Yamaha Corporation

Enshu Limited

Toshiyuki Suzuki

Yoichi Misawa

Takayuki Suzuki

Tatsuhiro Koike

Hisashi Ukai

Satoshi Suzuki

Yasuhiko Asahi

Minoru Kitamura

A method of cutting metal materials and non-metal materials in a non-combustible gas atmosphere, the method including forming a non-combustible gas atmosphere, providing the non-combustible gas atmosphere to at least one of a cutting part of a machine tool and an area adjacent to the cutting part, and machining the metal materials and the non-metal materials using the cutting part, and where the non-combustible gas includes one of nitrogen gas and carbon dioxide gas, and where the non-combustible gas occupies a proportion of at least 90% of the non-combustible gas atmosphere.

Method of cutting of metal materials and non-metal materials in a non-combustible gas atmosphere

A nitrogen gas supply system for dry-cut working machine, comprising a nitrogen gas generator for separating and extracting only nitrogen gas from the atmosphere, and a supplier for sending the extracted nitrogen gas to a working part. The nitrogen gas obtained from the atmosphere can effectively be supplied to a workpiece.

Nitrogen gas supply system for dry-cut working machine

Keyboard instruments incorporating sound systems for generating musical tones are disclosed. In a first keyboard instrument, speakers are mounted near a keyboard, and are arranged upright to be directed to the keyboard on the front side, thereby allowing a performer to clearly grasp the sound quality of performance tones. In a second keyboard instrument, which comprises a Helmholtz resonator consisting of a resonance port and a cabinet, an electro-acoustic transducer mounted on the outer surface of the cabinet and a driver for driving the transducer so as to cancel an air counteraction from the resonator, the size of a sound system is reduced, and the frequency characteristics, especially the low-frequency reproduction characteristics of the sound system are improved.

Musical instrument incorporating a Helmholtz resonator

A musical tone control mechanism for an electronic musical instrument in which a musical tone adjustment rotary body having a rotating shaft extending along the longitudinal direction of a keyboard is provided, the rotary body is divided into a plurality of parts, and an operation position of the rotary body is movable along the longitudinal direction of the keyboard, or a means for selecting an adjustment function of the rotary body is arranged. The musical tone control mechanism further includes an operation amount detector for detecting an operation amount of the rotary body as a pivot amount of a pivot shaft body of the operation amount detector, cylindrical intermediate members fitted to both ends of the rotary body for connecting the pivot shaft body to the rotary body, and bearings having bearing holes for pivotally receiving the intermediate members.

Growing community of inventors

Hamamatsu, Japan

Toshiyuki Suzuki