Wiredrawing Machines, Double Block

The double block, an accumulation-type system, consists of a second block mounted above the drawing block and on the same spindle, the drawing block being keyed to the spindle while the upper block is free to rotate on the spindle in either direction. The accumulated wire is stored on both blocks. A pulley transfers wire from the lower to the upper block operates in a similar way to the pulley on the overhead takeoff machine.