US2811751A

US2811751A - Drawing frame for a spinning machine

Info

Publication number: US2811751A
Application number: US501317A
Authority: US
Inventors: Nebich Rudi
Original assignee: Spinnerei Karl Marx VEB
Current assignee: Spinnerei Karl Marx VEB
Priority date: 1955-04-14
Filing date: 1955-04-14
Publication date: 1957-11-05
Anticipated expiration: 1974-11-05

Description

Nov. 5, 1957 R. NEBlcH DRAWING FRAME FOR A SPINNING MACHINE Filed April 14, 1955 2 Sheets-Sheet 1 PUD; NEB/CH Nov. 5, 1957 R. NEBlcH 2,811,751

DRAWING FRAME FOR A SPINNING MACHINE Filed April 14, 1955 2 Sheets-$11991*I 2 INVENTOR UD/ NEB/CH 2,811,751 DRAWING FRAME FOR A SPINNING MACHINE Rudi Nebicll, Karl-Marx-Stadt, Germany, assigner to VEB Spinnereimaschnenbau Karl-Marx-Stadt, Karl- Marx-Stadt, Germany Application April 14, 1955, Serial No. 501,317 9 Claims. (Cl. 19135) This invention relates to spinning machines, and more particularly to a device for subjecting the top rollers of a drawing frame to a load.A

An object of the invention is to provide a drawing frame, wherein the distances between its rollers may be varied and wherein the load acting on the adjustable top rollers remains the same at all times, regardless of the distances as they may be adjusted between said adjustable top rollers. j

Another object of the invention is to provide a drawing frame with adjustable rollers, wherein, irrespective of the position of the adjusted top rollers, said top rollers may be subjected at all times to the same load without necessitating a change in the position of the weighting means causing the load.

Another object of the invention is to improve on the construction of drawing frames as now customarily made.

Other objects and structural details of the invention will be apparent from the following description when read in conjunction with the accompanying drawings forming part of this specification, wherein: f

Fig. 1 is a side elevational view, partly in section, of a support carrying the top rollers of a drawing frame according to the invention,

Fig. 2 is a side elevational view of the'support shown in Fig. 1, wherein, however, the upper portion thereof is in opened position,

Fig. 3 is a fragmentary top plan view of the lower portion of another embodiment of a support according to the invention, and

Fig. 4 is a vertical sectional View of a different embodiment of a weighting means arrangement of the device according to the invention.

Referring now to Figs. l and 2, 30 generally indicates a support for the top rollers 1, 2, 3 of a Adrawing frame.

Said support 30 comprises an upper portion 11 swing-k ably mounted on a lower portion 12 at 13. The top rollers 1, 2, 3 are carried by holders 4, 4, 4 respectively. The position of the feed top roller 3 is xed, but the other two top rollers may be adjusted in the direction of drawing. For this purpose, the holders 4 and 4" of said top rollers 1 and 2 are mounted on double-armed levers 5, 6 and 5', 6' respectively which are provided with the bearing journals 7 and 7 respectively. Compression springs 8, S respectively act from above onto the front arms 5, respectively of said double-armed levers, while compression springs 9, 9 respectively act from below onto the

rear arms

6, 6"respec`tively of said double-armed levers. Said compression springs 8, 8', 9 and 9 are immovably arranged, whereas the double-

armed levers

5, 6 and 5', 6 may be displaced in the direction of the drawing operation. To that end, the `support 30 is provided with series of

notches

10 and 10 respectively. According to the embodiment shown in Figs. l and 2, each series of

notches

10, 10 has seven notches for nited States Patent selective engagement with the journals or pins 7, 7 of the double-

armed levers

5, 6 and 5, 6. The pin 7 of the double-armed lever 5, 6 carrying the delivery top roller 1 is placed in the center notch of the series of notches 10. Therefore, the distance x of the axis of the spring S from the axis of the journal 7 of the doublearmed lever 5, 6 is exactly the same as the distance y between the axis of the spring 9 and said journal 7. According to the arrangement shown in Figs. 1 and 2, however, pin 7 of the double-armed lever 5, 6 carrying the center top roller 2 is engaged with the third notch from the front of the series of notches 10', so that the distance x' between the spring 8 and the pin 7 is smaller than the distance y between the spring 9' and the pin 7. Thus, when the .pin 7 of the double-armed lever 5, 6 is displaced from a center position (as shown for pin 7 of the double-armed lever 5, 6) into the olf-center position shown in Figs. l and 2, the spring S is brought nearer to the axis of the pin 7 by one division of the series of notches 10', while, at the same time7 the spring 9 has been removed from the axis of the pin 7 by the same division, it being understood that only the double-armed lever S', 6 has been displaced while the springs 8 and 9 remain in their position relative to the casing of the support 30. Thus, the spring 8 will exert a smaller pressure on the top roller 2 than the corresponding spring S on top roller 1. On the other hand, however, the pressure of spring 9 on the top roller 2 is proportionately greater than the pressure exerted by the spring 8 on the top roller 1.

