US2450074A - Bobbin lifter - Google Patents

Description

' 2| 1 i 23 0 g i: I6 I p 1948. R. J. BARTHOLOMEW 2,450,074

BOBBIN LIFTER Filed Nov. 12, 1947 i l. J n

gill My lnill I llihmzllii I llllllllill INVENTOR. ROBERT J.'BARTHpLOMEW ATTORNEY.

Patented Sept. 28, 1948 BOBBIN LIFTER Robert J. Bartholomew, Philadelphia, Pa., assignor to Fletcher Works Incorporated, Philadelphia, Pa a corporation of Pennsylvania Application November 12,1?47, Serial No. 785,477 I 'tainment of a predetermined size of yarn package.

For. this purpose latches were provided, which uponreleasqpernutted spring to move the yarn package but of'engagement with the driving roll. These "and. other detector devices heretofore available have not proven wholly satisfactory under'operating" conditions.

It is the principal object of the present inven; tion to provide a bobbin lifter which is adapted to lift the bobbin out of contact with the driving .roll upon a break or reduction in tension of the yarn being wound, or upon the completion of the yarn'package.

It'is a further object of the present invention to provide a bobbin lifter which maybe installed on new machines but which is also capable of use with machines now operating, for discontinuing the rotation of the bobbin or yarn package upon a break or reduction in tension of'the yarn being wound or upon the completion of winding of the yarn package.

It is a further object of the present invention to provide abobbin lifter which is simple in construction, which is automatic in its operation, and which does not require the use of springs, springheid latches, or'the like.

It is a further object of the present invention to provide a bobbin lifter in which power from the driving roll operating shaft'of the machine on which the bobbin lifter is mounted is utilized for elevation of the yarn package.

Other objects and advantageous features of the invention will be apparent from the specification and claims.

The nature andcharactcristic features of the invention will be more readily understood from the following description, taken in connection with the accompanying drawings forming part hereof, in which:

Figure l is a front elevational view of a bobbin lifter in accordance with the present invention;

Fig. 2 is a side elevational'view thereof showing the position during the normal winding operation and showingin broken lines an intermediate Position of the; lifter mechanism 12 Claims. (crass-37) Fig. 3 is a view similar to Fig. 2 showing another position of the lifter with the yarn package in elevated position; and m Fig. 4. is an end view, enlarged, of one of the links employed in connection'with the lifter.

.It should, or course, be understood that the description and drawings herein are illustrative merely, and that variou modifications and changes may be made in the structure disclosed without departing from the spirit of the invention.

Referring now more-particularly to the drawings in which a preferred embodiment is illustrated, a fragmentary portion of the frame ill of a machine is shown, which machine may be a winding machine, a spinning machine, a doubling machine or any other machine on which a plurality of yarn packages are wound, usually with their axes horizontal and alined and in one or more rows. The

yarn packages may be of any desired type; with a bobbin or spool, and with a flange at one end, a flange at both ends, or in which no flanges are employed. Each of the yarn packages is adapted to be supported on 9, spindle I i.

The frame I0 is provided with spaced .uppe brackets i 2, each having trunnions If in which pins ll carried by spaced yarn package supporting levers I! are adapted to be pivotally mounted. The trunnions ii are of a characterto permit the removal of the plus I l and the levers i 5 supported thereby, if desired.

The lower end of the levers ii are provided with hooked portions It within which the spindle H is adapted to be removably mounted, the spindle l I providing a support for the yarn package.

The machine has mounted in the frame it thereof the customary longitudinallyextending shaft I! having thereon a driving roll it for each yarn package, the outer or peripheral face of which is adapted for engagement with the periphery of a yarn package being wound for rotating the yarn package. The shaft I1 is also provided, for each yarn package, with a cam is having at least one lobe 20 thereon for purposes to be explained.

The frame I0 is also provided with spaced lower brackets 2i, one pair for each yarn package, which brackets 2i have trunnions 22' for the reception of pins 23 carried by lifter levers 24.

Each of the lifter levers 24 has an arcuate portion 25 to the rear of the pivot pins 23 which extends upwardly and is plvotally connected by a pin 26 to a link 21 which is in turn pivotally connected by a pin 28 to one of the supporting levers it. The length of the link 21 and the 8,450,074 location of the pivot pin "are such that the pivot pin "may move past its dead center position with respect to the link I! for holding the supporting levers II in elevated position, as herematter explained.

