Inductor devices – Coil wrapper on binder
Patent
1977-07-28
1979-07-10
Kozma, Thomas J.
Inductor devices
Coil wrapper on binder
H01F 2730
Patent
active
041609670
ABSTRACT:
An electrical coil assembly comprises a rectangular, flat annular coil and a flexible annular covering of, for example, fibre board sheet surronding the coil so as to provide a substantially dustproof seal. The covering is formed by folding and glueing a blank around the coil. The blank comprises a rectangular annular portion a first pair of flaps extending one from each of two opposite outer peripheral sides of the annular portion, a second pair of flaps extending one from each of two opposite sides of the inner periphery of the annular portion and further flaps extending from the outer periphery of the annular portion. The annular portion is provided with fold lines and is of a size, when folded, to overlie opposite faces of the coil and the flaps fold around the inner and outer peripheries of the coil to provide a substantially dustproof seal.
REFERENCES:
patent: 1797768 (1931-03-01), Goad
patent: 2243553 (1941-05-01), D'Entremont
patent: 2275967 (1942-03-01), Keillor et al.
patent: 2749525 (1956-06-01), Henderson
patent: 3092797 (1963-06-01), Wood
patent: 3237137 (1966-02-01), Flaminio
patent: 3287681 (1966-11-01), Caldwell
patent: 3317875 (1967-05-01), Williams
patent: 3378800 (1968-04-01), Libermen
Kozma Thomas J.
Lucas Industries Limited
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