Abstract: Apparatus for the loss-free winding of a continuously supplied thread to winding packages at a high winding speed, in which the thread is wound with transverse motion with loss-free transfer of the thread from a nearly wound bobbin to an empty bobbin on a chuck of a bobbin revolver. Loss-free thread transfer is attained by an auxiliary thread guide with a guide edge slanted laterally and outwardly relative to the traverse triangle and terminating in a thread catching eye. The auxiliary thread guide catches the thread in the traverse triangle when moved into the plane thereof, after which the guide is pivoted outwardly and downwardly into a zone where the thread is caught by thread catching means on the empty bobbin or its chuck. The downwardly extending thread loop runs over a mandrel having a bi-conical midportion and a radial arm shiftable laterally along one conical surface in the axial direction of the mandrel.

Abstract: Azo pigments having 2,6-dihydroxy-4-methyl-3-cyanopyridine or 2,6-dihydroxy-4-methyl-3-carbamolpyridine as coupling component and a heterocyclic substituted aniline as diazo component. The pigments have the formula ##SPC1##In whichR is cyano or carbamoyl;A is an unsubstituted or substituted benzene ring; andB is a heterocyclic ring which is fused with the benzene ring and which contains at least one --NH-- and --CO-- or at least one --NH--CO-- group. Compounds of this formula as pigments are eminently suitable for coloring printing inks, surface coatings and resins.