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18. 发明专利

GB531890A Improvements in or relating to circuit breakers of the mercury contact type, and mercury switches 未知
公开(公告)号：GB531890A
公开(公告)日：1941-01-14
申请号：GB1098539
申请日：1939-04-11
申请人： ADLAKE CO
IPC分类号： H01H29/18
摘要： 531,890. Glass manufacture. STEVENS, A. H. (Adlake Co.). April 11, 1939, No. 10985. Drawings to Specification. [Class 56] [Also in Group XXXVII] A mercury switch has parts of refractory ceramic material fused to a sleeve of hard glass enclosing at least one electrode to protect it from the effects of arcing. Preferably the ceramic material is, basically, aluminium oxide, and the vitreous material is a boro-silicate glass such as one having the composition: SiO 2 , 76 parts: Al 2 O 3 , 4À5 parts; Na 2 O, 6 parts; K 2 O, 2À5 parts; B 2 O 3 , 11 parts.

20. 发明专利

GB473603A Improvements in mercury tube switches 未知
公开(公告)号：GB473603A
公开(公告)日：1937-10-15
申请号：GB1083836
申请日：1936-04-15
申请人： ADLAKE CO
IPC分类号： H01H29/18
摘要： 473,603. Mercury switches. BURGESS, A. F. (Adlake Co.) April 15, 1936, No. 10838. [Class 38 (v)] In a mercury tube switch in which movement of a soft iron armature 17 displaces mercury 15 to cause the completion of a circuit between electrodes 11, 12 and in which the armature is guided by members 22 that slide along the tube, the members 22 are made of relatively hard material such as steel, hardened graphite or mother-of-pearl. The members 22 may be projections on a ring 21, Fig. 3, which is held in place by a spring 19, mounted at the end of the armature on a tube 16 of quartz, glass &c., which lies within the tubular armature 17. In modifications the members 22 may be steel balls or pieces of motherof-pearl or graphite held in sockets in a ring, or a square of piano wire may be arranged on the end of the armature, its corners being adapted to slide on the glass. Specification 428,514 is referred to.

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