Abstract: An improved combination mill-lathe type machine tool including a work piece carrier carrying an elongate work piece on a turning axis; an elongate rotatable cutting tool carrier with an inner end and rotatably carrying a cutting tool on a rotating axis; and, an adjustable device to move the cutting tool carrier and tool into working position relative to the work piece and to feed the tool longitudinally thereof; said device includes a compound table with a plate movable on a plane along axes parallel with and normal to said turning axis, a first L-shaped pivot mount with a base pivotally mounted on the plate on a first swivel axis normal to the plate and with a leg spaced radially from and parallel with said first swivel axis, a second L-shaped pivot mount with a first arm parallel with and rotatably carried by said leg on a second swivel axis that is normal to and intersects the first swivel axis, and, a second arm carrying the cutting tool carrier with its inner end disposed toward the point of intersection

Abstract: A ball and socket-type Universal joint including an elongate female part with an elongate, central, polygonal socket opening entering one end and defining a flat axially disposed bottom and a plurality of elongate circumferentially spaced, radially inwardly disposed, longitudinally straight and laterally convex flats; an elongate male part with a shank and a semi-spherical polygonal head at one end of the shank and having a plurality of elongate circumferentially spaced, radially outwardly disposed, longitudinally extending, laterally straight and convexly curved facets. The head of the male part is engaged in the socket opening of the female part with opposing points on the flats and facets, along the central portions thereof, in circumferential driving and longitudinal sliding bearing engagement with each other. The other end of the female part is connected with an end of one elongate rotatable work piece, and the other end of the male part is connected with an end of another elongate work piece.