| abstract |
An apparatus for detecting properties, differences and changes in human andnimal bodies, using an a.c. source, which has one terminal that is directly or indirectly connected to the body to be examined, and an electric measuring device, which is coupled between the other terminal of the a.c. source and a sensing electrode. The sensing electrode is moved over the surface of the body and at least one spacer is provided on the sensing electrode so that the sensing electrode is spaced from the body. The electrode and the spacer are provided with at least one grounded layer, covering or shield consisting of conductive material. At least one of the layers, coverings or shields serves to shield the electrode and/or the lead connected to the electrode. The at least one grounded layer surrounding the sensing electrode consists of a conductive material serving to shield the sensing electrode and has a shield having a forward edge adapted to contact the body to be examined and to effect a grounding of the a.c. source. |