Rectangular electric contact for switch

Claim 1

A rectangular electric contact for use in a switch, which comprises a base piece containing therein a rectangular through hole and a contact piece filling up said rectangular hole and having opposite end portions extending out of the upper and lower edges of said hole, said contact piece being cut from an elongate strip of material comprising at least two layers of dissimilar materials, and said contact piece having a uniform rectangular cross sectional shape from end to end and comprising at least two layers of dissimilar materials, said contact piece having a width equalling one of the sides of the rectangular holes and being cut from the elongate strip of material and substantially simultaneous therewith being insertion in the hole so that the uppermost layer thereof protrudes from the upper surface of said base piece and then substantially simultaneous with the inserted step being pressed in an axial direction of the hole to laterally expand the contact piece for tight fitting engagement in the hole, and the extended end portions having a rectangular shape which is somewhat greater than said rectangular hole and is similar in shape thereto.

Claim 4

A method for the manufacture of a rectangular electric contact which comprises the steps of: forming rectangular through holes at fixed intervals in a stock for base pieces; cutting layered contact pieces with a rectangular configuration of a profile identical to the profile of the rectangular holes out of an elongate, rectangularly shaped stock for contact pieces, said stock having a width equalling one of the sides of the rectangular holes and comprising at least two layers of dissimilar materials; inserting, substantially simultaneously with the cutting step, the contact pieces in the rectangular holes; pressing, substantially simultaneously with the inserting step, the contact pieces set in position in the rectangular holes in opposite directions and crushing the portions of the contact piece protruding from the opposite sides of the rectangular hole to give rise to contacts which are somewhat larger in size than the rectangular holes and similar in shape thereto.

Claim 5

A method for the manufacture of a rectangular electric contact which comprises the steps of: forming rectangular through holes at fixed intervals in a stock for base pieces; cutting layered contact pieces with a rectangular configuration of a profile identical to the profile of the rectangular holes out of an elongate, rectangularly shaped stock for contact pieces, said stock having a width equalling one of the sides of the rectangular holes and comprising at least two layers of dissimilar materials; inserting, substantially simultaneously with the cutting step, the contact pieces in the rectangular holes; pressing, substantially simultaneously with the inserting step, the contact pieces set in position in the rectangular holes in opposite directions and crushing the portions of the contact piece protruding from the opposite sides of the rectangular hole to give rise to contacts which are somewhat larger in size than the rectangular holes and similar in shape thereto.