USRE21995E - Spool snubber - Google Patents

Description

Jan. 6, 1942 1": MUELLER SPOOL SNUBBER Original Filed July 9 IN VENTOR.

ATTORNEY.

Reissued Jan. 6, 1942 SPOOL SNUBBER Carl E. Mueller, Milwaukee, Wis., assignor to General Printed String Company, Milwaukee, Wis., a corporation of Wisconsin Original No. 2,152,909, dated April 4, 1939, Serial No. 89,798, July'9, 1936. August 17, 1940, Serial No. 353,131

14 Claims.

This invention relates to improvements in spool-snubbing devices.

It is the principal object of this invention to provide for twine spools, snubbing means which will permit free rotation of the spool when twine is being pulled therefrom, thereby offering a minimum resistance to removal of the twine from the spool, and which will immediately stop rotation of the spool when the twine is not being pulled therefrom, thereby preventing further removal of the twine from the spool.

More specifically, it is an object to provide a gravity-operated snubber engageable with the spool flanges and disengageable therefrom by means of the twine when the latter is being pulled from the spool, the snubber being immediately engageable with the flanges when the pulling force is no longer exerted upon the twine.

In the drawing:

Fig. 1 is a top plan view of an embodiment of this invention, a portion being broken away.

Fig. 2 is a view in side elevation, partly in section, of the device shown in Fig. 1.

Fig. 3 is a view in end elevation of the same device.

Throughout the several views like parts are identified by the same reference characters.

The spool holder comprises a base I and a pair of uprights 2 in spaced relation to each other, and pivots l threaded through the uprights at l3 and each provided with a knurled flange 3. As shown in Fig. 2, the uprights are secured to the base I by. means of stud bolts [4.

Each of the uprights 2 is provided at its upper end directly above the pivot 4, with a pin 8 upon which is mounted the U-shaped snubbing memher I. The intermediate portion 6 of the U- shaped member I which projects across the spool is provided with a. pair of rubber snubbing shoes 9 which engage the flanges on the spool 5.

The spool 5 is rotatably mounted upon the pivots 4, which latter may be adjusted in their respective uprights 2 by manual rotation thereof through the knurled flanges 3.

The spool 5 has been illustrated in broken lines and as shown in Fig. 3, the twine I2 is also shown in heavier broken lines as it comes from the spool. This twine l2 passes beneath the portion 6 of the U-shaped snubbing member I and when pulled from the spool, will lift the snubbing member vertically about its supporting pins 8. However, this vertical movement is limited by means of a pin I0 shown on the left-hand upright the spool flanges.

Application for reissue will be moved away from the spool flanges and permit the spool 'to be rotated by pulling the twine I2 therefrom.

A feature of the invention above described resides in the manner in which the snubbing shoes 9 cooperate with the flanges 5 of the spool. As clearly shown in Fig. 3, the arms of the snubbing member I extend downwardly from the pivot pins 8 and across the horizontal plane passing through the axis of the spool. Thus the snubbing shoes 9 are disposed in a position relative to the flanges 5 which produces a true snubbing action upon the spool as distinguished from a braking action.

It will be noted that the pivot or pin 8 for the snubbing members 1 is positioned between the axis of the spool 5 and the periphery of the spool flanges and that the snubbing shoes 9 move in an are about the pin 8 which intersects the periphery of the spool flanges. As a result, a biting action of the shoes 9 upon the periphery of the spool flanges is performed when the snubbing member is free to engage the spool flanges.

As soon as the pulling force upon the twine I2. is relieved, the twine becomes sufii'ciently slack due to the rotation of the spool 5 and permits the U-shaped snubbing member 7 to drep vertically until the snubbing shoes 9 are en aged with Immediately upon engagement of the snubbing shoes- 9 ith the spool flanges, the rotation 01 the-S am is immediately pp and no f r slack allowed in the twine. v

The snubbing Oh of the shoes 9 is rendered mor efficientn previous prior art devices of this Class by Btson of the fact that the point of eng gement of the shoes 9 with the flanges 5 and the p 8 are sposed on opposite sides of the hOriZOntal plane passing through the axes of the pivots 4 and antially normal to the vertical plane which p s s through the axes of the pivots 4 and p n "this structure the flanges on the $19001 W otating in a counter-clockwise d rec n relative o Fig. 3, exert "a tangentially dire e force inst the snubbers or snubbin shoes 9 when friotior engaged vtherewith, and the U'member d pins 8 react through the shoes 9 against th tangentially directed. force so that the resulta f rce. d r d by these component forces is directed toward the interior of the circles defir the Spo01 flanges. Consev quently, the snulq engage theflanges positively and with 5a minimum slipp btween them. In other words, t 5 1 is positively and instantly stoppedi fl ubbers engage its flanges.-

It will be noted that pins H are provided beneath the pivots 4 and similarly located relative to the pivots i as the pins 8. The reason for providing these pins H is for mounting the U- shaped snubbing member 1 thereon, when the spool support is mounted in an inverted position. That is, as shown in the drawing, the spool support is mounted with the base beneath the spool, but there are locations where this device is used which necessitate mounting of the base above the spool 5. In such case, the snubbing member 1 would then be mounted upon the pins II. It is deemed unnecessary to show this arrangement, because the operation of the device would be exactly the same as the operation heretofore described.

