发明名称 |
Crane trolley speed limiter |
摘要 |
Apparatus for limiting the speed of a crane trolley along a runway has a sectionalized control rail providing maximum allowable speed reference voltages. A pilot generator driven by the trolley drive motor provides an actual speed voltage. When the actual speed voltage reaches the reference voltage level at any trolley location a dynamic braking circuit is activated.
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申请公布号 |
US3908939(A) |
申请公布日期 |
1975.09.30 |
申请号 |
US19740444428 |
申请日期 |
1974.02.21 |
申请人 |
UNITED STATES STEEL CORPORATION |
发明人 |
SHEFFLER, RALPH W. |
分类号 |
B60L3/08;B66C13/50;(IPC1-7):B61L3/18 |
主分类号 |
B60L3/08 |
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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