Electrodes And Electrode Systems Patents (Class 340/852)
  • Patent number: 9989664
    Abstract: Disclosed herein is a remote operating vehicle (ROV) for use in a subterranean mining process, such as to extract material from beneath a rock layer. The ROV may be provided as a number of components each including their own umbilical cord. Each of the components may be lowered through a borehole and assembled together to form the ROV underground. Also disclosed herein is a device and method for in-line monitoring of a mining material to determine the presence of a material of interest in the mining material. The device includes conductive plates that are spaced apart. The device detects the presence of a material of interest as it passes through the spacing between the conductive plates.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: June 5, 2018
    Assignee: VDL GOLD PTY LTD
    Inventor: John Gordon Mackay Campbell
  • Patent number: 9970642
    Abstract: An anti-explosion LED lamp housing is used to separate an illumination module from an external environment and comprises a housing body and a housing cover. The housing body includes a shell having a spherical segment-like shape, an accommodation basin connected with the concave portion of the shell, and a wiring hole penetrating the housing body and the accommodation basin. The accommodation basin includes a first platform encircling the wiring hole and receiving the illumination module; a second platform encircling the first platform and having a level difference to the first platform; and an annular wall encircling the second platform. The housing cover includes a light-permeable plate disposed on the second platform; an annular pressing element forcing the light-permeable plate to press against the second platform and engaged with the annular wall tightly. The diameter of the circular base face of the shell is 4-15 times the height of the shell.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: May 15, 2018
    Assignee: LI-HONG SCIENCE & TECHNOLOGY CO., LTD.
    Inventors: Ming-Tien Chien, Ching-Yuan Juan, Han-Wen Chang, Mei-Hsiang Wu, Wei-Cheng Juan
  • Patent number: 9641261
    Abstract: Wearable wireless electronic devices are provided. A wearable wireless electronic device may be a wearable first wireless electronic device that may include a user-wearable transmitter. The user-wearable transmitter may include first and second electrodes that are spaced apart from each other. The first and second electrodes may include first and second curved portions, respectively, when the user-wearable transmitter is worn by a user. Moreover, the first and second electrodes may be configured to transmit communications through a human body of the user to a second wireless electronic device on or adjacent the human body of the user.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: May 2, 2017
    Assignees: SONY CORPORATION, SONY MOBILE COMMUNICATIONS INC.
    Inventors: Zhinong Ying, Kun Zhao
  • Patent number: 9590697
    Abstract: Embodiments include systems of and methods for an electronic device having a radio communication processor connected to one or more transmission antennas, wherein each of the one or more transmission antennas are configured to transmit a signal; a receiving antenna connected to the radio communication processor and configured to receive the signal transmitted from the one or more transmission antennas; an attenuation measuring device configured to measure attenuation of the transmitted signal based on the signal received by the receiving antenna; and a controller configured by circuitry to determine a surrounding air or water environment of the electronic device based on the measured attenuation.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: March 7, 2017
    Assignees: Sony Corporation, Sony Mobile Communications Inc.
    Inventor: Yuji Ide
  • Patent number: 9383988
    Abstract: The system automatically creates an update from an old version to a new version despite the old version possibly being several version prior to the new version. There may be some increments in the version for which no change needs to be made to the application running on the client system, even though the code running on the host may have been updated. A graph of the versions is constructed based on the new version and old version. The updates for consecutive versions for which no format change is needed are collapsed into a single no operation update or combined into a single update with an update that requires an operation. Then the shortest path along the graph connecting the current version and new version is determined. The update steps along the shortest path are automatically combined into a single update, and then the update is performed.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: July 5, 2016
    Assignee: salesforce, inc.
