Dosatokuseinokojoshitajiseisoshishono ichikenshutsutoransudeyuusa

摘要

1510548 Position sensing device ILLINOIS TOOL WORKS Inc 10 Nov 1975 [18 Nov 1974] 46366/75 Addition to 1496976 Heading G1N A sensing device comprises a single, unitary magnetizable element 10 having at least one through bore and magnetic means e.g. two oppositely magnetized magnets 18, 20, so arranged with respect to the element that the element is divided into a first magnetically saturated portion A and a second magnetically unsaturated portion B, B 2 , the extent or position of the saturated portion varying in accordance with the relative positions of the element and magnetic means. A single sensing wire 13, 15 passes through the bore or bores in a direction parallel to the axis thereof and an electrical lead 22, 26 is connnected to an intermediate point along the sensing wire so that the wire is divided into two portions to form circuit elements for connection in a bridge network. As shown two sensing wires 13, 15 are provided, the leads 22, 26 therefrom passing through apertures 24, 28 in the wall of the bore. A driving wire may be associated with each sensing wire Fig. 2 (not shown). In a further embodiment two parallel through bores are provided on the magnetizable element a sensing wire and a driving wore passing through both bores. The connecting point of the lead in this case is between the two bores Figs. 4, 5, 6 (not shown). In a modification Figs. 7, 8 (not shown) two sensing wires are provided