From the foregoing, it will be apparent that I have provided a spool snubbing device which is automatic in its snubbing movements and which in nowise interferes with rotation of the spool when twine is being pulled therefrom.

It will also be obvious from the foregoing that the invention herein described is simple in combination and therefore may be manufactured and assembled cheaply.

I claim:

1. In a spool holder, a supporting member having a pair of relatively spaced bearing supports, a twine bearing spool rotatably mounted on the bearings, and a spool snubber movable about a b pivotal axis above said bearings, said snubber being normally engaged with the spool below a horizontal plane passing through the axis of said bearings and being automatically disengageable therefrom when rotative power is applied to the spool, by means of said twine, said twine being operative to disengage said snubber and said snubber being automatically engageable with the spool when said rotative power is not applied to said spool.

2. In a spool holder, a supporting member having a pair of relatively spaced bearing supports including spindles, a twine spool rotatably mounted on the spindles, a pivot on each of said bearing supports above the spindles thereof, and

a, snubber mounted on said pivots and having a portion n rmally engaging at least one of the flanges on said spool below the axis of said spool and extending across the spool to be engaged by said twine when the latter is being removed from the spool, thereby to remove the snubber from said flange.

3. In a spool holder, a supp i member having a pair of spaced bearing supports, each provided with a bearing spindle, a a ed twine spool rotatably supported by said spindles, a pivot positioned above said spind and b tween the axes of said spindles and the periphery of the spool flanges, and a snubbe un d O Said pivot and normally engaging Said D W a horizontal plane extending th u h he xes of said spindles and having a twine-engaging P t'ion, whereby said snubber w l be e fil b e from said spool whey, in; twine is pulled therefrom; i s

4 'In a spool holder, a, supp member hava p i of spaced bearing s p s, each p evided with bearing spindle, a flanged twine spool rotatably Supported id spindles, a pivot positioned above said Spindles and between the axes o i Spindles and the"; periphery the Sp001Iflange-5 a snubber ted on said-pivot and normally engaging Said ,ool below a horizontal plane extending through-l theaxes of said a twineg portion,

p dles and having whereby said snubber will be disengageable from said spool when the twine is pulled therefrom, and means limiting spool-disengaging movement of the snubber.

5. In a spool holder, a supporting member having a pair of spaced bearing supports, each provided with a bearing spindle, a flanged twine spool rotatably supported by said spindles, a pivot on each of said bearing supports having its pivotal axis above the axes of said spindles, a U-shaped snubber bar member mounted on said pivots and extending around said spool, said bar member normally engaging the flanges on said spool below a horizontal plane passing through the axes of said spindles, and twine on said spool extending therefrom and engageable with said bar member to remove the latter from the flanges when the twine is being drawn from the spool.

6. In a spool holder, a supporting member having a pair of spaced bearing supports, each provided with a bearing spindle, a flanged twine spool rotatably supported by said spindles, a pivot on each of said bearing supports having its pivotal axis above the axes of said spindles, a U- shaped snubber bar member mounted on said pivots and extending around said spool, said bar member normally engaging the flanges on said spool below a horizontal plane passing through the axes of said spindles, twine on said spool extending therefrom and engageable with said bar member to remove the latter from the flanges when the twine is being drawn from the spool, and stop means limiting flange-disengaging movement of the bar member.

7. In a spool holder, a supporting member having a pair of spaced bearing supports, each provided with a bearing spindle, a flanged twine spool rotatably supported by said spindles, a pivot on each of said bearing supports having its pivotal axis above the axes of said spindles, a U- shaped snubber bar member mounted on said pivots and extending around said spool, said bar member normally engaging the flanges on said spool below a horizontal plane passing through the axes of said spindles, and twine on said spool extending therefrom and engageable with said bar member to remove the latter fromthe flanges when the twine is being drawn from the spool, said bar member being provided with snubbing pads for engaging said flanges.

