| 摘要 |
A support (2) in which at least one rocker (3) is swivellably mounted is mounted on a base plate (1) to be held in a centrifuge. The said rocker (3) is provided with receptacles (4) for laboratory glass devices (5) and is supported on the leg of the rocker by a helical spring (7), which leg, as a result of displacement of the centre of gravity, is the heavier leg (3b) so that the lighter leg (3a) is located in the lower limit position. Electrical contacts (9) for a switching device of the centrifuge motor are associated with the two ends of the rocker. At a sufficiently high speed of revolution of the centrifuge, the heavier leg (3) overcomes the spring force as a result of the centrifugal force and moves into the contact position which switches off the motor. As a result of the subsequent dropping off of the centrifugal force, the spring presses the rocker back into the opposite contact position which switches on the motor again. <IMAGE>
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