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US 4,516,103 AGranted
Plug-in arrangement and process for tin plating contacts of a plug-in arrangement
AssigneeMeteor AG
InventorErnst Arnold
Life of this patent
Estimating the term…
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AssigneeMeteor AG
InventorErnst Arnold
Estimating the term…
The present invention relates to a plug-in arrangement for circuit boards and a process for tin plating contact pins of the arrangement. The present invention improves the tinning of winding end portions of a winding about nonmetallic contact pins on coil forms. The contact pins are adapted for connection with printed circuits. The present invention discloses contact pins in one piece, or with multiple parts, which pins are given a profiled configuration on an outer surface. The contact pins may have different profiled shapes or configurations including grooves. In the case of multiple part contact pins, gaps are provided between the parts. The grooves or gaps permit the escape of gas generated upon the burning of an enamel insulation layer on the winding end portions. Also, the end portions rest above bottoms of the grooves or gaps such that the end portions are surrounded with tin solder.
A plug-in arrangement for printed circuits, comprising electric coil windings surrounding a coil form having contact pins, the coil form and the contact pins being nonmetallic, end portions of the windings surrounding the contact pins, the contact pins being profiled and having continuous channels extending in the longitudinal direction along an axis of the contact pins, said channels creating spaces between said pins and said surrounding end portions which extend generally transverse to said channels, and solder beneath said end portions in said spaces.
A process for tinning of a plug-in arrangement, the plug-in arrangement including electric coil windings surrounding a non-metallic coil form having non-metallic contact pins formed integrally therewith, the contact pins having a profiled exterior surface and creating channels, comprising the steps of winding end portions of the windings generally transversely around the longitudinal axis of the profiled pins such that spaces formed by said channels exist between the end portions and the profiled surface, immersing the contact pins in a tin bath, and permitting the spaces to be filled with tin to surround the end portions and to retain said end portions to the contact pins.
Dependencies are inferred from the claim text.