US2343135A - Take-up for looms - Google Patents

Description

Feb. 29, 1944.

G. CROMPTON, JR

TAKE-UP FOR LOOMS Filed July 31, 1941 3 Sheets-Sheet 1 5 Sheets-Sheet 2 Feb. 29, 1944. e. CROMPTON, JR

TAKE-UP FOR LOOMS Filed July 51, 1941 Feb. 29, 1944. ROMPTON JR 2,343,135

TAKE-UP FOR LOOMS Filed July 31, 1941 3 Sheets-Sheet 5 I G I I 11 '9' v 2.343.135 I m -urroatooms if" George-Grompton, In, Worcesten-Mass; I "mute-ta my 3I,i 19 41, Serial 4o 4,'z5 i winc -zoo The invention relates to looms for weaving and knitting simultaneously and-involves an improvement in the loom of my. prior. Patent -l'No. 1,980,666.- I

One object of the knitted sections taut and prevent dropping of stitches. Another object of the invention is to speed the production of ribbon jersey on a loom of the type disclosed in my Patent No. 1,980,666. Another object of the invention is to improve the functioning of a zoom constructed according to the said patent. Another object of the invention is to provide a take-up for the knitted portions of ribbon jersey without interfering with the functioning of the loom in other respects. Another object of the invention is to provide two take-ups for looms of the class indicated, one for the knitted part of the fabric and the other for the woven part. Other objects will be in part obvious or in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements,

arrangements of parts and in the several steps and relation and order of each of said steps to one or more of the others thereof, all as will be illustratively described herein, and the scope of the application of which will be pointed out in the following claims. V

In the'accompanying drawings illustrating one of marry possible embodiments of the mechanical features of this invention Figure 1 is a side elevation of the front of a loom according to Patent No. 1,980,666 illustrating the drive for the two take-up motions;

Figure 2 is a frontelevation of the knitting take-up drive and a portion of the take-up rolls;

Figure 3 is a side elevation showing the details of the drive for the knitting take-up on a somewhat enlarged scale as compared with Figure 1;

Figure'4 is a front elevation of the knitting take-up rolls and controlling mechanism;

Figure 5 is a plan view of the same;

Figure 6 is a detail of the knitting take-up pawl, bell crank lever and ratchet.

As conducive to a clearer understanding of the present invention it may be noted that a loom constructed strictly in accordance with my Patent No. 1,980,666 operates properly, but the lack of a firm tension on the knitted sections is noticeable. Due to the fact that the woven sections of the fabric can be stretched only to a limited degree there is a slack in the knitted sections regardless of how the fabric take-up is adjusted that causes an irregular and loose stitch, occasionally resulting in holes in the knitting and generally invention is to keep" the to the needles, which results in correcting the condition -mentione'dand achieves the objects slowing downjproduction. nae found that it is possible to apply; a separate take-up to the knitted portions of the" goods which. however,

does not interfere with the cloth take-up and tensions only the knitted sections rightadjacent hereinbefore set forth.

Referring now to Figure 1, the right-hand loom side of aloom according to Patent No. 1,980,666is indicated at Ill. The knitting cam shaft of the loom is indicated at ll. On this cam f shaft H is a take-up cam 12. This cam happens to have four lobes because I have found that a practical ratio of weaving to knitting is four to one, that is to say, four picks are inserted in the goods to every course that is knitted. The knitting cam shaft H controls the knitting and one course is knitted for every revolution thereof, while it is customary, as is known, to actuate the cloth take-up once for every pick'of the loom.

The take-up cam contacts a roller [3 on one end of a bell crank lever l4 pivoted at l5 to the loom. side I0. A turnbuckle l6 has a stud I I which is connected to the bell crank lever H in a desired position of adjustment in a slot H3. The turnbuckle [6 has screwed thereinto a link rod 19 which is screwed into a turnbuckle 20 from which projects a stud 2i in a desired position of adjustment in a slot 22 of a pawl lever 23 pivoted on a stud shaft 24 projecting from a take-up bracket. 25 which is fastened at the top to the breast beam 26 and at the bottom to a cross shaft 2'! extending between projections 28 of the loom sides Ill. The breast beam 26 is fastened to the upper front part of the loom side Ill and the corresponding part of the opposite loom side (not shown).

