发明名称 |
Vacuum switch |
摘要 |
A vacuum switch in which the diaphragm movement with increasing vacuum is opposed by two springs which determine the vacuum required to actuate the switch. As the vacuum subsequently decreases one of the springs is rendered inoperative before the switch resets so the reset vacuum is determined by the one spring remaining effective. The spring which is rendered inoperative is compressed between the actuator and an eyelet which can seat on the actuator (spring ineffective) or the housing (spring effective) and which also functions to limit motion of the actuator relative to the eyelet so the switch operated by the actuator cannot be overstressed.
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申请公布号 |
US4297552(A) |
申请公布日期 |
1981.10.27 |
申请号 |
US19800116860 |
申请日期 |
1980.01.30 |
申请人 |
THE SINGER COMPANY |
发明人 |
LAURITSEN, RICHARD L.;MANDELLOS, PANAGIOTIS K. |
分类号 |
H01H35/34;H01H35/26;(IPC1-7):H01H35/34 |
主分类号 |
H01H35/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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