    Inventor: Yuri Rychikhin
  • Patent number: 9250082
    Abstract: A method for determining a displacement of an anchor comprises the steps of: determining an initial position of the anchor; determining a displacement of the anchor by measuring anchor acceleration values, measuring at least one further physical quantity associated with the anchoring, deciding whether the anchor is at rest or in motion, wherein a value of the further physical quantity is taken into account in the decision, and integrating the acceleration values twice over time during intervals when the anchor is deemed to be in motion.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: February 2, 2016
    Inventor: Thomas Frizlen
  • Patent number: 9164189
    Abstract: A method for managing a multi-vessel seismic system including a first vessel, having a recording system and towing a streamer integrating seismic sensors, and a second vessel, including at least one seismic source performing shots. The second vessel sends to the first vessel a plurality of series of shot predictions. For each shot, the second vessels activates the seismic source according to the predictions and sends to the first vessel shot data relating to the shot. The first vessel activates the recording system. If the first vessel has not received the shot data relating to at least one performed shot, it sends a request to the second vessel and receives in response the missing shot data. For each performed shot and the related shot data, the system selects seismic data and combines the selected seismic data with the related shot data to obtain combined data allowing a seabed representation.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: October 20, 2015
    Assignee: SERCEL
    Inventor: Didier Renaud
  • Patent number: 8890710
    Abstract: An electromagnetic telemetry repeater. At least some of the illustrative embodiments are methods comprising inducing an electrical signal along a metallic tubular (the electrical signal carrying the information and the inducing within a borehole beneath the ocean floor), sensing an electric field proximate to the ocean floor, sensing a magnetic field proximate to the ocean floor, recreating the information using one sensed field as indicative of the information and the other sensed field as indicative of the noise, and sending the information toward the ocean surface.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: November 18, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Paul F. Rodney
  • Patent number: 8773277
    Abstract: A routing facility (1) for a subsea electronics module (7) has on a single circuit board (2) a facility (5) for routing data packets between segments of a differential serial bus, and at least one input/output interface (14, 15, 16) for digital and/or analog process values, wherein the process values are accessible via the differential serial bus.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: July 8, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Endre Brekke, Vegard Horten, Vidar Steigen
  • Patent number: 8711045
    Abstract: An EM antenna for location on a pipe (10) surrounded by a casing (12). The antenna has a power source (21) for injecting a current across a first insulated section (25) of the pipe (10) and an electrode (22) for conducting the current from the pipe (10) to the casing (12). There is also a second insulated section (23) of the pipe arranged to operate together with the electrode (22) and first insulated section (25) for directing a path flow of the current. Such antennas are described both in relation to repeater arrangements as well as land and sea applications.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: April 29, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Matthe Contant, Erwann Lemenager, Yves Mathieu, Sylvain Chambon
  • Patent number: 8711002
    Abstract: A subsea control module has a casing inside which there is at least one pair of electrodes, there being electronic means connected with the electrodes of the or each pair for monitoring at least one electrical characteristic between the electrodes as a result of a fluid to which the electrodes are exposed. This can include, for example, a change due to an ingress of seawater and/or an ingress of hydraulic fluid into the interior of the casing. The or each pair of electrodes include an array in which each electrode of the pair has finger portions interleaved with finger portions of the other electrode.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: April 29, 2014
    Assignee: Vetco Gray Controls Limited
    Inventors: Julian R. Davis, Simon David Gill, Adrian John Derrick
  • Patent number: 8606177
    Abstract: Provided are an apparatus and a method for controlling human body contact of ground electrode, and a human body communication system using the same. The apparatus includes a resistance measuring unit for applying a predetermined voltage to a human body through a signal electrode, to measure a resistance value between the signal electrode and the ground electrode; a contact control unit for determining whether the ground electrode needs to contact the human body by using the measured resistance value, to provide control information associated with human body contact; and a contact performing unit for bringing the ground electrode into contact or out of contact with the human body according to the control information.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: December 10, 2013
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Institute
    Inventors: Jung-Hwan Hwang, Sung-Weon Kang, Kyung-Soo Kim, Jung-Bum Kim, In-Gi Lim, Chang-Hee Hyoung, Sung-Eun Kim, Duck-Gun Park, Jin-Kyung Kim, Hyung-Il Park
  • Patent number: 8482274
    Abstract: Apparatus and methods for detecting stray voltage anomalies in electric fields are provided herein. In some embodiments, an apparatus for detecting an electrical field may comprise: at least one sensor probe for generating data corresponding to an electrical field detected by the at least one sensor probe, wherein the at least one sensor probe comprises at least one electrode; a processor, coupled to the at least one sensor probe, for analyzing the data to identify a voltage anomaly in the electric field; and an indicator, coupled to the processor, for alerting a user to a presence of the voltage anomaly in the electric field.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: July 9, 2013
    Assignee: Power Survey LLC
    Inventors: David Kalokitis, Leonard Joshua Schultz, Christos Alkiviadis Polyzois, Vincent Paragano, Jr.
