| 摘要 |
<p>923,338. Inductors. WESTERN ELECTRIC CO. Inc. April 24, 1959 [April 28, 1958 ; March 20, 1959], No. 13997/59. Class 38 (2). [Also in Groups XXIII and XXXVI] An inductor may be encapsulated in or parts of it coated with a single-phase glass consisting of arsenic, and sulphur and/or selenium and optionally, in addition, one or more of thallium, bismuth, antimony, tin, indium, lead and telluriun. The total content of bismuth and antimony must not exceed 25 % mol. of the arsenic content, the telluriun content 25 % mol. of the total sulphur and selenium, and the total content of tin, indium, and lead 25% of any thallium content. Suitable glass-forming compositions are represented by points within the areas enclosed by the solid lines in the composition diagrams of Figs. 1 and 4. Single-phase glasses may also be formed from compositions outside the enclosed areas by the addition of suitable stabilizers, or by rapid cooling of a homogeneous molten phase. Coating or encapsulation may be effected by dipping in the molten glass-forming compositions in partial vacuum or in an inert gas atmosphere, by spraying, brushing, or vacuum deposition of the composition, or by using solid preforms which are placed on the parts to be coated and then heated to plastically flow over the parts.</p> |
