US2122989A

US2122989A - Yarn clearer

Info

Publication number: US2122989A
Application number: US89915A
Authority: US
Inventors: Burt A Peterson
Original assignee: Barber Colman Co
Current assignee: Barber Colman Co
Priority date: 1936-07-10
Filing date: 1936-07-10
Publication date: 1938-07-05
Anticipated expiration: 1955-07-05

Description

y 5, 1938- B. A. PETERSON 2,122,989

YARN CLEARER Filed July 10, 1936 3 INVENTOR .B ur-t A. Peterson ATTORNEYS a... iii; 193 9 1 2,122,989

." .u:m rao s ra rizs r T-ENT OFFICE Application July 10, 19st, Serial No. 89,915 r Glaims. (or. 28-88):

The invention pertains to yam clearers for use from ;which a thread or yarn 8 passes through in connection with winders or spoolers, and the the yarn clearer generally designated 9, and from general object of the invention is to provide an thence partially around a winding drum l and improved yarn clearing device which is capable onto a cheese H.

of eflfectualiy clearing the thread or'yarn of par- 'Thedevice t comprises a stationary'grip plate ticles of fiber, leaf and other extraneous matter, 12, preferably providing a smooth flat surface andwhich is operative automatically to effect over which the yarn passes; and a sensitive breakage of the thread or yarn to prevent 'pasgripping element in the form of a blade H1 insage of gouts or other enlargement onto the clined toward the plate I! in the direction of ap- 1o cheese being wound. proach of the yarn, and swingably supported Another object is to provide a yarn clearing with its gripping edge spaced from the guiding device having a highly sensitive means for gripsurface of the plate H a distance determined by ping the yarn to break the same in order to pre-- the thickness of the yarn. vent passage of a gout, which is adjustable to As. herein shown, the plate.l2 is formed by a vary'the degree of sensitivity according to the vertical leg of a horizontal angle bar 84 having kind and size of the yarn being wound. one end suitably secured to the base l5 of a gen:

Another object is to provide a yarn clearing erally U-shaped frame l6 having two laterally device of improved construction whichis adjustspaced standards ii. The other end of said bar able for difierent sizes of yarn, and which is projects laterally to one side of said frame, which adapted for automatic operation by the winder similarly supports a plurality of stationary yarn mechanism to release the yarn in the event that guiding pins it in vertically spaced relation, four it has been caught or gripped bythe operation such pins being herein shown. The three upper of the device in preventing the attempted passage pins are adapted to cooperate with two prongs of a gout or other enlargement. IQ of a thread detector forming part of the 1 The objects of the invention thus generally winder mechanism, and the two lower pins serve 25 stated together with other and ancillary advanto guide the yarn for passage over the smooth tages are attained by-the construction and arsurface of theplate l2 and between said surface rangement set forth by way of illustration in the and the lower free edge of the blade i3 which is accompanying drawing, in which: A inclined downwardly toward the plate.

0 Figure 1 is a fragmentary side elevational view 7' The supporting structure further includes as of the improved yarn clearing device shown in its herein shown, two interfitting U-s haped plates relation to the'winder mechanism. 20 and 26 (Fig. 2) suitably mounted on a station- Fig. 2 is an enlarged end'elevational view of I ary member 22 of the winder and carrying the the device as shown in Fig. 1 and illustrating U-shaped frame it, the base member iii of the manner in which it is mounted on the framewhich is secured to the upper plate 20 at one end 35 work of the winder mechanism, which framework and rearwardly thereof. The opposite ends .of l is shown in section. I 4 said plates 20 and 2| have extensions 2!! and Fig. 3 is a front elevational view of the device. 1'! projecting laterally beneath the lowermost Fig.4 is a fragmentary vertical sectional view pin i8 and respectively providing opposed vertitaken approximately in the plane of line 4-4 of cally spaced

thread guiding surfaces

23 and 24, 40

Fig. the lower one of which is formed by the rear end Fig. 5 is a fragmentary sectional view on an of a forwardly opening slot in the plate 'extenenlarged scale, taken approximately in the plane sion 2|.

of line 5--5 of Fig. 3 and illustrating the opera- The means for pivotally supporting the blade tion of the device in severing the yarn as an incil3 comprises a pair of pivot points 25 and 26 -45 dent to the attempted passage of an enlargement (Fig. 3) engaging in small-recesses in the oppothereon. site side edges of the blade. In the preferred The improved yarn clearer is adapted for use construction the blade is carried'by a rock shaft in variousforms of winders or spoolers, but is 21 suitably journaled in the frame members I1 particularly adapted for use in connection with somewhat above and in rearwardly spaced rela- 50 an automatic winder of the type disclosed in the tion to" the plate It. One end of this shaft '-pro- Colman Patents Nos. 1,267,977 and 1,274,386, jects laterally from' its supporting frameparallel granted May 28, 1918 and August 6, 1918, reto the angle bar It, and this projecting end porspectively. In Fig. 1 I have shown the general tion is cutaway on its under side to form a notch relationship of the parts. 1 designates a bobbin 28 so as to accommodate the

pivot points

25 and 26 which are mounted in the-opposite ends of the notch coaxially of the shaft. As clearly shown in Fig. 6, the notch 2| opens in a gen- .erally downward direction with the bottom face thereof inclined downwardly in the direction of the plate II. N

ards ll of thei'frame It. The rear leg of this clip has its lower end shaped to provide a flat lip portion 33 yieldably engaging a flat side 34 formed .rearwardly of the shaft 21. Preferably the lip portion 33 of the clip is disposed angularly relative to the bottom of the notch 34 so as to engage therewith below the axis of the shaft, thereby exerting a constant turning force on the shaft in a direction to hold the crank arm 28 against the screw 30.

