| 摘要 |
940,563. Capacitors. JOHNSON MATTHEY & CO. Ltd. July 19, 1962 [July 19, 1961], No. 26140/61. Heading H1M. In a multiple capacitor unit comprising a stack of metal coated sheets of high-temperature resisting dielectric material, the stack is impregnated and bonded with a fused glass composition or glaze. In a method of making such a unit, rectangular sheets of dielectric material, e.g. mica, are provided with platinum or silver coatings on both faces in a known manner, e.g. by painting, screen printing, or spraying. Each coating extends around one edge and over a part of both faces of the associated mica sheet, such that each sheet has two separate coatings and forms an individual capacitor. The coatings are narrower than the sheets, and each uncoated area is provided with a layer of glass, e.g. glass of the lead borosilicate, or lead alkali borosilicate, type. The sheets are subsequently stacked, subjected to pressure, and heated to bond the contiguous silver coatings and glass layers together, e.g. at a temperature of 500‹ C. Terminal wires may be soldered to the metallic coatings at the exposed edges of the sheets. |
