Abstract: A flasher type fish sonar includes a front case with a transparent display window, a signal transmitting element at a center thereof, a connecting base board having a first timing detecting portion mounted thereto, a signal receiving element mounted opposite the signal transmitting element, a receiving coil mounted at a periphery of the signal receiving element, a display LED attached opposite the display window, a display rotary disc having a second timing detecting portion mounted opposite the first timing detecting portion and near the display LED, an electric power transmitting coil mounted to the connecting base board opposite the receiving coil, a main base board fixed to the connecting base board and a motor on the main base board for rotating the display rotary disc, such that a a water surface, reflected echos of fishes and a water bottom of the sea are displayed in the display window.

Abstract: A fish type sonar includes a signal transmitting portion having an output connected to an A/D converter, a timing generating portion having an output connected to the signal transmitting portion and the A/D converter, the A/D converter having an output connected to a first buffer memory, the first buffer memory having an output connected to a display signal transmitting portion and a sea bottom detecting portion, the sea bottom detecting portion having an output connected to a display data forming portion, the display data forming portion having an output connected to a second buffer memory, the second buffer memory having an output connected to the display signal transmitting portion, the display signal transmitting portion having an output connected to the display portion of the fish sonar and the portion for displaying the letters, the sea surface, the fish and the sea bottom.

Abstract: A flasher sonar device includes a flasher that produces light output pulses along a flasher ring display based upon sonar returns. A user interface selects between a normal mode and a zoom mode. When the normal mode is selected, a controller drives the flasher to display a normal range. When the zoom mode is selected, the controller divides the normal range into a first range and a second range, compresses the first range into a compressed range, enlarges the second range into an enlarged range, and drives the flasher to display the enlarged range interleaved with the compressed range.

Abstract: A flasher sonar device includes a motor driven flasher that produces light output pulses at angular positions along a flasher ring lens based upon sonar returns. A liquid crystal display (LCD) positioned concentrically with the flasher ring lens displays a dynamic annotated range scale associated with the flasher ring lens. A controller coordinates operation of the motor driven flasher and the LCD.

Abstract: A sonar device includes a light source, a rotatable element, a motor for rotating the rotatable element, and a display. A light guide mounted on the rotatable element has an inlet end aligned with the light source and an outlet end aligned with the display. Light emitted from the light source enters the inlet end of the light guide, is directed from the inlet end to the outlet end in a beam, and is emitted out the outlet end of the light guide.

Abstract: A sonar device includes a light source, a rotatable element, a motor for rotating the rotatable element, and a display. A light guide mounted on the rotatable element has an inlet end aligned with the light source and an outlet end aligned with the display. Light emitted from the light source enters the inlet end of the light guide, is directed from the inlet end to the outlet end in a beam, and is emitted out the outlet end of the light guide.

Abstract: A flasher sonar device includes a motor driven flasher that produces light output pulses at angular positions along a flasher ring lens based upon sonar returns. A liquid crystal display (LCD) positioned concentrically with the flasher ring lens displays a dynamic annotated range scale associated with the flasher ring lens. A controller coordinates operation of the motor driven flasher and the LCD.

Abstract: A light pipe device for fish sonar that displays information such as depth and density of detected objects. The device includes a motor with a rotary shaft, a shaft position sensor, a light conducting pipe fixed to the rotary shaft opposite the luminous tip of the pipe, a light source, and a front panel. Using this device, when a controller detects an object the controller causes the light source to turn on and off as the luminous tip revolves beneath the front panel. Light is transferred to the tip and front panel to indicate information regarding the object.

Abstract: A flasher type fish sonar includes a case, a circuit board mounted in the case, and a motor attached to the circuit board and including a rotary shaft. A light conducting disk is fixed to the rotary shaft and includes a projecting portion for mounting the light conducting disk, a luminous portion and a light conducting portion for conducting light to the luminous portion. A shadow disk is fixed to the luminous portion and includes a slit through which light passes from the luminous portion. A front display disk is provided in front of the shadow disk. A luminous element is connected with the circuit board opposite to the light conducting portion. A fish sonar circuit inputs signals of a surface of a body of water, fish, and a bottom of the water, and a piezoelectric vibrator is connected to the fish sonar.

