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US 4,559,703 AGranted
Process for silver plating rotary contact assemblies
AssigneeCentralab, Inc.
InventorDonald F. Gagas
Life of this patent
Estimating the term…
Abstract
A process for silver plating a rotary switch contact assembly wherein a brass metal plate and a plastic rotor retainer are first formed, force-fitted together and then silver-plated as an assembly.
Claims1
The process of making a rotary switch contact assembly comprising the steps of:
- (1) stamping a piece of hard brass plate to a desired shape;
- force fitting a molded plastic rotor retainer piece into said stamped contact plate;
- immersing said assembly of rotor retainer and contact plate in a silver plating bath having a fine silver and also having 5 mm electroless copper-plated plastic balls as fillers;
- applying a current of 40 to 50 amps for a cycle time of 20 to 25 minutes;
- removing said rotor assemblies from said bath.
2 more elements
Dependencies are inferred from the claim text.