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专利名称：Expansion switch 发明人：KESSELRING FRITZ 申请号：US46132530augenstern什么意思
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申请日：19300616
昨日重现歌词公开号：US1948761A
sunny是什么意思公开日：
19340227
专利内容由知识产权出版社提供结合滤波器
the ro歌词
摘要：354,890. High-tension switches. SIEMENS-SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. May 27, 1930, No. 16361. Convention date,' June 18, 1929. [Class 38 (v).] In A.C. switches the arc is extinguished by opening the circuit under a conducting or miconducting liquid, such as water, in a vapour chamber which is kept clod until most of the liquid has been turned to vapour at a high pressure. The chamber is then suddenly opened to relea the pressure, the conquent expansion of the vapour extinguishing the arc at the zero of the cycle. A vapour chamber 20 containing the fixed contact 27 has an upper insulating part and a lower part 21 of metal up to the level of the insulating liquid, which may be water or an electrolyte. When the switch is opened, the arc formed caus the liquid to vaporize, and as the movable contact 29 leaves the opening 30 in the chamber, a sudden expansion of the vapour occurs whereby the vapour condens about the ions and deionizes the arc path. The vapour is condend in a chamber 23 insulated from earth by a condenr-type insulator 25 and communicating with the chamber 20 through a non-return valve 33. In another form, Fig. 4 (not shown), a space is provided above the aperture 30 communicating by means of two pipes with an overhead condensing chamber from which the liquid can be returned to the vapour chamber. Two vapour-breaks in ries may be arranged in parallel with a main air-break, the whole
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being pneumatically operated, Fig. 3 (not shown). The Specification as open to inspection under Sect. 91 (3) (a) refers also to the u, as switch liquids, of oil, mercury, and carbonic acid. This subject-matter does not appear in the Specification as accepted.
the pretty reckless申请人：WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
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