Inductor devices – Coil or coil turn supports or spacers – Coil turns cemented to support or embedded in plastic
Patent
1980-08-14
1982-06-15
Robinson, Ellis P.
Inductor devices
Coil or coil turn supports or spacers
Coil turns cemented to support or embedded in plastic
1741205R, 336206, 428324, 428363, 428413, 428417, 428418, 428429, 428447, 428454, 528 16, 528 27, 528 92, 4284735, H01F 2732, B32B 1900, B32B 2738
Patent
active
043353673
ABSTRACT:
An electrically insulated coil is composed of a coil and a mica tape containing a first resinous composition, wound upon the coil; the resinous composition containing a maleimide compound, an epoxy resin, a curing catalyst consisting of an aluminum compound, and a curing accelerator selected from the group consisting of a silane compound having a hydroxyl group and a polysiloxane compound having a hydroxyl group; the curing catalyst and the curing accelerator each being in an amount of about 0.0001 to 5% by weight based on the total amount of the maleimide compound and the epoxy resin; and the resinous composition being cured by heating after the mica tape is wound around the coil.
The electrically insulated coil may further contain a second resinous composition comprising an epoxy resin and an acid anhydride, the second resinous composition impregnating the mica tape after the mica tape is wound around the coil, and being heat-cured together with the first resinous composition.
REFERENCES:
patent: 3618753 (1971-11-01), Glasspoole
patent: 3624032 (1971-11-01), Miyashiro
patent: 3926885 (1975-12-01), Keil
patent: 3971747 (1976-07-01), Bank
patent: 4013987 (1977-03-01), Foster
patent: 4082719 (1978-04-01), Liles
patent: 4237262 (1980-12-01), Jones
patent: 4239998 (1980-12-01), Hakamada
patent: 4244911 (1981-01-01), Ishizaka
Hayase Shuzi
Inoue Yoshiyuki
Ito Takeo
Kumazawa Ryozi
Mitsui Hisayasu
Robinson Ellis P.
Tokyo Shibaura Denki Kabushiki Kaisha
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