Abstract: An assembly is provided for retaining standard electrical plugs within receptacles in environments having vibration and shock conditions that loosen normal electrical plugs. The present invention includes an adapter with a first locking mechanism for locking the adapter to the electrical receptacle. The adapter contains a standard electrical receptacle to receive the power plug prongs of the power plug. In a preferred embodiment, a restraining collar is mounted adjacent the power plug and secured to the adapter with tie straps to thereby secure the power plug to the adapter.

Abstract: A method is provided to capture and process wire guidance fire control command tones. The method is implemented on a computer, which monitors and displays the wire guidance command tones in real time, showing the tone or signal over time. A user controls the beginning and ending of the capture period. The captured data is stored within the computer. Once data capturing has ended, the full record of the captured data is displayed. The display includes active cursors denoting the start and stop of the recorded event. The cursors may be positioned independently along the data display so as to bracket a tone event of interest. Once the cursors are positioned, the method updates the display to show only the bracketed event. The time duration of the event is also shown as well as a computed frequency for the event. The user may then continue refining the positions of the cursors to accurately identify the event of interest.

Abstract: An optical fiber holding apparatus is provided for nondestructively suppong one or more optical fibers. For each optical fiber, a rod has a slot formed along its length to receive therein one optical fiber. A retainer is mated with the rod such that the retainer is in contact with the optical fiber. A support block has a borehole defined by a first portion extending from a first side of the block to an annular shoulder within the block. The first portion is sized to receive the rod with its optical fiber and retainer so that the retainer holds the optical fiber within the rod's slot. The borehole further has a second portion extending from the annular shoulder through to a second side of the block opposite the first side. The second portion has a cross-section large enough to allow the optical fiber extending the end of the rod to pass through the second side of the block.

Abstract: Apparatus for absorbing acoustic energy directed toward a wall. The appars includes a piezoelectric layer intermediate the wall and the source of the acoustic energy. Circuitry attached to the output of the transducer compensates blocked and motional capacitances of the transducer so that the output signal generates real current for dissipation in a resistor thereby to minimize any echo reflected from the piezoelectric layer.

Abstract: Electrodes and magnets are disposed in alternating relation on confronting urfaces of microgrooves that respectively produce electric and magnetic fields that are cooperative to provide a force that acts along a flow direction defined between a vessel and a relatively moving medium to controllably diminish turbulence generation in seawater.

Abstract: A muffler for an air powered turbine drive includes a cone section made of perforated metal, a plurality of layers of sintered material on the inner surfaces of the cone section, an inner housing section substantially surrounding the cone section, an inner baffle wall between the inner housing section and the inner cone section, and an outer housing section substantially surrounding the inner housing section. Air entering the muffler through the cone section passes outwardly through the walls of the cone section and is then redirected several times before passing outwardly from the outer housing section in order to attenuate the noise in the air leaving the muffler without creating excessive muffler pressure.