US2964805A

US2964805A - Stahlecker

Info

Publication number: US2964805A
Authority: US
Priority date: 1956-10-04
Publication date: 1960-12-20
Anticipated expiration: 1977-12-20
Also published as: FR1183927A; GB835954A; DE1060753B

Description

Dec. 20, 1960 F. STAHLECKER DRAWING MECHANISM FOR SPINNING MACHINES Filed 001;. 4, 1957 z m w w FRITZ s74; ECKER 3r out Arr-021v: Y5

United States Patent DRAWING MECHANISM FOR SPINNING MACHINES Fritz Stahlecker, Uberkingen, Germany, assignor to Wurtt. Spindelfabrik G.m.b.H., Sussen, Wurttemberg, Germany Filed Oct. 4, 1957, Ser. No. 688,245

Claims priority, application Germany Oct. 4, 1956 5 Claims. (Cl. 19-131) The present invention relates to draw frames for spinning machines, and more particularly to improvements in the upper pressure rollers and the cages for the upper belts thereof.

The cages for the upper belts of draw frames are usually mounted on the twin rollers either alone or in pairs connected by a connecting web. The individual cages are usually of a more simple construction and more easily manufactured than the double cages which are connected by a web. Furthermore, the double cages are also dependent upon the spindle spacing and must therefore be made of various dimensions. Their manufacture becomes expensive because each cage spacing requires separate tools. The belts of the cages which are connected to each other by a web also do not adapt themselves as well to their respective lower belts as the upper belts of the individual cages which are able to carry 7 out small movements independently of each other. On the other hand, the cages which are connected to each other by a web are often more easily manipulated than the individual cages, particularly when they are installed in the draw frame. This is true particularly if the cages are used in draw frames with loading elements which may be raised or tilted upwardly.

It is an object of the present invention to provide a cage of a new design which combines the advantages of both types of cages without retaining the disadvantages thereof.

An essential feature of this new cage design is the fact that the two individual cages which are movably mounted on the shaft of the twin roller are loosely coupled to each other by the shaft or by one or more connecting members on the shaft. The individual cages thus mounted on the shaft may carry out small rotary movements independently of each other about the shaft of the pressure roller. This small movability of the cages permits the upper belts to adapt themselves properly to the lower belts. Furthermore, the loosely coupled individual cages may be manipulated within the draw frame just as easily as double cages.

Further objects, features, and advantages of the present invention will be apparent from the following detailed description thereof, particularly when read with reference to the accompanying drawings, in which-- Fig. 1 illustrates a side view of a twin roller with individual cages according to the invention;

Fig. 2 illustrates a plan view, partly in cross section, of the twin roller according to Fig. 1 with two individual cages;

Fig. 3 illustrates a side view of the twin roller as shown in Figs. 1 and 2 with individual cages installed in the loading saddle;

Fig 4 illustrates a side view, partly in cross section, of a twin roller with individual cages and an intermediate connecting member;

'Fig. 5 illustrates a plan view of the twin roller and the cages according to Fig. 4;

2,964,805 Patented Dec. 20, 1960 Fig. 6 illustrates a side view, partly in cross section, .of a pressure roller with individual cages and a connecting member according to Figs. 4 and 5 installed in a loading saddle;

Fig. 7 illustrates a perspective view of the intermediate connecting member as shown in Figs. 4 and 5 but removed from the shaft; while Fig. 8 illustrates a perspective view of two associated intermediate elements.

Referring to the drawings, and first particularly to Figs. 1 and 2, the individual cages 1 and 2 of the twin rollers are loosely mounted on a shaft 3 while the pressure rollers 4 and 5 are rotatably mounted on shaft 3. Each projecting end 6 and 7 of shaft 3 is provided with flat surfaces 8 and 9 which are loosely embraced by the respective cage 1 or 2 in a claw-like manner, as illustrated in Fig. 1.

Both cages 1 and 2 are thus loosely connected to each other by shaft 3 of the twin roller and, by turning shaft 3, they may be placed into any desired position and may also be retained therein by the provision of suitable means, for example, a spring 23 as shown in Fig. 3, whereby shaft 3 will be positively but still rotatably retained within its mounting saddle 22. This manner of construction considerably facilitates the installation of the roller in the draw frame.

The cages of the twin roller as illustrated in Figs. 4 and 5 are loosely connected to each other by a special intermediate connecting member 11 which is disposed between

rollers

17 and 18 on shaft 12. They will therefore always assume the same position as the individual cages shown in Figs. 1 and 2. The connecting member .11, shown in a perspective view in Fig. 7, may be inexpensively produced of resilient sheet metal and be easily attached to normal pressure rollers so as to fit loosely or tightly thereon. The two coupling portions 112 of connecting member 11 serve as stops for the two

arms

201 and 202 of the individual cages 19 and 20, respectively. In some cases, as illustrated in Figs. 5, 6, and 7, it may also be advisable to provide the connecting web 114 of member 11 with projecting lugs 115 which are adapted to maintain member 11 exactly at the center of shaft 12. These projecting lugs 115 engage into the reduced portion of shaft 12 closely adjacent to the shoulder portions thereof.

