Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1974-10-01
1976-09-07
Krawczewicz, Stanley T.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 30B, G01R 2726
Patent
active
039796663
ABSTRACT:
A method and apparatus are provided for nondestructively evaluating physical properties of materials, and particularly semiconductive or electrically conductive fibers, e.g., carbonaceous fibrous materials containing at least about 90 per cent carbon by weight. The material is disposed in spaced relationship to a test electrode in an electrolytic solution and the physical property of the fiber is evaluated by evaluating the capacitance of the material. This capacitance evaluation may then be compared to the capacitance evaluation of a reference material having predetermined physical properties with the results of the comparison indicating the properties of the tested material. This indication may be utilized in the quality control of manufactured fibers by manual or automatic adjustment of the manufacturing process conditions. In fiber experimentation, this indication may be utilized to provide an evaluation of the effectiveness of an experimental process.
REFERENCES:
patent: 2942181 (1960-06-01), Edwards et al.
patent: 2966628 (1960-12-01), Bosch
patent: 3371568 (1968-03-01), Felix
patent: 3778705 (1973-12-01), Maltby
Kalniv Ilmar L.
MacLean Alexander F.
Celanese Corporation
Krawczewicz Stanley T.
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