Other

Larisa Ruvimovna Frenkel

Boris A Glagovsky

Alexandr Lazarevich Khait

Vladislav Sergeevich Lysanov

Leon Izrailevich Feldgun

Igor Borisovich Moskovenko

Garri Shmilevich Roitshtein

Zinovy Illich Kremen

Vera S Los

Yakov Abramovich Muzykant

Ljudmila Yakovlevna Slavina

Veniamin Alexandrovich Yashin

Anatoly Samoilovich Kamenkovich

Galina Alexandrovna Shashkina

An apparatus for measuring the magnetic content of non-metallic samples includes operating and reference sine wave oscillators of identical frequency, a mutual synchronization loop for said oscillators, and a phase meter connected to the oscillator outputs for measuring the phase shift between their oscillations, when a test sample is placed inside the inductance coil of the operating oscillator. The mutual synchronization loop includes a switchable resistive attenuator for varying the resistance of the mutual synchronization loop according to the magnetic content of the test sample, such that the phase shift between the oscillations of the oscillators, with any value of content within the specified measuring range, is not in excess of 30 deg.

Apparatus with inductive loop synchronized oscillators for measuring the

A method of testing wear-resistance of articles which comprises measuring the rate of propagation of ultrasonic oscillations in a reference article which has the lowest admissible wear resistance. The rate of propagation of ultrasonic oscillations in the articles being tested is compared with the rate in the reference article. The reference article is placed into a liquid in the suspended state and the articles being tested are placed into the same liquid. Those articles, which ascend to the surface, are rejected.

Method of testing wear resistance of articles on the basis of

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Saint-Petersburg, Russia

Larisa Ruvimovna Frenkel