CAPACITOR IMPREGNATED WITH ELECTROLYTE AND OIL CONTAINING DEPOLARIZER

• US 3,678,345 A
• Filed: 01/22/1971
• Issued: 07/18/1972
• Est. Priority Date: 01/23/1970
• Status: Expired due to Term

• Current Assignee: Adam Ruttkay, Niels Hvidtfeldt
• Original Assignee: Adam Ruttkay, Niels Hvidtfeldt
• Inventors: Hvidtfeldt, Niels, Ruttkay, Adam
• Primary Examiner(s): Kallam, James D.
• Application Number:
  US05/108,925
• Time in Patent Office: 543 Days
• Field of Search: 317/230,231,233
• US Class Current: 361/507
• CPC Class Codes: H01G 9/00 Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture

Abstract

An electrolytic capacitor comprises a capacitance element consisting of a convolutely wound metal and spacer strip assembly, which is impregnated with an electrolyte and additionally impregnated with oil which also completely fills a metal can in which the capacitance element is enclosed.

Claims

2. A capacitor as in claim 1, in which the depolarizing substance contained in said insulating oil is p-nitro-benzoeacid-ethylester.

3. A method of manufacturing an electrolytic capacitor comprising the steps of winding at least one strip of pre-formed metal and a porous spacer strip to produce a convolutely wound assembly, impregnating said assembly with an electrolyte containing a depolarizing substance, applying a voltage higher than the intended maximum operating voltage between said metal strip and said electrolyte to post-form said metal strip, and impregnating said Assembly with an insulating oil which is not capable of solving components of said electrolyte and which contains a depolarizing substance different from that contained in said electrolyte.

4. A method as in claim 3, in which the depolarizing substance contained in said insulating oil is p-nitro-benzoeacid-ethylester.