view; and Figure 9 a cross section. Thread eye a is cut in the metal to form an orifice in the plane thereof; 11 is the usual bar on which the blade drops on breakage of the yarn c, which supports such blade.

With the form of eye shown disadvantages have been recognized. The yam c in its passage through such'an eye makes two distinct bends with two changes of direction, with friction against the edges of the eye and the adjacent parts of the blade. This is clearly indicated in Figures 7 and 9. Further, when for example a group of warps is cut, the blades mounted on the warps are huddled together-see the schematic view in plan of Figure 10, which figure is also inserted by way of explanation-'and each warp, ,such as c for example, rubs not only on the edge of the eye of its own blade I: but also against the lateral edges of the adjacent blades b and b The total result ofthese frictional contacts of thread and blade is a scratching or even breakages of yarns, and moreover a large part of the sizing of warps is removed by the scraping contact, with consequent inconveniences and diiiiculties in the later manipulation of the yarns.

Finally, there is the disadvantage that the blade due to the operation, already explained in which a yarn enters and leaves the eyea, takes a. position which is oblique to'the yarn which supports it and also is oblique to the stop rod operated by the falling of the bladei ative positionof yarn, blade and stop rod prevents the blade from falling properly to perform its function when the yarn breaksr Theobject of the present invention is to provide means for the removal of the disadvantages enumerated abo"e, and in accordance with such invention the ade, instead of being flat at This relthe eye and thus compellinga yarn to twist as it goes-through the bladeeye, is itself distorted at the point where the eye is situated so that the yarn will pass in a straight line through the eye.

By such construction the friction of the thread a passing through the eye of the blade is lessened. For afull understanding of the invention two constructions of a blade according to such invention will now be described by way of example, reference being had to the drawings anm nexed hereto wherein:

Figure 1 is an elevation-looking from the side of a machine in which it is mounted-of a blade of the closed type constructed according to the present invention! 1 Figure 2 is a horizontal section taken through the yarn eye of Figure 1;

Figures 3 and 4 are views corresponding to Figures 1 and 2 respectively, but showing a blade of the open type, with the present invention apgo plied thereto:

Figure 5 is an edge view of part of a blade according to Figures 1 and 3;-and

Figure 6 shows in horizontal across section a group of blades constructed according to this in- 25 vention and mounted upon their yarns.

Figures 7 to 10 inclusive. are given as before stated merely by way of explanation of existing blades, and form no part of this description of the present invention. They will not be further 30 referred to;

Figure 11 is an elevation of a further embodiment of the invention in an open type blade;

Figure 12 is a fragmentary view on an enlarged scale of the eye of the blade shown in Figure 11; 3,

Figure 13 is a side view of the detail of Figure 12; and

Figure 14 is a view similar to that of Figure 11 but showing a blade of the closed type.

\ From an examination of Figuresl to 6 incluo sive of'the drawings it will be clear that the I eye a of the blade I is surrounded by a zone of which a part 2 is pushed forward and the other part 3 pushed in the opposite direction. The

parts 2 and S3 of the blade so deformed pro-g5 vide' bowed projections extending irom opposite faces of the blade, with the outer part of each projection forming a fiat surface parallel to the plane of the blade. The projections are flared outwardly toward the edges of the blade the blade 6 is viewed-Fiizure '5-an approxig

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