Abstract: Described herein is a method and apparatus for testing transducers either as single devices or in phased arrays. The apparatus includes a device which is housed in a casing (12) and comprises three polyurethane layers (15, 16, 17) each having different acoustic characteristics. A detector array (14) is located between two of the layers (15, 16). Means are also provided for clamping the device against a transducer to be tested to ensure good contact. Depending on the test mode of the transducer, either the transducer or the detector array are driven to provide signals which are detected by the other.

Abstract: The present invention provides a high energy solid propellant containing an oxidizer, binder and fuel, wherein the fuel and/or the propellant as a whole is encapsulated or microencapsulated so as prevent premature reaction while still maintaining the energetic properties thereof. The oxidizer is preferably ammonium perchlorate, ammonium nitrate or ammonium dinitramide. The binder is preferably polymeric hydrocarbons or polymers. The fuel is preferably lithium hexahydridoborane or lithium hexahydridoalane.

Abstract: A strip of tire ply stock is reinforced with steel cords wherein the steel cords are constructed of high strength wire filament having at least a tensile strength of ?2000 ×D+4400 MPa where D is the filament diameter in mm. Tires are constructed with the ply stock in the belt and/or carcass.

Abstract: The present invention provides a liquid hypergolic propellant. In particular, a liquid hypergolic propellant is provided, containing reactive metals and/or reactive metal salts, and one or more liquid fuels, which is hypergolic when combined with an oxidizer. In addition, a sensitizer and gelling agent may be added. The reactive metals and/or reactive metal salts are defined by Formula I as follows: AxMyHz ??I. wherein A is one or more of any of Li, Na, and K; M is one or more of any of B, C, and Al; H is H; x is 0-3, y is 0 or greater, and z is 0 or greater, and wherein when x is 0, y is 1, and when y is 0, x is 1. The fuels are defined by the following Formula II as follows: CxHyOzNv ??II. wherein x is 0-8, y is 1-18, z is 0-4, and v is 0-5, and wherein when x is 0, v is 1 or greater.

Abstract: A deflector (1) for attachment to a spiral separator (2), for capturing and redirecting a portion of a flowing stream of material (5). The deflector (1) includes an attachment means (3), to attach the deflector (1) to the spiral separator (2), a capturing portion (4) to capture a portion of the flowing stream (5), and, a redirecting portion (6) to emit a portion (7) of the stream. A method of separating particles of different densities using the deflector device (1) in conjunction with a spiral separator (2) is also disclosed.

Abstract: Novel compounds having the structure (I) where R1 is a lower alkyl group, R2, R3, R4 and R5 is each independently hydrogen or a lower alkyl group, R6 is hydrogen, a lower alkyl group, an alkylidene group or a lower alkenyl group and R7 is hydrogen or a lower alkyl group, have desirable odor properties, possibly of a blackcurrant, green, buchu, cassis nature, and find use in perfumes and perfumed products.