Abstract: A fuel supply system for use in rotary wing aircraft is described. The system comprises a separating means 10 for: receiving an air, vapor and fuel mixture at relatively low pressure from a fuel tank; separating the air and the vapor from the mixture; and providing a fuel supply at a relatively high pressure, and a pump means 12 for returning the separated air and vapor to the tank.

Abstract: A pipelined digital signal processor includes a common data and control bus (101) and a source (100,105) of instructions and data words. An arithmetic section (110) processes one data word with another data word through selected processing subsections performing operations according to an expression, thereby producing a resultant data word. A destination (105) receives the resultant data word from the arithmetic section. Control circuits (IR-L,M,N and IR-S,T) receive a single instruction (i.e., I.sub.i) during each processor cycle for controlling all processing subsections (112, 115, 116) operations. During each processor cycle, each processing subsection (i.e., 112) performs an operation relating to a different expression than the other processing subsections (i.e., 115 or 116) are performing during that processor cycle. All of the operations controlled by the single instruction (i.e., I.sub.i) are executed during a single processor cycle.

Abstract: A pipelined digital processor includes a common data and control bus and a source (100 or 105) of instructions and data words. An arithmetic section (110) processes one data word with another data word through selected processing subsections (112, 115, 116) performing operations according to an expression, thereby producing a resultant data word and a status signal. A destination (105) receives the resultant data word from the arithmetic section. Control circuits (IR-C) decode a single conditional instruction for controlling performance of a specific condition test during a first subsequent processor cycle (i.e., i+2). The control circuits further decoding another instruction word during the first subsequent processor cycle for controlling all processing sections operations during a second subsequent processor cycle (i.e., i+3).

Abstract: A timing system, for distributing clock signals in a synchronous processing system having plural processing sections, includes a central clock circuit and a plurality of section clock circuits, each section clock circuit being located in and associated with a different one of the processing sections. Each section clock circuit is arranged to respond to a system clock signal for stepping through a plurality of states including a state common to the plurality of section clock circuits. An arrangement, responsive to the system clock signal, produces and transmits to the plurality of section clock circuits a synchronization signal that routinely sets the plurality of section clock circuits to the common state. The timing system may further include an arrangement for controlling suspension of processing in the plural processing sections.

Abstract: The growth of Clostridium botulinum and the formation of enterotoxin in carbohydrate food products, such as honey, is inhibited by adding to the carbohydrate food products an effective amount of a compound selected from the group consisting of hypophosphorous acid and its nontoxic water-soluble salts. Such additives may be present in combination with minor amounts, for example 40 ppm, of sodium nitrite.

Abstract: The addition of an effective amount of a compound selected from the group consisting of hypophosphorous acid and salts thereof to cheese during manufacture prevents clostridial and coliform blowing and the formation of clostridial enterotoxins in cheese.

Abstract: The growth of Clostridium botulinum and the production of enterotoxin in comminuted meat products is inhibited by adding to such products an effective amount of a compound selected from the group consisting of hypophosphorous acid and non-toxic salts thereof in combination with minor amounts of sodium nitrite.

Abstract: The growth of Clostridium botulinum and the production of enterotoxin in corned beef and poultry products is inhibited by adding to such products an effective amount of a compound selected from the group consisting of hypophosphorous acid and nontoxic water-soluble salts thereof in combination with minor amounts of sodium nitrite.

Abstract: A smoked fish product, which inhibits the growth of Clostridium botulinum and the production of enterotoxin during storage of the smoked fish, containing an alkali metal nitrite salt and a compound selected from the group consisting of hypophosphorous acid and sodium, potassium, calcium, and manganese salts thereof.

Abstract: Smoked meat products which inhibit the growth of Clostridium botulinum and the production of enterotoxin during storage obtained by adding to the meat products an alkali metal nitrite salt, in an amount less than 120 parts per million, and from about 1,000 to about 3,000 parts per million of a compound selected from the group consisting of hypophosphorous acid and salts thereof.

Abstract: The growth of Clostridium botulinum and the production of enterotoxin in smoked meat products, such as bacon, is inhibited by adding to the meat products a compound selected from the group consisting of hypophosphorous acid and sodium potassium, calcium and manganese salts thereof.

Abstract: The growth of Clostridium botulinum and the production of enterotoxin in smoked fish is inhibited by adding to the fish a compound selected from the group consisting of hypophosphorous acid and sodium, potassium, calcium and manganese salts thereof. Such additive may be present in combination with minor amounts of sodium nitrite.

Abstract: The echo path of an echo signal subjected to a time-varying phase shift is bridged by echo cancelling apparatus including a variable phase shifter and an adaptive echo canceller connected in series. The variable phase shifter includes an adaptive control loop whose operation is compatible with that of an adaptive echo canceller. The phase-shifter control loop derives a control signal from the output signal synthesized by the echo cancelling apparatus and the residual echo produced by subtracting this output signal from the echo path signal. The control signal is used to produce a variable phase shift on the signal passing through the variable phase shifter in the echo cancelling apparatus. The echo canceller adaptively synthesizes a replica of the echo signal produced by the linear dispersive portion of the echo channel, while the variable phase shifter is adapted to impart a time-varying phase shift corresponding to the time-varying phase shift encountered by the echo signal in the echo path.