It will be observed that the blade [3 is pivotally supported upon the shaft in a manner such as to permit free turning movement thereof through a limited extent which in the present instance is sufficientto permit movement of the lower free edge of the blade to perform its thread-gripping function in cooperation with the plate. Normally the upper rear end of the blade is yieldably held in engagement with a stop or abutment 28 formed by the upper rear portion of the bottom 01. the notch 28. This position would be maintained by the action of gravity, but in the preferred embodiment I do not depend upon gravity for this purpose but employspring means susceptible of accurate adjustment to vary the force required to swing the blade in the operation of gripping a thread or yarn. Said spring means comprises in the present instance a coiled expansion spring 35 encircling the shank of a screw 36 projecting downwardly and rearwardly in the notch 28 substantially perpendicular to the bottom thereof. The spring bears between the head of the screw and awasher 31 engaging with the under side of the blade, which latter is provided with an enlarged opening 38 to permit passage of the screw without interfering with the limited rocking motion of the blade relative to the shaft.

It will be seen that the slot formed between the lower forward edge of the blade l3 and the rear face of the plate l2 may be varied in width according to the normal thickness of the yarn being wound, merely by changing the angular position of the rock shaft 21 by means of the adjusting screw 30. As shown, the edge of the blade is in the present instance serrated, and in the normal operation the blade serves to clear the yarn of fibers and other-extraneous substances. In Fig. 3,

broken lines

8 and 8* indicate the range of lateral. motion imparted to the yarn in the winding operation. With such motion imparted to the yarn, the serrated edge of the blade in clear-.

is sumciently sensitive to respond to the abnormal force exerted on the blade by the gout in the pull of the thread, and to lift the blade, forcing its free edge against the plate I2 whereby to. clamp and break the yarn. By meansof the screw I8. the tension of the spring 3| opposing the gripping action of the blade may be readily varied as may be desired depending upon the kind and size of the yarn which is being wound. 1

To release a strand of yarn gripped by the blade II in cooperationwith the plate ii, the

shaft 21 may be rocked counterclockwise by'depressing the crank arm 28; When the device is used in connection with an automatic winder of the type shown in Patent No. 1,267,977, the traveling mechanism of the winder is provided with a cam bar arranged to depress the crank am. To

limit rotational movement of the shaft 11 the,

latter has. a stop pin 38 engageable with the bracket 3|.

I claim as my invention:

1. A yarnclearer having, in combination, means I providing a yarn guiding surface, a rock shaft spaced from said surface and disposed substan tially perpendicular to the direction of travel of the yarn, a blade having a pivotal support 'co-' axial with the shaft and inclined in the direction of approach of the yarn, said shaft-having an abutment limiting pivotal movement of the blade in a direction away from said surface, and spring means yieldably holding said blade against said abutment.

2. A yarn clearing device comprising, in combination, means providing a yarn guiding sur: face, a shaft mounted in spaced relation to said surface and disposed substantially horizontally to the direction of travel of the yarn, said shaft having a notch in one side thereof, pivot points mounted in said shaft in the ends of said notch. a blade mounted on said pivot points and inclined in the direction of approach of the yarn with one end of the blade spaced a predetermined distance from said surface, and means including a spring acting upon the opposite end of said blade to hold it against the bottom of said notch.

3. A yarn clearing device comprising, in combination, means providing a yarn guiding surface, a supporting member mounted in spaced relation to said surface, said member having a notch in one side thereof, pivot points mounted in said member in the ends of said notch, a blade mounted on said pivot points and inclined in the direction of approach of the yarn with one end of the blade spaced a predetermined distance from said surface, the opposite endof said blade having an opening therein, a screw anchored in the ,member and passing loosely through said opening, and a springencircling said screw and yieldably holding the blade against swinging movement relative to the member. I

4. A yarn clearing devicecomprising, in combination,- means providing a fixed upright guiding surfaceover which the yarn is adapted to pass in an upward direction, a supporting member, a blade mounted on said member to turn on a horizontal axis and inclined downwardly from said axis with its lower edge normally spaced from said surface a distance corresponding to the northe blade and said supporting member for yieldably resisting movement in the opposite direction.

5. A yarn clearing device comprising, in combination, means providing a yarn guiding surface, a rotatively adjustable supporting member mounted in spaced parallel relation to said surface and providing an abutment, a blade swingably mounted on said member and disposed in inclined relation to said surface with one edge portion adapted to cooperate with said surface, said blade having a part engageable with said abutment, and spring means carried solely by said supporting member acting to hold said part yieldably against said abutment.

6. A yarn clearing device comprising in combination, means providing a yarn guiding surface, a supporting member providing an abutment, a blade pivotally mounted on said supporting member and inclined in the direction of approach of the yarn with one edge portion adapted to cooperate with said surface, said blade having a part engageable with said abutment, spring means on said supporting member acting to hold said part yieldably against said abutment, said supporting member being mounted for rotational movement, a stationary stop, and means including a spring for holding said member against said stop.

7. A yarn clearing device comprising, in combination, a stationary member having a yarn guiding surface, a blade inclined relative to said surface and having one edge adapted to cooperate with said surface, means pivotally supporting the blade comprising a rock shaft, an abutment on the rock shaft for limiting pivotal movement of the blade, adjustable spring means carried solely by the rock shaft for holding the blade against said abutment, and means for turning the rock shaft to vary the position of the edge of the blade relative to said yarn guiding surface.

' BURT A. PETERSON.