  • Patent number: 8427336
    Abstract: A subsea control module has a casing (1) inside which there is at least one pair of electrodes, there being electronic means (26-33) connected with the electrodes of the or each pair for monitoring at least one electrical characteristic between the electrodes as a result of a fluid to which the electrodes are exposed, the or each pair of electrodes comprising an array (19) in which each electrode of the pair has finger portions interleaved with finger portions of the other electrode.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: April 23, 2013
    Assignee: Vetco Gray Controls Limited
    Inventors: Julian R. Davis, Simon David Gill, Adrian John Derrick
  • Patent number: 8305227
    Abstract: The present invention provides a wireless auxiliary system for monitoring and control of an underwater installation. The auxiliary system of the present invention sends data and control signals between an underwater installation—for example, a lower stack 26 in a hydrocarbon drilling or production facility—and an associated riser assembly 23. Data is collected by sensor network 208A, 208B and is transmitted from a first transceiver 201 to a second transceiver 203 by electromagnetic signals. First transceiver 201 is powered by a local power supply 205. To conserve power consumption, the first transceiver is designed to become active for a short time and then to switch to an inactive mode. For example, wireless data transfer may occur after the detachment or just prior to the reattachment of riser assembly 23 to the underwater installation. Wireless data transfer may also occur on receipt of a handshaking signal from second transceiver 203.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: November 6, 2012
    Assignee: WFS Technologies Ltd.
    Inventors: Andrew Jaffrey, Brendan Hyland
  • Patent number: 8299936
    Abstract: A method for generating electromagnetic waves in the ELF/ULF comprising the steps of using a ground-based Horizontal Electric Dipole (HED) antenna to send electromagnetic pulses upwardly in the E-region of the ionosphere to form an oscillatory or pulsed electric field; allowing said pulsed electric field to interact with magnetized plasma of the lower ionosphere to generate a pulsed horizontal and vertical current which have associated Horizontal and Vertical Electric Dipole moment; and allowing them to radiate.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: October 30, 2012
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Konstantinos Papadopoulos
  • Publication number: 20110187553
    Abstract: An electromagnetic telemetry repeater. At least some of the illustrative embodiments are methods comprising inducing an electrical signal along a metallic tubular (the electrical signal carrying the information and the inducing within a borehole beneath the ocean floor), sensing an electric field proximate to the ocean floor, sensing a magnetic field proximate to the ocean floor, recreating the information using one sensed field as indicative of the information and the other sensed field as indicative of the noise, and sending the information toward the ocean surface.
    Type: Application
    Filed: July 31, 2008
    Publication date: August 4, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventor: Paul F. Rodney
  • Publication number: 20100102985
    Abstract: A system for determining the position and/or orientation of electromagnetic receivers in a network of receiver instruments at a remote location, a first receiver instrument including one or more electromagnetic sensors, the system comprising transmitting means to send a characteristic signal, detecting means to detect transmitted signals from a plurality of receiver instruments, depth measurement means to measure the depth of the first instrument, recording means to store data from the transmitting means, the detecting means and the depth measurement means, and processing means for processing data from the receiver instruments.
    Type: Application
    Filed: September 24, 2007
    Publication date: April 29, 2010
    Applicant: ELECTROMAGNETIC GEOSERVICES ASA
    Inventors: David Ridyard, Mark J. Wilkinson
  • Patent number: 7610387
    Abstract: In a network having a plurality of routers and also an application running at a plurality of replicas, a system for maintaining a client session between a client and a particular replica includes providing a database of bindings of client request identifiers to replicas. The system further includes a change log of changes made to the database where each entry has an event number. A version vector associated with the database and the change log holds a most recent event number for each router in the network. The system receives updates of change events made at the routers in the network and reconciles the updates with the database and current version vector. The system has data to maintain a client session between the client and the particular replica through repeated requests. Also the system and routers share data so that the client session can be maintained no matter which router handles subsequent client requests.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: October 27, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Barbara Liskov, David M. Bornstein
  • Publication number: 20090015262
    Abstract: A sensor cable system for measuring electromagnetic response of the Earth's subsurface includes a sensor cable deployable on the bottom of a body of water. The sensor cable has a plurality of electromagnetic sensing devices thereon at spaced apart locations. A system control unit is in signal communication with the sensing elements. The system control unit includes a transceiver for communicating signals to and from a corresponding sensor cable system. The system control unit includes a global positioning system signal receiver. The system control unit includes a processor configurable to receive signals detected by sensing elements in the corresponding sensor cable system. The processor is configurable to compute stacked signals from the sensing elements in the sensor cable and from sensing elements in the corresponding system. The processor is configurable to calculate a statistical measure of the stacked signals. The system control unit is disposed in a flotation device.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 15, 2009
    Inventors: Kurt M. Strack, Ian McMillan, Stefan L. Helwig
  • Patent number: 7412944
    Abstract: A cord having two electrodes for generating a shark-repelling electromagnetic field about a user. The cord is connected to a field generator supported by the user, and in use, maintains contact with surrounding water, even if the user is out of the water.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: August 19, 2008
    Assignee: SeaChange Technology Holdings Pty Ltd
    Inventor: Michael Wescombe-Down
  • Publication number: 20080048881
    Abstract: A technique includes deploying a monitoring station near the sea surface and on the monitoring station, monitoring a position of a subsurface device as the subsurface device moves in a path between the sea surface and the sea floor. The technique includes communicating an indication of a position of the subsurface device from the monitoring station to a surface vessel.
