Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural active motor elements
Patent
1993-01-08
1995-05-09
O'Shea, Sandra L.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural active motor elements
324146, 336188, H01F 2728, G01R 120
Patent
active
054143500
ABSTRACT:
A rotating magnetic measuring instrument including a form for receiving thereon first and second coil windings, with the second coil being wound within the first coil. The second coil includes a section thereof wound in a reverse direction for reducing the effective magnetic moment of the second coil so as to be substantially equal in magnitude to the effective magnetic moment of the first coil. The rotating magnetic measuring instrument also includes a magnetic indicator carried by the coil form that is rotated by to magnetic moments produced by the flow of current through the first and the second coils.
REFERENCES:
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patent: 3660814 (1972-05-01), Fales
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patent: 3747036 (1973-07-01), Erdmann
patent: 4633174 (1986-12-01), Lingdig et al.
patent: 4827210 (1989-05-01), Lindig et al.
patent: 5047715 (1991-09-01), Morgenstern
patent: 5061891 (1991-10-01), Totsuka et al.
patent: 5243277 (1993-09-01), Totsuka et al.
Dixon Richard D.
Ford Motor Company
May Roger L.
O'Shea Sandra L.
Patidar Jay M.
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