| 摘要 |
1,124,517. Magnetic stirrers. CESKOSLOVENSKA AKADEMIE VED. 2 June, 1966 [3 June, 1965], No. 24580/66. Heading B1C. [Also in Division G1] A cell 2, Fig. 1, for making optical investigations on a liquid flowing therethrough in a direction approximately parallel to the light beam and comprising an elongated chamber 1 closed at each end by a window 3, 3<SP>1</SP>, and having inlet and outlet channels 5, 6, at opposite ends of the cell is provided with a ball 8 which is normally accommodated in a recess 9 so as to be outside of the path of the light beam but is movable by external means to stir the cell contents. The ball 8 may be of ferromagnetic material so that it may be moved by rocking a shaft 14 carrying an electromagnet or permanent magnet 11 whose polepieces closely embrace the sides of the cell which is made thinner in their vicinity. Alternatively a stationary electromagnet may be used and its pole-pieces either shaped or so placed that the ball 8 is moved against gravity when the current is switched on, the ball 8 returning under gravity due to the inclination of the cell. In further forms the cell is rocked or otherwise moved to provide movement of the ball. |
