Electrolyte capacitors with improved anode-to-lead connection

Details Electrolyte capacitors with improved anode-to-lead connection Electrolyte capacitors with improved anode-to-lead connection

1978-11-20

1981-10-20

James, Andrew J.

Electricity: electrical systems and devices

Miscellaneous

29570, 174 505, 174 5057, H01G 900, B01J 1700

Patent

active

042964580

ABSTRACT:
A method of assembling an electrolytic capacitor comprise the following steps: an annular sleeve shaped cathode is inserted into the open end of a can; an anode structure is inserted into said can in a spaced apart relationship from said cathode, the space between said anode and cathode being filled with an electrolyte, said anode structure having an aperture or recess for reception of an anode lead; a primary seal, for sealing the open end of the can, and comprising an anode lead electrically isolated from the rest of the seal; is formed; a secondary seal is positioned on the anode lead on the inside face of said primary seal to form a seal between said anode lead and said can prior to sealing of the primary seal of said capacitor; the end of the anode lead projecting from said secondary seal is machined to provide projections on said lead; the capacitor is assembled by forcing the projecting portion of said anode lead into said anode until the primary seal is in position; the primary seal is welded around its periphery to said can; and the capacitor is subjected to an aging process to restore any damage to said anode and anode lead structure incurred during the assembling/forcing operation.

REFERENCES:
patent: 2871424 (1959-01-01), Aikman
patent: 3243316 (1966-03-01), O'Nan et al.
patent: 3293507 (1966-12-01), Smith
patent: 3302072 (1967-01-01), Oneil
patent: 3314124 (1967-04-01), Okamoto et al.
patent: 3321675 (1967-05-01), Diggens
patent: 3534230 (1970-10-01), Krasienko et al.
patent: 3624458 (1971-11-01), Howell
patent: 3684927 (1972-08-01), Correll
patent: 3906311 (1975-09-01), Shoot et al.
patent: 4025827 (1977-05-01), Pellerin

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