Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1984-03-14
1986-11-18
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 585C, 324 61R, 324316, 324 585B, 333219, G01B 702, G01R 3308
Patent
active
046238352
ABSTRACT:
The thickness of a web is measured by passing the web through the gaps of a loop-gap resonator. Changes in web thickness alter the resonant frequency of the resonator which is detected by a control circuit. Three embodiments of the invention are described, and in one embodiment, the moisture content of the web is also measured.
REFERENCES:
patent: 3514703 (1970-05-01), Soga
patent: 4435680 (1984-03-01), Froncisz
patent: 4446429 (1984-05-01), Froncisz
patent: 4504788 (1985-03-01), Froncisz
"Extrusion Web Thickness Sensors: Which is Right for Your Needs?", By Edward L. Sarber, Marketing Manager, Measurex Corp., Plastics Technology, Jun. 1983.
"Measurement Thickness + Basis Weight--Control Quality + Economy"--Lippke Microcomputer (Brochure) for Blown Film, Flat Film, Co-Extrusion and Coating.
"Gauge Systems and Interlayer Measuring in Co-Extrusion Blown-Cast Film and Sheeting", by Peter G. Mercer, Systems Development Engineer, Paul Lippke GmbH & Co. KG.
"On-Line Measurement & Control Systems for Continuous Process Lines"--Brochure by NDC.
"Magnetic Media Thickness Gauge and Control System--Model 7105", Brochure by NDC Systems.
"Measurex System 2002"--Brochure by Measurex, 1981.
Froncisz Wojciech
Hyde James S.
Mehdizadeh Mehrdad
Eisenzopf Reinhard J.
Medical College of Wisconsin, Inc.
Sammons Barry E.
Solis Jose M.
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