Method and apparatus for making an electrical coil with insulate

Details Method and apparatus for making an electrical coil with insulate Method and apparatus for making an electrical coil with insulate

1979-04-30

1981-04-21

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

295644, 29855, 29860, H01F 4110, H01R 4300

Patent

active

042624134

ABSTRACT:
This method makes an electrical coil from conductive wire having an insulating coating bonded thereto and provides the coil with at least one conductive lead. The coil winding operation is stopped when a predetermined wire region is located at a work station, where a section of the insulating coating is removed, thereby exposing a section of bare wire. Then there is placed in contact with the section of bare wire and cold-welded thereto a thin conductive strap that extends transversely of the wire and forms said lead. Then the cold-weld joint and a portion of the lead are covered with electrical insulation by applying to opposite faces of the lead two strips of insulating material that extend transversely of the wire on opposite sides of the wire. Then the strips are bonded together, following which the winding operation is continued to complete the coil with said strips extending generally parallel to the coil axis.
Apparatus is provided for automatically carrying out this coil-making and lead-applying method. Also the coil structure that is made by this method is disclosed and claimed.

REFERENCES:
patent: 2534119 (1950-12-01), Gethman
patent: 2845693 (1958-08-01), Shetterly et al.
patent: 3060073 (1962-10-01), Horn
patent: 3363309 (1968-01-01), Logan et al.
patent: 3412450 (1968-11-01), Whiteman et al.
patent: 3488839 (1970-01-01), Proxmire
patent: 3527138 (1970-09-01), Boltz
patent: 3534312 (1970-10-01), Grasinger
patent: 3596843 (1971-08-01), Lightner et al.
patent: 3925885 (1975-12-01), Smith
patent: 3961417 (1976-06-01), George

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