    Type: Application
    Filed: August 24, 2006
    Publication date: February 28, 2008
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kambiz A. Safinya, Erik Vigen
  • Patent number: 7245046
    Abstract: System and method for re-routing internal power for reducing voltage requirements of a submarine transmission system. A power supply supplies power to a bridge rectifier circuit (10) the latter biasing a plurality of Zener diodes (11; 12; 13; 14; 15; 16) which are connected in parallel arrangement with respective optical amplifiers (21; 22; 23; 24; 25; 26). The bridge rectifier circuit (10) is arranged such that a first predetermined number of Zener diodes (23; 24; 25; 26) are biased in forward bias direction thus operating as normal diodes with a low voltage drop, whereas a second predetermined number of Zener diodes (21; 22) are biased in reverse or powering direction thus powering respective optical amplifiers.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: July 17, 2007
    Assignee: Alcatel
    Inventor: Derek C. Willetts
  • Patent number: 7125146
    Abstract: An underwater light, e.g., for a pool or spa, includes an ordinarily watertight housing, an outer compartment within the housing and floodable by water flowing therein in the event the housing is no longer watertight, a current shield within the outer compartment and at least partially defining an inner compartment within the outer compartment, a light emitter within the inner compartment, a passageway communicating between the inner and outer compartments such that outer compartment flood water can enter the inner compartment and contact the light emitter, and a conductor. The conductor is positioned so as to collect stray electrical current conducted from the inner compartment by water within the passageway, thereby reducing the risk of shock presented by such stray electrical current. The underwater light is installable within a wet niche, and includes a transformer housed in a separate compartment that extends into the wet niche for thorough cooling thereof.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: October 24, 2006
    Assignee: H-Tech, Inc.
    Inventors: Vance E. Willis, Ronald H. Griffin, Vitaly Shinkarev
  • Patent number: 7102532
    Abstract: Methods of subsea communication in which a cathodic protection anode is used as a transmitting antenna. The signals are received at a second location by two electrodes which are spaced apart by different distances from the transmitting antenna.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: September 5, 2006
    Assignee: Expro North Sea Limited
    Inventor: Steven Martin Hudson
  • Patent number: 7058305
    Abstract: An optical submarine communication system has a land cable connected to a terminal apparatus which is installed on land near the seashore for transmitting an optical signal and electric power. The land cable is connected to an optical submarine cable through a beach manhole, and a repeater is connected to the optical submarine cable. The optical submarine communication system has a surge suppressor provided on the land cable, whereby a surge generated from the terminal apparatus side because of a lightning stroke or an insulation failure is suppressed and prevented from reaching and damaging the repeater.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: June 6, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuhiko Horinouchi, Hirotaka Muto, Satoshi Kumayasu, Masaki Nakaoka
  • Patent number: 6999857
    Abstract: A wireless power transmission and communication network that provides efficient interrogation and powering of sensors for use on undersea vehicles. The present invention employs a wave-guide that allows the propagation of electromagnetic waves through a dielectric material that covers the exterior of an undersea vehicle's hull. Embedded within the dielectric material is an N dimensional array of Micro Electronic Mechanical Systems sensing devices coupled with radio frequency (RF) decoders and transceivers, and strips of conductive metal tape. Electromagnetic waves such as microwaves propagate through the dielectric material both powering the sensor network and addressing and interrogating individual sensing devices. The sensing devices take readings and then format and transmit the data results back across the wave-guide where they are received and processed by a digital processor within the hull of the undersea vehicle.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: February 14, 2006