It will be readily understood from above that the load acting on the top rollers 1 and 2 at all times has the same value, irrespective of the position of said adjustable top rollers 1 and 2, and that this effect is obtained without a displacement of the weighting means 8, 8, 9 and 9'. Each weighting station has two stationary weighting means 8, 9 and 8', 9 respectively which, while being in complementary relation to each other, cooperate in such a manner with each other, that they exert the same total pressure on the associated top roller, irrespective of the position of the latter. At each weighting station the twosprings 8 and 9 or 8 and 9 respectively act in the same direction of rotation on the two arms of the double-armed lever 5, 6 or 5, respectively; said two springs actingon the two arms of the double-armed lever in opposite directions remain in their position while the pivot 7 or 7 respectively of the associated double-armed lever may be displaced in the direction of the drawing, so that upon a displacement of the pivot 7 or 7 the latter is brought nearer to one of the springs or weighting means to the same extent as it has been removed from the other spring or weighting means.

Preferably the support 30 is constructed in the form of a hollow body, the two double-armed levers 5, 6 and 5, 7 being accommodated therein. The upper portion 11.

of said support 39 carries the springs 8 and 8 acting on the double-armed levers in a downward direction, whereas the springs 9 and 9 acting on the double-armed levers in an upward direction are arranged on the lower portion 12 of the support 30. According to the embodiment shown in the drawings, the upper portion 11 may be swung about the pivot 13 from the operative position shown in Fig. l into the inoperative or open position shown in Fig. 3. If desired, however, the upper portion 11 may be detachably mounted on the lower portion 12. The series of

notches

10 and 10 are provided at the line of contact between the upper and lower portions 11 and 12, respectively. In the operating position the upper portion 11 is fastened to the lower portion 12 by means of a spring catch 14.

In order to change the distances between the top rollers the upper portion 11 is simply swung, in the direction of the arrow A of Fig. l, into the position shown in Fig. 3. Thereafter the double-

armed levers

5, 6 and 5', 6 may be displaced manually, as required. The upper portion 11 is then again lowered and fastened to the lower portion 12.

The double-armed levers 5, 6 and 5', 6' must have a predetermined length. If it is desired to bring two top rollers close to each other, preferably, as shown in Fig. 3, the support 130 is divided into two compartments 116 and 117 by means of a vertical longitudinal partition 115. In such a case, the double-

armed lever

105, 106, 107 carrying the delivery top roller isarranged in the compart ment 116, whereas the compartment 117 will house the double-armed lever 105', 106', 107 carrying the center top roller. In this way the delivery top roller and the center top roller may be brought together so close that they will touch. each other. It is merely necessary that the series of notches 110 and 110' are arranged accordingly and that the lower parts of the front arms 105', 105 of the double-armed levers carrying the holders for the two top rollers are arranged in alignment with each other in a common vertical plane.

Preferably, as shown in Fig. 4, the spring 9 of a support according to Fig. l is arranged around a guiding pin 18 secured to the wall of the lower portion 12 of the support 30. A flattened head 19 of said pin 18 is engaged with an elongated slot 20 of the arm 6 of the doublearmed lever 5, 6, 7. Itis understood, that the spring 9' may be mounted on the lower portion 12 of the support 30 in a similar manner. Likewise the springs 8 and 8 may be mounted on the upper portion 11 of the support 30 in a similar manner.

The entire support 30 may be tilted around a supporting rod 21, to withdraw the top rollers 1, 2 and 3 from the bottom rollers (not shown). Preferably locking means (not shown) are provided for holding the swingable support 30 in its two end positions.

I have described preferred embodiments of my invention, but it is understood that this disclosure is for the purpose of illustration, and that various omissions and changes in shape, proportion and arrangement of parts, as well as the substitution of equivalent elements for the arrangements shown and described may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

For example, the weighting means need not necessarily be compression springs. Tension springs will be also suitable for this purpose. Furthermore, leaf springs may be used instead of helical springs as shown. It is also possible to use weights.

