Abstract: Cleaning compositions, having particular utility in cleaning aircraft, based on a synergistic combination of nonionic polyethoxylated surfactants. The inclusion of a fluoroaliphatic phosphate in the composition imparts resoilresistance to the cleaned surface.

Abstract: Circuitry providing a scanning threshold for a scanning apparatus in response to the output of a photomultiplier of the apparatus produced during a threshold determining scan of the field uses a first memory circuit to store a signal level indicative of the maximum light intensity sensed by the photomultiplier with a second memory circuit provided to store a signal level indicative of the minimum light intensity sensed. A threshold circuit connects with the stored signals to provide a threshold signal intermediate the two stored signal levels. An inhibiting circuit may be provided to prevent the second memory circuit from responding to signals below a predetermined level. Inhibiting circuitry and memory deletion circuitry are used to condition the memories prior to and immediately following a threshold determining scan.

Abstract: Precoated large-diameter monofilaments such as boron monofilaments are disclosed. The coating on the monofilaments comprises a crosslinkable resin composition that is partially crosslinked so that it does not flow when a prepreg tape in which the monofilaments are incorporated is subjected to a useful molding operation.