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    • 7. 发明专利
    • PRESSURE MEASURING DEVICE
    • JPS57211523A
    • 1982-12-25
    • JP9800381
    • 1981-06-23
    • TOKAI RIKA CO LTD
    • HORIBA TAMOTSUHIKITA SHIGEYUKI
    • G01L9/00G01L11/02
    • PURPOSE:To enable detecting of a wide-ranged change in a pressure, by a method wherein a transmitting member, altering from an optical isotropic state to an optical anisotropic state corresponding to the change in a stress, is mounted between two polarizing devices. CONSTITUTION:In case pressure to be measured applied to a diaphragm 9 is zero, a polarized light by a rectilinear polarizing plate 6 does not pass a polarizing plate 7 thereby the collecting amount of a collecting element 5, is zero. If load is applied to the diaphragm 9 and a stress is applied to a transmissing member 10, the transmissing member 10 displays an optical anisotropy, and polarized light from the rectilinear polarizing plate 6 double-refracts at the inside of the transmissing member 10. An optical path difference is produced between two components to produce an oval polarized light. The oval polarized light contains a component which can pass a rectilinear polarizing plate 7, and thereby transmitting light is collected by the collecting element 5, which results in the reduction of a resistance value.
    • 8. 发明专利
    • CERAMIC HEAT GENERATING BODY FOR CIGARET LIGHTER
    • JPS55110829A
    • 1980-08-26
    • JP1683679
    • 1979-02-15
    • TOKAI RIKA CO LTD
    • HORIBA TAMOTSUHIKITA SHIGEYUKI
    • H05B3/20F23Q7/00F23Q7/22H05B3/14
    • PURPOSE:To obtain an uniform heat generation in a heat generating portion by a method wherein the heat generating portion is formed to have an annular shape and is split so as to have a predetermined clearance between both of terminal portions thereof. CONSTITUTION:A ceramic heat generating body 1 is made of conductive materials such as SiC, (La, Sr) (Co, Cr) O3 and the like, for example, and is formed integrally as a whole. A heat generating portion 2 is formed to have an annular shape having an uniform rectangular section and a small slit 4 is provided between both of terminal portions 3a, 3b. Electrode portions 6a, 6b having substantially fan-like sections respectively are extended in parallel to an axis 0 of the heat generating portion 2 from lower surfaces of the terminal portions 3a, 3b of said heat generating portion 2. By making the sectional area of the heat generating portion 2 smaller than that of respective electrode portions 6a, 6b, a current density of the former becomes higher than that of the latter. According to this method, an electric resistance of the former becomes relatively higher, therefore, heat generation in the former becomes bigger while a heat generation of the latter becomes to be approximately 1/2 or 1/3, for example, for the former.