Patent ID: 7145329
Filing Date: 2006-12-05
Classification: B25C,B25F,G01V

Abstract:
1. A manually operated working tool including an internal combustion operated setting tool for driving in fastening elements including one of nails, bolts, pins into a magnetizable substrate, having an inductive metal detector assembly ( 20 ) with at least one excitation coil arrangement ( 21 ) and evaluation means, wherein the inductive metal detector assembly ( 20 ) has a means for generating an alternating current for the excitation coil arrangement ( 21 ) having at least two consecutive frequencies (f n ) from a starting frequency (f 0 ) to an end frequency (f max ), wherein the inductive metal detector assembly ( 20 ) has an evaluation coil arrangement ( 22 ) that is arranged externally around the excitation coil arrangement, and wherein the evaluation means of the inductive metal detector assembly ( 20 ) has a correlator means ( 25 ) for compensation of a system-internal harmonic pattern.