Patent ID: 8739657

Claim:
A wire stripper configured to feed stripping blades into coating of an electric wire and to strip a part of the coating by moving the stripping blades relatively against the electric wire comprising: an electric signal generator circuit that applies an electric signal to the stripping blades; a signal analyzer circuit that detects an electric signal changed by a contact of the stripping blades with a wire core of the electric wire; a shielded wire that transmits the electric signal to the stripping blades and the changed electric signal from the stripping blades through a center conductor (signal line); and a signal applying means that applies a signal having the same level as that of the electric signal or/and the changed electric signal to a shielding material arranged in an outer periphery of an insulating coating of the center conductor, so that when the stripping blades contact the wire core of the electric wire in a process of stripping the coating from the electric wire, the changed electric signal is detected from the stripping blades, and thereby a contact of the stripping blades with the wire core is detected, and the signal applying means reduces or prevents current leakage between the center conductor of the shielded wire and the shielding material of the shielded wire in the detection.