US2029943A

US2029943A - Yarn and thread tensioning mechanism for cop winding and like textile machines

Info

Publication number: US2029943A
Application number: US735888A
Authority: US
Inventors: Reiners Wilhelm; Kahlisch Gustav
Original assignee: W Schlafhorst AG and Co
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 1933-08-02
Filing date: 1934-07-18
Publication date: 1936-02-04
Anticipated expiration: 1953-02-04
Also published as: GB420284A

Description

Febe 4, 1936.

W. REINERS ET AL YARN AND THREAD TENSIONING MECHANISM FOR COP WINDING AND LIKE TEXTILE MACHINES Filed July 18, 1934 2 Sheets-Sheet 1 Feb. 4, 1936. w. RElNERS ET AL 2,029,943

YARN AND THREAD TENSIONING MECHANISM FOR COP WINDING AND LIKE TEXTILE MACHINES Filed July 18, 1934 2 Sheets-Sheet 2 Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE YARN AND THREAD TENSIONING DIECHA- NISM FOR COP TILE MACHINES WINDING AND LIKE TEX- German corporation Application July 18, 1934, Serial No. 735,888 In Germany April 4, 1934 2 Claims.

The invention relates to yarn and thread .tensioners for cop winding and like machines, of the kind in which the yarn passes between rotat ing brake disks pressed towards'each other by weights or springs. According to our invention several such ten sioning units are driven by a shaft common to them all with a separate clutch for transmitting the drive to each tensioning unit, adapted to be disengaged automatically by a stop motion device on breakage of the yarn, so that stoppage of any one tensioning unit does not interfere with the drive of the other.

Several embodiments of the invention .-are.

shown in the accompanying drawings.

Fig. 1 is a vertical section of ,one'of the tenlsioning units, and Fig. 2 is a sectionalplan view thereof.

Fig. 3 is a plan view of several such uriits,'with their stop motion devices, and Fig. 4 is an elevation showing one of them, Fig. 5 being a similar view, but showing the stop motion position after breakage of thread.

' Figs. 6 and 7 are respectively a plan view and side view showing another form of construction,

and

Fig. 8 is a plan view showing a further modiflcation.

Referring first to the construction shown in Figs. 1 and 2, the two brake disks I and 2 are rotatably mounted on a sleeve 3 enlarged at one end to form a cup 4 having therein a pad 5 of felt, rubber or the like. The sleeve 3 is one of a series of similar sleeves, all mounted on a shaft 6. For each sleeve 3 this'shaft has fixed thereto an adjustable collar 1, against which the pad 5 is pressed for frictionally coupling the sleeve with the shaft. A portion of the sleeve 3 is externally screw-threaded and has nuts 8 and 9 thereon, and a coiled spring In between these nuts .and the disks I and 2 presses the disks against the cup 4. Instead of the spring I0 some other elastic device may be used, for example a ring of felt, rubber or the like. The pressure is regulated by adjusting the nuts 8, 9. The cup 4 has external grooves I I, and a stud I2 on the disk I engages into one or other of these grooves, so that the disks rotate with the sleeve 3.

The sleeve 3 is'urged towards the collar 1 by a spring I3 coiled on the shaft 6 between the sleeve and an adjustable collar I4.

The disk I has a hollow hub with holes I5 in its circumference for the discharge of foreign matter which may be stripped off the yarn and find its way into the hub. The hub of the disk 2 has radial slots I6 (Fig. 2) which serve the same purpose of discharging foreign matter rubbed off the yarn.

For each of the tensioning units there is a dou- "ble armed stop motion lever I'I, shown in Figs. 3, 4 and 5. The levers H are carried by a hori-' zontal rod I8, on which each of them is pivoted between two adjustable collars I9 and 20. Each lever H has at one end thereof a lateral arm 2 I extending alongside a rod 22, and the yarn 23 coming from between the disks I and 2 passes over the rod 22 and arm 2|, depressing the latter. Near the opposite end 24 of the lever there is an adjustable weight 25, and fixed to the pivot of the lever is an arm 26 having a nose 2! directed towards the circumference of the cup 4.

' If the yarn breaks and consequently releases the arm 2| the lever I1 and arm 26 are rocked by the weight 25, so that the nose 2'Iengages one or other of the grooves I I in the cup 4, thus stopping rotation of the sleeve 3 and disks I, 2. The driving collar I and shaft 6 continue to rotate, and the other tensioning units continue to function.

As shown in Fig. 3 the shaft 6 is driven by a pulley 29, belt 30, pulley 3I and shaft 32, but of course any other suitable means may be used for that purpose.

In the modification shown in Figs. 6 and '7 a non-rotatable rod 31 parallel with the shaft 6 has fixed thereto forked arms 38 and each of the arms engages one side of a ring 3 9 which is slidable on one of the sleeves 3 and serves as an abutment or seat for the spring III. The rod 3'l is axially movable on

bearings

40, 4|, and is axially adjustable by means of

nuts

42, 43, for the purpose of regulating the pressure of the springs III on the brake disks.

In the modification shown in Fig. 8 provision is made'for continuouswhange of the pressure exerted by the springs III. This may be desirable or necessary in the case of winding tapered packages of yarn, where the rate of winding changes in accordance with change of diameter, and corresponding change of brake effect is required in order to keep the yarn tension substantially uniform. The arrangement may also be desirable in the case of cylindrical yarn packages, where reduction of brake effect is required as the diameter of the package increases.

As shown In Fig. 8 the rod 31 has thereon, near one end, a nut 44 acting as a guard nut to a cap 45 screwed on to the end of the rod. The cap abuts against a cam 46 fixed to the shaft 6, so that in the course of rotation of the shaft the pressure exerted through the springs I0 is alternately increased and reduced. Alternatively the cam 46 may be fixed to a separate shaft, driven by means of transmission gear at any required speed differing from that of the shaft 6. It may then be arranged that instead of alternate increase and reduction of spring pressure there is a continuous increase or continuous decrease, at a uniform or at a varying rate.

What we claim as our invention and desire to secure by Letters Patent of the United States:

1. Yarn tensioning mechanism comprising in combination a plurality of tensioning units, each consisting of two rotatable brake disks arranged for yarn to pass with friction between them, elastic means whereby one disk of each unit is urged towards the other disk, means common to all said units for regulating said elastic means, driving mechanism common to all said units,

no for each of said units a friction coupling connecting it to said driving mechanism, and for= each of said units a stop motion device adapted on breakage of yarn to uncouple the unit from said driving mechanism.

2. Yarn tensioning mechanism comprising in combination a plurality of tensioning units, each consisting of two rotatable brake disks arranged for yarn to pass with friction between them, elastic means whereby one disk of each unit is urged towards the other disk, cam mechanism common to all said units for regulating said elastic means, driving mechanism common to all said units, for each of said units a friction coupling connecting it to said driving mechanism, and for each of said units a stop motion device adapted on breakage of yarn to uncouple the unit from said driving mechanism.

WILHEIM REINERS. GUSTAV KAHLISCH.