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Rolf G. Kasper, Anthony B. Bruno, James D. Hagerty, Promode R. Bandyopadhyay
  • Patent number: 6989755
    Abstract: A signal transmitting apparatus which makes exchanging information when pouring a liquid possible. A container body 201 of a transmitter side container 20 holds an electrically conductive liquid 402. A display 306 for confirming data reception is attached to a container body 211 of a receiver side container 21. The container body 201 and the container body 211 are electrically connected at a predetermined impedance by the liquid 402. Because digital data is modulated by a carrier of approximately 10 MHz, an electromagnetic field is generated. In particular, a return line 404 due to an electromagnetic near field is generated, and communications from the transmitter side container 20 to the receiver side container 21 becomes possible.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: January 24, 2006
    Assignee: Sony Corporation
    Inventors: Nobuyuki Matsushita, Shigeru Tajima, Yuji Ayatsuka, Tota Hasegawa, Hidenori Karasawa, Eduardo Agusto Sciammarella, Junichi Rekimoto
  • Patent number: 6972690
    Abstract: A system for transmitting a signal through an imperfectly-conducting medium includes a transmitter station and a receiver station. The transmitter station has a transmitter and at least one conductor. The receiving station has at least one conductor and a receiver. The transmitter causes a current to flow from the transmitter conductor to the receiver conductor through the imperfectly-conducting medium. Associated with the current flow is an electric field. Because the current flow varies with the signal, the electric field varies with the signal. The receiving conductor senses the electric field and provides a signal to the receiver which detects the signal to be transmitted. The receiving station then passes the signal to an output device to be output.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: December 6, 2005
    Assignee: Vortant Technologies LLC
    Inventor: Philip P. Schaefer
  • Patent number: 6854375
    Abstract: An open loop magnetic field minesweeping system, with a small and light weight body to be towed through seawater by a towing cable from a helicopter or other vehicle, a single sweep cable extending rearwardly a substantial distance from the body with a first electrode in cable, sleeve or sock form attached to the end of the sweep cable, and a second electrode positioned forwardly of the body to be towed and extending along and connected to the towing cable. A rectifier and transformer on the body convert AC power fed to the towed body from the towing vehicle, to DC power applied across the first and second electrodes. A plurality of fairings attached to the towing cable each have an electrically conductive portion electrically isolated from the towing cable. The electrically conductive portions are electrically connected together to form the second electrode. Each fairing has a plastic nose piece attached to the towing cable and an electrically conductive metal tail piece.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: February 15, 2005
    Assignee: Edo Corporation
    Inventor: Joseph S. Cangelosi
  • Patent number: 6765487
    Abstract: A method and apparatus for detecting and deterring underwater threats is provided that uses numerous anodes and sensors around a ship or other waterborne structure to monitor for intruders and issue electrical shocks to the intruders in increasing amounts to deter sabotage. The underwater detection and deterrent system would provide an alarm and the approximate location of the intruder when the electrical field changes in response to the intruder. The system is capable of providing a lethal electrical shock to the intruder if necessary.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: July 20, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: John J. Holmes, John F. Scarzello
  • Publication number: 20040051649
    Abstract: Methods of subsea communication in which a cathodic protection anode (13) is used as a transmitting antenna. The signals are received at a second location by means of two electrodes (22, 23, 32, 33) which are spaced by different distances from the transmitting antenna.
