US2518417A - Governor for slasher winding - Google Patents

Description

Aug. 8, 1950 J. A. CARRIER GovERNoR Fon sLAsHER WINDING Filed April 1, 1948 2 Sheets-Sheet l Svi mm R Tw r M r V m mm 4m. m E J J. A. CARRIER GOVERNOR FOR SLASHER WINDING Aug. 8, 1950 Filed April '1, 1948 2 sheets-sheet 2 ww @n E.

Patented Aug. 8, 1950 GOVERNOR FOR SLASHER WINDING Jmph aurea cnn-1er, Montreal, Quebec, canada, assignor to Dominion Textile Company Limited, Montreal, Quebec, Canada, a' corporation of Canada application Api-u 1, 194s, serial No. 18,409 In Canada February 13, 1948 3 Claims. (Cl. Z8-36) Introduction This invention relates tov textile machines and more particularly to a tension actuated slasher beam speed control.

Prior art Warp slashing is a preliminary step in the preparation of warp yarns prior to weaving, and one of the important steps in slashing is the windweaving. It is important that the yarn be wound on the beam at an even tension so as to prevent undue stretching or slackness.

In winding warp onto the beam, an apparatus is used which is capable of varying the axial speed of the beam so as to maintain a, substantially constant peripheral speed. thus compensating for the increase of the diameter of the wound on yarn. This is generally accomplished by reacting the tension placed on the yarn by the pull exerted by the winding beam on a. speed controlled mechanism so that any fluctuation in this tension is reilected in opposite fluctuation in the beam speed. More specifically, mechanisms of this type generally employ a leverly mounted roller which is counter-balanced against the normal pull of the yarn guided over itin a circuitous path on its way to the beam. The lever is connected with a beam speed compensating device, for example a clutch, between the drive source and the beam which is adapted to compensate for the increased pull placed upon the yarn by the increased diameter of the wound on yarn" on the beam.

A problem involved in the operation of an apparatus of this nature is that the "angle of pull from the guide roller to the beam changes as the diameter of the "wound on yarn" increases which introduces a mechanical variable into the pull of the yarn. The reaction on the roller becomes increasingly less as the yarn builds up on the beam. so that correspondingly less slackening of speed is had with consequent greater pull on the yam and greater stretching, so that the unevenness inthe yarn carries through to the weaving operation.

A Obiects The present invention deals fundamentally withthis problem and aims to provide a practical In accordance with the invention as apparatus of the above type is provided with a roller adapted pensating roller and the beam such that the compensating roller and the xed roller cause the yarn to move therebetween in a path substantially perpendicular to the plane passing through the pivotal axis of the lever on which the guide roller is mounted and the axis of the compensating roller.

More specifically, the invention involves a coinbination ofa 'particular apparatus in which the mg of the warp yam on a beam' preparatory to 1.0 compensating roller is mounted on the relatively long arms of a pair of spaced apart bell cranks. Connecting the opposite arm of one of the bell cranks to the clutch mechanism, is a mechanical linkage, which for example may be constructed of l5 an opposed bell crank linked by connecting rods from the roller supporting cranks to' a counterpoise arm upon which an adjustable weight is adapted to counterbalance the normal tension required on the yarn.` A'link, which preferably 2 consists of a'rocker arm connected to the counterpoise arm by a rod and to the clutch actuator by an anchored spreader assembly, is adapted to convey pull, over and under normal, to the clutch to compensate the speed of the beam according to the tension of the yarn on the compensatingv roller.

The, drawings f The nature of the invention will be more readilyY understood from the followingdetailed description when read in conjunction with'v'the accompanying drawings, inwhich: H f w Figure 1 illustrates in side elevation a preferred the preferred embodiment. shown injFigure 2.y

40 Figure 4 illustrates in plan view the portion of the linkage adapted toy transfer the tension of the yarn to the friction lever of the clutch.

Figure 5 diagrammatically illustrates the'substantially small change in the angle of pull" of the yarn from the compensating roller to the guide roll.

Detailed description Referring to the drawings, the member yI Il designates generally the frame at the delivery end of a yarn Slasher, and I2 designates the yarn as it is drawn from the slasher to be wound von the power driven beam I4. The member I6 designates the diameter of the shank of the beam.

to be placed in a xed position between the com- Il while i3 designates the diameter 0f the ya@ when the beam I4 is fully wound. A pair of friction rollers 20 and 22 are adapted, in conven tional slashers, to guide the yarn I2 onto the beam I4. So far the apparatus is conventional, and found on the majority of slashers.

A preferred manner of constructing the herein described tension operated beam speed governor is as follows:

Pivotally mounted on a pair of spaced apart brackets 24 are a pair of bell cranks 26 which are adapted by means of a xed axle 28 to pivot together about the axis 3l'. Rotatably mounted between the ends of the cranks arms 32 which preferably may extend on a horizontal plane from the axis 30, is a compensating roller 34. The yarn I2 is adapted tol pass under the roll 22 and over the roller 34. a

An idler roll 36, mounted on a pair of spaced apart brackets 38 is adapted to lead the yarn I2 oi! the roll 34 at an angle of substantially 90 depending on the leverage arc, through which the roll 34 is adapted to travel about the leverage axis 30. 'I'hus the angle of pull exerted by the yarn I2 on the lever arm 32 is maintained substantially at a constant, whereas if the yarn was led oil' at a distinctly acute or obtuse angle, the angle of pull would vary to an appreciable amount thereby affecting the operation of the clutch mechanism which will be explained later.

