Matsushita Electric Industrial Co., Ltd.

Koichi Saito

Makoto Kato

Masahiko Hashimoto

Masayoshi Miura

Nobuaki Furuya

Takehiko Suginouchi

Gen Oda

Minoru Kimura

Kimikatsu Sato

Shuko Kanematsu

An ultrasonic distance measure includes: transmitting and receiving ultrasonic transducers with changeable resonant/resonance frequencies; a driving section generating a frequency-modulated drive signal to drive the transducer and transmit an ultrasonic wave; a transmitting control voltage generating section for generating a control voltage to change the resonant/resonance frequency of The transducer and applying it to the transducer in transmitting the ultrasonic wave; a receiving control voltage generating section for generating a control voltage to change the resonant/resonance frequency of the transducer and applying it to the transducer when a controllable amount of time delay has passed since The drive signal was generated; and a receiving section for sensing the intensity of a signal received as the ultrasonic wave at the transducer.

Ultrasonic distance measure

A microwave powered gas laser apparatus contains a gas medium, and a device for exciting the gas medium to a high energy state by a plurality of microwaves. Directions of vibrations of electric fields of the microwaves are different from each other. There may be provided a device for making the microwaves into standing waves respectively, and a device for exposing the gas medium to antinodes of electric fields of the standing waves.

Microwave powered gas laser apparatus

An ink-jet recording apparatus comprising an ink-discharging opening coupled to an ink chamber for discharging ink therefrom toward a recording sheet. The ink-discharging opening is formed at a center and bottom of a concave portion formed in a thin plate made of an insulating material. A first electrode is provided on one surface of the thin plate and around the concave portion and a second electrode is provided on the other surface of the thin plate and at the vicinity of the ink-discharging opening, the first and second electrodes being electrically coupled to an ink-discharging control signal source. This arrangement can omit an air supply system to simplify the structure of the recording apparatus.

Ink-jet recording apparatus

Growing community of inventors

Yokohama, Japan

Koichi Saito