Abstract: A quick release, high torque coupling for interconnecting the bit and drive member in a mine roof drill has axial-locking and torque-transmitting structure integral with the drill members. A plug on the drive member is adapted to be releasably received within a mating socket in the bit and has an axial-locking segment on its outermost end complementally configured with respect to an acircular constriction in the socket to permit insertion of the axial-locking segment into the socket beyond the constriction. A torque transmitting segment on the plug cooperates with the constriction to limit relative rotation of the bit and drive member between oppositely directed torque-transmitting positions. In one of the torque-transmitting positions, the constriction and axial-locking segment are misaligned such that the plug is restrained against axial retraction from the socket.

Abstract: Means for stripping residual yarn from spent spinning tubes effectively, and while protecting the physical condition of the spinning tubes as they are handled for stripping, is provided by combining means for aligning a spinning tube axially for stripping with means for applying a pair of stripping blades oppositely and transversely to the body of an aligned spinning tube adjacent the base thereof, and means acting at the tip of an aligned spinning tube for pressing the same axially between the applied stripping blades, while additionally arranging means for relieving the stripping blade application whenever the pressing means is resisted by a stripping force sufficient to threaten spinning tube damage.