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3.5. The contrivance for rewinding untwisted thread to a saving spool

When a lace maker is preparing to plate a new lace, she creates some stock of split threads and saves it using accessible bearers including different spools and even cardboard strips. Flat strips are undesirable since the thread keeps tracks of bends.

On this reason cylindrical spools are preferable but they are not manufactured for lace makers in Russia. It is pity but there are no standards for lace thread spools. In that case the third operation is necessary to rewind thread. Consequently an additional contrivance is needed to accelerate rewinding and escape excessive touching to thread by fingers.

As soon as there are no satisfactory decisions of the problem, we are to solve two tasks:

- select the suitable spools for thread saving;

- invent a contrivance to rewind threads from stationary intermediate spools to the saving spools.

Both tasks are to be decided by common efforts: a lace maker offers her own standard for the saving spool and a designer invents a contrivance fit to the spool.

Authors of the book decided to use a plastic package applied in homoeopathy as mass production. It is the cylindrical capsule with 22 mm (» 0.9 inch) in diameter and 39 mm (» 1.5 inch) in length. Three operations are needed to transform a capsule to the spool:

- delete a lid;

- make a hole in the bottom with an awl; it is necessary to set the spool at the rewind device;

- set on the capsule a steel hair-pin (Fig.3.8); it is useful to attach the thirst coil on the spool.

Fig.3.8. Saving spool

Ii is recommended to shorten a little the hair-pin. Of course one may not use the hair-pin, winding 2-3 start coils of the thread.

The rewinding operation is very simple itself but one is to pay attention on many hard restrictions:

- uniform arranging of coils;

- constructive attachment of two units intended to split and rewind thread;

- keeping the special trajectory of thread going from the intermediate spool to the saving spool;

- quick setting of the empty spool and quick taking it down after rewinding.

All the mentioned demands can be fulfilled with the following units:

- the unit to set the empty spool for rewinding;

- the reducer of gyration rate from the fly-wheel to the sheave of the mechanism laying coils;

- the transformer of gyration to swaying movements of guiding fork;

- the unit forming the trajectory of the thread from the source spool to the saving spool.

Cinematic scheme of the contrivance contains two units:

- the reducer and the spool holder (Fig.3.9);

- the movement transformer;

Fig.3.9. The reducer and the spool holder

The bearing center 1 is set oh the base 2 that moves along guiding rods 3 attached to the platform 4.

Three gyration axes are set at the vertical platform 5. The spool chuck 6 and the sheave 7 are at the first axe. The sheave 7 and the fly-wheel 8 are joined as a belt pair that enlarges gyration rate.

The fly-wheel 8 and the sheave 9 are at the second gyration axe. The third axe carries the sheaves 10 and 11. Two pairs 9-10 and 11-12 reduce gyration rate of the fly-wheel.

The eccentric disk 13 is set on the sheave 12. The roller 14 is pressed to the shiver rim with the spring 15. The lever 16 drives the mechanism of laying coils on the spool.

The bearing center 1 is pulled right with a spring that is not shown on the scheme.

All units can be seen on Fig.3.10, Fig.3.11, Fig.3.12.

Fig.3.10. Contrivance for rewinding. Front view

Fig.3.11. Contrivance for rewinding. Plan view

Fig.3.12. Contrivance for rewinding. Side view