US2578018A

US2578018A - Warp beam collar

Info

Publication number: US2578018A
Application number: US83137A
Authority: US
Inventors: Rovas Tobias
Original assignee: OHIO KNITTING MILLS Inc
Current assignee: OHIO KNITTING MILLS Inc
Priority date: 1948-05-01
Filing date: 1949-03-24
Publication date: 1951-12-11
Anticipated expiration: 1968-12-11

Description

Dec. 11, 1951 T. ROVAS 2,578,018

WARP BEAM COLLAR Original Filed May 1, 1948 2 SHEETS-SHEET 1 INVENTOR.

Tole/As Roz/As Dec. 11, 1951 v s WARP BEAM COLLAR 2 SHEETSSHEET 2 Origiral Filed May 1. 1948 IN VEN TOR.

Roi/A5 Patented Dec. 11, 1951 S P TENT FFICE Divided and this a iiqe ii atch alga Q Na 31 2 Claims. (01. 242-124) This invention relates to knitting machines and'particularly to apparatus for winding yarn or' threads onto a warp beam, and the present application is a division of my copending application Serial No. 24,643, filed May 1, 1948.

In knitting certain articles, such as sweaters, it is desirable to weave the, fabric in web form in such manner that one longitudinal half has the pattern reversed with respect to the other half, so, that when the 'finished web is folded longitudinally the patterns will be" superimposed upon each other. 'This will enable two identical panels to be cut simultaneously. Heretofore, the strands have been wound through a guidebar from the bobbin, but when one section has been wound, the guidebar has been rethreaded whenever a reversal of the pattern was desired. Such rethreading operation required considerable time and painstaking effort to assure. precise positioningof the threads with respect to each other, particularly where threads of difierent color have been used in making the pattern.

Another diificulty encountered in the winding of strands onto a beam, or in warping a beam as it is called in the trade, has been to make the strands of equal length on the respective sections of the beam. Such difiiculty has been au mented by the use of sheets of paper which have been interposed inthe material for the pur: pose of supporting the ends of the adjacent sections. Such sheets have been interposed at intervals of about one inch in depth of yarn on the beam and have overhungthe ends of the sections. The introduction of the paper, how: ever, has madeit 'difiicult to determine accurately the precise length of threads "or strands that are wound onto the. beam.

To overcome the foregoing objections, the practice has been to wind strands in a predeter mined pattern upon a pilot beam, which is usually about three feet in diameter, and'then to rewind from the pilot beamonto'the individual warp beams. Each warp beam, when wound, is

approximately fifteen inches in diameter, and

inasmuch as there are usually five or six beams used on a knitting machine, it is apparent that beams having a size of the pilot'beam could not be used within the space' limitations of a knitting machine. r

An additional objection to the. use of a pilot beam is that 'the rewinding operation from the pilot to, the warp beam requires as much as fifty sheets of paper "to be interposed between layers, i -i -iwl r r hslr that" iqlir some re wound onto the beam, and such practice has necessitated not only the expenditure of consider'able time during winding, but has introduced a problem ofremoving the paper from the beams and disposing of 'it during the unwinding operation.

An object of the present invention is to provide'an apparatus by means ofwhich the rolls of strands on the warp beam may be securely held in the desired relationship with the end portions of adjacent sections disposed in close proximity to each other. The invention is illustrated in the form of supporting devices or collars which may be readily detached from the roll or may be applied thereto in an expeditious manner at any desired place upon the beam. Claims to the method and apparatus by means of which the winding operation onto the beam by a reversal of the position or the threads forms part of my 'co'pend-ing patent application, Serial No.- 24,43, aforesaid.

Referring to the drawings, Fig. l is a side elevation of the device embodying my invention and illustrating the winding of a beam; Fig. 2 is a perspective view illustrating. the winding of a section on a beam on which two sections have previously been wound; Fig. 3 ma side view of a spacing'device'that is used in connection with theoperation of the present invention; Fig. 4 is a section taken on a plane indicated by the line 4-4 in Figl'3; Fig. 5 is an exploded side elevation illustrating the separability of the parts of the collar illustrated'in Fig. 3; Fig. 6 is a'perspective View illustrating the manner in which the collar may be assembled-"onto the beam; Fig. 7 is a longitudinal section on a scale any te e the; attes-1 righ't membersdfi of a frameli'and'is adapted to'be rbtated by an electric momma through a belt connection 19. The bobbins are shown as having their respective axes disposed in a I vertical plane butsuc'h showingis only diagrammatic, it being understopd that the bobbins may be mounted, if desired, with their axes in a horilane w by' ie h ead 'an be" w t from the bobbin in a mdvemnt gener- The gathering device with which the subject matter of the present invention is illustrated includes a vertically extending apertured bar 20 through which the strands pass, and a horizontally disposed apertured bar 2| through which the strands also pass their travel from the bobbins to the beam. The device also includes a roll 22 around which the strands pass in their 7 travel from the bar 2| to the beam, as is shown particularly in Fig. 2. The bars 20 and 2| and the roll 22 are supported upon a carriage, indicated in general at 23 which is'slidably mounted in guideways on

beams

24, 25 which extend longitudinally of the frame. The purpose of the carriage is to permit the strands to be wound onto the beam in one section, and then shifted as a unit to permit the winding of the threads, ither in the same or in reverse pattern, on another section of the beam.

