Abstract: An automatic-locking mechanical drive construction for raising and lowering a window covering, including a fixed cylindrical shaft, a rotary drive member mounted to rotate about an axis with respect to the shaft, and a rotary driven member turnable with respect to the shaft and about the axis of the drive member. The drive and driven members have pairs of facing, abuttable walls effecting a two-directional, lost-motion rotary driving connection between the members, and a helical coil spring is disposed on the shaft, so as to frictionally seize it, and selectively lock thereon. The spring has a radially-projecting shoulder intermediate its ends. Spaced-apart shoulders on the driven member are individually engageable with the projecting shoulder on the spring whereby the spring normally prevents turning of the driven member in either of opposite directions.

Abstract: The present invention relates generally to a new carrier for holding and transporting semiconductor products, and more specifically, to a versatile product carrier for holding and transporting a plurality of products, such as, ceramic substrates, green sheets, wafers, glass and/or metal masks, rigid or floppy disks, to name a few. The modular or versatile product carrier usually has two symmetrical cross-bars and two symmetrical end plates. The two cross-bars securely link into the end plates thereby forming the versatile product carrier of this invention. A cover that can be used to cover the versatile product carrier is also disclosed.

Abstract: The present invention relates generally to a new carrier for holding and transporting semiconductor products, and more specifically, to a versatile product carrier for holding and transporting a plurality of products, such as, ceramic substrates, green sheets, wafers, glass and/or metal masks, rigid or floppy disks, to name a few. The modular or versatile product carrier usually has two symmetrical cross-bars and two symmetrical end plates. The two cross-bars securely link into the end plates thereby forming the versatile product carrier of this invention. A cover that can be used to cover the versatile product carrier is also disclosed.