The link 11 may be of fixed and predetermined length but as illustrated is adjustable in length. For this purpose one section 21a of the link 21 is slotted as at'i'lb and is slidably mounted with respect to the other section 21c. A screw lid is mounted in the link section 210 and extends through the slot 21b for locking the link 21 at the desired adjustment of its length.

Each of the lifter levers 24 also has a forwardly extending portion 2|, and a cross bar II is provided for connecting the forwardly extending portion a of each pair of lifter levers.

Each of the lifter levers ll also has a rearwardly disposed downward extension ll and a connecting bar 32 extends between each pair of litter levers 24. The connecting bar 3! -is' connected to the lifter levers I by screws 33 and N.

The lower brackets 2| each have rearwardly extending portions ll against which the screws 33 are adapted to abut to serve as a stop when the lifter levers It are moved to one of their positions, as illustrated more paricularly in Fig. 3.

The forwardly extending portions ll of the liftpbsitlon. .The cam It, in its rotation. engages with the end portion ll of the actuating finger l2 and the force thus applied is effective through the finger 42 and on the lifter lever 24 which is moved about the pivots provided by the pins 28. The movement of the lifter lever 24 is eflective throu h the link 21 for elevating the supporting levers II. The periphery of the yarnpackage is thus separated rrom its engagement with the driving roll it. Movement of the lifter lever it also moves the actuating finger 42 to a position out of enin Fig. 8.

er levers 24 are provided at the front ends thereof with pivot pins on which detector levers l'l are pivotally mounted. The detector levers Il support, at their outer ends, a horizontal detector bar or rod II which extends between the levers I! for each yarn package. The rear end of the detector lever :1, beyond one end ot-the yarn pack age. is pivotally connected by a pivot pin ii to a,

detector link 40, the link ll being pivotally connected by a pivot pin ll to an actuating finger 4 2. The actuatingvnnger 42 is pivotally connected to and mounte'd'at one end on the lifter lever 24 by a pivot pin 43, and has an end portion 44 which is adapted to be positioned as hereinafter ex-, .plaincd, for engagement by the cam II on the shaft 11. r

The length of the detector link I and the location of the pivot pin it are such that the pivot pin a may move past its dead center position with respect to the-detector lever ill for holding the actuating finger 42 in locked position, as hereinafter explained.

1 The mode or operation-will now be pointed out. In normal operation the yarn package is supported by the spindle II, in eng ement in thetrunnions it in the supporting levers II. and with the periphery of the yarn package in driving en gagement with the periphery of the driving roll ll. The detector bar 38 is in the uppermost po= sition, indicated in solid lines in Fig. '3, and' is heldin this position by the engagement therewith of the yarn being delivered to the peripheral surface of the yarn package.

In this position the actuating finger u is held in a position away from and out of engagement with the cam II. The lifter lever 24 is also in the position shown in solid lines in Fig. 2.

7 It the yarn should break or if the tension thereof is greatly decreased for any-reason, the detector bar as is no longer held in its uppermost position and by its own weight swings about the pivots provided by the pins 36 to a position to move the actuating finger 42 into the path of the lobe 20 of the cam it, as shown in broken lines in Fig. 2. In-this movement the lever 31 moves with respect to the link past dead center posi- Upon the swingingof' the lifter lever 24', the,

heads of the screws II engage with the underside of the lower bracket extensions 88 and limit the further movement of the lifter lever 24.

I Upon the adjustment of the tension of the yarn or upon the repair of the break, the detector bar SI and the lifter lever ll may then be swung manually by movement of the detector bar, It back to the initial position with the periphery of the yarn package again in engagementwith the periphery of the driving roll it for rotation of yarn package. The detector bar It will then be held by the tension of the yarn, as before, in its:

uppermost position. A,

.If, during .the windin predetermined amount of yarn has been delivered thereto. the elevation of; the yarn package inthe supporting levers ll tends to carry the linksjl',

upwardly and to aposition where they swing past the dead center position referred to above and separate the yarn package from the driving roll ll, thereby discontinuing rotation of the yarn package. The adjustment of the ing roll II when a predetermined size-of yarn package has been attained.- A link 21 of;pre-

determinediilxed length could be utilized where.

