发明名称 |
Block position and speed transducer for a computer-controlled oil drilling rig |
摘要 |
Apparatus for indicating the position of a traveling block along a vertical axis within a computer-controlled oil drilling rig is characterized by a magnetically responsive element for generating a pulse when a metallic member, movable with the traveling block, passes in proximity thereto. A counter is operatively associated with the magnetically responsive element to count the pulses therefrom. An electrical signal of a predetermined magnitude functionally related to the output of the counter is representative of the position of the traveling block.
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申请公布号 |
US4119837(A) |
申请公布日期 |
1978.10.10 |
申请号 |
US19770777927 |
申请日期 |
1977.03.15 |
申请人 |
BJ-HUGHES INC. |
发明人 |
SHELDON, LOREN B.;TOMASHEK, JAMES R. |
分类号 |
G05B19/23;(IPC1-7):G06M3/14 |
主分类号 |
G05B19/23 |
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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