Abstract: A flasher-type fish finder is provided with a zoom feature that allows the user to select an area of interest within a body of water and then display representations of the objects located within that area of interest.

Abstract: A flasher type fish sonar includes an ultrasonic vibrator transmitting and receiving ultrasonic waves in water, a transmitting circuit supplying oscillating signals to the ultrasonic vibrator, a receiving circuit amplifying reflected signals received by the ultrasonic vibrator, an A/D converter converting the reflected signals to digital signals, an input circuit receiving the digital signals from the A/D converter through a control circuit, a flasher display including a rotary disk having a rotated luminous body and a display board having a window displaying luminosity of the luminous body in response to the digital signals from the input circuit through brushes and slip rings, and a constant current circuit in the input circuit which eliminates changes of electric current flowing to the luminous body due to contact resistance between the slip rings and the brushes.

Abstract: A flasher type fish sonar includes an ultrasonic vibrator transmitting and receiving ultrasonic waves in water, a transmitting circuit supplying oscillating signals to the ultrasonic vibrator, a receiving circuit amplifying reflected signals received by the ultrasonic vibrator, an A/D converter converting the reflected signals to digital signals, an input circuit receiving the digital signals from the A/D converter through a control circuit, a flasher display including a rotary disk having a rotated luminous body and a display board having a window displaying luminosity of the luminous body in response to the digital signals from the input circuit through brushes and slip rings, and a constant current circuit in the input circuit which eliminates changes of electric current flowing to the luminous body due to contact resistance between the slip rings and the brushes.

Abstract: Reflected digital signals of a surface of the water, fish and a bottom are displayed by a usual scale on a half portion of the display board, reflected digital signals of fish and a bottom are reversely read from the second buffer function and are displayed at an enlarged scale on a second half portion of the display board, whereby the surface of the water is displayed on the upper portion of the display board and the bottom of the water is displayed on the lower portion of the display board and the flasher display is very easy to understand and fish inhabiting near the bottom and the bottom are displayed on an enlarged scale.

Abstract: An ultrasonic wave having a narrow directive angle and an ultrasonic wave having a wide directive angle are transmitted in water by two ultrasonic transducers, echo signals to the ultrasonic waves having the narrow and wide angles are displayed by the two luminous elements in unity in a flasher display, whereby the condition of fishes in the water can be seen widely.

Abstract: An improved display for visually presenting the reflected wave information of a sonar or radar by a plurality of displaying light-emitting elements supported on a rotating member. The display comprises a light-receiving unit formed in said rotating member on its rotating axis and including a light-receiving element for receiving an optical signal regarding said reflected wave information and sending it to said plurality of displaying light-emitting elements and a light-emitting unit having a light-emitting opening provided opposite to said light-receiving opening on a fixed member on the rotating axis of said rotating member and including a light-emitting element provided in a fixed member for sending said optical signal to said light-receiving element.

Abstract: Apparatus is provided for adapting an analog depth sounder for the calling out of the depth at regular time intervals. In one embodiment, a self-contained adapter module is mounted to the face of the depth sounder so as to cover the depth sounder display, with the module including a transparent plate carrying a detector array and with electronics and speaker carried at the center of the array. In this embodiment, the detectors are arranged in thin radially extending lines to permit accommodation to displays of different diameter. Alternatively, small detectors are arranged along a circle having a diameter which overlies at least a portion of the orbiting radiating element which radiates along a considerable length. This alternative array configuration also accommodates a range of display diameters. As a further alternative, to accommodate different diameter displays, the thin line detectors may be replaced with radially extending light pipes with detectors at their ends.

Abstract: Apparatus is provided for adapting an analog depth sounder for the calling out of the depth at regular time intervals. In one embodiment, a self-contained adapter module is mounted to the face of the depth sounder so as to cover the depth sounder display, with the module including a transparent plate carrying a detector array and with electronics and speaker carried at the center of the array. In this embodiment, the detectors are arranged in thin radially extending lines to permit accommodation to displays of different diameter. Alternatively, small detectors are arranged along a circle having a diameter which overlies at least a portion of the orbiting radiating element which radiates along a considerable length. This alternative array configuration also accommodates a range of display diameters. As a further alternative, to accommodate different diameter displays, the thin line detectors may be replaced with radially extending light pipes with detectors at their ends.

