Abstract: A conveyor system for use with rotary screw conveyors located side by side has a mechanical arrangement allowing individually adjusting the speed of each conveyor. One end of each conveyor has driven teeth disposed in a circle and coaxial with the rotation axis of the conveyor. Each conveyor is rotated by a circular disk rotating about an axis normal to the axis of the conveyor and provided with driving teeth disposed in a circle on the disk and positioned to mesh with the driven teeth of the conveyor. The driving teeth of each disk are individually mounted so that they may be moved between a working position where they mesh with the companion conveyor driven teeth and a non-working position where they are retracted wholly within the disk. By thus retracting some of the disk teeth, the rotation of the companion conveyor may be step-like, thus controlling its conveying capacity.

Abstract: A finish plate assembly for giving a finished appearance to a fire-protection sprinkler head exposed through an opening in a ceiling wherein the installed height and angular orientation of the ceiling with respect to the sprinkler head is variable, thereby determining a range of variation of relative distances normal to the ceiling between adjacent portions of the opening and the sprinkler head, the assembly including a finish plate having a planar contact surface for engagement with the ceiling outside the periphery of the opening and having two or more arms each with a radially-extending segment, and further including a receptor fixed to the sprinkler head, the receptor including openings for receiving the arm segments when the finish plate and arms are moved upward toward the fixed receptor, two or more circumferentially-extensive, resilient ramp elements for attachment around the sprinkler head, and a central opening for receiving the sprinkler head, and the resiliency of the ramp elements being selected