Inductor devices – With outer casing or housing – Internal inductor support
Patent
1996-05-08
1998-03-10
Kozma, Thomas J.
Inductor devices
With outer casing or housing
Internal inductor support
336 96, 336192, 336198, 336210, H01F 2702, H01F 2730
Patent
active
057266166
ABSTRACT:
A transformer assembly, particularly for data and audio signals, has first and second bobbins which are telescoped within one another. An assembly cap is fitted around the bobbins and includes flanges for locating a core. The bobbins and the cap are designed such that creepage and clearance requirements are met. The core is preformed or comprises laminations formed as E's and I's, which are then fitted through the assembly cap and the bobbins. The cap provides a receptacle for the core, and retains the laminations in position. To secure the laminations in position, an assembly cup is mounted around the outside of the laminations. The assembly cup can include springs or the like, to maintain the laminations in position and allow for expansion and contraction. The springs can additionally mechanically secure the transformer in position. The bobbins, cap, core and cup can be encapsulated together.
REFERENCES:
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patent: 4716394 (1987-12-01), Gordon
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Norwe Electronic Components--"EFD 209-SMD Surface Mount Assembly".
Cosmo--"International Design Transformer Bobbins" pp. 19&20 from Miles Platts Inc/Ltd.
Imperial Range--"Standard Coil Formers for Inperial Lamination".
Ny-Glass Plastics, a Division of Calnetics Corporation--"EI-21 Bobbin".
IBM Technical Disclosure Bulletin, "Bobbin Set For a Low Profile, Safety Approved Transformer", Apr. 1988, vol. 30, No. 11, pp. 58,59.
Electronic Craftsmen Limited
Kozma Thomas J.
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