초록 ▼

A continuous ribbon resistor element having a plurality of conjunctive lengths alternately connected by reflexes is supported in a frame comprised of silicon bonded laminated mica. The ribbon elements are formed with a single, flat convolution center offset to one side of an original plane and later

A continuous ribbon resistor element having a plurality of conjunctive lengths alternately connected by reflexes is supported in a frame comprised of silicon bonded laminated mica. The ribbon elements are formed with a single, flat convolution center offset to one side of an original plane and lateral portions offset to an opposite side of the plane, joined to the center offset by transition portions such that the centroid for any transverse cross section lies on the original plane. The offsets originate at flat end portions near the reflexes and have maximum offset intermediate the ends. Metal members are received in openings of the laminated mica insulators to receive threaded fasteners when attaching an insulator in edge-wise relationship to another. Thermally conductive termination connections are brought outside the frame and airflow passageway to remove from the passageway the additional heat otherwise absorbed by the terminals.

대표청구항 ▼

[ What is claimed is:] [1.] A ribbon type grid resistor for forced ventilation convective heat transfer applications, said resistor comprising:a ribbon of resistance material having reflexes and conjunctive lengths between said reflexes, each of said conjunctive lengths having coplanar opposite end

[ What is claimed is:] [1.] A ribbon type grid resistor for forced ventilation convective heat transfer applications, said resistor comprising:a ribbon of resistance material having reflexes and conjunctive lengths between said reflexes, each of said conjunctive lengths having coplanar opposite end portions at junctures with respective said reflexes, said conjunctive lengths each having a transverse cross section having a central portion offset in a first direction and lateral edge portions offset in a second direction opposite said first direction such that a centroid of said cross section lies in a plane containing said coplanar opposite end portions, said offset central and lateral edge portions tapering from said end portions to a maximum offset at a longitudinal midpoint of said conjunctive length.