An Anchor Technology, Inc. Website

Solon manufacturing Co. makes Belleville Springs & Pressure Switches.
Belleville Spring, Disc Spring, Conical Compression Washer are all names for the same type of spring. This is a conical shaped disc that will deflect(flatten) at a given rate. Belleville Springs are used in a variety of applications where high spring loads are required. They are particularly useful where vibration, differential thermal expansion, relaxation, and bolt creep are problems.