US1920111A

US1920111A - Cop winding frame

Info

Publication number: US1920111A
Application number: US500126A
Authority: US
Inventors: Schweiter Walter
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-01-22
Filing date: 1930-12-04
Publication date: 1933-07-25
Anticipated expiration: 1950-07-25
Also published as: CH145121A; FR707291A; GB358401A; DE537823C; GB354656A

Description

uFuly 2 5, 1933. w 5 w 1,920,111

- COP WINDING FRAME Filed Dec. 4, 1950 5 Sheets-Sheet 1 July 25, 1933. w SCI-NEWER 1,920,111

COP WINDING FRAME Filed Dec. 4, 1930 5 Sheets-Sheet 2 July 25, 1933. w sc w 1,920,111

COP WINDING FRAME Filed Dec. 4, 1930 3 Sheets-Sheet 3 Patented July 1933 UNITEDSTATES PATENT OFFICE WALTER SCHWEITER, OF HORGEN, NEAR ZURICH, SWITZERLAND cor WINDING FRAME Applicfltionfiled December 4, 1930, Serial No. 500,126, and in Germanyianuary 21, 1930.

15 for instance on a thread guide which is adapted both to take up the variations inthe tension of the thread and to exert a braking effect upon the unwinding bobbin by means of a band brake. This combination of a thread'guide with a band brake has generally proved effective, although the fineness of the mutual adjustment and the effect of the brake do not meet all possible events. Above all, the band brakes hitherto used are unable so to brake down the unwinding bobbin in an efficacious manner upon a sudden lowering of the tension of the thread, that disturbances are'excluded.

Now the invention has for its object to overcome these drawbacks, which object is achieved primarily the brake band employed being arranged so as to be swung about a fixed point, a spring accumulator being interposed which owing to its elasticity is adapted so to displace at least the one point of suspension of the brake band in accordance with the power actuating the brake, that the brake band embraces a greater or smaller section of the periphery of the brake disc. While hitherto the brake band whether attracted either by a great or by a small power, always touched the same section of the periphery of the brake disc,

according to the invention the surface on which the band and the disc touch one another, entirely depends upon the power employed, so that as long as only a small power is exerted, the braking surface is also small, While with increased braking power the braking surface increases also,

whereby the braking effect becomes more eflicacious and better adapts itself to the prevailing conditions.

In order to regulate the possibility of adjusting the braking effect in accordance with the thread material to be wound, the one fulcrum of the spring accumulator may be fixed to the one leg of a bell crank lever which is axially shiftable against the action of a spring, while the other leg, which has i the shape of a segment and is provided with notches or holes adapted .to receive a fixed locking bolt, can be set in different positions, so that the fulcrum changes its position relatively to the brake disc.

In order that the invention may be more readily understood, two embodiments of the same are illustrated by way of example in the accompanying drawings in which Figure 1 is a lateral view of a brake forming the first embodiment,

Figure 2 is a View of the parts under consideration of a winding frame;

Figure 3 shows the upper portion, of the Figure 2 with some parts in a different position,

Figure 4 is a view similar to Figure 2 shows the other embodiment, and

Figures 5 and 6 show the appurtenant braking device in side and end view, respec tively, and on an enlarged scale.

Referring to these drawings, 4 denotes the unwinding bobbin on the shaft of which is rigidly mounted a brake disc 5. A prefei ably endless brake band 6 embraces a portion of the periphery of disc 5 which band is fixed with one end at 7 and with the other end at 8 to both ends of a resilient carrier 9 made from a steel strip; The carrier 9 constitutes the spring accumulator mentioned above and forms a loop at 10 bywhich it is hingedly fixed to a journal 11 while the other end of carrier 9 rests on a pull rod 12, Figure 1. As will be further seen from this figure, the two free ends of the brake band carrier 9 are bent off so as to have the brake disc 5 between them. The pull rod 12 is under the influence of the thread guide 13, Figures 2 and 3, which guides the thread 14 on the rollers 15 to the winding bobbin 16.

and

Figure 2 shows the thread guide 13 in the tensioned condition, which is the case when the pull of the thread acting in the direction of arrow has increased. This position of guide 13 causes, byineans of the connection of rod 12, the brake band 6 to assume the position shown relatively to the brake disc 5, in which position the brake band 6 is in contact with the latter only slightly or not at all.

to its elasticity, about to the position illustrated in Figure 3. When this takes place,

rod 12 entrains the brake so that a displacement of'the

fulcrum

7 and 8 is caused rela ,tively to the brake disc 5, while the carrier 9 is elasticallybent down Vhile thus in the position of the parts shown in F igur c 2 the band 6, touched only a small section, of

again, the guide 13 lowers and the brake band 6 owing to the elasticity of carrier 9 assumes again its original position.

In order to enable an exact regulation of 7 the braking action the journal 11 may be made adjustable. To this end as to be seen from Figures 4 to 6, the journal 11 is fixed to the one leg 17 of a bell.

crank lever

17, 19 which is fulcrumed at 18 amlthe other leg 19 of which forms a segment 21 having a series of holsjQO. By means ot' an axially extending handle 22

lever

17, 19 can be shifted in an axial direction against, the actionof a spring 23. By these means the

lever

17, 19 can be locked in position by. a fixed bolt 21- engaging one of the holes 20, and released ,by retiring it on handle 22, whereupon it can be swung so that journal 11 can beraised or lowerechas indicated by arrows, Figure 5. In this way the position or the resilient carrier 9 and thus that of the brake band relatively to the brake disc is altered, whereby the original braking action is increased or decreased, whilst the additional alteration of the braking action by means .of-the pull of the thread 1 1 is not influenced by this adjustment of journal 11. It may be noted that the embodiments illustrated are merelyexamples of realization of the essence of the invention, which is not confined to these special designs. On

As soon as the pull of the thread 14" decreases, thethread guide 13 rises owing -1. In the combination of a hand brake arrangement for an unwinding bobbin, a brake disc, a brake band in engagement with said brake, disc, a carrier-for said band having two arms across which said band extends lever upon which said carrier is pivoted,

means for adjustably setting said lever with respect to saidhrake disc, and means for varying the angular contact surface between said brake disc and band in accordance with the tension upon the thread unwound from the bobbin. V

.2. I11 the combination of a band brake ar rangement for an unwinding bobbin, a brake disc, a brake band in engagement with said brake disc, a carrier for said band having, 'two arms across which said band extends, a

double armed lever mounted in the machine frame, upon which said carrier is pivoted, one of said arms of said lever carrying said pivoted joint 01 thecarrier, and a plurality of locking apertures on the other arm adapted to cooperateiwith a locking bolt to selec- .tively lock the double armed lever in different positions with respect to the brake disc, andmeans for varying theangular con tact surface between said brake disc and band in accordance with the tension upon the thread unwound from the bobbin.

3. In the combination of a hand brake arrangement for an unwinding bobbin, a

brakeldisc, a brake band in engagement with said brake d1sc,'a carrier for sald band hav-' ing two arms across which said band extends, a double armed lever axially and angularly movable in the machine frame upon which said carrier is pivoted, one of said arms fol said lever carrying said pivoted jointoi the carrier, :Etlld a pluralityof locking apertures on the other arm adapted to cooperate with a locking bolt to selectively lock the double armed lever in difierent p0 sitions with respect to the brake disc, a spring for yieldingly maintaining said lever in locked position, means for axially'shifting said lever to release the same from its locked position, andmeans for varying the angular contact surface between said brake disc and band in accordance with the tension upon the thread unwound from the bob bin. 1 j

I WALTER SCHWEITER.