Abstract: A device for controlling in sequence or at the same time the feed of metal bars into a suitable guide equipment for supplying the bars to an automatic multi-spindle lathe is described.In order to connect the main control or drive to the bar feeding apparatus, the device includes a clutch, the coupling and decoupling of the clutch being caused by the rotation of the guide equipment. The portion of the clutch which is connected to the drive can rock around the axis of its support on the fixed frame during the coupling operation, and a return spring is provided to return rockable portion back to its starting position ready for the next coupling operation.

Abstract: A bar lifting equipment in automatic bar loading devices for a machine tool comprises a plurality of arms driven to rotate in a vertical plane parallel to said bars for displacing their end, which end is provided with means for grasping said bars, from a first lower position in which one bar is drawn out a supply source to a second upper position where a rotating comb device is provided. Said comb device being suitable for drawing out said bar and dropping it by gravity onto a channel-shaped jaw, said jaw being suitable for introducing said bar into the machine tool.

Abstract: A device for withdrawing from a bar pusher and thereafter unloading the crop-ends of metal bars in a bar feeding apparatus for a multi-spindle lathe, the device being suitable also for placing a new bar on the bar pusher, is disclosed; the device of the invention is comprised essentially of a pair of movable jaws which by a turning movement close onto the crop-end of a metal bar and lock the crop-end therebetween; the crop-end is the residual part of the lathe machining of the metal bar; thereafter the jaws accomplish a translation movement to detach the crop-end from a bar pusher which formerly caused the bar forwarding in the feeding apparatus of the lathe; the jaws thereafter open slowly dropping the crop-end in a proper unloading zone; finally the jaws close onto a new metal bar to be machined and, by a further translation movement in the direction opposite to the former one, perform the insertion of the new metal bar end into the bar pusher.

Abstract: A control device for feeding metal bars to guide equipment for feeding an automatic multiple-spindle lathe. The device consists of a series of drive shafts, each of which accounts for the feeding of a bar. The shafts are equal in number to the lathe spindles and are placed in a drum that rotates synchronously with the lathe spindle holding drum. Each of these shafts can be coupled with a drive element when a certain length of bar is to be fed. The coupling takes place through engaging and disengaging parts mounted between the shaft and the drive element. Each shaft controls at least one gear for feeding a bar, through a chain or the like provided with a bar-pusher, when the shaft is made to turn. The gear can be moved to make the device usable with lathes having different spindle center distances.

Abstract: A device is described which is meant to control the opening and closing of the metal bar sliding guides in a multiple-spindle lathe feeding equipment.Each sliding guide consists of two parts, a fixed one and a mobile one, and the device to open and close them is mainly made up of a locking pin integral with the fixed guide part, the releasing of which allows a mobile element to control the turning of a shaft with which the mobile guide part is integral.