with a yarn package, the combination of supporting members movably mounted with respect to said frame in which a yarn package is adapted to be rotatably supported for engagement withthe driving roll, a lifter lever plvotally mounted with respect to said frame for moving said supporting members to position said yarn package out of engagement with said driving roll, a de-= tector bar in axial alinement with the yarn package pivotally mounted with respect to said lifter lever for engagement by the yarn delivered to said yarn package, said detector bar being held in one position by the tension of said yarn and being movable to another position upon release of the yarn tension. aneccentric member-carried: by said shaft, an actuating finger for 'eilecting, actuation of said lifter lever and movement ofsaid supporting members pivotally mounted on said lifter lever and movable to a position for engagement with said eccentric member, and

- members connecting said detector bar and said v actuating finger-for positioning saidactuatingticn so that the actuating finger 42 is locked in i'inger for engagement by said eccentric member a length of the link ll permits of discontinuance of driving by the driv-.

for a yarn winding ma-- I upon movement of said'detector bar to said other position.

-2. In an attachment for a yarn winding machine having a frame and a horizontal shaft with a'driving roll for peripheral driving engagement with a yarn package, the combination of supporting members movably mounted with respect to said frame in which a yarn package is'adapted to be rotatabiy. supported for engagement with the driving roll, a lifter lever pivotally mounted with respect to said frame and connected to said supporting members for elevating said supporting members and separating said yarn package from engagement with the driving roll, a detector bar in axial alinement with the yarn package pivotally mounted with respect to said lifter lever for engagement by the'yarn delivered to said yarn package, said detector bar being held in an upward position by the tension of said yarn and-being movable to a downward position upon release of the yarn tension, an eccentric member carried by said shaft, an actuating finger for said lifter lever" pivotally mounted'on said lifter lever and movable to a position for engagement with said eccentric member, and members connecting said detector bar and said actuating finger for positioning said actuating finger for engagement by said eccentric member upon movement of said detector bar to its downward position.

:3. In an attachment for a yarn winding machine having a frame and a horizontal shaft with a'driving roll for peripheral driving engagement with a yarn package, the combination of supporting members movably mounted with respect to said frame in which a yarn package is adapted to be rotatabiy supported for engagement with the driving roll, a lifter lever pivotally mounted with-respect to said frame and connected to said supporting members for moving said supporting members to a position for separating the yarn package from the driving roll, members for retaining said supporting members in said position,

a detector bar in axial alinement with the yarn package pivotally mounted with respect to said lifter lever for engagement by the yarn delivered to said yarn package, said detector bar being held in one position by the tension of said yarn and being movable to another position upon release of the yarn tension, an eccentric member carried by said shaft, an actuating finger for effecting actuation of said lifter lever pivotally mounted on said lifter lever and movable to a position for engagement with said eccentric member, and members connecting said detector bar and said actuating finger for positioning said actuating finger for engagement by said eccentric member upon movement of said detector bar to said other position.

4. In an attachment for a yarn winding machine havin a frame and a horizontal shaft with a driving roll for peripheral driving engagement with a yarn package, the combination of supporting members movably mounted with respect to said frame in which a yarn package is adapted to be rotatably supported for engagement with the driving roll, a, lifter lever pivotally mounted with respect-to said frame and connected to said supporting members for moving said supporting members to a position for separating said yarn package from said driving roll, a detector bar in axial alinement with the yarn package pivotally mounted with respect to said lifter lever for engagement by the yarn delivered to said yarn package, said detector bar being held in one position ,engagement by said eccentric member upon movement of said detector bar to said other position 5. In an attachment for a. yarn winding machine having a frame and a horizontal shaft with:

a driving roll for peripheral driving engagement with a yarn package, the combination of lever members connected for movement in unison'pivotally mounted with respect to said; frame and in which a yarn package is adapted to be rotatably supported for engagement with the driving roll a lifter lever pivotally mounted with respect to said frame, a link connecting one end of said lifter lever and said lever members, detector bar levers pivotally mounted on the other end of said lifter lever, a detector bar between theends of said detector levers and in axial aiinement with the yarn package for engagement by the .yam delivered to said yarn package, said detector bar being held in an upward'position by thetension of said yarn and being movable to a downward.- position upon release of the yarn tension, an edcentric member carried by said shaft, an actuating finger for moving said lifter lever pivotally mounted on said lifter lever and movable-to a. position for engagement with said eccentric meme her. and a link connecting said detector bar levers and said actuating finger for positioning said. actuating finger for engagement by said eccentric 1 member upon movement of said detector bar to. its downward position. 1

