发明授权
- 专利标题： Vacuum actuated switch
- 专利标题（中）： 真空启动开关
-
申请号： US963002申请日： 1978-11-22
-
公开(公告)号： US4190752A公开(公告)日： 1980-02-26
- 发明人: David W. Rogers
- 申请人： David W. Rogers
- 申请人地址： MI Detroit
- 专利权人： General Motors Corporation
- 当前专利权人： General Motors Corporation
- 当前专利权人地址： MI Detroit
- 主分类号： H01H35/34
- IPC分类号： H01H35/34
摘要：
A vacuum actuated switch has a pair of snap action contacts which are actuated in response to the operation of two vacuum motors. One vacuum motor controls the opening and closing of the contacts in a first predetermined range of vacuum. The other vacuum motor extends the range of operation to a second and larger predetermined range of vacuum wherein one limit of the second range is the same as the first range.
公开/授权文献
- US06131322A Sign plate for illuminated sign 公开/授权日：2000-10-17