Abstract: A fluid strainer and flow corrector for use with a fluid flow measurement device, such as a turbine-type flow meter, consists of a generally conical grid of ribs attached to an annular base flange. The base flange of the strainer/flow corrector fits into a groove formed on the inlet side of the housing of the flow meter and is held in place by means of a flexible snap-ring. The strainer/flow corrector is arranged with its apex upstream of the flange portion with respect to the direction of fluid flow through the inlet of the flow meter. The spacing between the ribs is chosen as to block the flow of debris which might be present in the fluid flowing through the flow meter. The spacing between the ribs is also chosen to provide a desired velocity profile to the fluid. The strainer/flow corrector may be easily removed or replaced without disconnecting the flow meter from its associated pipework.

Abstract: This linear feedback shift register (LFSR) circuit having systolic architecture comprises N cells (C1 to CN) each of which includes an upstream register (e.g. RGE1l ), two operators (e.g. OP1 and OC1l ), and a downstream register (e.g. RGS1). The upstream and downstream registers of each cell are serial shift registers, and their total content is equal to the total number of bits constituting each digital sample processed by the circuit.

Abstract: A graphic machine or plotter comprising a feed roll (30) for continuously supplying a print medium such as paper (20), driving means (24) for driving the paper supplied by the feed roll to produce a drawing on the paper, and a take-up roll (40) for receiving the paper after the drawing is produced. The feed roll (30) and the take-up roll (40) are linked together in such a way that the rotation of the feed roll (30) in a forward direction for which the paper is payed out from the feed roll drives the take-up roll (40) to wind up the paper but the rotation of the take-up roll (40) in the reverse direction does not drive the feed roll (30).

Abstract: A fluid flow profile regulating apparatus coaxial to a conduit carrying a fluid regulates fluid flow profile by smoothing out irregularities in fluid flow velocity transverse to the direction of flow. In one embodiment of the invention, the apparatus comprises a cylindrical chamber having a radius greater than that of the conduit and an internal set of ribs parallel to the longitudinal axis of the chamber. Each rib has a radial length less than the radius of the chamber to establish a cylindrical passage in the chamber having a radius less than that of the conduit open for uninterrupted fluid flow along the axis of the chamber. In another embodiment, although the radius of the chamber is not necessarily greater than that of the conduit, longitudinally displaced sets of internal ribs are angularly displaced with respect to each other. The longitudinally spaced, angularly offset ribs tend to cancel turbulence in the fluid developed between the ribs of the first set.