Variable autotransformer
United States Patent 3368140

Inventors:
Tobey, Frederic S.
Publication Date:
02/06/1968
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Assignee:
BRADY CO W H
Primary Class:
323/345
Other Classes:
323/327, 327/582, 361/91.700, 336/222, 327/447
International Classes:
G05F1/445; G05F1/10
US Patent References:
3147928Lighting device
3149296Shielded transformer
3263157Regulator circuit
3292127Closed circuit resistive shielding for multiwinding transformers