会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 9. 发明专利
    • Improvements in and relating to light current electric switches
    • GB744811A
    • 1956-02-15
    • GB2987949
    • 1949-11-22
    • NSF LTDKENNETH GRAHAM SMITH
    • H01H1/10H01H23/12
    • 744,811. Snap-action switches; contactmembers for switches. N. S. F., Ltd., [formerly BRITISH N. S. F. CO., Ltd.], and SMITH, K. G. Nov. 22, 1950 [Nov. 22, 1949], No. 29879/49. Class 38(5) A switch comprising two blade spring- contact members 2, 3 adapted to be bridged by a moving rigid contact member 4, has each of the edges of the contact member 4 which make contact with the members 2, 3, provided with a plurality of projectins or serrations 4c. The moving contact member 4 is a U-shaped metal stamping having small lugs 4a, 4b projecting from the tips of the arms of the U, the lugs serving as pivot pins and being disposed in recesses formed in projections 1a 1b of the switch body 1. The fixed contacts 2, 3 are shaped as shown for insertion and retention in recesses in the body 1. The moving contact 4 is actuated by a dolly 5 pivoted in a sleeve member 7, an overcentre compression spring 9 extending between the rounded end 5a of the dolly and a projection 4d on the contact 4. The projections 4c may be shaped so that initially some only engage the fixed contacts, the other projections coming into use as wear occurs. The contacts may be arranged so that arcing can only occur at parts of the contact surfaces other than the "working" surfaces.