Positioning device for presenting samples for electromagnetic analysis
US5167160A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Positioning apparatus for presenting a sample for electromagnetic analysis comprises a flexible, resilient, generally cylindrical, open-ended inner sleeve member having a lengthwise through slit, such that the effective diameter thereof is adjustable over a predetermined range in response to radially inward compression thereof. An elongate constricting assembly surroundingly engages and selectively applies radially inward compression to the inner sleeve member. The constricting assembly comprises a pair of generally rigid, cylindrical axially spaced gripping members and a plurality of resilient, helical members coupled intermediate the gripping members. The helical members are responsive to relative rotation of the gripping members in a first direction for applying radially inward compression to the inner sleeve member, and responsive to relative rotation of the gripping members in an opposite direction for releasing radially inward compression on the inner sleeve member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.