Inductor devices – With supporting and/or spacing means between coil and core – Preformed insulation between coil and core
Reexamination Certificate
2005-09-27
2005-09-27
Nguyen, Tuyen T (Department: 2832)
Inductor devices
With supporting and/or spacing means between coil and core
Preformed insulation between coil and core
Reexamination Certificate
active
06950005
ABSTRACT:
Methods and apparatus are disclosed for a tunable inductor. A coil of electrically conducting material is wrapped around a coilform, preferably generally cylindrical in shape. The coilform is constructed having a threaded portion of screw-like ridges with troughs between the ridges. The coilform may also have an unthreaded portion. The ridges and troughs of the threaded portion may run along substantially all of the coilform or just a portion of the coilform. As the coilform is rotated, the electrical conductor is engaged in the threads, changing the shape of the coil, and thereby also changing the inductance of the coil.
REFERENCES:
patent: 3432785 (1969-03-01), Solmos
patent: 3437968 (1969-04-01), Hildebrandt
patent: 4035740 (1977-07-01), Schafer et al.
patent: 4109224 (1978-08-01), Liautaud
patent: 4170014 (1979-10-01), Sully
“A Transmit-Only/Receive-Only (TORO) RF System for High-Field MRI/MRS Applications” by Enzo A. Barberi, Joseph S. Gati, Brian K. Rutt and Ravi S. Menon, Magnetic Resonance in Medicine, pp. 43:284-289 (2000).
http://www.cis.rit.edu/class/schp730/lect/lect-17.htm, Magnetic Resonance Imaging by Joseph P. Hornak, Ph.D., pp. 1-11.
Christopherson Scott Lee
Gillard Edward Charles
Gilliland Don Alan
Nguyen Tuyen T
Williams Robert R.
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