Patent ID: 6316846
Filing Date: 2001-11-13
Classification: H01B,H01H

Abstract:
A pressure sensor characterized in that a cord switch is used in which 4n wire electrodes (n represents a positive integer) are spirally arranged along the inner surface of an insulator hollowed in the cross section, which comprises a restorative rubber or plastic material, in the longitudinal direction in a situation where said wire electrodes are not electrically contacted each other, and said wire electrodes are fixed to said hollowed insulator in a state where the wire electrodes are projected from said insulator; in one end of said cord switch, a power supply is connected between said two wire electrodes, and a current adjusting resistor is connected between other two said wire electrodes; in other end of said cord switch, said wire electrodes are connected each other to form a serial circuit comprising said power supply, said current adjusting resistor and said wire electrodes.