Abstract: The disclosed device is a marine seismic source which produces a varying FM signal often in the 10-100 Hertz region of the spectrum. The seismic source uses stiff oscillating radiators to create a signal in the water. These radiators are actuated by hydraulic cylinders which are in hydraulic communication with hydraulic or oleo-pneumatic variable devices acting as springs with a variable spring rate. Variation of the spring rate as a function of the frequency permits the device to be tuned for maximum power output.

Abstract: Apparatus is provided for adapting an analog depth sounder for the calling out of the depth at regular time intervals. In one embodiment, a self-contained adapter module is mounted to the face of the depth sounder so as to cover the depth sounder display, with the module including a transparent plate carrying a detector array and with electronics and speaker carried at the center of the array. In this embodiment, the detectors are arranged in thin radially extending lines to permit accommodation to displays of different diameter. Alternatively, small detectors are arranged along a circle having a diameter which overlies at least a portion of the orbiting radiating element which radiates along a considerable length. This alternative array configuration also accommodates a range of display diameters. As a further alternative, to accommodate different diameter displays, the thin line detectors may be replaced with radially extending light pipes with detectors at their ends.

Abstract: An electronic range expander, such as for use on a sonar system, which has a rotating disc lamp or a rectilinear pen record, of the travel time, expressed as a certain distance from the transducer to an object and back again. The received signal is sampled periodically, and these samples are stored in a random access memory, in addresses which are determined by binary numbers successively outputted from a binary counter, which is stepped in accordance with a clock signal. As the binary number representing an address in the memory is incremented, the sampled value of received signal is stored in the corresponding address. The command to write in the memory is repeated at a selected number of clock counts. Intermediate the commands to write into the memory, the command is given to read the signal stored in a selected address and to send it to a latch and to the output display or printer of the sonar apparatus.

Abstract: An echo sounder has a transducer for transmitting and receiving pulses of energy, a rotary arm display and a meter or digital display. The rotary arm is arranged to cause the transducer to transmit a pulse of energy on each occasion it passes a datum position. The motor of the rotary arm display may be switched off while simultaneously energizing an oscillator having an output frequency equal to that of the rotational speed of the motor prior to deenergization.

Abstract: Marine detection apparatus includes a sound transducer mounted below the water line of a vessel for emitting and receiving sound signals and imperviously sealed within a transducer housing together with a temperature detector for sensing the temperature of the water. A display is provided capable of displaying water depth and water temperature. The water depth reading is proportional to the elapsed time between the transmission and the reception of the sound waves, and the temperature reading is proportional to an elapsed time determined by a timing circuit in which the resistance value of the temperature sensor operates to determine the charging time of a capacitor. The display is of a circular, dial type using lighted spots and a lighted arcuate shaped column to display the depth and temperature.

Abstract: An improved slip ring and brush assembly such as for carrying the return signal pulse to a glow discharge tube on a rotating disc sonar. The rotating disc is made of insulating material and has a cylindrical hub which is adapted to fit over a corresponding hub on a motor shaft. Annular slip rings made of conductive plastic are adapted to slip over the cylindrical hub and are indexed against relative rotation by means of cylindrical bulges or projections on opposite sides of the hub. These projections serve to carry the electrical connections, in the form of threaded screws and springs that are adapted to contact the slip rings, one set for one slip ring, and the other for the other slip ring. The slip rings are separated by thin insulating washers of larger diameter than the rings. The brushes are made of graphite fibers and have excellent flexibility, conductivity and long life.

Abstract: An echo sounder has conventional transducer means for transmitting and receiving pulses of energy and display means for providing a display indicative of the period between the transmission of a pulse of energy and the receipt of an echo pulse. The echo sounder includes suppressor means defining a variable alarm window during which period alone echo pulses are passed to an alarm device. In an embodiment designed for marine applications the display means comprises a rotor arm carrying a first light emitting device connected to the transducer means and a second light emitting device energised during the alarm window. A motor is provided for rotating the rotary arm which co-operates with a scale. An alarm device responds to each echo signal occurring during the variable alarm window.