Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1992-01-13
1994-07-05
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
250561, 25022711, 324262, 356373, 356375, G01B 710, G01B 1114, G01N 2186
Patent
active
053270827
ABSTRACT:
Apparatus for measuring the thickness of a moving web of material in which a ferromagnetic core carrying a winding and a ferromagnetic disc are disposed on opposite sides of the web at constant distances therefrom with at least one of said distances being maintained by a servomechanism including an optical distance measuring device whereby the inductance of said coil is a measure of the thickness of the web.
REFERENCES:
patent: 3125624 (1964-03-01), Illig et al.
patent: 3137756 (1964-06-01), Gunther et al.
patent: 3258686 (1966-06-01), Selgin
patent: 3536405 (1970-10-01), Flower
patent: 3671726 (1972-06-01), Kerr
patent: 4053234 (1977-10-01), McFarlane et al.
patent: 4107606 (1978-08-01), Typpo et al.
patent: 4276480 (1981-06-01), Watson
patent: 4773760 (1988-09-01), Makkonen
patent: 4791367 (1988-12-01), Typpo
patent: 4849694 (1989-07-01), Coates
patent: 5021666 (1991-06-01), Reber
patent: 5074050 (1991-12-01), Williams
patent: 5109161 (1992-04-01), Horiuchi et al.
patent: 5132619 (1992-07-01), Typpo
patent: 5162661 (1992-11-01), Sato et al.
Gabura A. James
MacHattie Ross K.
McNelles Larry A.
Strecker Gerard R.
Valmet Automation (Canada) Ltd.
LandOfFree
On line electromagnetic web thickness measuring apparatus incorp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with On line electromagnetic web thickness measuring apparatus incorp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On line electromagnetic web thickness measuring apparatus incorp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-798416