US2677870A - Beam warping apparatus - Google Patents

Description

May 11, 1954 s. FURST BEAM WARPING APPARATUS Filed Feb. 6, 1951 In venfansame.

Patented May 11, 1954 UNITED STATES PATENT OFFICE BEAM WARPING APPARATUS Stefan Fiirst, Gladbach, Germany, assignor to Walter Reiners, Waldniel (Niederrhein), Germany 14 Claims.

This invention relates to beam warping apparatus of the kind in which braking mechanisms are provided for braking one or more rotary members whose weight changes during the winding process, e. g. the beam and its load of thread, and for braking one or more rotary members whose weight does not change, e. g. the driving roller which engages the winding of thread on the beam and/or a measuring roller, when provided, over which the thread being wound on the beam passes.

As is well known it is important in such apparatus including a beam, a driving roller and a measuring roller to apply the brakes to the various members in such a manner as to cause them to decelerate and stop in synchronism in order to avoid slipping between the thread on the beam and the driving or pressing roller and between the thread and the measuring roller when provided. In practice, it has been found, however, that this cannot be achieved merely by providing a single operating member for the various braking mechanisms and a fixed adjustment for the individual mechanisms, since the weight of the beam and its load of thread changes according to the weight of the thread thereon whereas the weight of the driving or pressing roller and of the measuring roller when provided rem the The object of the present invention is to provide an improved beaming apparatus in which a closer approach to synchronism between the various braked members during the braking operation is obtained.

To this end, according to the present invention a beam warping apparatus, having one or more rotary members whose weight changes during the thread winding process and one or more rotary members whose weight does not change,

is provided with a brake control mechanism which has a manually or automatically operated ture of the invention, the brakes are of the mechanical friction type and are operated by hydraulic or gas pressure derived from two cylinders one of which is connected to the brake or brakes of the beam while the other is connected to the brake or brakes for the part or parts whose weight does not vary, that is to say for the driving or pressing roller, and for the measuring roller when provided. The pistons in the two cylinders are operated by a common floating lever on which an operating member acts through an adjusting device at a point in the length of the beam which is varied by the adjusting device so as to vary the ratio of the forces applied respectively to the two pistons and thus to the respective brakes for the parts of variable weight and for the parts of invariable weight.

Preferably the adjusting device is moved automatically in accordance with the weight of the beam and its load of thread, for example by means of a movable member whose position is dependent upon the diameter of the winding of thread upon the beam. For example, the beam may be journalled in arms which swing about an axis to maintain the thread on the beam in contact with the driving or pressing roller; and a cam and follower device or other operative connection may be provided for moving the adjusting device in dependence upon the swinging movement of one of the arms.

The invention may be carried into practice in various ways, one embodiment of a beam warper according to the invention being shown diagrammatically and by way of example in the accompanying drawing.

The illustrated warper comprises a machine frame i which carries a driving roller '2 with a hydraulically operated brake 3, and a measuring roller with a hydraulically operated brake 5. A warp beam 6 with a hydraulically operated brake i is supported on arms 8 pivoted to the frame at 9.

One of the arms 8 is provided with a control cam Hi which acts on a follower lever H, l2. The lever is kept in contact with the cam by a spring 13 and is pivoted to frame i at Id.

The arm 12 of the lever Ii, i2 is connected by a link !5 to an adjusting device in the form of a swinging arm l5 pivoted at 58 to an operating member formed by a lever I l which is pivoted at 3 and is acted upon by a spring The spring 28, when so permitted, acts through the operating lever H and the adjusting device it on a floating lever 2|. The two opposite ends of the floating lever 2! act respectively on hydraulio pistons in two hydraulic cylinders 24 and 25.

The cylinder 24 is connected by pipes 2?, 28 to the operating cylinders of the hydraulic brakes 5 and 3 while the hydraulic cylinder 25 connected by a pipe 25 to the operating cylinder of the hydraulic brake l.