The vertically disposed bar 2!! is shown as i being supported at its lower end in a curved guideway 21 on the carriage bed, and as being adapted to be clamped in any desired position --.thereon. Thus, the bar 20 may be positioned either close to or remote from the beam, or at 7 an angle to the bar 2| in accordance with the expediency of the particular section that is being wound on the beam.

The roll 22 is journalled in the carriage and V has an abrasive surface so as to avoid slippage between it and the strands. Thus, by connecting a counter 40 to the shaft, the number of revolutions of the shaft and, therefore, the length of the yarn wound onto the beam, can be accurately determined. In this way, the length of yarn on the respective sections wound onto the beam can be readily controlled.

A feature of the present invention is the provision of relatively thin detachable collars which are adapted to be positioned between sections upon the roll, and which function to support the adjacent end portions of the sections as the yarn is wound onto the beam. The outermost ends are adapted to be supported by flanges 41 which are held in place by set screws 48. Preferably, each col1ar embodies a thimble 45 which has an opening 46 to receive the beam. Each thimble has an annular groove 49 therein for receiving a pair of'semi-circular sections 50 and Each section has a semi-circular notch 52 for receiving the thimble, and each embodies a relatively thin plate so as to occupy as small a space as possible between the sections of yarn wound onto the beam.

,fI'he collar members are adapted to be locked together so as to form a partition between ad- Jacent sections. A preferred form of locking device includes a pin 53 which is carried on one -member and is adapted to coact with a latch 54 on the adjacent member. Each latch is pivpted, as at 55, and is shaped at its free end to H engage a notch 56 in the coacting member. The pin is slidably mounted within a cylinder 51 and is urged outwardly to a position overhanging the notch by a spring 58. The end 59 or the pin is then adapted to engage the latch so as to clamp the coacting members together. The opposite end of the pin projects through the other end f of the cylinder and terminates in a head 60 by means of which the pin can be withdrawn manually to permit unlatching of the collar.

Fig. 6 shows one collar, indicated at 6|, as being soon as the two sections of the collarar'e brought together around the thimble, the latches are moved inwardly about their respective pivots until the ends thereof enter the coacting notches in the companion section. During such movement, the adjacent pins are withdrawn manually to admit the latch endslnto their respective notches, and then the pins are released, at

,which time they project over the latches, as

" shown particularly in Fig. 3.

In operation, the strands are led from the respective bobbins and threaded through the apertures in the vertical bar 20, thence through the apertures in the horizontal bar 2|, thence past beneath the roll 22 and onto the beam. In Fig. 2, the sections designated 63 and 64 have been wound withfthe, pattern in the same sequence, that is, the

lines

65 and 66 in each section desigis reversed to that of the sections and 64.

At the completion of the winding operation, the beam is removed from the machine and is placed upon the knitting machine where, in conjunction with other beams, the threads are brought out and passed through the needles and the knitting operation is started.

Before the knitting operationis started, I may, if desired, move the collar sections from the beam,

except the end flanges 41, at which time the wound sections support each other, due to the relative thinness of the material which formed I the collar sections. In practice, such plates are approximately one-eighth of an inch in thickness and are, therefore, sufficiently thin to preclude the possibility of the end turns of yarn becoming tangled or fouled on the beam.

I have found that, in operation, the necessity for interposed sheets of paper has been eliminated, and that, because of such elimination, sections can be wound tighter; As a final result, the

beams may'bewound to contain substantially twice as much yarn as heretofore.

In this way, each knitting machine may be operated for substantially twice the length of time for any given threading of the machine. This is an important factor in the economy of operation, because of the time required to thread the needles and to set the beams upon the machine.

I claim:

1. A device for spacing sections of strands on a warp beam comprising, a pair of separable semicircular plate sections. each having a centrally disposed notch therein, the notches coacting to provide an aperture through which the beam may be passed, each section having a notch adjacent its, periphery and having a springpressed pin within the plane of the section adapted to overhand thenotch, and the other section having a Y latch fitted thereto within the plane of said section and shaped at its end to engage the notch in the other section, said pin being adapted to overlie the latch when said latch occupies said notch, whereby the sections may be clamped together.

2. A spacing device for use on a warp beam embodying a pair of separable semi-circular plates, each having a semi-circular notch adjacent the center thereof,said notches cooperating to pro- 'vide an aperture through which the beam may be passed, each semi-circular plate having a notch on its periphery adjacent diametrically opposite engaging portions of said plates, a spring pressed pin circumferentially spaced from the notch within the plane of each respective plate, each pin adapted to overhang the correspondin notch when released, each plate also having a latch pivoted thereto within the plane of the plate diametrically opposite from the pin and notch on said plate, each of said latches being shaped at the free end to engage the notch in the other semi-circular plate, each of said spring pressed pins being adapted to overlie the corresponding latch when said latch occupies the cooperating notch, whereby the semi-circular plates may be 15 6 securely clamped together to present a uniform spacing plane for the warp beam.

TOBIAS ROVAS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 619,803 Succie Feb. 21, 1899 FOREIGN PATENTS Number Country Date 26,313 Great Britain of 1902