The intermediate connecting member 11 for separating the cages of the twin roller as shown in Figs. 4 and 5 is designed so as to permit it to be installed into the holder 15 of the loading saddle 16, as shown in Fig. 6, only if cages 19 and 20 assume a certain position relative to holder 15. This position depends upon the position of the connecting web 114 in holder 15.

The connecting member 11 is preferably designed so that, after the roller has been installed into the loading saddle, the cages will only be able to carry out small rotary movements on shaft 12 which are limited by stops on the connecting member which are adapted to engage with the holder or loading saddle. These stops on the connecting member for limiting the small rotary movements of the cages are formed by the

edges

114 and 114" of the connecting web 114 which are adapted to engage with

arms

151 or 152, respectively, of holder 15, as illustrated in Fig. 6.

The stops for limiting the small rotary movements may also be formed by special lugs on holder 15 or on loading saddle 16, against which the connecting member engages. These stops in loading saddle 16 may be disposed in such a position that, when the holder is raised or tilted upwardly, the cages'will assume a position from which they can be easily returned to the operative position.

:In certain cases it may be advisable to design the connecting member so as merely to act as a member for coupling the two cages but not so as also to permit the installation of the roller into the holder except within a certain pivotal range of the cages. Such a connection of the two individual cages may be attained, for example, by providing two separate connecting members on the shaft. Fig. 8 illustrates a perspective view of two such connecting members 21 which may be clamped uponshaft 12. The coupling projections 211 limit the pivotal range of each individual cage relative to the shaft similar- 1y as those shown in Fig. 4.

, Although my invention has been illustrated and described with reference to the preferred embodiments thereof, I wish to have it understood that it is in no way limited to the details of such embodiments, but is capable of numerous modifications within the scope of the appended claims.

Having thus fully disclosed my invention, what I claim 1. A drawing mechanism for spinning machines having upper belts, comprising a twin pressure roller having a shaft, two individual cages loosely mounted on said shaft so as to be movable thereon, and means for loosely coupling said cages to each other, said coupling means comprising associated parts on said cages and on said shaft adapted loosely to engage with each other whereby said cages are coupled with each other through said shaft but are movable to a limited extent relative to each other.

2. A drawing mechanism for spinning machines having upper belts, comprising a twin pressure roller having a shaft, two individual cages loosely mounted on said shaft so as to be movable thereon, and means for loosely coupling said cages to each other, said coupling means comprising at least one connecting member mounted on said shaft intermediate said cages and adapted loosely to engage with said cages whereby said cages are coupled with each other through said connecting member but are movable to a limited extent relative to each other.

3. A drawing mechanism for spinning machines having upper belts, comprising a twin pressure roller having a shaft, two individual cages loosely mounted on said shaft so as to be movable thereon, and means for loosely coupling said cages to each other, said coupling means comprising at least one connecting member mounted on said shaft intermediate said cages and adapted loosely to engage with said cages whereby said cages are coupled with each other through said connecting member but are movable to a limited extent relative to each other, further comprising means for supporting said pressure roller, and associated means on said connecting member and said supporting means for limiting a rotary movement of said connecting member.

4. A drawing mechanism for spinning machines having upper belts, comprising a twin pressure roller having a shaft, two individual cages loosely mounted on said shaft so as to be movable thereon, and means for loosely coupling said cages to each other, said coupling means comprising at least one connecting member mounted on said shaft intermediate said cages and adapted loosely to engage with said cages whereby said cages are coupled with each other through said connecting member but are movable to a limited extent relative to each other, said connecting member being resiliently clamped upon said shaft and having coupling projections on its outer ends adapted loosely to engage with said cages.

5. A drawing mechanism for spinning machines having upper belts, comprising a twin pressure roller having a shaft, two individual cages loosely mounted on said shaft so as to be movable thereon, and means for loosely coupling said cages to each other, said coupling means comprising two connecting members resiliently clamped upon said shaft intermediate said cages and spaced from each other, each of said connecting members having a coupling projection adapted loosely to engage with said cages whereby said cages are coupled with each other through said connecting members and said shaft but are movable to a limited extent relative to each other.

References Cited in the file of this patent UNITED STATES PATENTS 1,448,192 Butler Mar. 13, 1923 2,267,443 Cobb Dec. 23, 1941 2,332,973 Louie Oct. 26, 1943 2,771,640 Cotchett Nov. 27, 1956