Apparatus for the measurement of the movement of a member horizontally relative to a datum
US4507603A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1982 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Jun 11, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2417
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A plumb bob (11) having an upwardly extending tube (12) is located in a support tube (10) having grooves (20) in which are laid sheathed cables (22). The support tube (10) has windows (21) across groups of which pass the bare conductor elements (23) of the cables (22). The upwardly extending tube (12) forms an energizing electrode and the bare conductor elements (23) form two pairs of orthogonally disposed electrodes (30) capacitatively related to the electrode formed by the upwardly extending tube (12). Horizontal movement of the support (10), and hence any structure in which it is located, creates a capacitative charge between the electrodes which allows the movement to be measured in magnitude and direction. The apparatus has one application to the measurement of horizontal movement in a liquid metal cooled nuclear reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.