Tubular capacitor with variable capacitance and...

Details Tubular capacitor with variable capacitance and... Tubular capacitor with variable capacitance and...

2008-07-01

2008-07-01

Thomas, Eric (Department: 2831)

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

C361S321600

Reexamination Certificate

active

07394642

ABSTRACT:
A tubular capacitor with variable capacitance, including a cylindrical tube (3) of dielectric material, a metallic outer electrode (1) which surrounds the cylindrical tube (3), and an inner electrode which can axially move in the inner bore (41) of the cylindrical tube (3) and which abuts the inner bore (41), wherein the inner electrode includes a metallic rod (2; 2a; 2b; 2c), is characterized in that the metallic rod (2; 2a; 2b; 2c) is axially extended at its end (5′), located in the inner bore (41) of the cylindrical tube (3), using a rod (9; 9a; 9b; 9c) of dielectric material. The inventive tubular capacitor has an increased dielectric strength and improves the resolution of NMR spectrometers.

REFERENCES:
patent: 3329875 (1967-07-01), Demeritt
patent: 3360700 (1967-12-01), Ainley
patent: 3361945 (1968-01-01), Mittler et al.
patent: 3731165 (1973-05-01), Solow
patent: 3938012 (1976-02-01), Patti
patent: 4389762 (1983-06-01), Reeves
patent: 5856769 (1999-01-01), Kiser
patent: 2003/0137300 (2003-07-01), Gonella
patent: 2005/0168223 (2005-08-01), Zeiger et al.
patent: 1 108 809 (1963-10-01), None
“Avance—The Pulse Of Innovation”, Bruker BioSpin AG, Faellanden, Switzerland Apr. 2004.

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