8. In a spool holder, a supporting member having a pairof spaced bearing supports, each provided with a bearing spindle, a flanged twine spool rotatably-supported by said spindles, .a :pivot on each of said bearing supports having its pivotal axis above the axes of said spindles, a U- shaped snubber bar member mounted on said pivots and extending around said spool, said bar member normally engaging the flanges on said spool below a horizontal plane passing through the axes of said spindles, twine on said spool extending therefrom and engageable with said bar member to remove the latter from the flanges when the twine is being drawn from the spool, and stop means limiting flange-disengaging movement of the bar member, said bar member being-provided with snubbing pads for engaging said flanges.

9. In a spool snubbing device, the combination with a pair of spaced upright bearing supports and a flanged spool rotatably mounted on said supports, of a U-shaped snubbing member having its arms pivotally mounted on said supports above-the axis of rotation of said spool and extending downwardly across a horizontal plane extending through said axis, said member having a snubbing portion normally engaged with said flanges on said spool below said plane.

10. In a spool holder, the combination with a twine-bearing spool having a circular brakeflange rotatable therewith about a common axis and intended normally to rotate in one direction only, of a snubber element and a support for said snubber element operative to permit said snubber element to be moved into and out of frictional engagement with the peripheral surface of said brake-flange, said brake-flange exerting a tangentially directed force against said snubber when engaged therewith and rotating in said direction, said support being operative, when said snubber is engaged with said brake-flange, to re act through said snubber against said tangentially directed force in such direction that the resultant force, engendered by said tangential and reacting components of force, is directed through said snubber from the exterior toward the interior of the circle defining said peripheral sur face, and snubber actuating means disposed in the path of withdrawal of twine carried by the spool for moving the snubber from engagement with the flange during withdrawal operations and permitting engagement of the snubber and flange when withdrawal operations cease.

11. In a spool holder, the combination with a twine-bearing spool having a circular brakeflange rotatable therewith about a common axis and intended normally to rotate in one direction only, of a snubber element and a support for said snubber element operative to permit said snubber element to be moved into and out of frictional engagement with the peripheral surface of said brake-flange, said brake-flange exerting a tangentially directed force against said snubber when engaged therewith and rotating in said direction, said support being operative, when said snubber is engaged with said brake-flange, to react through said snubber against said tangentially directed force in such direction that the resultant force, engendered by said tangential and reacting components of force, is directed through said snubber from the exterior toward the interior of the circle defining said peripheral surface, snubber actuating means disposed in the path of withdrawal of twine carried by the spool for moving the snubber from engagement with the flange during withdrawal operationsand permitting engagement of the snubber and flange when withdrawal operations cease, and a stop defining the limit of movement of the snubber member out of engagement with the brakeflange.

12. In a spool holder, the combination with a twine-bearing spool having a brake-flange rotatable therewith about a common axis and intended normally to rotate in one direction only, of a snubber element and a support therefor operative to permit said snubber element to be moved into and out of frictional engagement with said flange, said flange exerting a force against said snubber when engaged therewith and rotating in said direction, said support being operative, when said snubber is engaged with said flange, to react through said snubber against said force in such direction that the resultant force, engendered by first mentioned force and reacting components, is directed toward said flange to increase the frictional engagement with said flange, and snubber actuating means disposed in the path of withdrawal of twine carried by the spool for moving the snubber from engagement with the flange during withdrawal operations and permitting engagement of the snubber and flange when withdrawal operations cease.

13. In a spool holder, the combination with a twine-bearing spool having a circular brakeflange rotatable therewith about a common axis and intended normally to rotate in one direction only, of a fulcrum spaced from the axis of rotation or said flange, a lever mounted on said fulcrum, a snubber carried by said lever and frictionally engageable with the peripheral surface of said flange, said snubber engaging said surface at a point where said surface moves toward the plane intersecting said axis and fulcrum when said spool and flange are rotating in the aforesaid normal direction of rotation, and snubber actuating means disposed in the path of withdrawal of twine carried by the spool for moving the snubber from engagement with the flange during withdrawal operations and permitting engagement of the snubber and flange when withdrawal operations cease.

14. In a spool holder, the combination with a twine-bearing spool having a circular brakeflange rotatable therewith about a common axis and intended normally'to rotate in one direction only, of a fulcrum spaced from the axis of rotation of said flange, a lever mounted on said fulcrum, a snubber carried by said lever and frictionally engageable with the peripheral surface 'of said flange, said snubber engaging said sur face at a point where said surface moves toward the plane intersecting said axis and fulcirum when said spool and flange are rotating in; the aforesaid normal direction of rotation, ubber actuating means disposed in the path of t drawal of twine carried by the spoojl for moving the snubber from engagement w t th flange during withdrawal operations eg rmitting engagement of the snubber an flange when t drawal operations cease 'and a stop defining the limit of movement l the snubber out of engagement with said flan CARL E. MUELLER.

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