Abstract: The device for displacing a platform includes two carriages driven, simultaneously or separately, on guiding rails oriented along an axis X. The two carriages carry a platform mounting slides engaged with slideways on the carriages. At least one of the slides of the platform carriage and at least one of the slideways of the carriage is oriented at an angle other than 90° relative to an axis X. The displacement along any direction of a plane comprised of the axes X and Z of a tool holder spindle or work piece spindle mounted on the platform can be obtained only by the relative or simultaneous moving of the two carriages on the guiding rails.

Abstract: An automatic lathe comprising a workpiece spindle, a compound slide embodying a longitudinal slide and a cross-slide, two primary cam disks seated on a primary control shaft, and transmission levers individually associated with said primary cam disks. The longitudinal slide and said cross-slide each are controlled by said primary cam disks through the agency of the individually associated transmission levers. At least two lathe tool supports are arranged adjacent one another at the compound slide. A control mechanism is provided which can be switched-on during a portion of each work cycle of the automatic lathe for carrying out a thread chasing operation by means of a thread chasing tool clamped in one of the lathe tool supports. The control mechanism embodies an auxiliary control shaft which is or can be placed in driving connection with the workpiece spindle and two auxiliary control cam disks fixedly seated upon said auxiliary control shaft.