Low leakage capacitor header and manufacturing method therefor

• US 4,521,830 A
• Filed: 04/30/1984
• Issued: 06/04/1985
• Est. Priority Date: 12/24/1981
• Status: Expired due to Fees

• Current Assignee: Cornell-Dubilier Marketing Inc.
• Original Assignee: Sangamo Weston, Inc. (Atos SE)
• Inventors: Aultman, William H., Reese, Morris T.
• Primary Examiner(s): GRIFFIN, DONALD
• Application Number:
  US06/605,440
• Time in Patent Office: 400 Days
• Field of Search: 361/306, 361/307, 361/327, 361/433, 174/52 S, 174/52 PE, 174/50.5
• US Class Current: 361/500
• CPC Class Codes: H01G 9/10 Sealing, e.g. of lead-in wires

Abstract

A capacitor header having the mechanical characteristics of a modulus of elasticity in the range from 50,000 to 200,000 psi and a tensile strength in the range from 3,500 to 80,000 psi has pressure formed therein on the aluminum terminal of which portions thereof have been increased in the range of 0.002 to 0.020 inch larger than the holes provided in the header.

Claims

1. A capacitor header for sealing a container open to one end thereof, comprising:

a header disposed within and sized to close said open end of said container, said header having the mechanical characteristics of a modulus of elasticity in the range from 50,000 to 200,000 psi and a tensile strength in the range from 3,500 to 80,000 psi, said header having at least one through hole provided therein having a predetermined diameter; and

at least one cylindrical terminal formed as a solid, unitary body from an electrically conductive material and having a modulus of elasticity in the range from 2 million to 11 million pounds per square inch and a yield strength in the range from 10,000 to 80,000 psi, said terminal being disposed in said through hole and extending therefrom, said terminal having a portion in contact with said through hole with a diameter in the range of 0.002 to 0.020 inch larger than said predetermined diameter.

2. The capacitor header as claimed in claim 1, wherein each said terminal is of a nonsolderable electrically conductive material including a terminal extension connected to each said terminal, said terminal extension being formed from a conductive solderable material different from that which each said terminal is formed.

3. The capacitor header of claim 1 wherein said portion of said terminal which is in contact with said through hole has a diameter in the range of 0.006 to 0.010 inch larger than said predetermined diameter of the through hole into which it is disposed.

4. The capacitor header of claim 1 wherein the stress between said portion of said terminal and said predetermined diameter of the through hole into which it is disposed is in the range from 1,740 psi to 17,400 psi.