US2052711A - Yarn inspecting device - Google Patents

Description

P 1936- E. 0. JENNINGS 2,052,711

YARN INSPECTING DEVICE Filed April 16, 1935 ATTORNEY Patented Sept. 1, 1936 -J YARN INsPEoTmGpEvIoE swarm. Jennings, 'lfhiladelphia, 1a.

inspeeting'device and it relates more particul'arly to a device whereby a plurality of yarns may be inspected simultaneously with a greatsaving' of time'andeffo-rt. A 5 fi In the manufacture of yarns "it is necessary that each lot produced should-be inspected and graded or calibrated,'so that when theyarn is sold forthe' manufacture 'of finished goods,-' the character of the goods produced (except for defects' occurring I during 1 the weaving or knitting thereof) can be predetermined.-Thus ifthe ya'rn usedis not inspected beforehand; it'is necessary to inspect and sort'theifinished goods into' fi-rsts and seconds '01: some: similar -gradation.-' If however, the yarn is "inspected and r graded V beforehand; the finished' goods produced canbe graded as-ffirsts ior seconds according to the grade of the yarnsiused in the manufacture thereof; "lh-rthe-inspection -of yafnsJit has been'found' that if 'a fewyards 'fror'n'atgiven cone are inspected it is safe to assume-that the rest of the cone would probably average the same number of;defectst per yardyif any, as appeared in the few yards inspected,'and-'byinspecting'a few yards from a few cones belonging to one lot of manufacturedyarna it is possible to estimate within practical limits the general condition of the whole lot of yarn, without the necessity of inspecting each and every cone of the yarn produced. For example, if a lot of yarn is produced and wound on one hundred cones and a few yards are inspected, of say, each of twenty cones picked at random, it is safe to assume that the yarn on all the one hundred cones is approximately the same calibre as the specimens inspected. In this way the manufacturer can represent all the one hundred cones as being of a particular grade depending on the number of defects per yard occurring in the yarn specimens from a number of cones, picked at random from the lot of yarn in question.

It is therefore the object of my invention to produce a novel inspecting device which is inexpensive to make and easy to operate, and on which yarn specimens from a number of cones can be inspected simultaneously and in very short order.

To the above ends my invention consists of a large driun of a known circumference on which the yarn spec mens may be wound, means for rotating said drum, a feed screw shaft rotating synchronously with said drum for feeding the yarn specimens onto the drum and means for permitting the simultaneous winding on said, drum of w "ApplicationApril is; 1935; Serial No. 16,606

I i(o1.- zs 26) My invention relates to a new and'useful yarn yarn specimens from a number of different cones.

My inventionfurther consists of various other details of construction and advantage all as hereinafter setforth in connection with the accompanying drawing, in which: 5

Fig. l represents'an end elevation of a yarn inspecting device embodying my invention.

- Fig. 2 represents; on an enlarged scale, a front elevation of Fig. 1.

Fig; B'represents a plan view of Fig. 2.

' Fig.4 represents, on a slightly enlarged scale,

a section on-line 4 4 of-Fig. 2.

' nut feeding device'seenat-the upperhalf of Fig. 4,

shown detached; i 3 H "Referring to the drawing in which likere'fcreme-characters indicate like parts; 1 indicatesany' 'suitable frame or housing in'the upper portion of *which is suitably rotatably 'mounted the drum 2.- The drum is driven by the belt 3 which travels over the pulley 4 on the shaft 5, driven by the motor 6 and over the pulley 8 carried by or otherwise associated with "the drum 2. The shaft supporting the drum 2- is also provided with the pulley' I 0, over wh ch travels the belt I I which 5 also engages the pulley I2 to rotate the feed screw Hi whichis'journalled in .the bearings l5 and which rotates in the semi-cylindrical casing 16, which may contain a lubricant, if desired. In order to vary the speed, if so desired, the extra pulleys H and I8 are also provided. 20 represents a feed half-nut, the threaded part 2| of which is adapted for engagement with the upper threaded half of the feed screw I4, While the legs 22 of which are adapted to ride on the upper edges 23 of the semi-cylindrical trough or casing 16. The feed half-nut is provided on a face thereof with the posts or screws 25, 26 and 21 over, around and under which the yarn to be inspected may be threaded to accomplish the desired tension.

