Metal working – Method of mechanical manufacture – Electrical device making
Patent
1987-09-10
1990-03-13
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29606, 336 60, 336 96, 336205, 336212, H01F 4106
Patent
active
049073397
ABSTRACT:
A method of constructing a distribution transformer of the type having a magnetic circuit in the form of one or more hollow coils and having primary and secondary windings by coiling an electrically insulated wire. The wires are then juxtaposed to form primary and secondary windings while interposing a flat insulating sheet material between adjacent coils. A cooling liquid is associated with the primary and the secondary coil windings and a rigid support frame is formed above these windings. A ferro-magnetic steel ribbon is coiled about at least one leg of the support frame containing the primary and secondary windings whereby to form a magnetic circuit.
REFERENCES:
patent: 2246240 (1941-06-01), Brand
patent: 3617966 (1971-11-01), Trench et al.
patent: 3960803 (1976-06-01), Smith et al.
patent: 4488135 (1984-12-01), Schwartz
patent: 4512824 (1985-04-01), Taub
Hall Carl E.
Hydro-Quebec
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