| Man Overboard Beacon |
10 AUG 2005 |
12 pages |
| Authors:
Thomas A. Frank; NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI
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 | A user worn man overboard beacon that provides multiple indication means to alert a ship to an overboard crew person and to assist in locating the crew person. The beacon device is contained in a housing attached to the clothing of the sailor and is activated upon contact with seawater. A battery powers the multiple indicators contained in the housing, which include a high intensity strobe light to provide a ... |
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| Low Frequency Sonar Countermeasure |
09 MAR 2005 |
17 pages |
| Authors:
Thomas A. Frank; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A multi-port projector of acoustic energy in water includes a cylindrical hollow transducer having open annular ends. A thin, flexible member is secured to each annular end to extend across each opening to be displaced by the transducer, and the transducer and flexible members form an interior sealed from ambient water. A battery/electronics module is in the interior and is spaced from the transducer and flexible members to couple driving ... |
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| Portable Flood Control Revetment |
26 JUN 2002 |
13 pages |
| Authors:
Thomas A. Frank; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A portable flood control revetment comprising an elongated collapsible and inflatable tube of flexible material impervious to air and water, the tube having a bottom wall and other walls defining an internal compartment, and a multiplicity of cables in the compartment, each extending from one of the walls to another of the walls to hold the tube in a selected shape when the tube is filled with air or water. ... |
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| Fluid Proulsion Device for use in a Projectile Launching System |
23 MAR 1998 |
24 pages |
| Authors:
Thomas A. Frank; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A fluid propulsion device is used to discharge a working fluid at a predetermined variable discharge rate. The fluid propulsion device includes a fluid chamber that is expandable upon receiving the working fluid. The fluid chamber has a plurality of chamber sections that contract at different predetermined rates to discharge the working fluid from the fluid chamber at the variable discharge rate. In one example, an elastomeric bladder defines the ... |
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| Power Conversion System Modification to Permit Use of DC Power Source. |
07 JUN 1994 |
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| Authors:
Thomas A. Frank; Claude D. Michel; DEPARTMENT OF THE NAVY WASHINGTON DC
|
 | In an electrical power conversion system designed to operate on three-phase AC voltage generated by a motor generator, a modification is provided to permit the use of a DC power source to operate same. The power conversion system has a plurality of AC-to-DC conversion means for converting the generated three-phase AC voltages. The first specified DC voltage is supplied to a voltage reduction means and the second specified DC voltage ... |
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| Power Conversion System Modification to Permit Use of DC Power Source. |
07 AUG 1992 |
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| Authors:
Thomas A. Frank; Claude D. Michel; DEPARTMENT OF THE NAVY WASHINGTON DC
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| The Patent Application Discloses an electrical power conversion system designed to operate on three-phase AC voltage generated by a motor generator, a modification is provided to permit the use of a DC power source to operate same. The power conversion system has a plurality of Ac-to-Dc conversion means for converting the generated three-phase AC voltages. The first specified DC voltage is supplied to a voltage reduction means and the second ... |
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| Contamination Capacitance Probe System. |
30 JUN 1992 |
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| Authors:
Thomas A. O'Connell; Thomas A. Frank; DEPARTMENT OF THE NAVY WASHINGTON DC
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| A contamination capacitance probe system is disclosed that capacitively monitors whether or not two or more fluids or materials that have to remain separated have been mixed or mingled and that provides First and second control signals respectively representative of the unmingled and mingled condition. The system includes a capacitance sensor constituted by spaced-apart first and second capacitor plates of preselected size and spacing. The plate size and spacing is ... |
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