US2471469A - Wire lapping or like machine - Google Patents

Description

May 31 1949- w. J. L.. wlLDBoRE ET A1. 2,471,469

' WIRE LAPPING OR LIKE MACHINE Filed Nov. s, 1945 Patented May 31, 1949 UNITED STATES PATENT GFF-ICE WIREl LAPPING R LIKEiMACIIIlSTE;l

poration of Delaware Application November 3, 1945,' Serial No.f626,563i. In Great Britain September 28, .1944' section 1, Public-Law 690, Auguste, 1946;r`4 Patent expires September 28, 19641K 4 Claims.

This invention relates to improvements in `wire lapping or like machines for covering a wire or other core with an outer covering in the form of yarn or the like.

On conventional machines of this type for applying a textile lapping to a conductor a rotating head holds concentrically with the conductor a cop of yarn and the conductor is drawn by a capstan through the hollow centre of the head. The yarn is taken from the cop to a guide on the periphery of the head and thence back on to the conductor around which it is lapped helically by the motion of rotation of the head and supply cop, combined with the longitudinal movement of the Wire. In order to flatten the yarn, which would consist of a number of individual parallel ilaments, into a ribbon it is customary to run the yarn round the smooth surface of a guide device, hereinafter known as the spreader When a machine is used for a variety or different sizes oi centre Wire and a variety of different yarn sizes, a complete cover is secured .by variation of the throughput speed of the wire. This means that the angle of the helix is changed and the relative position of the spreader to the guide point on the head needs to be changed. This is usually done either by allowing an adequate length of spreader blade so that the yarn may run where it will or by arranging for vertical adjustment being possible either in the position of the spreader or in the position of the guide point. The long bladed spreader is inefficient since it gives inadequate support for the centre Wire and the methods of adjustment suffer from the disadvantage that adjustment is only possible when the head is stationary and the optimum adjustment can only be determined by a long and carefully handled process of trial and error.

The object of the present invention is to provide means whereby adjustment of the spreader position may be made while the machine is running, with the result that a more accurate adjustment may be obtained and the time occupied in adjustment is shorter. Experience has shown that a considerable improvement in quality results since the optimum conditions can be secured without difficulty.

According to the present invention the spreader is carried on a spindle which extends through the hollow head-driving spindle and its position is adjustable from beloW the rotary head whereby 2.. tion appliedtoa known forrmofA lapping head4 in which the single figure is a part sectional elevation of the spindle mechanism comprising the novel spreader adjustment.

The usual hollow head driving spindle is shown at I and inside this is mounted a second hollow spindle 2 which carries the spreader 3 at its tOD end. The inner spindle 2 is keyed to the main driving spindle by a key d in spindle l engaging in a keyway 5 cut in spindle 2. This permits the spindle 2 to be moved vertically with respect to l butI not to rotate relative to it. Thus the spindle 2 and with it the spreader 3 is driven round with the lapping head.

Control of the vertical movement of 2 is arranged by a thrust collar `6 integral with the spindle, as shown in the drawing or brazed to the spindle (not shown in the drawing), and two thrust washer bearings l. These bearings are held in an adjustable housing 8 by a nut S. The adjustable housing 8 is screwed into the stationary housing I0, iixed to the main frame of the machine, and fitted with a knurled head ll and a lock nut l2. In the drawing the inner assembly is shown in its uppermost position. Unscrewing the adjustable housing 8 from the xed housing ID by means of its knurled head H causes the whole inner assembly to be lowered and the spreader 3 is dropped relative to the application head. ISuch adjustment may be made while the head and the inner spindle 2 are rotatingand can be locked in any position by the nut l2.

As shown in the drawing the spreader 3 is screwed into the spindle 2 and secured by a lock nut I3 so that some adjustment of the normal position of the spreader with respect to the spindle 2 maybe obtained.

Although the various known parts of the machine have not been described it will be seen from the drawing that by adjusting the height of the spreader the relative position of the latter to ,the guide point l 4 on the head l5 is changed and the angle made by the yarn I6 on the wire Il which passes up through the centre spindle may be adjusted to the natural helix angle determined by the speed of rotation of the head and the speed of throughput of the centre core.

What is claimed is:

1. In a lapping head, a hollow--head driving spindle, a rotary head thereon, a second spinme nrw-axially mounted within said first spindle for adjusting the position of said spreader from below said rotary head While the latter is rotating.

2. A lapping head as set forth in claim 1, in which said second spindle carrying said spreader and said rst driving spindle have a ypin and slot, respectively, thereby rotatably coupling the said .two spindles and permitting relative axial movement between said spindles.

3. A lapping head as set forth in claim 1, in which `a collar and thrust bearing is provided supporting the lower end of said second spindle carrying said spreader, a housing adjustably mounted in a xed part of the machine and carrying said .bearing so that an axial movement of said housing with said thrust .bearing elects a corresponding axial movement vof said second spindle Within said irst driving spindle;

4. A lapping head as set forth in claim 1, in which a collar and thrust bearing is provided supporting the lower end of said second spindle carrying said spreader, a screw .threaded sleeve REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,433,242 Shardlow Oct. 24, 1922 FOREIGN PATENTS Number Country Date 710,109 France June 1, 1931

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