Inductor devices – Relatively movable coils – With core
Patent
1995-12-05
1997-10-14
Kozma, Thomas J.
Inductor devices
Relatively movable coils
With core
336212, 336219, H01F 1900, H01F 2724
Patent
active
056776616
ABSTRACT:
A method for the manufacture of a rotary transformer in accordance with the present invention comprises the steps of forming two cylindrical stator ferrite blocks with the same inner diameter but different outer diameters and two cylindrical rotor ferrite blocks with different inner diameters but the same outer diameter; smoothly grinding the inner and outer surfaces of the above cylindrical rotor and stator ferrite blocks and cutting them into a plurality of rotor and stator rings, respectively; applying a bonding agent to the top and the bottom surfaces of the rotor and stator rings and layering them in order to thereby form a plurality of rotor channel grooves and stator channel grooves; inserting a catalyst between the layers that form the stator and rotor channel grooves; heating and pressing together the layered rotor and stator rings in a furnace; and, after heating and pressing, threading the coils into the channel grooves and combining the rotor and stator transformers to thereby complete the rotary transformer, thus dispensing with the need to form separate short ring grooves, and reducing the proportion of defective products.
REFERENCES:
patent: 3328735 (1967-06-01), Honsinger
patent: 3531749 (1970-09-01), Treter et al.
Kozma Thomas J.
LG Electronics Inc.
White John P.
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