发明授权
- 专利标题: Mining machines
- 专利标题(中): 采矿机
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申请号: US660814申请日: 1976-02-24
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公开(公告)号: US4062593A公开(公告)日: 1977-12-13
- 发明人: Terence John Gapper , Owen O'Neill
- 申请人: Terence John Gapper , Owen O'Neill
- 申请人地址: EN London
- 专利权人: Coal Industry (Patents) Limited
- 当前专利权人: Coal Industry (Patents) Limited
- 当前专利权人地址: EN London
- 优先权: UK11622/75 19750320
- 主分类号: E21C31/10
- IPC分类号: E21C31/10 ; E21C35/12
摘要:
A linear potentiometer is attached to the ranging arm of a ranging arm shearer such that it slides on the upper flange of the face conveyor to sense the height of the cutter drum relative to the conveyor.
公开/授权文献
- US6038443A Calling party announcement apparatus 公开/授权日:2000-03-14
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