Showing papers on "Electrode array published in 1972"

Voltage induced optical waveguide means

Abstract: The increase of the refractive index in one or more localized regions defined by spaced electrodes on a surface of an electro-optic crystal, in response to a voltage across the electrodes, provides voltage-induced optical waveguide means. By controlling the voltage and/or the configuration of the electrodes, complex optical translating systems can readily be constructed.

Input circuits for charged-coupled circuits

Abstract: An input circuit for a charge-coupled circuit includes a source electrode in the substrate and a gate electrode spaced from the substrate located between the source electrode and a storage electrode. The amount of surface charge signal which becomes stored beneath the storage electrode may be controlled by controlling the source electrode voltage while the gate electrode is at a sufficiently high voltage level to form a low impedance conduction channel in the substrate. The time at which this charge signal transfers to the surface of the substrate beneath the storage electrode may be controlled by controlling the timing of the application of the voltage to the control electrode.

Flow Conditioning in Electric Discharge Convection Lasers

Abstract: Electrical power deposition in both open and closed cycle CO2 electric discharge convection lasers (EDCL) can be enhanced by controlling the velocity profile in and introducing turbulence into the discharge zone. For the multiple pin electrode geometries typically employed in rectangular cross section laser channels, this can be accomplished by an array of adjustable baffles which span the flow upstream of the discharge region. Typically four baffles, whose chord is one‐quarter of the channel height, are employed. Each baffle is individually adjustable to compensate for the nonuniform flow impedance of the electrode array. Measurements of electrical power deposition in both open and closed cycle operation and results of hot wire anemometer studies are presented.

Apparatus for treatment with sum currents

Abstract: An apparatus for producing interference and beat-currents in a selectable point of the body, particularly for electrotherapy on the human body, which comprises at least two pairs of electrodes adapted to be applied to the human body. Each of the pairs of electrodes has associated therewith an output amplifier. The latter supplies independently selectively pulse and alternating current for each pair of the electrodes. A voltage proportional in amplitude to the current flowing through the patient is taken. The voltage relates mathematically each individual setting voltage with a common setting and is subtracted. The difference voltage is produced separately for each circuit and used for the amplification control on the corresponding of the amplifiers, and the voltage is so polarized that an increase in patient current resulting in a decrease of the amplification and an increase in the joint voltage resulting in an increase of the amplification.

Device for converting an input voltage into an output current or vice versa

Abstract: Device for the distortion-free conversion of a signal voltage into a signal current or vice versa which comprises an input transistor having two main electrodes. A high-resistance current supply source is included between the first main electrode and a supply point, while this main electrode is also connected via a current feedback path to the control electrode of a first transistor the main current path of which is connected in the circuit between the second main electrode of the input transistor and another supply point, the output of the device being a point of the latter circuit.

Method of ultra long spaced electric logging of a well bore to detect horizontally disposed geologically anomalous bodies in the vicinity of massive vertically disposed geologically anomalous bodies lateral to and not intercepted by the well bore

Abstract: An electrode array comprising a current source electrode, two potential electrodes and a sink electrode is used in a well bore to detect horizontally disposed electrically resistive geologically anomalous bodies that are not cut by the well bore when they lie in the vicinity of massive vertically disposed electrically resistive geologically anomalous bodies. Potential detecting electrodes in the array are spaced at nearly equal distances from said current source electrode; one is placed above and one is placed beneath said current source electrode. Resistivity data obtained from said electrode array is compared with short-spaced resistivity data obtained by other means. Differences in the compared data indicate the presence of horizontally disposed electrically resistive geological anomalies lateral to and uncut by the well bore since said electrode array is unresponsive to the presence of the massive vertically disposed electrically resistive geological anomaly.

Electrographic recording system

Abstract: Recording electrodes of a coincidence voltage type electrographic recorder are divided into arrays. Like-numbered electrodes of different arrays are connected together. Complementary electrodes are disposed adjacent to the arrays. A latent image is formed at a selected recording electrode when suitable voltage is applied to that electrode, and in coincidence therewith, suitable voltage is applied to one or more complementary electrodes adjacent to the array containing the selected recording electrode. Uniform potential is obtained at the conductive layer along the full length of the array at which recording is taking place by having the complementary electrodes longer than the array and extending beyond both ends of the array. For this purpose, the complimentary electrodes may be longer than the array, or they may have a shorter length and be selectively connected in groups to act as long electrodes.

