US1000109A - Machine for covering or insulating wire with yarn or its equivalent. - Google Patents

Description

D. NOBLE. MACHINE FOB COVERING OR INSULATING WIRE WITH YARN 0R ITSJBQUIVALBNT.

APPLICATION I'ILEDiAUG. 18, 1910.

1,000,109. v Pa en e A g. 8, 191 1,

2 SHEETS-SHEET 1.

WITNESSES:

- mmuwmi,

ATTORNEY required UNITED s'rATEs PATENT ormon.

.UVMMLD NOBLE, OF BRIIDGrEPOIEt/I", CONNECTICUT.

MACHINE FOR COVERING OR INSULATING WIRE WITH YARN OR IT S EQUIVALENT.

To all whom it may concern:

, die it known that I, DONALD NOBLE, a subject of the King of England, residing in the city of Bridgeport, county of Fairfield,

and State of Connecticut, United States of 'An'ierica, have invented certain new and useupon the construction and operation of the machine shown and described in my pending application for Letters Patent, Serial No. 511.37%, filed August 5, 1909.

Inmy pending application referred to, I showed and described an arrangement of planetary rollscarried by the spinning head, in parallelism with the axis of revolution thereof, for the purpose of engaging the.

yarn and paying out the same to the wire coverin devices at a tension less than that to draw the yarn from the cop itself, and while this construction was entirely satisfactory under ordinary circumstances I discovered that when the spinningv head was run at a maximum' speed much greater than hasheretofore been possible in machines of this description, the centrifugal force developed was so great that the planetary rolls would be driven against their bearings with such force that great power was required to revolve them, and the au'iount of power so required retarded the speed of the machine to a considerable extent. I

.rccordingly, in my present improvement, I have aimed to overcome this difficulty by disposing the yarn delivery rolls'in suchama'nner that the centrifugal force caused bv the rapid revolution of the-spinning head will be so counteracted that it is reduced to a minuimum, and with these ends in view my invention consists in certain arrangements of pa,rts hereinafter fully described Specification of Letters Patent.

Patented Aug. 8, 1911.

Application filed August 18, 1910. SerialNo. 577,879.

and then particularly pointed out in the claims which conclude this description.

In the accompanying drawing Figure l is a plan view of the spinning head equipped with my improvementFig. 2 a front View of the sameFig. 3 a longitudinal sectional elevation taken at the line a, a), of Fig. '4, and Fig. 4: a section at the line y, y, of Fig.3.

Similar numerals of reference denote like parts in the several figures of the drawing. Like the improvement set forth in my pending application aforesaid, my present invention relates solely to the delivery of the covering yarn at a proper tenslon to the wlre covering devices and I have not lllustrated nor will I describe any of the parts of a winding machine of this description except those that are immediately associated with the spinning head which winds the yarn around the wire.

1 is the power shaft of the machine and 2 is the spinning head which has an internal hollow hub 3 that is tightly secured to said shaft whereby the latter will impart rotary movement tosaid head. 7

In Letters Patent No. 919,751, issued to me April 27, 1909, I showed and described certain means for exerting an automatically diminishing tension against the yarn and cop, which means comprised a spring controlled tension finger carried by the spinning head and bearing against. the outer face of the cop, the opposite peripheral edge of the cop having a constant'bearii'ig against an incline within the back of the spinning head, so that as the diameter of the cop decreased, the rear peripheral edge of the same would bearagainst said incline at points nearer the axis of revolution of the spinning head while the spring controlled tension finger would constantly bear against the'front of the cop but with a diminishing pressure owing to the continual weakening of the spring. My present improvement employs this automatically diminishing tension, the rear wall of the spinning head being inclined from the outer periphery to the center as shown at 4, while the yarn cop 5 wound on its cop tube 6 is placed around a metal bushing 7 which has ribs 8 that fit the interior incloses the cop and also extends rearward of the tube 6 fairly tight, and this bushing is placed around the hub 3 and is loose thereon so as to be capable of an independent rev olut-ion, while the tension finger 9 bears against this bushing-instead of against the cop itself as in my pending construction. But the provlsion of this bushing 7 has nothing to do with my present invention, and I employ the bushing merely because it affords v ters Patent.

