US 4,342,893 A · Composite electrical contact and bonding material

Abstract

To permit direct bonding of a composite electric contact-and-bonding material to a carrier, such as a reed, magnetic strip, or the like, by thermo-electric heating, the side of the contact-and-bonding material is formed with projections, preferably projecting ridges, ribs, or beads, and a bonding or solder material in wire form is adhered, by rolling on to the valley between the projecting ridges, the bonding or soldering material leaving space free between adjacent ridges or ribs and not filling the entire recess, but projecting outwardly at least as far as the projections or ridges, and preferably slightly therebeyond. The soldering or bonding wire may have round or polygonal, preferably triangular cross section with a pointed tip extending outwardly to provide for concentration of heat upon resistance heating the contact material against the carrier strip.

Claims11

Dependent claims

Composite electrical contact-and-bonding material for bonding to a metallic carrier (11) comprising

an elongated strip of contact material having a first contacting surface and an obverse bonding surface for bonding to said carrier, in which said bonding surface is formed with at least two projections (3) which define a recess (4) therebetween,
and wherein, in accordance with the invention,
the projections comprise at least two parallel elongated ridges or elongated ribs or elongated beads (3) defining a valley (4) between adjacent ridges, ribs or beads, said valley forming the recess;
and wherein a bonding wire (5, 5') is provided, positioned in the valley between the ridges, ribs or beads,
said wire forming a bonding material, being secured to the bottom of the valley, only partly filling said valley, and having a dimension extending therefrom which is at least as high as the ridges or ribs or beads adjacent the valley.

2 more elements

Dependencies are inferred from the claim text.

Composite electrical contact and bonding material

Life of this patent

Composite electrical contact and bonding material

Life of this patent

Abstract

Claims11