Tsuneo Horino

On an Experiment of a Falling Ball Viscometer for Opaque Solution

A falling ball viscometer which can be used availably for viscous and particularly opaque solution as well has been tested.Two several turns coils independent on each other are set up instead of visible marks round the viscometer tube filled with solution of unknown viscosity. The coils form respectively electric oscilator circuits of different radio frequencies. Falling down a small metal ball in the solution, the inetant when it passes through the coil is to be detected by means of measuring or watching the voltage of heterodyne beat produced by two electric oscilations, of which frequencies deviate alternately by passing of the metal ball, and out-put voltage in question dips consequently owing to the band pass filter. Some considerations for suitable choice of every part and its dimension, namely diameters of ball and coils, frequencies applied etc., which effects to sensitivity and stability, are also given.Result obtained shows that the system is applicable effectively for measuring viscosity of various kinds of solution, for example, dull viscous solution (contains Titanium dioxide), pastes of pigment dyestuff, printing inks, paints, and so on.

Frequency Dependency of the Sohd Vlscoslty of Textlle Materlals

研究目的予て自由振動法によつて繊維材料の固体粘性に関する研究を行って来たか、固体粘性係数は負荷の繰返し周波によつて著しく変化するから、周波数の広い範囲で測定を行う必要を認め.今回はストレツチパイノロメータによつて50～500cpsの範囲において周波数の影響を調へた。研究結果生糸覧木綿、レーヨンビスース、エストロン、ビユロン、アミランの各糸について、周波数50～500c.psの囲で、弾性係数、固体粘性係数を測定し、これ等係数と緩和時聞及ひQ-1-値か周波数によって変化する有を明かにした。