A take-up pawl 30 is pivotally mounted on the upper end of the pawl lever 23 and engages a ratchet wheel 3i to which is fastened a pinion gear 32 meshing with a large gear 33 to which is fastened a pinion gear 34 on a stud 35 extending from the bracket 25. The pinion 34 meshes with a large gear 36 which is fastened to the shaft 31 of a sand take-up roll 38. A hold pawl 39 pivoted at 40 on an extension 4| of the bracket 25 engages the ratchet wheel 3i and prevents retrograde movement of the take-up mechanism trunnions 41 resting in supports 48 extending upwardi' from the breast beam 88. Thence the cloth goes downwardly around a roller 48 having trunnions 88 fitting in recesses 8| in the take-up brackets 28, thence around the sand take-up roll 88, thence over a' roller 82 having trunnions 88 fitting in holes in forward projections 84 of the take-up brackets "28, thence over a roller 88 having trunnions 81 fittingv in recesses in projections 88 of the brackets 28; thence to a cloth roll 88 where the cloth winds in the usual man- The cloth roll 88 is. driven in any usual way, not shown, to wind up the cloth as it is delivered regardlessv of the diameter. of roll and cloth until it is full. A spring 8| fastened to the loom side I8 andto the stud I1 keeps the roller ii in contact with the cam I2. The foregoing is a standard take-up for weaving looms and any variety thereof may be substituted so far as my invention is concerned;

To this or any other take-up I add a take-up which operates only on the knitted sections of the goods and which islocated between the described take-up and the fell 82 of the goods. That is to say my additional take-up operates between the sand 1'01188 .or its equivalent and the fell of the goods .and only upon the knitted portions which can be stretched, whereas the woven sections cannot be. stretchedto any considerable extent. "Referring now to Figure 4, I provide an upper roll 18 and a lower roll 1 I. These rolls are desirably made of wood'and have trunnions 12 and 18 at their opposite ends. I cut soft tubular rubber into sections 18 and force them onto the trunnions 12 and 18 so that they are spacedadjacent each other on the rolls I8 and H which are parallel in the loom. These sections 18 are of a length and-so spaced that they will contact the knitted sections of the fabric but allow the woven sections thereof to pass through spaces 18 between the sections 18. I have found that in order to grip all the knitted sections with an even tension it is desirable to mount the rolls 18 and H on a grinder and to grind the sections 18 to uniform diameters and smooth surfaces.

Referring now to Figure 2, upstanding from the loom side I8 isan angle bracket 88; Referring to Figure 4, upstanding from the left-hand loom side (not shown) is a similar asymmetric angle bracket 8| only a fragment of which is shown. These brackets 88 and BI have rectangular para1lelopipeda1 end portions 82 and 88.

Referring to' Figures 2 and 4, supporting brackets 84 and 85 encompass the end portions 82 and 88 and are adjustably clamped thereto. Cup bearings 88 and 81 are bolted to the brackets 84 and 88 respectively. The trunnions 18 rest in thesecup bearings 88 and '81 and thus the roll 1| is rotatably supported below the goods 48.

