Abstract: A workpiece spindle for a magnetic-shoe external cylindrical grinding machine a spindle for rotating a ring-shaped workpiece, a holding device for holding the ring-shaped workpiece and a hydraulic magnetic core lifting device coupled to the spindle and to the holding device to vary an axial spacing between the holding device and the spindle. The holding device has a magnetic shoe for clamping the ring-shaped workpiece in the holding device.

Abstract: A coil for conducting examination of a patient in a nuclear magnetic resonance apparatus has a flat surface coil for spectroscopic in vivo examination of the patient and a calibration substance disposed within the coil. The coil is placed in the patient during examination, and the calibration subject supplies a nuclear magnetic resonance signal measurable by the coil as a reference.

Abstract: Disclosed herein is a coil spring feeding apparatus comprising a plurality of elongated magazines supported by a frame in parallel relation to each other and each including a bottom and a discharge end, a conveyor assembly extending transversely of and adjacent to the discharge ends of the magazines for receiving the endmost coil springs from the magazines and for transporting the coil springs transversely of and away from the magazine ends, which conveyor includes a pair of spaced, parallel endless belts each having a top surface and supported for intermittent travel transversely of the magazine ends, an elongated platform having and upper surface, a cylinder for locating the platform, during belt movements, in a lower position with the platform upper surface beneath the belt top surfaces, and for locating the platform between belt movements, in a raised position, and a transfer device for withdrawing the endmost coil springs from the magazines and for transferring the endmost coil springs onto the conveyor

Abstract: Disclosed herein is a coil spring feeding apparatus comprising a coil spring magazine supported by a frame, having a discharge end, and adapted to contain a plurality of coil springs, a chain conveyor for transporting the coil springs in the magazine toward the discharge end, a belt conveyor extending transversely of the magazine adjacent the discharge end, structure for transferring the end coil spring in the magazine to the conveyor and including a magnet adapted for magnetically attracting and releasably holding the end coil spring and movable, across the conveyor, between a retracted position on the side of the conveyor remote from the magazine discharge end and an advanced position located adjacent to the magazine discharge end in position for magnetically attracting and releasably holding the end coil spring in the magazine, a cylinder for displacing the magnet between advanced and retracted positions, and a stripper located adjacent to the conveyor along the side thereof remote from the magazine discha