Abstract: A fluid flow control valve which includes a body formed to define a chamber having inlet, outlet and actuating ports for supplying and receiving fluid to and from external hydraulic machinery to be actuated and including a valve spool formed with several lands and slidably arranged in the chamber for controlling the flow of fluid through the ports, in which the lands and ports are located and arranged so that some of said ports transmit fluid only from said chamber outward while the remainder of the ports transmit fluid only from the ports into the chamber, and which also includes a matrix of restrictors interposed in each of those ports which transmits fluid outward from the chamber, and in which the lands are arranged to control the flow of fluid through only those ports which transmit fluid outward while leaving the flow of fluid into the chamber through the remaining ports unimpeded for all positions of the spool.

Abstract: A modular buoy system in which a number of similar sonobuoys are housed in a common container. Associated with each sonobuoy is a launching mechanism. A circuit is provided for actuating these launching mechanisms separately so that the sonobuoys may be ejected from the container one at a time.

Abstract: A fluid actuated gyroscope having a hollow rotor provided with apertures defining nozzles through which compressed fluid within the housing flows to the interior of the rotor before being discharged. This flow causes the rotor to spin up to speed rapidly. Also described is a caging piston which, with its associated apparatus, performs the dual function of providing a passageway for venting the interior of the rotor during spin up and for caging and uncaging the gimbals.

Abstract: A hydrophone array system comprising a plurality of hydrophones fastened to a cable is deployed beneath the sea in a substantially horizontal straight line. A small powered thruster fastened to one end of the cable urges it in a first direction and this urging is resisted by a member, such as a drogue or an anchored subsurface float, fastened to the other end of the cable. Individual signals from each of the hydrophones are conducted to the surface where they are processed and transmitted by a radio link to a nearby aircraft or surface vessel. Beam forming and analysis is performed aboard the aircraft or surface vessel.

Abstract: A power supply system including a sea water battery for supplying a light load and/or a heavy load. A pump is actuated concurrently with the energization of the heavy load and is hydraulically connected to pump sea water electrolyte through the battery.

Abstract: A two-stage fluid flow control valve system employing feedback such that the rate of flow of fluid through the load connections follows an input signal very closely over a wide dynamic range. The system employs poppet valves as flow sensors in the return line. The rate of flow of fluid through these sensors is a non-linear function of the pressure thereacross such that the change in pressure drop resulting from a given displacement from a set flow rate is greater at low ranges of flow than at high ranges. The result is closer control at low rates of flow where such control is normally more difficult to achieve.

Abstract: A terminal device is disclosed which includes a typewriter and a keyboard in which the actuation of each key generates a signal in a first code which signal is temporarily stored. Also included is a code converter which translates the signal into a second code suitable for actuating the typewriter so as to print a character, corresponding to each actuated key, in a first location. Provision is also made for typewriting a message from a remote computer in a second location.

Abstract: The specific information storage and retrieval system described herein stores 49,000 microfiches in a central file, any one of which may be viewed in a matter of seconds. More specifically, the central file uses an arrangement of 20 shelves mounted on a closed loop track, each holding 2,450 microfiches, each microfiche in turn having 50 or 60 separate images. When a particular microfiche is selected, the proper shelf is rotated into a predetermined position. Concurrently a viewing station including a transducer such as a film camera or a television camera is brought adjacent to the selected microfiche which is partially extracted from its storage location so as to be viewed by the transducer.