10 is the rim of the spinning head which of said head, and within said. rim and secured to the rear of the head is a casing 11 through which the power shaft'freely extends. I

12 is a. worm supported loosely by the shaft 1 and extending within the casing 11 and provided with a sleeve extension 13 which forms the journal bearing for the shaft and which is secured to the bed 14 of the machine by means of set screws 15, so that it will be clear that said worm is a stationary element. The casing 11 hashousings 16 which are disposed radially with respect to the power shaft and are provided with laterally extending bearing sleeves 17, and 18 are spindles journaled within said housings and sleeves and therefore each extend in a plane at right angles to the radius of said shaft. 19 are worm wheels secured to the inner'extrcmities of said spindles and meshin with the worm 12, so that it will be readily understood that when the spilr ning head is revolved said worm wheels will travel around the stationary 'worm and thereby revolve thes oindles 18. These spindles 18 extend slightly beyond the outer extremities of the s eeves 17 and to these pro jecting ends are secured. the yarn delivery rolls 20 which extend through the rim 10 in planesthat are inclined from a tangent to said rim. Adjacent to these rolls 20 and projecting from the outer periphery of the rim 10 are yarn guides 21 which, in con nection with the inclination of the rolls beyond said Tim, eausesthe coils of the yarn around the rolls to be kept.- apart so that they cannot overlie each other and become bunched and thereby prevent the proper slipping between the yarn and rolls, andwhile these yarn guides are desirable I would say that they are not absolutely necessary and I do not wish to be limited thereto.

Referring particularly to Figs. 1 and 2, the yarn is led from the cop through any suitable opening 22 in the rim, passed around a guide stud 23 projecting from the rim, then wound once-or twice around .one of the rolls and passed up over a yarn guideQl, thence-passed once, for instance, around the next roll and led .up' over the next yarn guide and thence passed overthe third guide and around the third rolland finally led to the spinning nozzle 24 in the usual manner. The passing of the yarn around the rolls of course causes more or less friction between said yarn and rolls when the latter are revolving axially, and the number of coils of the yarn disposed around the rolls depends of course upon circumstances such as, for instance, the size and strength of the yarn and the size of wire to be covered. In some instances, it too many coils of yarn were disposed around one or more of theserolls the result would be that the yarn would exert such a grip upon the rolls that when the latter revolved altogether-too much yarn would be paid out to the wire covering devices which would create a slack and would quickly cause the yarn to become snarled. On the other hand, if too few a. number of coils were dis osedaround these rolls there would not be riction enough between the latter and the yarn, and tlns would result in the paying out of no yarn to the covering de vices by the action of the rolls, and the tension at which the yarn would be delivered.

rious sizes of wire is readily ascertained by experiment, the conditions in these respects being precisely the same as those attaching to the yarn delivery rolls set forth in my pending application aforesaid.

The revolution of the rolls is very slow as compared with that of the spinning head, and the character of the worm and worm wheels is such that'twcnty-four revolutions of the spinning head will eii'ect one revolution of the rolls. As the spinning head revolves there is a tendency to cause the inner ends of the spindles 18 to'hug their inner bearings, due to the fact that the worm. 12 is stationary while the worm wheels travel around the same, but the centrifugal force tends to throw the spindles outwardly which force is partially counteracted by the fact that these spindles are not radially disposed with respect to the axis of rotation of the power shaft. By careful experiment I have ascertained that this centrifugal force is practically counteracted by the nianner in. which the spindles are disposed together with the tendency t the inner ends of the spindles to hug their 1111161 coils so that the latter cannot possibly become merged.

