Abstract: A line drawing method for display apparatus having memory means for storing line information including the start point and end point of any line which has been displayed on the display screen, comprising the steps of entering start point data and a line drawing instruction for a line to be displayed on the display screen, determining the end point of the line to be displayed in accordance with the entered information and stored line information, generating line information based on said determination, storing the generated information in the memory means, and displaying the generated information on the display screen.

Abstract: A data transfer control device is provided having a plurality of shift registers connected through said multiplexers in a closed loop, a selector connected to the inputs of said multiplexer and for selecting a transfer destination of display data according to a common electrode select signal of a display unit, and a gate for selecting the polarity of the display data to be loaded into said shift registers according to the polarity of common output signals for scanning common electrodes of said display unit.

Abstract: A signal-envelope display system for a digital oscilloscope includes a memory for storing minimum and maximum signal values in adjacent storage locations, an address counter for sequentially addressing the memory, and a control circuit for selectively inverting the least significant bit of the address count signal. The values retrieved from the memory are converted to analog values and a low-pass filter connects the analog values to provide a signal envelope display.

Abstract: The invention relates to a display using a varistor as the switching element for controlling the orientation of molecules forming a liquid crystal layer. It relates to providing the connections to the elementary cells on an insulating substrate and to forming on said connections varistor contact pieces ensuring a threshold control of the said cells.

Abstract: A gyroscopic navigational installation for land and sea vehicles for provng characteristics of the trajectory of the vehicle. The installation in one embodiment includes a gimbal mounted on the vehicle and pivotable about an axis. A first gyro is rotatably supported by the gimbal about a rotational axis such that a gyro azimuth sensitivity axis is orthogonal to the longitudinal axis of the vehicle and a gyro rolling sensitivity axis is parallel to the vehicle longitudinal axis. A controlled accelerometer is supported by the gimbal such that an accelerometer pitching sensitivity axis is parallel to the vehicle longitudinal axis and an accelerometer rolling sensitivity axis is parallel to the gyro rotational axis. In an installation according to another embodiment, a second gyro is mounted on the gimbal such that a pitching sensitivity axis thereof is parallel to the rotational axis of the first gyro.

Abstract: A picture display device has picture elements disposed in a line and row matrix for applying voltage to liquid crystal material to display a picture in accordance with picture signals applied thereto. The picture signals consist of gate signals sequentially applied to the picture elements along the row directions and video signals simultaneously applied to the picture elements along the line directions. A video signal detecting circuit detects the existence of the picture signals and produces a detection signal whenever the picture signals are temporarily absent for longer than a predetermined time period, and circuitry responds to the detection signal for inverting the polarity of the voltage applied to the liquid crystal material. The video signal detecting circuit may detect the presence of a horizontal or vertical synchronous signal of the video signal, or may compare the average voltage level of the video signal with a reference voltage level, to detect the presence of the picture signals.

Abstract: An ultrasonic transducer in which a plurality of elements are employed alternate ones of which are utilized as transmitters and receivers and having the same area but in which the transmitter elements are composed of material having a high transmit sensitivity while the receiver elements are composed of a material having a high receive sensitivity.

Abstract: Line patterning apparatus for use with a vector generator comprises a memory storing a plurality of addressable line pattern bit strings. Each string comprises a series of ones and zeros defining a predetermined pattern of dots and/or dashes. Associated with each pattern string is a pattern restart string defining the length of the pattern. The bits of an addressed pattern string and the associated pattern restart string are serially provided by the memory in response to an addressing counter. The bits of the pattern string are utilized for video inhibition to superimpose the pattern on a vector being generated. The bits of the pattern restart string are utilized to clear the counter when a preset restart bit is encountered in the string by the counter.

Abstract: A thin-film EL display device incorporates a MOS active matrix. Each of the MOS transistor arrays is additionally provided in parallel with a Zener diode for the purpose of protecting the device from a high voltage. This Zener diode has a breakdown voltage characteristic corresponding to a difference between a luminous voltage and a non-luminous voltage of an EL display element and clamps the voltage across the MOS transistor, in the "OFF" state, to a voltage less than or equal to non-recoverable breakdown voltage.

Abstract: A method of utilizing a memory device for a display device which comprises a parallel combination of an image and a control memory connected to a decoder. At each of addresses assigned to form a color signal, the image memory stores a byte including bits corresponding to green pieces of color information alternating with bits corresponding to red pieces of color information; the control memory stores a byte including four consecutive bits corresponding to blue pieces of color information. The decoder combines associated triads of the red, green and blue bits to form a color signal for a display indicating device.

