Abstract: This invention provides a simple and inexpensive vibrator. Upper and lower linked arms are used to hold equal weights attached at the ends of the arms. The arms are attached to collars which spin. A bent axle is used to cause displacement of the upper collar with a resultant shortening of the effective radius of rotation of one of the weights at a determined position in the circle of rotation. This shortening of the effective radius of rotation imparts a vibratory motion to the vibrator.

Abstract: The vibrator system of this invention provides conversion of rotary motion to an unidirectional motion and may be used to propel watervessels. The vibrator system involves a rotating vibrator unit which bears large and small rotating eccentric weights. A gear arrangement provides synchronized rotation of the weights which results in a net unidirectional force. In a second embodiment, two vibrator units are mounted on a single frame and are rotated in synchrony.

Abstract: A vibratory device which provides vibratory motions for screens, shakers, and vehicles which utilize such motions is described. Rotatory motion is imparted to a rotating frame which transmits to motion to an unbalanced weight assembly. Rotation of the unbalanced weight assembly generates vibratory forces in defined directions. The rotating frame imparts a gyroscopic effect which stabilizes the vibratory device in all directions other than those in which vibration is desired.

Abstract: A motivational generator which provides vibratory motions for screens, shakers, and vehicles which utilize such motions is described. In one embodiment rotatory motion is imparted to a spinning frame which transmits the motion to two unbalanced chevron-shaped vibratory devices via gears, belts, and pulleys. In another embodiment, the motion of the spinning frame is conveyed to unbalanced chevron-shaped vibratory devices directly through gears. In a third embodiment, the unbalanced chevron-shaped vibratory devices are rotated without rotation of the spinning frame. In the first two embodiments, the spinning frame imparts a gyroscopic effect which stabilizes the motivational generator against vibration in all directions other than the desired back-and-forth direction along the spin axis.

Abstract: The device for producing vibratory forces shown in the drawings comprises a pair of plates mounted on a structural frame. There are three rows of gears on each plate which are intermeshed so that all may be driven from a drive input to one of the gears in the central row. Drive means provide the input to the driven gear of each plate through one of the journals for mounting the plates on the frames. Weights are mounted eccentrically on each of the gears and are thus rotated synchronously between extreme outward and inward positions to produce, by centrifugal force, vibratory forces parallel to the planes of the plates. Means, operative through the other journals for pivotal mounting the plates, simultaneously and synchronously pivot the plates between aligned positions wherein the centrifugal forces are nullified and essentially no vibrations are produced and parallel positions wherein the vibratory forces are at maximum.