Gas-filled surge arrester, activating compound, ignition stripes and method therefore
AssigneeLittelfuse, Inc.
InventorsKelvin Loader, Stephen J. Whitney
Life of this patent
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Abstract
A gas-filled surge arrester includes at least two electrodes, a gas filling and an activating compound applied to at least one of said electrodes. The activating compound can include: (i) nickel powder in an amount of about 10% to about 35% by weight; (ii) potassium or sodium silicate in an amount of about 20% to about 40% by weight; (iii) titanium powder in an amount of about 5% to about 25% by weight; (iv) calcium titanium oxide in an amount of about 5% to about 15% by weight; and (v) sodium bromide in an amount of about 10% to about 20% by weight. Ignition striping process and resulting stripes from ink-jetting of striping material are disclosed.
Claims27
A surge arrester comprising:
- at least two electrodes;
- an enclosed gas;
- and
- an activating compound applied to at least one of said electrodes, the activating compound including
- nickel powder in an amount of about 10% to about 35% by weight,
- potassium metasilirate in an amount of about 10% to about 20% by weight,
- aluminum silicon powder in an amount of about 5% to about 20% by weight,
- sodium carbonate in an amount of about 5% to about 20% by weight, and
- cesium chloride in an amount of about 25% to about 45% by weight.
A surge arrester made via a process comprising the steps of:
- providing an insulative housing;
- enclosing the housing with at least two electrodes, at least one of the electrodes having an applied activating compound;
- and
- ink-jetting multiple ignition depositions disposed onto an interior of the housing, the depositions including at least one non-graphite material, said depositions disposed on the interior of said housing such that said depositions do not form a conductive path between said electrodes.
A surge arrestor made via a process comprising the steps of:
- providing an insulative housing;
- enclosing the housing with at least two electrodes, at least one of the electrodes having an applied activating compound;
- and
- ink-jetting multiple depositions disposed onto an interior of the housing, the deposition including a pattern of droplets, said depositions disposed on the interior of said housing such that said depositions do not form a conductive path between said electrode.
A system for depositing a plurality of stripes within a surge arrester comprising:
- a holder configured to secure a housing, said housing having a substantially circular cross section and a first longitudinal length, said housing extending within said holder at least a portion of said first longitudinal length;
- a reservoir configured to contain striping material;
- a nozzle including a relatively thin tube having a second longitudinal length corresponding to the first longitudinal length, said tube having a cross section configured to fit within said housing, said tube including at least one orifice disposed along said second longitudinal length;
- a supply line connected between said reservoir and said nozzle, said supply line configured to supply said striping material to said nozzle wherein said striping material is disposed on a surface of said housing in droplets projected from said orifice to form each of said plurality of stripes.
Dependencies are inferred from the claim text.