Sprague Electric Company

Raynor Linzey

Sidney D Ross

George A Shirn

Herbert L Rice

Carol A Cushenette

A self-healing metallized film capacitor has a dielectric sheet metallized with a metal or alloy so chosen to provide the desired sheet resistivity for a given metallization thickness. The invention applies to any metallized film capacitor in which electrode metallization thickness and clearability are important considerations.

Metallized film capacitor process

An ester dielectric fluid for an AC capacitor with improved corona properties contains a minor amount of tert-butylanthraquinone. The ester may be 2-ethylhexylphthalate or diisononylphthalate, and an epoxide stabilizer is present.

Ester dielectric fluid containing tert-butyl anthraquinone

An oil filled capacitor has an exothermically alloyable fuse strand within the closed housing that is filled with a dielectric oil. A circuit interruptor means is included within the housing that interrupts a capacitor section to housing terminal connection either in response to overpressure or to overtemperature within the housing, or both. The fuse strand is part of that connection and a portion of the fuse is located at the predetermined point of potential interruption so that any arcing that occurs across the gap of the opened connection will kindle the fuse which in turn will be completely obliterated and quench the arc.

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Adams, MA, United States of America

Raynor Linzey