DEVICE FOR MEASUREMENT OF HARDNESS OF INTERNAL SURFACES Russian patent published in 1995 - IPC

Abstract RU 2051367 C1

FIELD: testing equipment. SUBSTANCE: resonance elements of oscillatory system of electroacoustic converter is manufactured in the form of Archimedian spiral which makes it possible to diminish dimensions of electroacoustic converter and to simplify its design. EFFECT: diminished dimensions and simplified design of electroacoustic converter. 3 cl, 3 dwg, 1 tbl

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RU 2 051 367 C1

Authors

Chubukov A.A.

Rovenkov V.D.

Sabaev A.S.

Sergienko V.Ja.

Dates

1995-12-27—Published

1991-08-02—Filed