Attachment of leads to precision resistors

Details Attachment of leads to precision resistors Attachment of leads to precision resistors

1979-12-13

1981-08-25

Albritton, C. L.

Electrical resistors

Incased, embedded, or housed

Casing or housing formed on and hardened on resistor

338195, 338329, H01C 1034

Patent

active

042862493

ABSTRACT:
A precision resistor has a thin resistive foil cemented to a much thicker rigid substrate. The foil has formed therein a pattern defining the resistive path between terminal pads. Copper leads can be spot-welded directly to these pads without damage to the junction. To that end, apertures are provided through the terminal pads, through which cement softened by the spot-welding heat can locally expand and gas evolved under pressure can escape, all without adversely affecting the junction and without substantial lifting of the terminal pads from the substrate.

REFERENCES:
patent: 3824521 (1974-07-01), Horii et al.
patent: 3922628 (1975-11-01), Hudson et al.
patent: 4138656 (1979-02-01), Resnicow
patent: 4176445 (1979-12-01), Solow

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