Abstract: A solderless connector especially suited for interconnecting a flexible circuit to another circuit or component, either rigid or flexible, is presented. The solderless connector of the present invention utilizes the pressure mating of contact areas with the added advantage of a wiping or cleaning action on the contacting surfaces. In one embodiment of the present invention, this wiping action is achieved by bending or crimping the two layers adjacent to the contact areas, thereby causing them to have mutual relative sliding motion over each other as they are being pressed into contact therebetween. In another embodiment, the bending or crimping of the flexible circuit layers is accomplished in the structure of the solderless connector itself.

Abstract: A solderless connection method and apparatus is presented wherein means are provided to either gradate or minimize the change in impedance between the contact portions of circuits which are to be connected therein. In a first embodiment of the present invention, a solderless electrical connector is provided in which impedance is gradated between the two different characteristic impedances of the circuits which are to be connected. The procedure for carrying out such a gradual change in impedance is the change in dielectric constant caused by compression of a shaped cellular polymeric material. In a second embodiment, a solderless electrical connection is provided which applies even pressure across the circuit element, but which also has a low dielectric constant. Such a connector includes syntactic foam produced by adding hollow microspheres, such as glass or silica microspheres, to an elastomer.

Abstract: A molding compound is disclosed comprising a diallyl phthalate compound and capsules of water.

Abstract: Rubber, e.g., butadiene-acrylonitrile copolymer rubber, in readily friable or free flowing powdered form is prepared by halogenating (e.g., chlorinating) the rubber in particulate form in an aqueous medium. Sodium hypochlorite/acid or chlorine water may be used as the chlorinating agent. Preferred bound chlorine content of the treated rubber is at least 0.1%.