Abstract: To provide a heat detector in which thermal responsiveness of a heat detecting unit such as a ceramic element is improved. A heat detector 1 includes a ceramic element 10 accommodated in a sensing-device main body, and measures a temperature in a monitoring area based on a dielectric constant of the ceramic element 10. The Curie point temperature of the ceramic element 10 is set in a predetermined sensitive temperature range.

Abstract: An object is to build a protective structure which can protect a ferroelectric material from a surrounding environment when the ferroelectric material is used as a heat detecting element of a heat detector, thereby enhancing the reliability of the heat detector. A heat detector includes a heat detecting unit 11 that senses heat in a monitoring area, and a casing 81 that holds the heat detecting unit 11, and the heat detecting unit is held by the casing 11 via a laminating portion 60 which serves to protect the heat detecting unit 11.

Abstract: An object is to build a protective structure which can protect a ferroelectric material from a surrounding environment when the ferroelectric material is used as a heat detecting element of a heat detector, thereby enhancing the reliability of the heat detector. A heat detector includes a heat detecting unit 11 that senses heat in a monitoring area, and a casing 81 that holds the heat detecting unit 11, and the heat detecting unit is held by the casing 11 via a laminating portion 60 which serves to protect the heat detecting unit 11.

Abstract: [Object] To provide a heat detector in which thermal responsiveness of a heat detecting unit such as a ceramic element is improved. [Means] A heat detector 1 includes a ceramic element 10 accommodated in a sensing-device main body, and measures a temperature in a monitoring area based on a dielectric constant of the ceramic element 10. The Curie point temperature of the ceramic element 10 is set in a predetermined sensitive temperature range.

Abstract: A method for providing information or a printed matter of the information smoothly in a meeting place such as a museum or an exhibition is provided. A card reader reads an ID card that a tourer carries, so as to obtain information relating to an exhibit corresponding to the card reader. Then, the obtained information is printed and is passed to the tourer.

Abstract: A method for providing information or a printed matter of the information smoothly in a meeting place such as a museum or an exhibition is provided. A card reader reads an ID card that a tourer carries, so as to obtain information relating to an exhibit corresponding to the card reader. Then, the obtained information is printed and is passed to the tourer.

Abstract: A wire dot-printing head has an armature, a printing wire fixedly mounted on a tip end of the armature, a leaf spring fixedly mounted in one end thereof on a rear end of the armature and fixed in the other end, a spring branch part provided on the leaf spring in the vicinity of the fixed end of the leaf spring, and an adjusting screw adjustable from the outside to be brought into close contact with the spring branch part for deflecting the leaf spring for thereby adjusting a deflection of the leaf spring and thereby an impact force of the printing wire.

Abstract: An engine includes a double barreled carburetor. A sensor mounted to the exhaust system detects the concentration of a component in the exhaust. A control unit, based on a signal from the sensor, dispatches a control signal to an air bleed control valve to vary its resistance. Primary and secondary path systems lead from the outlet of the air bleed control valve and respectively supply primary bleed air into the fuel which is being supplied into the primary barrel of the carburetor and secondary bleed air into the fuel which is being supplied into the secondary barrel of the carburetor. A one way valve is fitted in the secondary path system so as to allow air flow only towards the secondary barrel, and not away therefrom.

Abstract: A high operational speed print head for mosaic printing is provided which has a plurality of print needles positioned on a straight line, each being selectively driven toward a piece of paper through an ink ribbon. The printer head comprises a cylindrical permanent magnet ring magnetized in the axial direction; a circular bottom plate covering the bottom of the permanent magnet; and a plurality of electromagnets each having a center core and a coil wound around the core positioned on a circle on said bottom plate so as to be surrounded by the permanent ring magnet. A yoke provides a closed magnetic path with the permanent ring magnet, the bottom plate and each of the electromagnets. A plurality of moving bodies equal in number to the number of electromagnets are provided, each having at least an elongated armature overlying the core of the related electromagnet and composing a part of said closed magnetic path.

Abstract: Ferroelectric ceramic compositions consisting essentially of quaternary solid solutions of Pb(Fe1/2.Nb1/2)O.sub.3 --Pb(Zn1/3.Nb2/3)O.sub.3 --PbZrO.sub.3 --PbTiO.sub.3, the components of which are within a defined range of relative proportions, have substantially higher insulation resistance characteristics and substantially higher electromechanical coupling coefficient characteristics than prior art compositions. Additionally, the components within a more restricted range of relative proportions have the additional characteristic of a higher Poisson's ratio than prior art compositions.