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Cam switches: Difference between revisions
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There were different forms of contact fingers in use. | There were different forms of contact fingers in use. | ||
The basic type, as described in the patent drawings (also in use in the [[back-lit switches|back-lit pushbuttons]] have a contact spring on a post soldered into the board. | The basic type, as described in the patent drawings (also in use in the [[back-lit switches|back-lit pushbuttons]]) have a contact spring on a post soldered into the board. | ||
Another type, used in high-frequency attenuators types, has a spring riveted to the board, with a small multi-fingered, gold-plated contact spring element isolated by a molded plastic assembly. In these, the spring is typically grounded, and the isolated contact fingers bridge adjacent pads when actuated. | Another type, used in high-frequency attenuators types, has a spring riveted to the board, with a small multi-fingered, gold-plated contact spring element isolated by a molded plastic assembly. In these, the spring is typically grounded, and the isolated contact fingers bridge adjacent pads when actuated. | ||
Some switch assemblies also have contacts on the opposite side of the PCB, actuated via small plastic plungers. | Some switch assemblies also have contacts on the opposite side of the PCB, actuated via small plastic plungers. | ||
Finally, the [[067-0587-02]] plug-in uses a special [[Media:7104_maintenance.pdf|elastomer-based cam switch]] | Finally, the [[067-0587-02]] plug-in uses a special [[Media:7104_maintenance.pdf|elastomer-based cam switch]]. | ||
==Maintenance== | ==Maintenance== | ||