The function and operation of the rolls is the same as in the instance of my pending application above referred to, since the rolls are revolved independently and very slowly and the grip oflthe yarn around the rolls gives a slipping tension, so that'there is always a tendency to pay out to the wire covering instrumentalities too great an amount of yarn which tendency is counteracted by the slipping between the rolls and yarn, this slippingv being due to the back drag on the yarn caused by the comparatively greater tension at which the yarn is drawn from the cop itself, and, therefore, the yarn is paid out to the wire covering instrumentalities at a certain predetermined and greatly diminished tension. The greater the extent of revolution of these rolls the greater is the excess of yarn which these rolls tend to pay out, and therefore the greater is the slipping between the yarn and the rolls in order to take up this excess, and thus it will be clear that the number of rolls and extent of revolution thereof are immaterial although it isof course desirable to employ such number'of rolls properly revolved as will give the best results.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. In a machine for covering or insulating wire with yarn or its equivalent, the combination of the spinning head. which carries the yarn cop with a suitable tension acting thereagainst, means for revolving said head, rolls carried by said head and each projecting at an inclination from a tangent to said periphery through the periphery of said head around which rolls the yarn is wound as itpasses from the cop and from which rolls the yarn is delivered directly to the wire covering devices, said rolls rotating independently and operating always with a tension to pay out to said instrumentalities an amount of yarn in excess of that needed.

2. In a machine for covering or insulating wire with yarn or its equivalent, the combination of the spinning head which carries the yarn cop, a suitable tenslon thereagainst and means. for revolving said head, of rolls carried by said head and extending in planes that are at a distance from the axis of revolution of said head and are at rightangles to direct radii of said head around which rolls the yarn is wound as it passes from the cop and from which the yarn is delivered directly to the wire to be covered, said. rolls rotating independently and operating always with a tendency to pay 'out to the wire an amount of yarn in excess of that needed, which excess is constantly taken up by the slipping between said rolls and yarn due to the comparatively strong tension at which the yarn is drawn by the rolls from the cop.

3. In a machine for covering or insulating wire with yarn or its equivalent, the combination of the spinning head which carries the yarn cop with a suitable tension thereagainst and the spinning nozzle carried by said head and to which the yarn is led from the cop, means for revolving said head and nozzle, rolls extending lengthwise through the periphery of said head and at an inclination from a tangent to said periphery, means carried by said head and cooperating with a stationary element for revolving said rolls independently and at a speed considerably lessv than that of said head, around which rolls the yarn is wound as it passes from the cop and from which rolls the yarn is delivered directly to the spinning nozzle whereby said rolls will operate to draw the yarn from the cop at a comparatively strong tension and to pay out said yarn to the spinning nozzle at a constant and greatly diminished tension which is maintained and predetermined by the bight of the yarn against the rolls and by the slipping between the yarn and rolls due to the back draft exerted by the comparatively strong tension on the yarn as it is drawn from the cop.

4:. In a machine for covering or insulating wire with yarn or its equivalent, the combination of the power shaft, the spinning head carried thereby, the yarn cop contained within said head with a. suitable tension thereagainst and the spinning nozzle at the extremity of said shaft, with the stationary worm loose around said shaft, rolls projecting lengthwise through the periphery of said head in planesat right angles-to direct radii of said head, and means connected to said rolls and cooperating with said worm forrevolving said rolls independently and at a speed greatly less than that of said head, the

yarn being led from the cop and passed "around the rolls and thence to said'noz'zle.

5. In a machine for coveringor insulating wire withvyarn' or its equivalent, the combination of the power shaft, the spinning head carried thereby, the yarn cop contained within said head with a suitable tension thereagainst and the spinning nozzle at the extremity of said shaft, with the stationary i worm loose around said shaft, rotary spinsaid head, the yarn being-led from the 60p 10 dlescarnied by said head at a distance fromand passed around the rolls and thence to said shaft in planes which extend ,athwart said nozzle.

angles to direct radii of said head, Worm in presenceiof twowitnesses.

the plane of said shaft and are at right In testimony WhereofI aflix my signature Wheels secured to the inner ends of said DONALD NOBLE spindles and engaging said Worm, and rolls Witnesses: 1 v

carried by the outer ends of said spindles F. W. SMITH {T125 :and projecting through the periphery of M. T. LONGDEN.

Images