U.S. Philips Corporation

Theodorus J Van Vucht

Adrianus R Engelfriet

Adriaan J Op Het Veld

The disclosure relates to the manufacture of wire-drawing dies. The disclosure provides a method for securing a core in a metal housing. The method begins with the clamping of an annulus, consisting of a hardenable metal alloy, around a cylindrical core consisting of a material such as polycrystalline diamond or boron nitride. The core is clamped so as to produce a permanent, radially compressive stress therein. The core-annulus combination is secured in a metal housing of a conventional shape.

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Eindhoven, Netherlands

Theodorus J Van Vucht