Kabushiki Kaisha Kawai Gakki Seisakusho

Satoru Hayashi

Masakazu Matsumoto

Takayuki Goshima

Kenkichi Kaneko

Shinji Tagaki

Kensaku Hakamada

Kensaku Hakamata

Katsuyuki Tanaka

Takeshi Hattori

An output circuit of a stereo type audio device includes a switch state detection switch which responds to an open state of a normally closed internal switch of an output jack of a first channel to separate a stereo signal source from the first and a second channels of the stereo device and connect a monoral signal source to the second channel.

Output circuit of audio device

A portable keyboard-type musical instrument includes detachable end support frames which can be attached to the musical instrument in either an extended supporting position or a retracted storage position, a support for the keyboard of the instrument being rigidly supported by members which are in turn rigidly attached to the frame of the musical instrument.

Portable keyboard-type musical instrument

A pickup for an electric string type instrument comprising an elongated piezo-electric member formed by mixing a high molecular material with piezo-electric ceramic powder and a vulcanizing or cross-linking agent and then vulcanizing or cross-linking the mixture. In order to complete the pickup a pair of electrodes are mounted on the elongated member and the member is then subjected to a polarization treatment. The piezo-electric member can be formed as a flat belt-shaped member with the electrodes mounted on both surfaces thereof or it can be formed as a cylinder in which one of the electrodes extends axially in the piezo-electric member and the other electrode is mounted on the outer periphery of the piezo-electric member. A plurality of the pickups can be joined in parallel relation within an elastic support and the latter can be mounted between the strings and the frame of the string instrument through the intermediary of a bridge member.

Pickup apparatus for an electric string type instrument

Growing community of inventors

Toyoda, Japan

Satoru Hayashi