Since guides.88 and 88 encompass the brackets 84 and 88 respectively. They have Journals 88 and 8| respectively for the trunnions 12'. To the trunnions 12 are fastened ratchet wheels 88 and 84 at the right and left respectively. Referring now to Figures 4- and 6, a bell crank lever 88 is pivotally mounted on the right-hand trunnion 12. A pawl 88 is pivotally mounted on the bell crank lever-88 and engages the ratchet wheel 83. The other end-of the bell crank lever 88 is a, fork 81 in which, as best shown in Figure 5, fits the end ofan arm I88. The arm I88 is fastened to the end of a shaft I8I extending through and journalled in the bracket 88. To the other end of the shaft III is fastened anarm I88. Referring to Figures 1, 8, 8 and 8, the arm I88 has a slot I88 at'itsoutcr end in which flts a pin I84 extending through a forked piece I88 attached to the upper end of and I88. The rod I88 is slidable vertically in a bracket I81 attached to the loom side I8. At the bottom of the rod I88 is an abutment end piece I88. A spring I88 (Figure 2) tends to new. the rod I88 down, being connected to the arm I82 and the bracket I81. The abutment piece I88 is adiustable on the rod I81, being screw threaded thereon and a nut I88 being provided for locking the parts in adjusted position.

Referring now to Figures 1 and 8, to the camshaft I I outside the loom side I8 is fastened a cam. II8. This cam II8 engages a roller III on a pin III in a fork II8 fastened to the lower end of a rod II4 mounted for vertical movement in a bracket I I8 attached to the loom side I8. A spring .Referring now to the left-hand side of Figure 4, extending from the side guide 88 is a bracket I28 pivotally mounting a hold rpawl Ill engaging the ratchet wheel 84.

The rubber sections 18 of the rolls 18 and H grip the knitted portion of the fabric. The cam H8 is so. shaped that it raises the roll III gradually at a particular angular position in its revolution, and thereby raises the red I I4 which contacts the abutment I88 on the rod I88, thus raising the pin I84 which moves the arm I82 upwardly, rocking the shaft IM and depressing the arm I88 the end of which extends into the fork 81 on the end of the bell crank lever 88, thus rocking the bell crank lever 88 and moving the pawl 88 which engages and moves the ratchet wheel 88. Since the ratchet wheel 88 is fastened to a trunnion 12 of the upper roll 18, the upper roll 18 is angularly moved (and in a direction to tension the knitted sections of the fabric). The mechanism is preferably timed so that this take-up impulse is imparted just as the needles (not shown) of the knitting mechanism go rearwardly through the knockover bits (not shown). Reference may be made to my prior patent for disclosure of the knitting needles (which are standard spring beard needles) and of the knockover bits (which are substantially conventional in shape).

It is at that precise point in the knitting cycle that tension is most needed upon the knitted portion of the fabric. rearwardly between the knockover hits, the old course is being cleared. If it is not cleared, in.

any particular wale, a defect is apt to occur. By taking up the knitted portions of the fabric at this moment in the knitting cycle, complete knocking over is assured.

The hold pawl I2I acting on the ratchet wheel 84 holds the upper roll 18' from retrograde movement. The amountof the take-up can be adjusted by selecting different ratchet wheels 88 and 84 and/or by varying the stroke of the pawl 88. It is wise to make the knitting take-upmove the knitted portions of-th fabric 48 at a slightly faster rate (say tenper cent) than the sand roll 88 takes up the entire goods, because-thereby the knitting take-up will always be ahead of the fabupon th roll 1i and its rubber sections 18, with When the needles move I of the slide guides 88 and It adds to the weight of the roll 10. 'I'he'lower roll II has a tendencyto sag in the middle, but so also does the upper roll and as a practical matter contact of each pair of tubular rubbersections is found to occur. Compensating weighting of the upper roll III by lead plugs inserted into the wood or by lead ringswrapped around the roll 10 between the sections 15- (still of not suihcient thickness to contact the woven portions) may be resorted to in particular cases where some intermediate knitted section is found to be slipping too much.

The special knitting take-up of this invention in no wise interferes with the regular take-up, as herein described, which determines the number of picks per inch inserted in the woven parts of the goods. Furthermore, it also does not change the number of courses per inch, which is a mathematical function of thepicks per inch represented by a small whole number exactly equal to the ratio of the R. P, M. of the back shaft (not shown) which controls the weaving, to the functioning of the loom. Although it is preferred to take-up suddenly as the needles move rearwardly between the knockover bits, some results can be achieved regardless of the moment when the pawl 88 moves and how fast, since a generally maintained tension on the knitted sections.

will improve the action of the looms.

