Claims
- 1. 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.
- 2. A pressure sensor according to claim 1 wherein a part of said respective wire electrodes are embedded into said insulator hollowed in the cross section.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-315515 |
Dec 1995 |
JP |
|
7-331788 |
Dec 1995 |
JP |
|
Parent Case Info
This application is a Divisional of application Ser. No. 08/875,742, filed Jan. 16, 1998 now U.S. Pat. No. 6,078,014, which is a 371 of International Application No. PCT/JP96/03537, filed Nov. 29, 1996.
US Referenced Citations (13)
Foreign Referenced Citations (3)
Number |
Date |
Country |
36-17654 |
Jul 1961 |
JP |
36-28334 |
Oct 1961 |
JP |
39-4926 |
Feb 1964 |
JP |