Winding – tensioning – or guiding – Composite article winding – On externally toothed core
Patent
1998-03-16
1999-11-23
Walsh, Donald P.
Winding, tensioning, or guiding
Composite article winding
On externally toothed core
2424373, 2424451, 29605, H02K 1509
Patent
active
059885548
DESCRIPTION:
BRIEF SUMMARY
FIELD OF ART
The present invention relates to a winding method and equipment whereby a flat linear member can be wound automatically, without being twisted, around a deflection yoke used in a cathode-ray tube such as Braun tube.
BACKGROUND ART
In winding a linear member around a deflection yoke (also called a bobbin) it is necessary that the linear member be wound orderly along winding grooves formed in the deflection yoke. However, if the linear member used is circular in section, it is dispersed and becomes unstable positionally, thus resulting in that overlap of the linear member is apt to occur. Once there occurs overlap, the winding thickness of the linear member increases and therefore the diameter of the deflection yoke must be increased accordingly, thus causing lose of the deflection efficiency.
In view of the point mentioned above, it has recently been proposed to use a flat linear member having a flat section. In this case, there is used a flat linear member having a width matching the width of each winding groove formed in a deflection yoke, and by merely stacking the linear member at the same place it is possible to wind it around the deflection yoke in an orderly manner without dispersion.
Examples of the flat linear member include such a flat linear member assembly W1 as shown in FIG. 22A, which is obtained by assembling and fusion-bonding linear members 11 of a circular section into a flat shape, and such a flat linear member assembly W2 as shown in FIG. 22B, which is obtained by assembling and fusion-bonding linear members 12 of a square section into a flat shape.
When a linear member is wound round a deflection yoke, a single winding thereof causes the linear member to be twisted once. Winding of a flat linear member is as shown in a conceptual diagram of FIG. 23. As shown therein, when a flat linear member W is wound round a deflection yoke, it is bent at four corner portions and is twisted 90 degrees at each of the corner portions. It follows that one round results in a twist of 360 degrees of the linear member W about its longitudinal axis. This twist gives rise to no special problem in the use of a linear member having a circular section, but must be eliminated in the case of winding a flat linear member in an orderly manner.
Automatic winding of a linear member around a deflection yoke also requires the twist eliminating work.
The present invention has solved the above conventional problem. It is an object of the invention to permit a flat linear member as a deflecting coil to be wound automatically around a deflection yoke without causing twist of the linear member.
It is another object of the present invention to realize automatic winding of a flat linear member in high efficiency and high accuracy without causing twist of the linear member.
It is a further object of the present invention to utilize the equipment and method of the invention for wide-angle deflection or for improving the deflection efficiency of high-frequency scan.
DISCLOSURE OF THE INVENTION
According to the present invention there is provided a winding equipment for a deflection yoke to be used for winding a flat linear member through first and second circumferential grooves formed in the deflection yoke and through winding grooves formed between the first and second circumferential grooves, the winding equipment comprising a nozzle unit, a guide unit and a holder unit, the nozzle unit having a nozzle for feeding the flat linear member, positioning means for positioning the nozzle, and rotating means for rotating and positioning the nozzle at least 180 degrees around the longitudinal axis of the linear member, the guide unit having a guide member adapted to engage and guide the linear member, positioning means for positioning the guide member, and rotating means for rotating the guide member at least 90 degrees to bend the linear member at each corner portion, the holder unit functioning to hold removably the deflection yoke for winding thereon of the linear member and index the deflection yoke around its
REFERENCES:
patent: 4027827 (1977-06-01), Biddison
patent: 4830297 (1989-05-01), Walton et al.
patent: 5360177 (1994-11-01), Lombardi et al.
patent: 5419503 (1995-05-01), Watanabe et al.
patent: 5484113 (1996-01-01), Watanabe
patent: 5573200 (1996-11-01), Sato et al.
patent: 5622331 (1997-04-01), Kosaka et al.
patent: 5794884 (1998-08-01), Dolgas et al.
patent: 5845863 (1998-12-01), Takubo et al.
Kananen Ronald P.
Marcelo Emmanuel M.
Sony Corporation
Walsh Donald P.
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