    Type: Application
    Filed: July 2, 2003
    Publication date: March 18, 2004
    Inventor: Steve Martin Hudson
  • Patent number: 6333685
    Abstract: A submergence detection portion 21 is provided in a circuit substrate, or the like, which carries electronic circuits of a power window control portion. The submergence detection portion 21 is configured to have an elliptical hole portion 25 provided in the circuit substrate so as to be immersed in water in case of submergence of a vehicle, and electrically conductive patterns 26 and 27 provided in the circuit substrate so as to be opposite to each other with respect to the hole portion 25. End portions of the electrically conductive patterns 26 and 27 near to the hole portion 25 are formed as electrically conductive pads 26a and 27a made of electrically conductive portions exposed. When the hole portion 25 is filled with water in case of submergence, the electrically conductive patterns 26 and 27 are electrically connected to each other.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: December 25, 2001
    Assignee: Yazaki Corporation
    Inventor: Ryoji Miyake
  • Patent number: 6317055
    Abstract: A monitor information transmitting/receiving apparatus transmits/receives monitor information data about each cable landing station in a submarine cable system in which a plurality of cable landing stations are arranged in the form of a ring. The apparatus includes a monitor information setting section and a selection section. The monitor information setting section generates monitor information to be sent by setting monitor information about a self-station in monitor information including monitor information data about each station which is received through each of routes in two directions, and containing data for specifying set times in the monitor information. The selection section selects data, of the monitor information data about the respective stations which are received through the respective routes in the two direction, which corresponds to new set time as latest monitor information data.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: November 13, 2001
    Assignee: NEC Corporation
    Inventor: Takanori Fujisawa
  • Patent number: 5460123
    Abstract: The present invention comprises apparatus designed to repel, but not injure, warm-blooded aquatic life from a specific aquatic region in an energy-efficient manner. A potential gradient is turned on and maintained between sets of immersed electrodes in response to the detection of the presence of warm-blooded animals in the "watched" volume at the surface and above and below the surface of an aquatic region. The electroshock is applied to the animal through the water by use of an electrical field generated from an array of electrodes placed in the water. The size, shape, and intensity of the electrical field are independently controlled by use of design criteria which allow the operator to determine the degree of electrical shock to be administered to a specific animal species by controlling the parameters of electrical energy induced into the animal through the water.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: October 24, 1995
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: Lawrence Kolz
  • Patent number: 5445111
    Abstract: A variety of electrified fish barriers are suitable for diverting fish from protected structures, e.g. pump intakes. Most take the form of linear curtain arrays (i.e. arrays of fixedly spaced-apart vertical elements). Many are characterized by the use of three or more pulsed driving signals of different voltages. This results in an electrical field pattern that extends broadside of the array, permitting fish an opportunity to turn and swim away before reaching a dangerous field strength. One barrier advantageously integrates the electrodes with a physical control structure that can be used to equalize the through-barrier water flow along its length. Others employ sets of electrodes that are driven in staggered, time-multiplexed fashion so as to reduce peak power requirements. Barriers used to screen pump intakes on the sides of flowing waterways are desirably sized and placed so that the velocity of water flow through the barrier is one-half, or less, of the waterway bypass flow adjacent the barrier.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: August 29, 1995
    Assignee: Smith-Root, Inc.
    Inventor: David V. Smith
  • Patent number: 5229541
    Abstract: A safety system for deterring a homing missile from attacking its launching ehicle whereby the launching vessel is enabled to alter the course and neutralize the detonator of the weapon.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: July 20, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Albert S. Will, Armand Cioccio
  • Patent number: 5206640
    Abstract: A system for detecting and positioning objects, the electric conductivity of which differs from the surrounding medium thereof by measuring variations in an electric field generated into the medium. More precisely, the invention concerns a method and assembly for detecting objects or objectives, for example vessels, in electrically conductive medium, for example sea, by measuring changes, disturbances, signs, indications or the like caused by the object or objective, especially for surveying water fairways and/or extent.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: April 27, 1993
    Inventors: Esko Hirvonen, Juhani Niinivaara
  • Patent number: 5120904
    Abstract: Electrode used for one pole in underwater transmission of high-voltage direct current, an insulated cable being used for the other pole, such electrodes being adapted to be stationary on the bottom of the sea to serve as the anode and the cathode, respectively, while the sea-water constitutes the electric conductor therebetween. What characterises the invention is that the electrode comprises at least one layer (1) of a flexible, electrically conductive material which preferably is resistant to chlorine-alkali, said layer (1) being enclosed between protective structures (2,3) of a flexible, mechanically resistant material which preferably is resistant to chlorine-alkali, at least one protective structure (2) having openings (4) which are positioned across the surface thereof and through which the sea-water comes into contact with the layer (1).
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: June 9, 1992
    Assignee: Permascand AB
    Inventors: Anders Ullman, Lars-Erik Bergman, Sven-Erik Bohlin, Pekka Heiskanen
  • Patent number: 4591293
    Abstract: A device for permitting the relatively precise positioning of two geometrical axes respectively of two elements at least one of the elements being associated with means capable of assuring its displacement characterized in that it comprises in combination at least two acoustic emitters-receivers disposed in a first plane substantially perpendicular to one of said geometrical axes, said axis being defined as the first axis, and capable of emitting toward said axis, said two emitter-receivers not being located on a same line passing through said first axis and in that it comprises a third emitter-receiver situated outside of said plane.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: May 27, 1986
    Assignee: Institut Francais du Petrole
    Inventors: Emile Levallois, Rene Szabo, Jean Clot, Daniel Esteve
  • Patent number: 4468155
    Abstract: Method for placing two submerged elements in a relative determined position, particularly in view of their mutual connection, comprising a first step of controlling the relative displacement of said elements on the basis of the measurement of electric values so as to ensure the alignment of a central point of one end of one element with the longitudinal axis of the other and a second step of progressively bringing the two elements in contact with each other by their relative displacement controlled on the basis of the measurement of their relative distance and mutual inclination angle, by means of acoustic emitters-receivers.