The operation of the braking mechanism is as follows:

When the braking operation is initiated in known manner, the spring is permitted to move the lever ll, through which the force applied by the spring is transmitted through the adjusting device 16 to the floating lever 2i. The point which along the floating lever is acted upon by the device IS determines the ratio of the respective forces applied by the pistons to the liquid in the two cylinders 24 and and hence to the brakes 3 and 4 on the one hand and the brake 1 on the other hand.

In the position of adjustment shown in the drawing the device [6 engages the floating lever 2i at about the centre of its length. Hence substantially the same force magnitudes are applied to the pistons in the two cylinders 24 and 25. If the adjusting device I6 is displaced to-a diiferent position, for instance the one indicated at [6, such displacement being due, for instance, to movement of arm 8 caused by a change in the quantity of the thread on beam 6, then the ratio of the forces applied to the pistons in the two cylinders 24 and 25 is changed correspondingly. The larger the diameter of the winding of thread upon the beam '6, the greater is the force to the piston in cylinder'25 in relation to that applied to the piston in cylinder 24. Thus, with a suitable'shape of cam [0, it is possible to ensure that, for different weights of the beam and its load of thread, the ratio be tween the braking forces applied respectively to the beam and to the rotary members of invariable weight is always approximately such that all the members decelerate and stop substantially in synchronism.

It will also be seen that, regardless of the force magnitude applied by spring 20 to lever H, the ratio of the forces with which the brakes 3 and i on the one hand and the brake I on the other hand are applied willremain the same for any given setting of the adjusting device I6.

It is to be understood that, although in the example shown in the drawings the adjusting device i6 is arranged so as to be moved automatically in accordance with the quantity of thread upon the beam, it may alternatively or in addition be arranged 'to be moved byhand into any position suited to the weight of thread upon the beam.

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

1. Beam warping apparatus including a rotary beam, a roller arranged to engage the thread wound upon the beam, and braking apparatus for the beam and the roller comprising separate braking mechanisms -respectively for the beam and the roller, and operatingmechanism for the braking mechanisms-including an operating member and an adjusting device the 'setting of which determines the'ratio of the forces applied to the individual braking-mechanisms by the operating member.

2. Beam warping apparatus including a rotary beam, a driving roller arranged to engage the thread wound on the beam, ameasuring roller over which the thread passes onto the beam during the windingprocess, and braking-apparatus for the beam and the driving and measuring rollers comprising separate braking mechanisms respectively for the beam and for the two rollers, and operating mechanism for the braking mechanisms sai'd operating mechanisms having an operating member'and having an adjusting device whose setting determines the ratio of the forces applied respectively to the braking mechanism for the beam and to the braking mechanism for the two rollers, said adjusting device being interposed between said operating member and said respective braking mechanisms.

3. Beam warping apparatus as claimed in claim 1 including a device responsive to variations in the quantity of thread wound on the beam, and an operative connection between said device and the adjusting device, causing movement of the adjusting device to vary its setting in accordance with the quantity of thread on the beam.

4..Beam warping apparatus including a rotary beam, a driving roller arranged to engage thethread wound on the beam, a measuring roller over which the thread passes onto the beam, hydraulically operated friction brakes acting respectively on the beam, the driving roller and-themeasuring roller, a swinging arm supporting the beam and movable to maintain contact between the thread thereon and the driving roller, a pressure cylinder connected by piping to the brakes for the driving roller and the measuring roller, a second pressure cylinder connected by pipes to the brake for the beam, pressure applying pistons in the two pressure cylinders, a floating lever the ends of which act respectively on the two pressure applying pistons,

a brakeoperating member, an adjusting device acted upon by the brake operating member and acting on the floating lever at an intermediate point in its length, a cam on the swinging arm, and adjusting mechanism through which the cam when moved changes the position of the adjusting device and hence the point in the length of the floating lever at which it acts.

