Method and apparatus for determining the concentricity of wire within its coating of insulation

Claim 1

A method for viewing, under a microscope, the end of a sample of insulation formerly covering a wire, in order to determine the concentricity of the insulation with the wire comprising: a. adjusting the microscope to focus on an object placed at a predetermined distance above the stage or supporting table of the microscope; b. cutting only through the insulation of a length of insulated wire at a first point thereon; c. grasping the insulated wire on opposite sides of said first point and pulling in opposite directionS, leaving behind a piece of insulation per se; d. perpendicularily cutting completely through the piece of insulation at a second point spaced from said first point by said predetermined distance to obtain a sample of insulation suitable for viewing the cross section thereof under the microscope; e. placing the sample of insulation under the microscope in a vertical position, locating said second point at said predetermined distance above the stage or supporting table of the microscope.

Claim 2

A method for viewing, under a microscope, the end of a sample of insulation formerly covering a wire, in order to determine the concentricity of the insulation with the wire comprising: a. adjusting the microscope to focus on an object placed at a predetermined distance above the stage or supporting table of the microscope; b. cutting only through the insulation of a length of insulated wire at a first point thereon; c. grasping the insulated wire on opposite sides of said first point and pulling in opposite directionS, leaving behind a piece of insulation per se; d. perpendicularily cutting completely through the piece of insulation at a second point spaced from said first point by said predetermined distance to obtain a sample of insulation suitable for viewing the cross section thereof under the microscope; e. placing the sample of insulation under the microscope in a vertical position, locating said second point at said predetermined distance above the stage or supporting table of the microscope.

Claim 4

A method for viewing, under a microscope, the end of a sample of insulation formerly covering a wire and deposited on the latter by an extruder, in order to determine the concentricity of the insulation with the wire comprising: a. adjusting the microscope to focus on an object placed at a predetermined distance above the stage or supporting table of the microscope; b. marking the insulated wire as it exits the extruder so as to orient it with respect to the extruder; c. cutting off a length of the marked insulated wire; d. cutting only through the insulation of the length of insulated wire at a first point thereon; e. grasping the insulated wire on opposite sides of said first point and pulling in opposite directions, in a manner such as to leave behind a piece of marked insulation pr se; f. perpendicularly cutting completely through the piece of insulation at a second point spaced from said first point by said predetermined distance in a manner such as to obtain a sample of marked insulation suitable for viewing the cross section thereof under a microscope; g. placing the marked sample of insulation under the microscope in a vertical position, locating said second point at said predetermined distance above the stage or supporting table of the microscope.

Claim 5

A method for viewing, under a microscope, the end of a sample of insulation formerly covering a wire and deposited on the latter by an extruder, in order to determine the concentricity of the insulation with the wire comprising: a. adjusting the microscope to focus on an object placed at a predetermined distance above the stage or supporting table of the microscope; b. marking the insulated wire as it exits the extruder so as to orient it with respect to the extruder; c. cutting off a length of the marked insulated wire; d. cutting only through the insulation of the length of insulated wire at a first point thereon; e. grasping the insulated wire on opposite sides of said first point and pulling in opposite directions, in a manner such as to leave behind a piece of marked insulation pr se; f. perpendicularly cutting completely through the piece of insulation at a second point spaced from said first point by said predetermined distance in a manner such as to obtain a sample of marked insulation suitable for viewing the cross section thereof under a microscope; g. placing the marked sample of insulation under the microscope in a vertical position, locating said second point at said predetermined distance above the stage or supporting table of the microscope.