| 摘要 |
<p>An electromagnetic coil comprises a rigid bimetallic plate of substantially uniform thickness and spiral configuration, the axis of the spiral extending in the direction of the thickness of the plate, the plate consisting of a first metal component and a second metal component laminated thereto, the plate having inner and outer convolutions provided with means for securing said convolutions to a rigid support structure, and means providing terminal connections to the coil.</p> |
