Abstract: A moving picture data recording/reproducing system. In recording operation, moving picture data of a first frame row including frames selected from frames of an input picture signal for every predetermined number of frames are coded in accordance with an intra-frame coding method in which coding is completed within each frame, while picture data of a second frame row including the other frames are coded by an inter-frame coding method assuring a high compression ratio. The coded data resulting from the inter-frame coding and the intra-frame coding are multiplexed by interleaving them in the order of the frame numbers, the multiplexed data being then recorded on a recording medium. In reproducing operation, the multiplexed data are read out for reproducing the moving picture signal or alternatively the intra-frame coded data of the first frame row are selectively read out for reproducing the moving picture signal.

Abstract: A butterfly valve comprising a valve body provided with a hard body seat having a cylindrical sealing surface, and a valve disc rotatable within the body and provided with a hard disc seat on the periphery thereof. The body seat and the disc seat are adapted to contact each other substantially over the entire circumference. The valve of this invention is capable of good sealing and is opened with a small driving force.

Abstract: Rotary valve comprising a rotatable stem having a valve disk fixed thereto and disposed within a valve case, a slidable tube and a rotatable tubular member each positioned coaxially with the stem and connected to the valve case, first screw-thread means for holding the stem and the slidable tube in screw-thread engagement with each other, and second screw-thread means for holding the slidable tube and the tubular member in screw-thread engagement with each other, the first screw-thread means having a larger lead angle than the second screw-thread means, so that the rotation of the tubular member rotates the stem of the valve disk.

Abstract: A butterfly valve apparatus comprising a rotating shaft, a valve stem movable by the rotating shaft through a coupling member and a valve plate fixed within a valve housing to the valve stem.

Abstract: A butterfly valve apparatus comprising a rotating shaft, a valve stem movable by the rotating shaft through a coupling member and a valve plate fixed within a valve housing to the valve stem.