Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Reexamination Certificate
2005-09-13
2005-09-13
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
C361S058000, C361S111000, C361S120000
Reexamination Certificate
active
06944005
ABSTRACT:
A surge-protected coaxial termination includes a metallic outer body, a center conductor extending through a central bore of the outer body, and a spark gap created therebetween to discharge high-voltage power surges. A pair of dielectric support insulators support the center conductor on opposite sides of the spark gap. High impedance inductive zones surround the spark gap to form a T-network low pass filter that nullifies the additional capacitance of the spark gap. An axial, carbon composition resistor is disposed inside the outer body, and inside the dielectric insulator to absorb the RF signal, and prevent its reflection. The resistor extends co-axially with the center conductor, and one end of the resistor is electrically coupled thereto. A blocking chip capacitor extends radially from the opposite end of the resistor to the grounded outer body. The opposing second end of the resistive component may protrude from the metallic outer body and related dielectric material; the DC blocking capacitor preferably extends radially between the second end of the resistive component and the metallic outer body, or to a grounding post secured thereto.
REFERENCES:
patent: 5508873 (1996-04-01), Knapp et al.
patent: 5724220 (1998-03-01), Chaudhry
patent: 5768084 (1998-06-01), Chaudhry et al.
patent: 5790361 (1998-08-01), Minich
patent: 6751081 (2004-06-01), Kooiman
Corning Gilbert Inc.
Glazer Marvin A.
Homa Joseph M.
Jackson Stephen W.
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