Oki Electric Industry Co., Ltd.

Hochiki Corporation

Nippon Telegraph and Telephone Public Corporation

Yasuo Ohmori

Manabu Dohi

Tetsuya Nagashima

Hirokazu Ando

Kazumasa Fukushima

Yoshimi Kawabata

Tatsuya Koyama

Mitsuo Iwama

Tsunematsu Takahashi

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

Heat detector and method of manufacturing heat detecting element

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 unitthat senses heat in a monitoring area, and a casingthat holds the heat detecting unit, and the heat detecting unit is held by the casingvia a laminating portionwhich serves to protect the heat detecting unit

Heat detector

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.

Wire dot-printing head

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. A leaf spring supports the armature and is fixed to the yoke, and a print needle is mounted perpendicular to the elongated armature.

Printer head for serial dot printer

Growing community of inventors

Tokyo, Japan

Yasuo Ohmori