Abstract: A spindle lock-up device for detachably locking a rotary spindle having a tool holder at its end to a non-rotatable support, such as the ram of a vertical boring machine, so that the spindle tool holder also may be used as a fixed tool holder for the ram, the device having a first spiroid gear member fixed to the ram, a second spiroid gear member surrounded by the first gear member and fixed to the spindle, and a third spiroid gear member surrounding said spindle and mounted for axial movement from a retracted to an extended position, the third gear member simultaneously engaging the first and second gear members when in the extended position to lock the spindle against rotation relative to the ram, the third gear member being moved to the extended position by a displaceable piston.

Abstract: A high speed gill box having an upper head and lower head each of which contains a compliment of individual unconnected faller bars constrained to move in a smooth closed loop path. Each head is constructed to engage the associated faller bars outside of the pinned area to guide the faller bars through the closed loop path. Cam tracks are provided outside of the faller bar guide paths for engaging a crank arm extending away from the main pinned portion of each faller bar to provide proper orientation as the faller bar moves along its fixed path. Sprocket drives are provided in each head for engaging some of the faller bars and pushing them along the closed loop path. The pushed faller bars, as they exit the drive sprockets, push the faller bars ahead of them through the closed loop path. The drive sprockets are mounted at one end of the drafting zone while idler sprockets are mounted at the other end of the drafting zone to facilitate movement of the faller bars from the drafting zone.