Abstract: An asymmetrical vibrator is provided, which is actuated by compressed air. The vibrator operates in a case, which has two bores disposed parallel on opposite sides of the casing. One of the bores is smaller than the second bore and the piston operating in the small bore is called the slow piston, since it is actuated with air to a relatively slow motion and the piston operating in the second larger bore is called the fast piston, since it is moves at a larger speed when driven directly by the compressed air. The asymmetric vibration motion can be employed to transport materials upwardly in factories and assembly stations. The air operated asymmetric vibrators need low maintenance and do not entail the spark dangers caused by the presence of electrical wiring for electrical drive motors.

Abstract: A vibratory conveyor drive is provided that is operatively connected to a vibratory conveyor tray for use in generating reciprocating movement in the tray so that a variety of goods may be transported along the tray. The conveyor drive includes a drive wheel having a radial slot formed in it. The drive wheel is supported for rotation about a first axis of rotation and is operatively connected to a source of rotational motive force, such as an electric motor. A transfer wheel is supported for rotation about a second axis of rotation, and is positioned in substantially parallel-spaced relation to the drive wheel. the transfer wheel includes a first shaft projecting outwardly from a first surface, with a drive-follower positioned on an end of the first shaft. The drive-follower is received within the radial slot of the drive wheel.

Abstract: A vibratory conveyor drive is provided that is operatively connected to a vibratory conveyor tray for use in generating reciprocating movement in the tray so that a variety of goods may be transported along the tray. The conveyor drive includes a drive wheel having a radial slot formed in it. The drive wheel is supported for rotation about a first axis of rotation and is operatively connected to a source of rotational motive force, such as an electric motor. A transfer wheel is supported for rotation about a second axis of rotation, and is positioned in substantially parallel-spaced relation to the drive wheel. The transfer wheel includes a first shaft projecting outwardly from a first surface, with a drive-follower positioned on an end of the first shaft. The drive-follower is received within the radial slot of the drive wheel. An axle projects outwardly from a second surface of the transfer wheel, and is positioned in coaxial relation with the second axis of rotation.

Abstract: A vibrator for transporting articles has a base, a sliding carriage having an article-carrying surface, a piston arrangement with two expansion chambers in the base for vibrating the carriage, and a pneumatic valve assembly operated by the piston arrangement. Preferably, two pistons are oppositely aligned on a common axis and bear outwardly against the carriage. The pneumatic valve assembly includes a pair of spaced cam rods and a crossbar extending between the cam rods at their midpoints. The cam rods are parallel to the axis of the pistons, slide in unison with the carriage, and cooperatively push the crossbar between opposite extreme positions. The crossbar switches the air flow directions for the power and exhaust strokes of each piston. Air flow to or from one of the expansion chambers is throttled such that the carriage is moved more forcefully in one direction than in the other. Articles on the article-carrying surface are incrementally displaced in the direction opposite to the more forceful stroke.