초록 ▼

Apparatus is provided for creating heat by electromagnetic induction between relatively rotating components. In RAT applications, part of the nose cone (34) is formed from electrically conductive material (106) which is in thermally conductive relation to the nose cone exterior. A magnetic field is

Apparatus is provided for creating heat by electromagnetic induction between relatively rotating components. In RAT applications, part of the nose cone (34) is formed from electrically conductive material (106) which is in thermally conductive relation to the nose cone exterior. A magnetic field is created by components (60) that are spaced apart from the electrically conductive material and relatively rotatable with respect to that material. The electrically conductive material intersects the magnetic field, at least in part, such that eddy currents are created in the electrically conductive material by relative rotation with respect to the magnetic field. These eddy currents create heat which is conducted to the exterior surface of the RAT nose cone. Preferably, the magnetic field is created by a pair of spaced-apart permanent magnets (60) mounted on a support plate (62) inside the RAT hub (28) and immediately behind the nose cone. The effect of the magnetic field in heating the nose cone can be increased by use of magnetically permeable material to form the support plate and/or part of the nose cone adjacent or integral with the electrically conductive material. The nose cone includes an annular lip at the outer circumferential edge thereof which permits the forces of the air stream to drive liquid from the nose cone rather than to flow down the sides thereof.

대표청구항 ▼

[ What is claimed is:] [1.] A rotary device for movement about a longitudinal axis in an air stream, comprising:a forward portion having a leading surface for receiving initial impingement of air moving within said air stream, said forward portion including electromagnetic means for inducing a flow

[ What is claimed is:] [1.] A rotary device for movement about a longitudinal axis in an air stream, comprising:a forward portion having a leading surface for receiving initial impingement of air moving within said air stream, said forward portion including electromagnetic means for inducing a flow of current in said forward portion, said flow of current creating heat adapted to melt ice tending to form on said forward portion due to passage of said forward portion through said air stream,a lip extending radially from said leading surface, anda recess formed longitudinally downstream from and adjacent to said lip, said recess separating said forward portion from a rearward portion downstream of said forward portion and thereby isolating said heat to said forward portion to more effectively melt said ice,said recess being radially inward from said lip.