Matsushita Electric Industrial Co., Ltd.

Masaya Nakajima

Takeji Kimura

Ryoichi Wada

Masahiko Tsunoo

Katumi Tabuchi

Katsumi Fujisaki

Yuichi Kaname

Katsumi Tabuchi

An electronic musical instrument has a plurality of tone selectors which select musical tones; a waveshape calculator which calculates a waveshape represented by amplitudes at two or more than two sampled points of one period of the selected tone and which is operative whenever the tone selectors are actuated; a plurality of waveshape memories which temporarily memorize the calculated waveshapes; clock signal generator which generates clock signals with high frequencies corresponding to pitches of depressed keyswitches of the musical instrument and which is operative whenever the keyswitches are depressed; a reading circuit which repetitively and successively reads out the memorized waveshape amplitudes by the clock signal generated by the clock signal generator; and a converter which converts the waveshape amplitudes read out by the reading circuit to a musical tone, wherein a musical tone is generated by repetitively reading out the temporarily memorized musical waveshape.

Electronic music instrument

In a telemeter system using a measuring probe for radiating a sound pulse signal the pulse spacing of which corresponds to information to be measured such as temperature or salinity of various depths in the ocean water, in order to prevent the echo noise signal there is provided an improved receiving system which comprises a one-bit delay circuit, a pair of integrating circuits, a pulse generator and a gate. One of the integrating circuits is controlled by the signal as received and the other is controlled by a one-bit delayed signal derived from the received signal. The pulse generator generates a pulse signal having a predetermined time duration at a predetermined level of the output from the integrating circuit, and that pulse drives the gate, so as to eliminate the echo unexpectedly received during the pulse spacing.

Receiving system of telemetering signal

An expendable oceanography probe has a hollow cylindrical housing, a front end element in the form of a weight fitted into the lower end of the cylindrical housing, a sensor, such as a thermistor, mounted on the external surface of the front end element for detecting information relating to the water to be tested, an oscillating circuit the electrical signals of which are changed according to the signal from the thermistor, an electroacoustical disk transducer combined with the oscillating circuit for radiating a sound signal into the water corresponding to the detected temperature of the water, a transducer holder fitted on the upper end of the cylindrical housing and a rear end disk plate on the transducer holder. A center axle, a cylindrical side wall and an end surface of the transducer holder form a cavity for radiating the sound signal. The transducer has a center hole, and it is mounted on the external of the transducer holder on the center axle and is held thereon by the rear end disk plate.

Expendable oceanography probe

Growing community of inventors

Neyagawa, Japan

Masaya Nakajima