Abstract: A dual vertical spindle turning machine for simultaneously machining workpieces chucked on the respective spindles having a horizontally movable dual tool assembly including independent side-by-side tool slides, and independent drive motors for simultaneously moving the tool slides along a horizontal slideway of a vertically movable main slide. The tool slides have clearance therebetween to enable independent adjustment of either one or both of the tools by incremental energization of either one or both of the tool slide drive motors.

Abstract: A cup-shaped wheel having an abrasive rim is employed to grind the teeth of a circular saw to an improved contour. Only point or edge contact takes place between the abrasive rim and the tooth. This technique is preferably utilized in conjunction with triple-chip type circular saws of the sort used to cut metals such as steel. The contour imparted to the cutting surface of the tooth comprises a section of an elliptical cylinder and exhibits improved steel cutting characteristics when compared to prior art multi-faceted saw teeth. Since only edge contact takes place between the abrasive rim and the tooth, the wheel is essentially self-dressing.

Abstract: A cup-shaped wheel having an abrasive rim is employed to grind the teeth of a circular saw to an improved contour. Only point or edge contact takes place between the abrasive rim and the tooth. This technique is preferably utilized in conjunction with triple-chip type circular saws of the sort used to cut metals such as steel. The contour imparted to the cutting surface of the tooth comprises a section of an elliptical cylinder and exhibits improved steel cutting characteristics when compared to prior art multi-faceted saw teeth. Since only edge contact takes place between the abrasive rim and the tooth, the wheel is essentially self-dressing.

Abstract: A circular saw includes a plurality of teeth having an improved metal breaking geometry. The saw is especially adapted to cut hard, brittle materials such as steel bars and the like. The saw teeth are generated by a cup shaped grinding wheel having a grinding face on its inside surface. By bringing the rotating inner surface of the grinding wheel into contact with each tooth, it is possible to produce a working surface on each tooth which exhibits improved metal breaking and self-cleaning characteristics. The working surface thus generated is characterized by the fact that all points on the working surface which lie in the same given plane perpendicualr to the axis of rotation of the grinding wheel are equally distant from any given point on that axis. The working surface is preferably a section of a cylinder or cone, but may exhibit irregularities or discontinuities for special applications.

Abstract: The bed includes a deck having a plurality of openings and side walls defining a trough with the deck. A plenum below the deck supplies air through the openings for fluidizing material in the trough, the openings being arranged to direct air in a manner to establish a predetermined flow pattern for circulating and mixing the material. In one form hereof, the flow direction is transversely of the bed to provide a circular mixing action. In another form, the openings are configured to provide both transverse and horizontal components of flow whereby the material is circulated as it moves downstream through the trough.

Abstract: A circular saw includes a plurality of teeth having an improved metal breaking geometry. The saw is especially adapted to cut hard, brittle materials such as steel bars and the like. The saw teeth are generated by a cup shaped grinding wheel having a grinding face on its inside surface. By bringing the rotating inner surface of the grinding wheel into contact with each tooth, it is possible to produce a working surface on each tooth which exhibits improved metal breaking and self-cleaning characteristics. The working surface thus generated is characterized by the fact that all points on the working surface which lie in the same given plane perpendicular to the axis of rotation of the grinding wheel are equally distant from any given point on that axis. The working surface is preferably a section of a cylinder or cone, but may exhibit irregularities or discontinuities for special applications.

Abstract: An air conveyor is disclosed for conveying disc or cup shaped articles. The air conveyor includes a conveying surface comprising a deck plate having propulsion slots extending therethrough for issuing propulsion air jets along the conveyor surface for conveying the articles. The air conveyor is provided with one or more spur or branch conveyor lines which lead from the main conveyor line to subsequent operating stations without requiring any moving parts to carry out the transferring functions.

Abstract: Disclosed is an air conveyor comprised of a deck having multiple openings and an underlying plenum containing air under pressure. The air from the plenum issues through the openings as jets to lift articles and advance them along a predetermined path spaced above the deck. To stop the articles, a second plenum is disposed within the first mentioned plenum and in communication with the openings through the conveyor deck at a location at which the article is to be stopped. A normally open valve provides communication between the first and second plenums whereby air under pressure in the first plenum passes into the second plenum and out through the openings in the conveyor deck for lifting and advancing the articles on the conveyor similarly as accomplished by the air issuing through the other openings in direct communication with the first plenum. A normally closed second valve commmunicates between a vacuum pressure source and the second plenum.

Abstract: An air conveyor is disclosed including a conveyor path defined by a perforated deck plate which issues air jets for moving articles along the conveyor. A guide system constrains the article for movement along the path under the influence of the air jets. The guide member further cooperates with the conveyed article to conserve propelling air.