Abstract: A fluid pressure transducer of the null balance type in which a fluid whose pressure is being sensed acts against one face of a diaphragm and a balancing control fluid acts against the opposite face. Control fluid pressure is uniformly distributed against the control face of the diaphragm by a porous element, preferably made of a sintered material. Movement or displacement of the diaphragm opens a sensing element and may be controlled by use of a similar pressure distributing porous element placed on the sensing side. The volume defined between the two porous elements limits maximum diaphragm travel and displacement. Transducers made according to the invention have high sensitivity. The transducers are particularly well adapted for measurement of pore pressure in earth fills or natural geological environments.

Abstract: A liquid crystal display is provided with elements arranged in matrix form and addressed by timing scanning and signal pulses so as to select particular display elements. According to input data, the display is made to move while maintaining its shape so that an analog of a mechanical system such as a dial or gauge having a movable pointer may be obtained.

Abstract: A three dimensional visual effect of rotating mechanical reels is given to a two dimensional display on a video screen by using a film having a continuous tone gradient from dark to light, the darkest portions extending along the upper and lower edges of the film, respectively, with the lightest adjacent the center of the film. The film is placed over the video screen images so that the darkened tone gradients of the film are over the upper and lower portion of the display, and the lighter portion of the film at the center is over the center of the display.

Abstract: A waveguide is provided, particularly for use in acoustic emission applications involving a hostile environment, comprised of a member selected from the group consisting of aluminum oxide and beryllium oxide. The waveguide is solid in form, and varies in length depending upon the specific application or use of the waveguide and the frequency of the signal. Size varies inversely to frequency levels. The cross sectional dimension will vary depending upon application, and will generally conform to the size of the crystal sensor element being utilized in a particular application.

Abstract: A flat panel display system for use with AC plasma panels in which addressing signals for an AC plasma panel display line is taken from a voltage divider comprised of two photoresistors, a coupling photoresistor and a decoupling photoresistor. Addressing pulses are coupled to the coupling photoresistor and sustaining voltage signals are coupled to the AC line via a capacitor which shunts the decoupling photoresistor. The coupling and decoupling photoresistors are illuminated in turn. The decoupling photoresistors, will upon illumination accelerate the decay of voltages appearing across the coupling photoresistor and on the AC plasma panel display line.

Abstract: Sampling data output in the form of digital signals corresponding to changes in a quantity to be measured within a predetermined period or an average value of the sampling data is compared with display data corresponding to the current display. When the accumulation signal obtained by accumulation of the difference between the sampling data and display data exceeds a predetermined value, or an average value having a predetermined difference from the current display data has been counted a predetermined times, the display data is updated.

Abstract: A dynamic pressure comparator for calibrating high frequency pressure transducers used for the measurement of rocket motor combustion instability and other transient phenomena includes an acoustic cylindrical cavity through which a jet stream of nitrogen is passed and at each of the opposite ends of which a transducer carrier is provided. Vortex systems and turbulence created as the jet enters and exits the cavity stimulate pressure transducers that are mounted in the carriers. The outputs of the transducers are monitored and compared as by the use of a spectrum analyzer. The comparator includes adjustments to vary the high frequency stimulus and the cavity pressure, and facilitates simulation of transducer installation in a given pressure measurement application, for example, on a rocket motor.

Abstract: Apparatus for measuring the bulk density and mass flow rate of pulverized coal entrained in air along a duct 6 comprises beta radiation source means 7, radiation detection means 8 and a shield 9 to intercept direct radiation falling on the detector means which thereby measures the diffuse radiation scattered by the coal particles. That measurement plus a signal indicating linear coal particle speed is fed to a data processor which calculates the bulk density and mass flow rate.

Abstract: A visual communication device for displaying combinations of written words which are entered by manipulation of an efficiently organized keyboard. The keyboard has certain keys specifically dedicated to a set of the words recurring most frequently in common conversational language as well as keys corresponding to discrete letters of the alphabet for spelling less-frequently used words.The keyboard is backed up by an extensive list of common terms stored in a memory. Each word is automatically fetched from the memory and displayed on a multi-digit alpha-numerical readout as soon as a number of leading characters sufficient to identify the word has been entered; thus, dispensing the operator from keying the remaining characters. In this first version, the device can be used by a person with auditory or vocal disability to quickly enter phrases in the readout by a much lesser number of manipulations than would be required if each word had to be spelled one letter at a time on the keyboard.

Abstract: Digital information is usually displayed as a set of pixels which are arranged according to a line pattern within a two-dimensional area. For the storage of the information to be displayed, use is normally made of a picture memory. The content of an information pixel is stored in the memory as m bits (m>1). When use is made of a color map memory, the information can be displayed in different colors to be selected by a user. Selective display of the information is also possible, which means that only a selected number of the m bits are displayed. The invention provides a device for the display of digital information which enables selective display. In order to realize selective display, a device in accordance with the invention comprises a gate circuit with a control input on at least one connection between the display memory and the color map memory. Selective display in the form of picture pages and resolution enhancement is made possible by selected control signals on said control input.