Double insulated transformer of the coaxial type and method of a

Details Double insulated transformer of the coaxial type and method of a Double insulated transformer of the coaxial type and method of a

1990-08-30

1993-04-06

Kozma, Thomas J.

Inductor devices

With outer casing or housing

Exposed core portions

336192, 336198, 361 41, H01F 2702, H01F 2730

Patent

active

052007316

ABSTRACT:
A double-insulated transformer of the coaxial type comprises a core assembly having a center core, a primary winding assembly assembled to surround coaxially the center core which has a primary bobbin case, a primary coil winding wound around the bobbin case and a primary terminal portion provided at an axial end of the bobbin case for connecting the primary coil winding and input lead lines, a secondary winding assembly to surround coaxially the primary winding assembly which has a secondary bobbin case, a secondary coil winding wound around the secondary bobbin case and a secondary terminal portion provided at an axial end of the secondary bobbin case opposite to the primary terminal portion for connecting the secondary coil winding with external lead lines, and an insulating case assembled to surround coaxially the secondary winding assembly. The insulating case comprises a body portion of tube-like shape for covering the secondary coil winding and at least one covering portion formed integrally on an axial end of the body portion and extending along the axial direction for covering one of the primary and secondary termianl portions. By the insulating case provided, the coverage and protection of the secondary coil winding and terminal portions can easily and effectively carried out.

REFERENCES:
patent: 3213397 (1965-10-01), Broverman
patent: 4000483 (1976-12-01), Cook et al.
patent: 4027279 (1977-05-01), Shigehara
patent: 4234865 (1980-11-01), Shigehara

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