The double-armed levers 5, 6 and 5', 6', furthermore, may be mounted jointly, or each one separately, on a slider which is lengthwise adjustable on the support. If the support is in the shape of a hollow body, the slider may be arranged within the interior thereof.

Furthermore the holders 4 and 4 for the top rollers 1 and 2 may be mounted on a single double-armed lever. In such a case it is merely necessary to provide for a saddle pivotally mounted on the front arm 5 of the doublearmed lever 5, 6, both ends of said saddle carrying the holders 4 and 4 for the top rollers 1 and 2.

What I claim is:

1. In a drawing frame for a spinning machine, the combination of: supporting means, at least one doublearmed lever swingably mounted on said supporting means, a top roller mounted on one arm of said double-armed lever, the axis of said swingable mounting of the doublearmed lever being adjustable relative to said supporting means in a direction substantially parallel to the longitudinal axis of said supporting means, a lirst weighting means operatively engaged with saidlsupporting means and one arm of the double-armed lever, and a second weighting means operatively engaged with said supporting means and the other arm of the double-armed lever, said two weighting means acting on said two arms of the double-armed lever in opposite directions for subjecting same to the same direction of rotation, the points of engagement of said two weighting means with said supporting means being stationary and the points of engage ment of said two weighting means with said double-armed lever being displaceable along the latter whereby upon a displacement of said axis of said swingable mounting of the double-armed lever said axis is brought nearer to the point of engagement of one of said Weighting means wtih said double-armed lever to the same extent as it is removed from the point of engagement of the other weighting means with said doublearmed lever so that a reduction of the pressure of one of the weighting means on said double-armed lever results in a corresponding increase of the pressure of the other weighting means on said double-armed lever.

2. In a drawing frame as claimed in claim l, said weighting means including springs stationarily mounted on said supporting means and slidably engaged with said double-armed lever.

3. In a drawing frame as claimed in claim l, said weighting means including helical springs slidably engaged with said double-armed lever, and a number of guiding pins equal to the number of springs, each guiding pin being secured to said supporting means and extending substantially perpendicular to the longitudinal axis of said supporting means, and each spring being wound around one of said guiding pins.

4. In a drawing frame as claimed in claim l, each arm of said double-armed lever having a slot, said weighting means including helical springs slidably engaged with said double-armed lever, and a number of guiding pins equal to the number of springs, each guiding pin being secured to said supporting means and slidably engaged with one of said slots of the double-armed lever, and each spring being wound around one of said guiding pins.

5. In a drawing frame as claimed in claim l, said supporting means including a hollow body having an upper portion and a lower portion connected with each other, said first weighting means being engaged with said upper portion and the upper surface of one arm of said doublearmed lever, and said second weighting means being engaged with said lower portion and the lower surface of the other arm of said double-armed lever.

6. In a drawing frame as claimed in claim l, said supporting means including a hollow body, said doublearmed lever being arranged within said hollow body, said tirst weighting means including a first spring engaged with the inner upper surface of said hollow body and the upper surface of said one arm of the double-armed lever, and said second weighting means including a second spring engaged with the inner lower surface of said hollow body and the lower surface of said other arm of the doublearmed lever.

7. In a drawing frame as claimed in claim l, said supporting means including an upper portion and a lower portion swingably connected with each other.

8. In a drawing frame as claimed in claim l, said supporting means including an upper portion and a lower portion connected with each other, a shaft arranged on said double-armed lever, said supporting means having a series of notches at the engaging surfaces of said upper and lower portions, and said shaft of the double-armed lever being displaceable relative to said notches for selective engagement with a selected pair of registering notches in said upper and lower portions.

9. In a drawing frame as claimed in claim l, said supporting means having a longitudinally extending partition dividing the same` into two compartments, two double armed levers swingably and adjustably mounted on said supporting means, a pair of weighting means and a top roller associated with each of said double-armed levers, one of said double-armed levers being arranged in one of said two compartments, and the other double-armed lever being arranged in the other compartment.

References Cited in the file of this patent UNITED STATES PATENTS 2,662,249 Neu Deo. 15, 1953 6 Raible et al. Apr. 20, 1954 Dausch Nov. 16, 1954 Noguera Sept. 13, 1955 FOREIGN PATENTS France Oct. 14, 1953 France Feb. 17, 1954