Abstract
A general picture is given of the development work involved in the introduction of manufacturing processes for vitreous enameled resistances, vitreous enameled iron and copper base number plates, pressed glass lenses, extruded and pressed porcelain parts, and close tolerance ceramic insulators for use in telephone apparatus. The reasons for undertaking the manufacture of these products, some of the major problems encountered in developing suitable processes, and the work done in overcoming these difficulties including several major contributions to commercial methods of manufacturing similar parts are described.
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