    Type: Grant
    Filed: November 24, 1982
    Date of Patent: August 28, 1984
    Assignee: Institut Francais du Petrole
    Inventors: Emile Levallois, Rene Szabo, Jean Clot, Daniel Esteve
  • Patent number: 4437097
    Abstract: A towable, flexible electrode for high density electrical current transfer to sea water is characterized structural improvements including use of hard drawn aluminum wire and a rotatable and slideable aft slip ring to avoid "bird caging", and towing and electrical connectors having a first portion fixed to the electrode and presenting a boss, and a lug portion having a body with a bore receiving the boss and pinned thereto. The electrode features an optional insulating tube for moving the effective length of the electrode rearwardly of a towing platform.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: March 13, 1984
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: John A. Hudson
  • Patent number: 4399695
    Abstract: A water speed sensing transmitter unit suspended from a fishing boat at the depth fishing gear is being trolled actuates transmission of a pulse signal through the water for detection by a receiver unit mounted on the boat. The frequency of the pulse signal is proportional to the speed of the transmitter unit relative to surrounding water at the trolling depth. The receiver unit recreates a corresponding pulse signal, averages it and triggers a display of the average speed sensed by the transmitter unit over a predetermined period.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: August 23, 1983
    Inventor: Ralph B. Peyton
  • Patent number: 4207568
    Abstract: An improved method and apparatus for underwater communication, the apparatus comprising two dipoles disposed in a common body of water, both dipoles including a pair of separated electrodes, a transmitter connected to one dipole, a receiver connected to the other dipole and a nonconducting hose or tube extending between one of the electrodes of a first dipole and one of the electrodes of the second dipole.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: June 10, 1980
    Assignee: Technology Development Corporation
    Inventor: Norman C. MacLeod
  • Patent number: 4187489
    Abstract: Apparatus for propagating electrical signals through a conducting dielectric fluid such as salt water includes a pair of electrodes, one of which is a point electrode composed of a nipple or finger-like member, and the other of which is a plane electrode composed of an annular plate. The two electrodes are immersed in the conducting dielectric fluid and spaced apart along an axis and then electrical energy is applied to the two electrodes to produce a varying voltage therebetween. The voltage difference is modulated in accordance with information to be transmitted and, as a result, a time-varying polarization field is produced in the conducting medium and this field propagates through the medium.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: February 5, 1980
    Inventor: Paul A. Silberg
  • Patent number: 4185264
    Abstract: Preconditioning of towable, flexible electrodes having a conductive layer nsisting wires helically laid on a bouyant core, to preclude later birdnesting, is accomplished using a flange device having cylindrical mounting portions fixed to the aft end of the core and radially extending flange portions having a circular pattern of guide holes through which aft end portions of the wires pass loosely. The guide holes have their axes disposed at predetermined pitch and convergence angles.
    Type: Grant
    Filed: October 26, 1978
    Date of Patent: January 22, 1980
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: William Chrastina
  • Patent number: RE43492
    Abstract: An underwater light, e.g., for a pool or spa, includes an ordinarily watertight housing, an outer compartment within the housing and floodable by water flowing therein in the event the housing is no longer watertight, a current shield within the outer compartment and at least partially defining an inner compartment within the outer compartment, a light emitter within the inner compartment, a passageway communicating between the inner and outer compartments such that outer compartment flood water can enter the inner compartment and contact the light emitter, and a conductor. The conductor is positioned so as to collect stray electrical current conducted from the inner compartment by water within the passageway, thereby reducing the risk of shock presented by such stray electrical current. The underwater light is installable within a wet niche, and includes a transformer housed in a separate compartment that extends into the wet niche for thorough cooling thereof.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: June 26, 2012
    Assignee: Hayward Industries, Inc.
    Inventors: Vance E. Willis, Ronald H. Griffin, Vitaly Shinkarev