Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-11-07
2006-11-07
Lefkowitz, Edward (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207180, C324S207240
Reexamination Certificate
active
07132825
ABSTRACT:
A device for detecting the displacement of an object comprising a ferromagnetic material, comprises a magnetic circuit generator provided with first and a second cores made of ferromagnetic material and an excitation coil and a measurement coil. The magnetic circuit generator is connected to a detecting unit designed to detect a reluctance variation brought about in the circuit by the displacement of the object and to deduce therefrom its position. In the device, the magnetic circuit generator comprises first and second transformers with open magnetic circuit, the transformers being juxtaposed and comprise each an axis extending across their respective core, the axes extending substantially perpendicular to the path. The excitation coil comprises two coils connected in series which form the primary windings of the first and second transformers. The measurement coil comprises two coils connected in series which form the secondary windings of the first and second transformers, the primary and secondary windings being connected in opposite phase.
REFERENCES:
patent: 1659729 (1928-02-01), Gannett
patent: 3246219 (1966-04-01), Devol et al.
patent: 3290487 (1966-12-01), Scott
patent: 3401284 (1968-09-01), French
patent: 3617874 (1971-11-01), Forster
patent: 3906339 (1975-09-01), Leisterer
patent: 3961214 (1976-06-01), Lokkart
patent: 4717874 (1988-01-01), Ichikawa et al.
patent: 4786869 (1988-11-01), Kanai et al.
patent: 4945274 (1990-07-01), Pernpeintner
patent: 5010298 (1991-04-01), Uemura
patent: 5115194 (1992-05-01), Luetzow et al.
patent: 5117181 (1992-05-01), Clergeot et al.
patent: 5293031 (1994-03-01), Goto et al.
patent: 5793197 (1998-08-01), Shirai et al.
patent: 6208135 (2001-03-01), Shattil
patent: 6566862 (2003-05-01), Goto et al.
patent: 3326476 (1985-02-01), None
patent: 361086647 (1986-05-01), None
Jacobson & Holman PLLC
Lefkowitz Edward
Universite de Liege
Whittington Kenneth J.
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