Camco International, Inc.

Edward W Bryant

Burton T Mackenzie

Isaac T Reidland

A maximum temperature indicator comprises a body of inexpensive and highly durable polymeric material adapted to be affixed to a support, such as within a mechanical device. The polymeric material undergoes a detectable physical change unique to a maximum temperature to which the polymeric material was exposed. After exposure, the polymeric material is easily tested to accurately determine the maximum temperature that the sample was exposed to.

Maximum temperature indicator

A stator structure for an electric motor comprising stator windings formed with conductors coated with an insulation, such as polyetheretherketone (PEEK). At least one portion of such windings has an adhesion-resistant agent, such as a thin coat of mineral oil, applied thereto prior to the application thereto of an immobilization agent, such as a varnish. The adhesion-resistant agent prevents subsequent bending of the windings from damaging the underlying insulation thereon during the manufacture and operation of the electric motor. The prevention of such insulation damage reduces the likelihood of resulting premature motor failure.

Stator windings for electric motor

A method and related apparatuses are disclosed for coating an elongated filament, such as wire, wherein wire is coated with a heated coating material, such as polyetheretherketone (PEEK), and the coated wire is maintained at a temperature and for a period of time sufficient for a desired quantity and size of crystals to form in the coating material and to minimize internal residual stress. Thereafter, the coated wire is rapidly cooled to a temperature below its crystallization temperature, such as in a quenching bath. A crystalline PEEK coating results which has minimized internal residual stress, is less brittle, and has improved cracking, peeling and abrasion resistance over amorphous PEEK coating obtainable using prior methods.

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Lawrence, KS, United States of America

Edward W Bryant