Identical unbalanced masses m are secured to disks a in such a way that the resultant of the unbalanced forces acts along axis x-x or y-y or an axis perpendicular to the plane of the drawing, or so that a torque is produced with respect to one of these axes. Rotation is transmitted from shaft 1 to shafts 2 and 3 through gears 7, 8, 9 and 10, and to shafts 4 and 5 through bevel gears 11 and 12. When shaft 1 rotates, a vibrational load is applied to frame 6 of the vibrator and to the structure which is being tested.
$2961$CxG,VM$