US2857732A

US2857732A - Rings of textile ring spinning, doubling and twisting machines

Info

Publication number: US2857732A
Application number: US500061A
Authority: US
Inventors: Grishin Peter Fedorovich
Original assignee: TMM Research Ltd
Current assignee: TMM Research Ltd
Priority date: 1955-04-06
Filing date: 1955-04-06
Publication date: 1958-10-28
Anticipated expiration: 1975-10-28

Description

Oct.28, 1958' P. F. GRISHIN 7 2,857,732 RINGS OF TEXTILE RING SPINNING, DOUBLINGVAND 'rwxs'rmc MACHINES Filed April 6, 1955 United States Patent RINGS OF TEXTILE RING SPINNING, DOUBLING AND TWISTING MACHINES Peter Fedorovich Grishin, Dorchester, Mass., assignor to T. M. M. (Research) Limited, Hartford Works, Lancashire, England Application April 6, 1955, Serial No. 500,061 (Filed under Rule 47(b) and 35 U. S. C. 118) 4 Claims. (Cl. 57-119) The invention has for its object to provide an improved form of ring for use in textile ring spinning, doubling and twisting machines which will avoid certain disadvantages of existing forms of ring, particularly when these are used in the production of large packages entailing high traveller speeds and long traverse of the rings in relation to the spindles. The cross-sectional shape of a spinning ring is governed largely by the shape of the traveler to be used in connection therewith. Elliptical travellers have hitherto suffered some unpopularity on account of the unduly high incidence of end breakages which have resulted from their use, a defect which we attribute mainly to the trapping of the yarn or thread between the traveller and the ring. When a circular or nearly circular traveller is employed, the risk of trapping is reduced because the bow, i. e. the part of the traveller through which the yarn or thread passes, is of greater radius than in the case of an elliptical traveller. From some points of view the shape of an elliptical traveller is however, better adapted than that of the conventional circular traveller for optimum contact with the ring surfaces, and the improved form of ring proposed by the present invention is such that where used in conjunction with an elliptical traveller very long traveller life is obtained even when spinning under the most severe conditions.

In a spinning ring as characterised by this invention, the upper surface of the flange which constitutes a guide for the traveller is made substantially fiat, and with an inner bearing surface approximating to the cooperating inner radius of the bow of the traveller and an arcuate crosssection dimension such that in operation the end of the traveller does not make contact with the ring.

An embodiment of the invention is hereinafter described with reference to the accompanying drawings, of

which Fig. l is a large-scale sectional fragment of an improved spinning ring incorporating the features of the invention, and Fig. 2 is a grossly enlarged diagrammatic view illustrating the position occupied by the traveller upon the ring during spinning.

The ring shown in the drawings may have a web-portion A of substantially conventional form, provided with a shoulder B which is arranged to rest upon the upper face of the ring rail C, and having a flange D which is flat, or nearly flat, on its upper surface DA. The preferred form of traveller for use with such a ring is elliptical, as shown at E in Fig. 2, and it will be'seen that the inner bearing surface of the ring at DB approximates to the radius of the bow-portion EA of the traveller. In a preferred form, the radius of said inner bearing surface DB is from 75 to 85 percent of the radius of the working surface EA of the The said surface DB preferably intersects the traveller. surface DA in a circular line to form a relatively abrupt edge; that is to say, the inner edge of the surface DA is "ice not radiused as is the outer edge thereof. By this arrangement it is possible to avoid the tendency of the thread to become trapped between the ring and the traveller, thus minimising thread breakages and increasing production.

The positions respectively occupied by the yarn when spinning at the top of the chase and at the bottom of the chase are indicated at F and FA. In the position F the yarn approaches most closely to the inner bearing surface of the ring, but it will be seen from Fig. 2 that the parts are so shaped as to prevent trapping of the yarn between the ring and the traveller. The large area of contact between the ring and the traveller over the surface DB is suflicient to ensure that the load is so well distributed as to permit smooth running and improved cooling of the traveller. A further advantage accruing to the said improved arrangement is that the attitude of the traveller relative to the ring remains substantially constant throughout the build of a package.

It is preferable that the undersurface DC of the flange D of the ring should be made substantially horizontal in order to avoid contact between said surface and the end EB of the traveller. The consequent absence of frictional contact at this point and the improved cooling conditions so afforded avoid burning of the traveller, since the whole area of contact thereof is distributed over the inner bearing surface DB as hereinbefore described. The parallelism of the surfaces DA and DC is also advantageous in that it provides optimum contact between the ring and the traveller, even when the former is worn in service. The undersurface DD may also conveniently be made substantially horizontal, but this is not essential, as there is an appreciable degree of clearance between this surface and the end EC of the traveller.

Another desideratum in the improved ring is the provision of adequate clearance between the ends EB, EC of the traveller and the web A of the ring.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a textile spinning, doubling or twisting machine, the combination with a traveller, of .a ring having a flange formed with a substantially flat upper surface, the inner bearing surface of such flange being shaped so as to approximate the cooperating inner radius of the bow of the traveller, said inner bearing surface intersecting the flat upper surface in a circular line to form a relatively abrupt edge in such manner that at said intersection line the clearance between said inner surface and the adjacent surface of the traveller, when in operation, is less than the thread diameter, and the arcuate cross-sectional dimension of such inner bearing surface being such that the end of the traveller does not make contact with the ring.

2. A structure according to claim 1, and wherein the flange includes a pair of undersurfaces one or both of which are horizontal.

3. A structure according to claim 1, in which the flat upper surface and the inner under surface of the flange are parallel to each other.

4. In a textile spinning, doubling or twisting machine, the combination with a traveler, of a spinning ring having a flange with a substantially fiat upper surface and an inner bearing surface, the cross-sectional radius of which is not less than percent of the radius of the working surface of the traveller, said inner bearing surface intersecting said substantially flat upper surface in a circular line to form a relatively abrupt edge, whereby, in operation, the clearance between said inner bearing surface and the adjacent surface of the traveller at any point on said interthat the innermost end of the traveller does not make contact with the ring.

References Cited in the file of this patent UNITED STKTES PATENTS 173,585 carton r Feb-515, 1876 4 Tatham Mar. 8, 1887 Drama July 17, 1894 Foster Nov. 23, 1897 McLeod July 28, 1936 Roatta Mar. 8, 1949 FOREIGN PATENTS Great Britain Jan. 9, 1935 Germany Apr. 30, 1953