| 摘要 |
<p>The variable inductance miniature coil with the winding housed between ring shaped ferrite core portions, as in 2237251, has a variable ring-shaped core portion (34) with a recess to receive a thin member (a) shaped as an incomplete ring, supported on a thicker portion (c) of a shape similar to the latter, being a fixed part. The adjustable part (34) has an adjusting disc (36) engaged by a shouldered internally threaded bush (37) which fits in its top face, and screws onto the top (38) of a spindle (39) projecting upwards from the base (3). The base (47) of the thicker incomplete ring (c) recess on a C-shaped spring (45, 46) and both fit into a groove (44) in the base part.</p> |
