Abstract: An x-ray radiation stabilization system is provided including an x-ray tube (20) which emits x-ray radiation (22). The x-ray tube (20) has an anode (52), a cathode (50), and a vacuum envelope (54) which houses the anode (52) and the cathode (50). A high-voltage generator (40) is connected to the x-ray tube (20). It supplies a high-voltage electric potential between the cathode (50) and anode (52) such that an electron beam flows therebetween. The electron beam strikes the anode (52) producing the x-ray radiation (22). A reference radiation detector (60) samples a representative portion of the x-ray radiation (22) emitted by the x-ray tube (20) and generates an error signal in response to an intensity of the sampled x-ray radiation (22). A feedback circuit (80) is connected between the reference radiation detector (60) and the high-voltage generator (40).
Abstract: A sample (16) with a cut (18) is mounted by clamps (14) between a stationary bar (10) and a movable bar (12). A motor driven cam (22) reciprocates the movable bar causing the samples to undergo cyclic deformation. A camera (C) is selectively positionable (B) to view each of the plurality of samples. A computer control (D) determines a cut length (60, 62, 64, 66) from each two dimensional electronic video image representation and stores it in a cut data memory (68). The next sampling time for each sample is calculated (72) generally in proportion to an inverse of the cut growth rate. The sampling order is re-ordered after each measurement and stored in a queuing table (78). A driver circuit (86) causes a motor (40) to position the camera in the appropriate positions to image the samples in the order indicated by the queuing table.
Abstract: A hermetically sealed, electrically insulative enclosure (A) is surrounded by a Faraday cage (B). At least one electrode (C) is disposed within the hermetically sealed enclosure. The volume of the enclosure is selectively altered such that an initial charge density in the neighborhood of electrod changes, which changes the electrode potential. The change causes a current to flow to or from the electrode which returns the electrode potential and the electrode surrounding space charge toward an equilibrium condition. In one embodiment, a current measuring circuit (D) is disposed between the electrode and the Faraday cage to derive a measure of the current flow therebetween. In another embodiment, a like electrode is disposed within another hermetically, sealed insulative enclosure which is shielded by the same or another Faraday cage. In the second embodiment, the measuring circuit measures the current flow between the two isolated electrodes.
Abstract: A pellet feeder (A) feeds pellets of vulcanized rubber or other materials and water or another fluid at controlled rates into a mixing tank (30). An agitator (32) mixes the pellets and fluid into a slurry. The slurry is pumped from the mixing tank to a mill (C) by a pump (34). The mill has a receiving region (70) defined between a stator (48) and a rotor (68) for receiving the slurry. The stator and rotor define a peripheral grinding zone (72) around the slurry receiving region. An impeller (74) has vanes which extend from the upper surface of the rotor to an abrasive surface (82) of the stator such that the impeller vanes are ground at the same rate as the stator and rotor wear to maintain a fluid seal around the impeller blades. Fluid cylinders (50, 52) maintain a constant pressure between the stator and rotor. The stator has a plurality of recesses (86, 86') which preferably have downstream extending relief areas (214).
July 3, 1984
Date of Patent:
August 20, 1985
The Goodyear Tire & Rubber Company
Ronald L. Brubaker, James J. Tloczysnki, Melvin Budzol, Clifford J. Ahola, Frederick P. Boyle, Truman D. Parkinson, James C. Rine
Abstract: The electrogasdynamic coating system includes an electrogasdynamic gun for charging material particles indirectly. The gun has a gas inlet which receives from a gas source a pressurized gas in which an condensable vapor is entrained. Corona and attractor electrodes are disposed in communication with the gas inlet for ionizing the ionizable vapor. A dielectric tube extends from the electrodes downstream to a mixing chamber. A first fluid material inlet is connected with a first source of powder or liquid material and a second fluid material inlet is connected with a second source of powder or liquid material. The first and second fluid material inlets are connected with the mixing chamber such that particles of the first and second fluid materials are mixed with the gas and vapor. The vapor condenses and coats the particles during mixing causing them to become charged. In use, a condensable vapor is entrained into a gas flow, the gas flow is passed across corona and attractor electrodes to ionize the vapor.
Abstract: In accordance with the present invention there is provided an electrographic recording apparatus for recording on an electrostatic charge retentive record medium and a driver circuit suitable for use therein. The apparatus comprises a plurality of recording electrodes mounted in close proximity to the record medium. A plurality of complementary electrodes are mounted in electrical cooperative relationship with the recording electrodes. Improved driver circuits are provided for applying a voltage to the electrodes. The driver comprises a current branch to which the electrode is connected. A current control is provided for supplying a current through the current branch, which current biases diodes to force the electrode to a reference potential. The current further charges an electrical storage element. To apply a high voltage to an electrode, the current control blocks the current flow. The potential stored in the storage element which causes a base-emitter current flow to forward bias the transistor.
Abstract: In a system for producing a display in an x,y coordinate system which system produces only a single display point for each display position on the x-axis, a circuit for producing rise lines and fall lines parallel to the y-axis to connect the display points in adjacent positions on the x-axis. The circuit includes a shift register for storing a line of data, a shift register for storing rise line positions, a shift register for storing fall line positions, and AND gates for terminating rise lines and fall lines upon reaching a display in an adjacent position on the x-axis.
Abstract: A circuit for interpolating discrete data points or horizontal line segments of a single valued function in one direction into a continuous line display. So that only one value need be produced from a memory for each display position along one axis of an x,y coordinate system display, the circuit generates lines parallel to the other axis which connect the display at adjacent positions along the first axis. The circuit receives and displays a line of data; delays the line of data by one clock pulse and displays the delayed line; compares the line and delayed line to determine the ends of data in the line; stores the position of the ends of data in a shift register; displays the output of the shift register; and returns the output of the shift register to the input of the shift register for each end position until data is received in a position adjacent the end position.
Abstract: A capacitive gauging apparatus in which a single central processing unit is connected to a plurality of gauging heads each gauging head having a further plurality of gauging probes. The system then multiplexes the probes and heads to enable the central processing unit to receive serially the output from each of the heads and produce an analog or digital signal which indicates distance between each of the probes and the work piece. A central microprocessor transforms these signals into an output for visual display or calculates the difference between these signals and an ideal master work piece. Further, a highly temperature stable, low capacitance, high impedance amplifier is used in conjunction with each of the probes so that the output signal from each of the probes is stable and accurate over a wide range of conditions.
Abstract: An electrographic writing system including an electrographic writing head operatively connected to a switching system is disclosed. The electrographic writing head includes a plurality of electrically conducting styluses arranged to produce an electrostatic charge on a record medium which is normally dielectric coated paper. The styluses are supported by an insulating material, and one of the ends of each of the styluses is either substantially flush with one end of the writing head or slightly recessed. The other ends of the styluses act as part of a connecting means to the switching system. The switching system includes a plurality of diode assemblies. Each diode assembly has a sequence of diode switching circuits including a first high stored charge or slow diode, a second low stored charge or fast diode in series therewith and a capacitor. The capacitor has one end connected between the diodes and the other end to ground or a dynamic voltage.
January 10, 1977
Date of Patent:
September 19, 1978
Arling Dix Brown, Jr., Edward Justus Reilly