Shrimp fishing apparatus

Abstract: An apparatus for daylight shrimp fishing is disclosed. The apparatus includes a plurality of Otter trawls each having an electrode array and a pulse circuit. Each pulse circuit includes a capacitor which is discharged by a reversal of current to the capacitor which fires an SCR. A control unit located on the boat effects the discharging of the respective capacitors in a predetermined sequence to equalize the load on an alternating current generator. The electrode array has a plurality of electrodes which trail behind a bus extending between the trawl doors at a distance above the bottom. The electrodes are weighted to slide along the bottom and have an insulating material disposed above the conductor so that the electric current pulses are directed into the bottom rather than being dissipated upwardly into the water. The design of the bus and the electrode array is such as to insure uniform current density over the array.

Cold cathode discharge display apparatus

Abstract: A cold cathode discharge display apparatus in which a main electrode whose anode consists of a plurality of electrodes while whose cathode is of a plate having a plurality of perforations for discharge space, and a trigger electrode are provided the trigger electrode consisting of a first electrode group for column and a second electrode group for raw, whereby in the display or write operation, a voltage lower than firing voltage but higher than a voltage for sustaining a discharge is applied between the main electrodes and at the same time a drive voltage is applied between the trigger electrodes while in the read-out operation, a voltage lower than firing voltage but higher than the voltage for sustaining the discharge is applied between the trigger electrodes.

Display device and method of making the same

Abstract: A method of making a display device having steps of forming a first electrode array including a plurality of electrodes, forming an insulating layer on the first electrode array, forming a second electrode array including a plurality of electrodes so as to cross the first electrode array, and forming apertures corresponding to cross-points of the plurality of electrodes of the first and second electrode arrays to be filled with an ionizable gas therein. A display device having selecting electrode plates in addition to the first and second electrode arrays and apertures formed therethrough.

Baffle for perforated electrode in a crossed-field switch device

Abstract: In the nonconducting state, breakdown between concentric electrodes is determined by the Paschen law. If the inner electrode which defines the interelectrode space is perforated, ionization can occur therein, thus reducing holdoff voltage at a given pressure. Path length-limiting shielding adjacent to the electrode perforations prevents ionization within the electrode to maintain holdoff voltage, corresponding to the original electrode spacing.

High-pressure gaseous discharge lamp including a starting electrode

Abstract: Ignition of the arc between the main electrodes of a high-pressure gaseous discharge lamp is achieved by placing an integral thermionic starting electrode adjacent one of the main electrodes and then concurrently heating the starting electrode and applying a low-voltage starting voltage to the starting electrode and the adjacent main electrode. After the resulting auxiliary arc has heated the adjacent main electrode, the operating voltage is applied across the main electrodes and the starting voltage is terminated, thus causing the arc to shift from the thermionic electrode to the other main electrode. The starting electrode is heated electrically by connecting it to an external power source through a pair of leads sealed through the lamp envelope.

Cathode-ray tube driving system

Abstract: A system for driving a cathode-ray tube in a television receiver or the like comprising means for generating an output voltage variable depending on the variation of beam current, means for combining the output voltage of the generating means with a voltage obtained by reducing the high voltage applied to the cathode-ray tube, and means for applying the resultant voltage to the focusing electrode of the cathode-ray tube. Thus, with the increase in the beam current, the voltage applied to the focusing electrode is reduced at a greater rate than the rate of reduction of the high voltage applied to the anode of the cathode-ray tube so that the televised picture can be satisfactorily reproduced.

Switching circuit for pulsing the control-current of a hall generator

Abstract: A switching circuit for pulsing the control-current of a Hall generator has a switching component with two current electrodes and a control electrode as well as a Hall generator with two control-current electrodes and two voltage electrodes. One of the control-current electrodes is connected to one of the current electrodes of the switching component. A capacitor is connected between the other of the control-current electrodes and the other of the current electrodes of said switching components, whereby the capacitor discharges through the Hall generator via the two control-current electrodes and through the switching means via the two current electrodes when the switching means is turned on. A resistor has two terminals and one of the terminals is connected to the other of the current electrodes of the switching component. One of the voltage electrodes of the Hall generator and the other of the terminals of the resistor are adapted for connection to an energy source, whereby the capacitor is charged through the resistor and the impedance of the Hall generator between the other control-current electrode and the one voltage electrode.