6. In an attachment for a yarn'winding ma-, chine having a frame and a horizontal shaft. with a driving roll for peripheral driving engagement with a yarn package, the combination, of-

supporting members movably mounted'withrespect to said frame in which a yarn package is adapted to be rotatabiy supported for engagement with the driving roll, a lifter lever for posi, tion-ing said supporting member pivotally mountq ed with respect to said frame, connections between said lifter lever and said supporting members for holding said supporting members and maintaining said yarn package out of engagement with said driving roll, yarn tension controlled members carried by said lifter lever, an

- eccentric member carried by said shaft and engageable by one of said yarn tension responsive members upon release of the yarn tension for effecting actuation of said lifter lever and movement of said supporting members to position saidyarn package out of engagement with said driving roll, said yarn package being adapted upon its completion to actuate said connections to hold said package out of driving engagement with the driving roll.

7. In an attachment for a yarn winding machine having a frame and a horizontal shaft with a driving roll for peripheral engagement with a yarn package, the combination of supporting members movably mounted with respect to said frame in which a yarn package is rotatabiy mounted for engagement with the driving roll, means responsive to the release of the tension of the yarn delivered to the yarn package for moving said supporting members to a position to separate the yarn package from engagement with the driving roll, said means'including a lever pivotally mounted with respect totsaid frame and a link member interposed between said supporting members and said lever, said link member being of predetermined length for controlling the sike of the-yarn package by the separationof amen v f r v which a yarn package engagement'withthe driving roll, and means for separating said yarn package from driving enl kement with said driving roll including a lever member pivotally mounted with respect to said frame. and a link member interposed between said lever member and said supporting members, said link member being of'predetermined length the yarn delivered to the yarn package for movir'lg said supporting member; to a position to s separate the yarn package from engagement with the driving roll, said means including a lever pivotally mounted with respect to said frame and a link member interposed between said supporting members and said lever. said link-member being adjustable in length for controlling the size of the yarn package by the se aration of said package from the driving roll.

9. In an attachment for a yarn winding ma.

chine having a frame and a horizontal shaft with a driving roll for peripheral engagement. witha yarn package. the combination of a pair of supporting members plvotally movable with respect to said frame and having outer end portions in which a yarn package is rotatably mounted for engagement with the driving roll, and means for f separating said yarn package from driving engagement with said driving roll including a pair of spaced lever members pivotally mounted with respect to said frame, and a pair'of link members each of which is interposed between one oi v said lever members and one of said supporting members, said link members being of predetermined length for controlling the size of the yarn package by the separation ofsaid package from 45 rationof said porting members pivotally movable with respect to said frame and having outer end portions in {are controlling the sins of. the yarn package by roll. I 11. In an attachment for a yarn winding machine having a frame and a horizontal shaft with a driving roll for peripheral engagement with a yarn package. the combination of supporting members plvotaliy movable with respect to said frame and having outer end portions in which a yarn psckage'is rotatably mounted for engagement with the driving roll. and means for separating said yarn-package from driving engagement with said driving roll including a lever member pivotally mounted with respect to said frame, and a link member interposed between said lever member and said supporting members, the combined lengths of said link member and lever member controlling the size of the yarn package by the separation of said package from the driving roll.

12. In an attachment for ayarn winding machine having a frame and a horizontal shaft with a driving roll for peripheral engagement with a yarn package. the combination of supporting members 'pivotally movable with respect to said frame and having outer end portions in which a yarn package is rotatably mounted for engagement with the driving roll, and means for sens-- rating said yarn package from driving engagement with said driving roll including a pair of lever members pivotally mounted with respect to said frame. and link members interposed between each of said lever members and one of said supporting members. the combined lengths of each pair of said link member and lever member con-- trolling the size of the yarn package by the sepapackage from the driving roll.

ROBERT J. BAR'I'HOLOMEW.

No references cited.

is rotatably mounted for separation of said package from the driving

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