The operation is as follows:If it is desired to inspect the yarn 38 from the cone 3| and the yarn 32 from the cone 33, it is merely necessary to position the cones on the floor or on a platform in front of the machine, and to thread the yarns 30 and 32 thereof through the eyelets 34 and 35, the yarns being then passed over, around or under any or all of the posts or screws 25, 26 and 21 in the manner shown in Fig. 1 or in any other desired manner, depending on the amount of tension desired, which in turn depends on the speed of rotation of the drum, as well as on the character of the yarn. The free ends of the yarns 30 and 32 are tied or otherwise anchored to the posts 38 and 39, whereupon the switch controlling the motor 6 is turned on and the drum is rotated at a set speed. This results in winding over the drum any desired length of yarn from the cones 3| and 33 as shown in Fig. 2. The motor 6 is then turned ofi and by depression of the brake lever 40, which is tensioned by the spring 42, the brake shoe 45 acts to stop the rotation of the drum 2. The yarn thus wound 10 around the drum is then inspectedfordefects and the"defe'cts' are averaged with respect to. the number of yards of the yarn wound on the drum, which is determined by the number of times the yarn is wound around the drum, multiplied by the known circumference of the drum. Thusjlif the circumference of the drum is.r6 ft. and if an average of 2 defects are foundfor'ea'ch' turner the yarn around the drum, it-will be seenithatp longitudinalslots 48: se that a knife may be passed'overthe yarn and through; the'slot, thus cutting the continuous turns of yarninto small 0 sections which can be easily: removed: trom the drum. I-he feed half nut riding. on theupper edges 23 of. the; semi cylindrical-casing? I6 I and-- engaging the feed: screw It; travels-{in the direction fof the lead of the thread -of the' feed f'screw, which is driven synchronously with the drum,"thus uniformlyfeeding the yarn onto. the drum; Whilein'the' drawing I have illustrated; the inspection of I yarn from: only two -cones,-. it is;-

to be understood" that in practice the number of 40 cones,- t'he yarns of which may-- be inspected si-- multaneously, is limited only bythe lengthof the drum "land the feed screw l4; since with adrum of 6ft. in; circumference, itwouldonly be necessary to-havefrom 2 to4 or 5-turns-of1yarn around thedrum-to-obtaina representative speci men of-t-heyarn on any particular cone,'so,-thati the ya-mfrom quite a' number of cones can be tested simultaneously on a drum 4 ft. long. It is of course understood, that after the yarn from one set of cones has been tested, the feed halt nuts 20 are reset to the desired position with the first one at the extreme left hand end of the feed screw l4, and with the others spaced according to the length of yarn desired to be wound around the drum from the respective cones. When a smooth yarn having a low index of friction is being tested, it may be. necessary. to: thread the yamaroumiz or over each one of"the-posts 25,

26 and 21 in order to secure the proper tension,

and where a coarse yarn, having a high index offriction, is being tested, it may be found de- "of the posts 25,,26 and 21.

It will tlius' lie" seen that with my novel yarn inspectingi devicerli am able toinspect one or more specimens of yarn simultaneously and in V V aminimum of time, since the large circumference of= thezdrmn and: its: rapid: rotation and rapid stoppage; will resul-t=- in the: winding: on the A: yam inspectingrdevioe i'comprisingi a houseing 'a drumofi an relativeim 'large: circumference journal-em in==said11housing;;a pulley? for driving; said drum; a' reversible 'feecli screw, a pulley: for" driving; the same, at-belt passing over'bothqofi said puileyswjand adapted to: be actuated by'a source of: powem a threatiedr nut engaging: said: feed: screwandrmovable? longitudinally off said rirummainel:- a: yarn: tensioning=- deviceacarriedi by said half nut and: movable therewith, said:

drum: having; a longitndinah slot in thesurface thereof and-r-beingrof a celor contrastingawithxthe r Ema/name! V

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