Abstract: A barrier system acts to gradually decelerate and arrest low-flying projectiles, such as RPGs, to reduce the likelihood of a fuze-detonating impact. The barrier system, which includes a frame-supported net and net suspension, preferably with energy absorbing characteristics, preferably is modular and portable so that similar barrier units can be arranged, and optionally joined together, to form a wider line of defense, such as a defensive perimeter around a potential target area.

Abstract: A bomb blast drapery is defined by a sheet of substantially resilient fabric having high burst strength and substantial fullness in width and length such as to project peripherally beyond a glass window in a wall opening of an associated building. The fabric sheet has a fullness in a width direction approximately 21/2 times the wall opening width and a length fullness ranging from 20" for a window height of approximately 10" up to approximately 380" for a window height of up to 190". The burst strength of the fabric sheet is approximately 110 lbs. and the weight thereof is substantially 4.2 oz. per linear yard. A bottom hem of the flexible sheet includes a weight and the hem further includes a multiplicity of overfolds housed in a trough.

Abstract: A dual mode circular-type waveguide filter (10) has a cylindrical waveguide body (12) separated by septums (16, 18) into a plurality of resonant waveguide cavities (22, 24, 26). Mutually orthogonal electromagnetic fields (37, 81) in adjacent cavities (24, 26) are electromagnetically coupled with each other by an internal coupling element (60) which is mounted on one of the septums (18) and extends into the adjacent cavities. The coupling element comprises an elongate, conductive wire which includes a first portion (62) extending into one of the cavities and forming a magnetic loop, and a second portion (64) extending into the adjacent cavity and forming an electric probe. The coupling element provides an asymmetrical stopband pole (72a) in the frequency response (70) of the filter.

Abstract: Fluorochemical copolymers, useful as wet-end papermaking additives which impart oil and water repellency and food stain resistance to ovenable paperboard under food cooking conditions, and as a treatment for imparting oil and water repellency to textile fibers. The fluorochemical copolymers are derived (by weight) from about 60 to 80% fluorochemical acrylate, 1 to 30% alkyl or alkoxyalkyl acrylate or methacrylate, 2 to 15% glycidyl acrylate or methacrylate, 1 to 6% of certain cationic acrylates or methacrylates, and 0 to 20% vinylidene chloride.

Abstract: Fluorochemical copolymers, useful as wet-end papermaking additives which impart oil and water repellency and food stain resistance to ovenable paperboard under food cooking conditions, and as a treatment for imparting oil and water repellency to textile fibers. The fluorochemical copolymers are derived (by weight) from about 60 to 80% fluorochemical acrylate, 1 to 30% alkyl or alkoxyalkyl acrylate or methacrylate, 2 to 15% glycidyl acrylate or methacrylate, 1 to 6% of certain cationic acrylates or methacrylates, and 0 to 20% vinylidene chloride.

Abstract: Cellulosic products are sized with treatment compositions prepared from (a) fluoroaliphatic radical-containing carboxylic acid or a salt or hydrolyzable precursor thereof, (b) water-soluble epoxidic cationic resin made by reacting epihalohydrin with ammonia or aminopolymer, and (c) an optional hydrophobic hydrocarbon sizing agent.