The other arm 40 of ,one of the bell cranks 26, which by choice is 'shorter than the arm 32 and extends at substantially rightangles to the arm 32, .is pivotally connected by means of a connecting rod 42 to one arm 44 of a bell crank 46 which is pivotally mounted at 48 to a bracket 50 extending from'the frame I0 of the slasher. The co-acting arm 52 of the bell crank is pivotally connected to a counterpoise arm 54 by a connecting rod 56. Said counterpoise arm 54 is pivotally mounted at 58 to the frame I0, and has slidably adjustable on its length, a weight 60. An arm 62 rigidly ilxedvto the arm 54 is pivotally connected by means of a tie rod 64 to a rocker arm 66 which is pivotally mounted at 68 to the slasher frame I0. A tie rod 10 is pivotally connected at one end to the opposite end ofthe tie rod 10 is pivotally connected at 14 to a pair of outwardly extending rods 'I6-18. One of these rods, namely 16 as illustrated, i; pivotally mounted to an anchor 80 suitably attached to an extension of the slasher frame I0. The oppositely extending arm 'I8 is pivotally connected at 82 to a member 84which is slidably ,mounted on the frame I by means of a slot 86 and a bolt 88. The sliding member 84 is pivotally-and adjustably connected to a friction lever 90 by means of a collar 92 which is positioned on a threaded'portion 84 of the member 84 by a pair of nuts 98-88.

The opposite end of the lever 90, which may be of bifurcate formation as-illustrated, is an- -chored at |00 by any suitable means so that motion supplied to the member 90 is carried by means of a suitable connection at I 02 to one side of a friction clutch designated by |04. Said friction clutch |04 is disposed between the beam |04 and its source of driving power '|06, which may, as illustrated, be a belt drive.

Operation 'From the foregoing detailed description it is understood that any increase or decrease in pull, above or below the normal, on the yarn I2 is mechanically transmitted from the leverly mounted end of the rocker arm 66 at 12, and the other roll 34 to the friction clutch |04, thereby 'gby adl compensating roller 34 to the friction lever 90 l which actuates the clutch allowing slipping, thereby slowing down the speed of the beam.

With.. particularreference to Figure 4 of the drawings, A-A denotes a plane passing through the pivotal point 30 of the lever arm 32 and the axisV 3| of the compensating roller 34, from which the yarn I2 is vled at 90 from the roller 34 to the roll 36 and on the beam I4.

As the operation of the clutch |04 may be adjusted to operate with less than 10 degrees pivoting of the lever arm 32, it is readily seen that the angle or pullr varies very little from the throughout the winding of a beam as illustrated by the angle C. If the lever arm 32 is set to pivot between the two extremes ofA-A and B--B more even operation is secured, because the angle of pull will vary more per degree of pivotal movement of the armL 32 as it approaches the roll 38. f

For illustrative purposes, the angle D shows the change in the angle of pull from an empty beam I6 to a full beam I8. when the path of the yarn I2 isnot controlled by the roll 36.

The sub-titles used throughout the specification are merely to simplify reference thereto and should otherwise be disregarded.

Iclaim:

l. An apparatus adapted to control the speed of a power driven slasher Winder beam so as to exert a constant tension on yarn delivered from a slasher -to said beam, said beam being rotatably mounted adjacent the delivery end of a slasher frame, said apparatus comprising, a friction clutch disposed between said winder beam and power source, a xed guide roll mounted parallel to said Winder beam axis and extending across said slasher frame, a pair of bell cranks pivotvally mounted on said slasher frame, one adjacent each side, a compensating roller mounted between one pair of arms of said bell cranks and extending across said frame parallel to the axis of said guide roll, counter balanced linkage means between said bell cranks and clutch, whereby yarn delivered from said slasher passes over said compensating roller and under said guide roller to said winding beam in a path substantially parallel to a plane passing through the pivotal points of said bell cranks and the axis of said compensating roller so that the angle of pull is not changed substantially by the diameter of wound on yarn of the beam and increase in tension on said yarn is adapted to actuate said compensating roller and clutch so as to produce a compensating decrease in said Winder beam speed.

2. An apparatus, as claimed in claim 1, including a'third bell crank, a connecting rod between said first pair of bell cranks and said third bell crank and linkage means including a counter balance between said third' bell crank and said friction clutch whereby increased pull on the yarn as caused by the increased diameter of wound on yarn on the Winder beam is transmitted from said compensating roller to main- 16 tain a constant tension on the yarn.

3. An apparatus adapted to control the speed of a power driven slasher -winder beam so as to exert a constant tension on yarn delivered from a slasher to said beam, said beam being rotatably mounted adjacent the delivery endI of l a slasher frame, said apparatus comprising, al

friction clutch disposed between said Winder beam and power source, a iixed guide roll mounted parallel to said Winder beam axis and extending across said slasher frame, a pair of bell cranks pivotally mounted on said Slasher frame, one adjacent each side, a compensating roller mounted between one pair of arms of said bell cranks and parallel to the axis of said guide roller, a third pivotally mounted bell crank, a connecting rod between one of the other arms of said rst named pair of bell cranks to one arm of said third bell crank, a Weight beam having an adjustable mounted weight thereon pivotally mounted at one end, a connecting rod ad- Joining the other arm of said third bell crank to the Weight beam between said pivotal point and said Weight, a projecting member rigidly fixed to said Weight beam and extending at substantially right angles therefrom, a pivotally mounted rocker arm, a connecting rod pivotally joining said projecting member at one end of (to said friction clutch to reduce the speed of said Winder beam and compensate for said increase in tension.

JOSEPH CARRIER.

REFERENCES CITED The following references are of record in the iile of this patent: Y

UNITED STATESl PATENTS Number Name y Date 557,468 Woodman Mar. 31, 1896 1,653,397 Gowan Dec.- 20, 1927 1,781,817 Kenyon Nov. 18, 1930 1,783,779 Draper Dec. 2, 1930 Oemichen Dec. 30, 1930

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