Victor Company of Japan, Limited

Mitsubishi Mining and Cement Co. Ltd.

Katsuhiro Onuki

Yukinobu Ishigaki

Kiyoaki Suzuki

Hidetsugu Suzuki

Yoshiaki Fukuda

Fumio Kawabata

Isami Nomoto

Takeshi Sato

A scrambler system comprises in a transmitter part thereof as oscillator circuit for generating a local oscillation signal, a frequency dividing circuit for obtaining a frequency divided signal by frequency-dividing the local oscillation signal by 1/N, a triangular wave signal generating circuit for converting the frequency divided signal into a triangular wave signal and for controlling the oscillation frequency of the oscillator circuit by the triangular wave signal, a multiplying circuit for obtaining a frequency converted audio signal by multiplying the local oscillation signal with an input audio signal which is to be scrambled, a pilot signal generating circuit for generating from the frequency divided signal a pilot signal having a single frequency, and an adding circuit for obtaining a scrambled signal for transmission by adding the pilot signal and the frequency converted audio signal. A key is used for de-scrambling the scrambled signal in a receiver part of the scrambler system.

Scrambler system

A loudspeaker diaphragm comprising a molded, sintered ceramic body is described. The body is made of ceramic crystalline particles whose maximum size is below 1/5 time a thickness of the body which is in the form of a dome or cone. The dome- or cone-shaped diaphragm may have a flange along an opening side thereof in order to prevent deformation as may occur during firing.

Loudspeaker diaphragm made of a molded, sintered ceramic body

Growing community of inventors

Tokyo, Japan

Katsuhiro Onuki