Abstract: A protective boot for preventing contamination of the oil in a hydraulic piston-cylinder assembly consists of an elongate flexible sleeve having a first end removably securable to the head of the cylinder and a second end removably securable to the distal end of the piston rod. The boot is split along a longitudinal seam which can be closed by a zipper, a hook and loop type fastening strip, or other suitable attachment devices. Several flexible metal or plastic stays encircle the sleeve at spaced locations to prevent the sleeve from contacting the piston rod. Each stay is split to accommodate the seam.

Abstract: A can twist is provided for changing the orientation of cans in a conveying system with each can having a leading side and a trailing side as it passes through the can twist. The guide rails for the open and closed ends of the cans are located so that only the trailing side of each can contacts the guide rails. Such contact is, at any one time, substantially a point contact of the open end and its guide rail and substantially a point contact of the closed end and its guide rail. This is accomplished by providing a plurality of frame members and guide rails with each frame member having two short sides and two long sides and securing the guide rails for the open end and the closed end at a location spaced from the center of each short side.

Abstract: A signal-processing system, particularly adapted to digitally process analog signals, and including computation apparatus which carries out operations on the signals, also includes a control memory with storage locations addressable in predetermined sequences and an operand memory with storage locations addressable in variable sequences. The control memory contains control information which controls the operations of the computation apparatus and the operand memory contains operand information which is operated upon by the computation apparatus with the signals which are processed. The variable sequences in which the storage locations in the operand memory are addressed are in part determined by information in the control memory. The computation apparatus includes a multiplier, an adder, and a delay memory which is used in providing variable delays in signals during processing.