5. Winding apparatus'for thread including a rotary member onto which the thread is wound, a driving roller engaging the thread Wound on the said rotary member, brake mechanism for stopping the rotary member, brake mechanism for stopping the driving roller and operating mechanism for the two brake mechanisms comprising an operating member and an operative .connection between the operating member and,

the two brake mechanisms including an adjusting devicethe setting of which determines the ratio of the forces to be applied to the two brake operating mechanisms by the operating member.

6. Beam warping apparatus, comprising at least one rotary member having an effective weight variable during winding operation and at least one rotary member of constant weight, braking devices connected with said respective rotary members for braking said members, a power supply mechanism for simultaneously actuating said braking devices, and variable-ratio transmission means connecting said mechanism with said respective braking devices and having an adjusting device movable to different positions corresponding to respectively different ratios of the forces to be applied to said respective devices by said mechanism.

7. A beam warping apparatus, comprising a rotary thread-carrying member having an effective weight variable during winding operation and a rotary member of invariable weight, braking mechanisms joined with said respective rotary members, braking power supply means havinga movable operating member, a floating lever having two points of junction with said respective mechanisms, an adjusting device connecting said operating member with a point of said lever intermediate-said two junction points, said adjusting device being adjustable to shift said intermediate point for varying the ratio of the forces to be applied to said braking mechanisms by said operating member.

8. In beam warping apparatus according to claim 7, said braking mechanisms comprising respective hydraulic friction brakes engageable with said respective rotary members, each brake having a brake control cylinder and a piston movable in said cylinder, and said respective pistons being linked with said floating lever at said respective junction points.

9. In beam warping apparatus according to claim 1, a floating lever having two junction points of a fixed mutua1 spacing at which said lever is linked with said respective braking mechanisms, and said adjusting device being in engagement with said lever at a point intermediate said two junction points and being movable to shift said intermediate point along said lever.

10. In beam warping apparatus according to claim 2, said braking mechanisms having respective operable friction brakes, two hydraulic control devices each having a pressure cylinder and a piston in said cylinder, one of said hydraulic devices being connected with said brake of said beam, said other hydraulic device being connected with said two brakes of said two rollers respectively, a lever linked at mutually spaced junction points with said two respective pistons, and said adjusting device being in engagement with said lever at an adjustable point intermediate said two junction points.

11. Beam warpin apparatus, comprising a rotary beam member to carry a winding of thread material and having a roller rotatable simultaneously with said beam member, braking devices joined with said respective rotary members, a power supply mechanism for simultaneously actuating said braking devices, variable-ratio transmission means connecting said mechanism with said respective braking devices and having an adjusting device movable to different positions corresponding to respectively different ratios of the forces applied to said respective devices by said mechanism, and control means responsive to the amount of thread upon said beam member and connected with said adjusting device for moving it in dependence upon the variation of said amount.

12. Beam warping apparatus according to claim 1, comprising pivotally mounted swing arms, said beam being journalled on said arms for pivotal movement toward said roller to maintain contact between the roller and the thread on the beam, and an operative connection between one of said arms and said adjusting device whereby movement of said arms varies the setting of said adjusting device.

13. In beam warping apparatus according to claim 1, a floating lever having two junction points of a fixed mutual spacing at which said lever is linked with said respective braking mechanisms, said adjusting device being in engagement with said lever at a point intermediate said two: junction points and being movable to shift said intermediate point along said lever.

14. In beam warping apparatus according to claim 1, comprising pivotally mounted swing arms, said beam being journalled on said arms for pivotal movement toward said roller to maintain contact between the roller and the thread on the beam, and an operative connection between one of said arms and said adjusting device whereby movement of said arms varies the setting of said adjusting device, said comiection comprising a cam on said one swing arm, and a cam follower engaging said cam and connected to said adjusting device.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,356,365 Wiggerman Aug. 22, 1944 2,382,760 Wiggerman Aug. 14, 1945 2,384,474 Lambach Sept. 11, 1945

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