Hitachi Metals, Ltd.

501 Hitachi Metals, Ltd.

Masao Ogata

Nobuo Kakinuma

Masahiko Fukui

Hiromi Sako

The weft winder for a weaving machine has (a) a non-magnetic, hollow-cylindrical outer frame member having an inner conical surface at one end thereof; (b) a rotor disposed rotatably and concentrically with the outer frame member, which is only rotatable; (c) a non-magnetic, inner frame member rotatably supported by the rotor and having an outer conical surface facing the inner conical surface of the outer frame member via a gap therebetween; (d) a pipe projecting from an outer end of the rotor and extending in the gap for guiding a weft; and (e) a plurality of magnet members each constituted by a plate-shaped magnet and a yoke and fixed to the inner conical surface and the outer conical surface, respectively, such that N poles and S poles of the magnets are circumferentially arranged alternately and that different magnetic poles of the magnet members are opposing each other via the gap. The magnet in each magnet member is magnetized in a thickness direction such that a magnetic pole on a front surface facing the gap has a larger magnetic flux density than that of a magnetic pole on a rear surface.

Weft winder for weaving machine having magnets with different surface

The magnet article for attracting foreign matters in the stomach is constituted by (a) a hollow cylindrical case made of a corrosion-resistant, non-magnetic material: (b) a plurality of disc-shaped yokes made of a soft magnetic material; (c) a plurality of disc-shaped magnet members made of an R-Fe-B permanent magnet material and having magnetic poles on both end surfaces, the disc-shaped magnet members being arranged alternately with the disc-shaped yokes in the hollow cylindrical case such that the magnetic poles having the same polarity of the adjacent disc-shaped magnet members face each other via each disc-shaped yoke; and (d) a pair of end covers made of a corrosion-resistant, non-magnetic material, each end cover being fixed to each end of the hollow cylindrical case so that the inside of the hollow cylindrical case is sealed.

Magnet article for attracting foreign matters in the stomach

A convergence device for electron beams in a color picture tube includes a pair of four-pole magnet rings, a pair of six-pole magnet rings and a pair of two-pole magnet rings, the absolute value of the temperature coefficient of magnetization of which is equal to or less than 0.05%/.degree. C. measured in a temperature range of 0.degree. C. to 120.degree. C.

Convergence device for electron beams in color picture tube

There is provided a gap in a magnetic circuit of an iron core inductor, and a plurality of small size permanent magnet pieces are placed in the aforesaid gap, with the magnetizing directions thereof being provided in side-by-side relation. If the magnetizing direction of the permanent magnet pieces is opposed to that of a D.C. magnetic field which is produced in a magnetic circuit, yet in case D.C. and A.C. overlapping currents flow through the inductor, then the D.C. magnetic field produced in the magnetic circuit will be off-set thereby, providing a high inductance value, while eddy currents produced within the permanent magnet pieces due to the A.C. magnetic field will be reduced to a considerable amount, because the permanent magnet pieces are small in size, thus minimizing the heat to be produced in the permanent magnet pieces.

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Honjyo, Japan

Masao Ogata