摘要 |
The PTC element comprises one body (10) provided with two parallel large surfaces, of an electrically conductive polymer composition with a positive temperature coefficient. Each body is provided with two large preferably parallel surfaces. If a body contacts an electrode, one of its surfaces makes free contact with its associated electrode (11). - When there are two or more bodies which contact each other via their large surfaces, one pair of these contacting surfaces make free contact with each other and/or one of the surfaces which contact an electrode makes free contact with its associated electrode. A pressured device is adapted to exert on the electrodes a pressure directed perpendicular to the large surfaces on the bodies. The parallel surfaces on the body of polymer composition may be concentric. |