Abstract: An optical pickup can be inverted accurately and smoothly regardless of the skew operation of the optical pickup. The present invention is directed to a disc player in which a single optical pickup (37) is inverted in an opposing relation to both surfaces of a disc (D) at the same time when it is elevated so that both surfaces of the disc (D) can be reproduced. As an inverting mechanism (79) of the optical pickup (37), an inverting gear (80) is attached to a supporting shaft (53) on which the optical pickup (37) is supported. On the other hand, an inverting rack (81) which is meshed with the inverting gear (80) so as to invert the optical pickup (37) is attached through a supporting frame (82) to a lower chassis (4) which is skewed.

Abstract: Dihydropyridine compounds of the formula ##STR1## in which R.sup.1 is a nitrophenyl group and R.sup.2, R.sup.3, and R.sup.4 are lower alkyl groups or pharmaceutically acceptable salts thereof are useful for improving venous extensibility and suppressing cardiac hypertrophy.

Abstract: An electronically controlled sample warper capable of warping a plurality of warp yarns simultaneously. In the warper, a plurality of warp yearns can be concurrently wound on a warping drum with omitting a yarn exchanging step to eliminate any time loss for the yarn exchange, thus reducing the warping period of time.

Abstract: An apparatus for reproducing signals recorded on a selected one of first and second discs of different diameters, such as, a relatively large diameter video disc and a relatively small diameter compact disc, has a disc-transporting tray mounted for substantially horizontal movement between a first or operative position within a housing and a second or disc-inserting and withdrawing position in which the tray projects substantially forwardly from the housing through an opening at the front of the latter, the tray having first and second disc mounting portions dimensioned for receiving and holding the relatively large and small diameter discs, respectively, and the second or relatively small-diameter disc mounting portion being disposed at a front part of the tray and substantially contained within the confines of the first or large-diameter disc mounting portion for minimizing the required size of the tray, and hence the overall size of the apparatus.

Abstract: The control circuit for use with an electromagnetic coupling apparatus comprises a timer started when a power source switch is closed, an oscillator started by the switch and stopped by the timer, and a drive circuit which intermittently passes current through an exciting coil of the electromagnetic coupling apparatus in accordance with the oscillation output of the oscillator and continuously passes current through the exciting coil when the oscillation output is stopped.