Block position and speed transducer for a computer-controlled oil drilling rig
US4119837A · kind A · utility
6Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1977 |
| Grant date | Oct 10, 1978 |
| Priority date | — |
| Expiry date | Mar 15, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/232
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.