Abstract High voltage circuit arrangement includes a load connected to a power supply of at least 20,000 volts, and a single discrete high voltage electrical resistor connected to the power supply and load. The high voltage resistor comprises a spiral resistive path supported on a ceramic substrate which provides a uniform and continuous heat dissipation path between the ends of the resistor. A heat dissipating mounting member forms an electrical termination for the resistor, rapidly transfers heat away from the substrate, and includes a substrate alignment surface and seat in close proximity to a surface of the substrate. A threaded portion of the heat dissipating member is useful for mounting the resistor on a supporting surface and insulative means including an insulative jacket surrounds the substrate. High voltage corona inhibiting means include an insulative body that extends one-half inch beyond an end of the resistive path and embeds a lead wire connected to the resistive path. The resistive path is a cermet film type material having resistivity of 5 megohms per square, a voltage coefficient of less than 400 parts per million per volt per square, and a voltage withstanding ability of 3,000 volts per inch of resistive path. The resistive path itself comprises an intersticed mass of inert particles and a conductive phase forming an interstitial mass within the intersticed mass.
A resistor for use in a high voltage circuit wherein a potential of at least 20,000 volts is applied to said resistor, said resistor comprising a high heat resistant electrically nonconductive cylindrical substrate, a spiral cermet film resistive path supported on the substrate, terminations electrically connected to the resistive path, and a heat dissipating mounting member having a substrate alignment surface in close proximity to a surface of the substrate and a seat adjacent to the substrate alignment surface bearing against the substrate, said substrate providing a single continuous heat transfer path between the ends of the resistor, said mounting member providing a thermally conductive path for dissipating heat from the substrate.
Claim 2
Dependent Claim
112 words
A resistor for use in a high voltage circuit wherein a potential of at least 20,000 volts is applied to said resistor, said resistor comprising a high heat resistant electrically nonconductive cylindrical substrate, a spiral cermet film resistive path supported on the substrate, terminations electrically connected to the resistive path, and a heat dissipating mounting member having a substrate alignment surface in close proximity to a surface of the substrate and a seat adjacent to the substrate alignment surface bearing against the substrate, said substrate providing a single continuous heat transfer path between the ends of the resistor, said mounting member providing a thermally conductive path for dissipating heat from the substrate.
Claim 3
Dependent Claim
46 words
The resistor of claim 1 wherein the heat dissipating mounting member is electrically conductive and a deposit of solder electrically connects the heat dissipating mounting member to the resistive path and provides a path for the transfer of heat from the substrate to the mounting member.
Claim 4
Dependent Claim
26 words
The resistor of claim 1 wherein the heat dissipating mounting member includes a threaded portion thereby to facilitate mounting of the resistor on a supporting surface.
Claim 5
Dependent Claim
35 words
The resistor of claim 2 wherein a jacket is secured to said mounting member, said jacket encircles said substrate and is spaced therefrom, and an insulative material is disposed between said jacket and said substrate.
Claim 6
Dependent Claim
20 words
The resistor of claim 4 wherein said heat dissipating mounting member supports the substrate and the jacket in spaced relationship.