It is noted that the special mechanism of this invention operates automatically and requires no attention in operation. Nevertheless the construction of the mechanism is such that the top roll II can very quickly be lifted and even removed altogeth'er from the machine in case work such as piecing on" is to be done, or whensetment above set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

'- I claim':

1. In aloom, take-up means capable of gripping the cloth with a firm grip, positive means to move said take-up means at a known average peripheral velocity, a pair of rolls one on either side of the'cloth between the said take-up means and the fell cushioningly gripping. the cloth with a resilient yielding contact, and means to drive one of said rolls at a known average peripheral velocity which is slightly in excess of the average ting up the loom. Furthermore, at the start of operations, an initial tension can be put upon the knitted sections simply by pulling the knitted sections forwardly between the rolls l0 and 'l l.

While in the preferred form of my invention both take-ups operate intermittently, they might operate continuously at a constant and predetermined rate. It is simpler, however, to provide ratchet and'pawl take-ups since much. gearing that would otherwise be needed is dispensed with, and changes in the rate of take-up can be more easily made. Any type of friction roll capable of gripping the cloth with a firm grip can be substituted for .the sand roll II. This take-up roll positively moves the cloth. The sections 15 could be made of any material, but a cushioning material is preferred. The rolls II and Ii are yieldingly urged together to press the knitted portions between the sections 16 and they yieldingly grip the cloth or fabric. a

peripheral velocity of the take-up means.

-2. In a-loom, a breast roll, a positively-driven, positively gripping take-up below th breast roll actuated at a predetermined rate and adapted to tension 9. length of fabric, and a positively driven but yieldingly engaging take-up also actuated at a predetermined rate to tension portions of the said 1ength of fabric'andlocated between the breast roll and the fell of the goods.

3. A take-up for looms, particularly for the production of ribbon-jersey comprising a pair of rolls, means mounting the rolls one above the other on either side of the fabric, one at least of the rolls having sections, that is, having contacting portions of f portions of less diame r, positive means to rotate one of said 'rolls at a predetermined rate, and additional constant speed take-up means acting on. the fabric beyond, i. e., farther from the fell than t e said rolls.

4. In a take-up as claimed in claim 3, the combination with the parts and features therein specified, of cam means, and a pawl and ratchet to drive one of the rolls.

5. In a take-up as claimed in claim 3, the combination with the parts and features therein specified, of contacting sections formed out of cushioning material.

6. A take-up for looms comprising a first roll having trunnions, Journals for the trunnions, slide guides for the journals, a ratchet wheel amxed to each trunnion, a second roll under the first roll and parallel to it, Journals for the second roll, a pawl and actuating mechanism to drive one of the ratchet wheels, a hold pawl for the other ratchet wheel, one at least of said rolls having sections of greater diameter than the intervening portions of said roll, whereby to grip fabric at given portions only and tension it at v such portions, and additional constant speed take-up means acting on the fabric beyond, i. e., farther from the fell than the said rolls.

7. A take-up for looms comprising a pair of rolls one of which has sections of a given diameter separated by portions of less diameter, means mounting one of said rolls in fixed position but permitting rotation, means mounting the other roll parallel to the first roll but free to approach and recede from it and also free to rotate, means to drive one of said rolls, and additional con-- stant speed take-up means acting on the fabric beyond, 1. e., farther from the fell than the said rolls.

- GEORGE CROMP'ION, Js.

diameter separated by- Granted February 29, 1944 GEORGE GROMPTON, J n.

The above patent was extended September 4, 1951, under the provisions of the act of June 30, 1950, for 2 years and 254 days from the expiration of the original term thereof.

Patent No. 2,343,135

Commissioner of Patents.

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