Abstract:
A gas-filled display panel includes a slotted base plate and a similar slotted face plate, each carrying an array of electrodes seated in the slots. One array comprises scanning anodes, and the other comprises display anodes. An array of apertured strip electrodes is provided between the base plate and face plate and thus between the arrays of electrodes. The strip electrodes are separated from each other by glass strips which are secured to the edges of the strip electrodes. The strip electrodes and the scanning anodes form a layer of scanning cells, and the strip electrodes and display anodes form a layer of display cells.
Abstract:
The disclosure is of a display system including a matrix of gas cells which can be ignited in different combinations to represent characters. In order to balance the change in impedance for the driving circuit represented by the different numbers of gas cells ignited at different times, a second similar matrix of gas cells is provided coupled to the driving circuit and operated as the negative of the first matrix; that is, when selected cells of the first matrix are ignited, the corresponding cells in the second matrix are held off and all others are ignited.
Abstract:
A magnetic pulse, code-generating keyboard utilizing a printed circuit board as an air core between a matrix of exciter coils plated on one surface and sensor coils plated on the opposite surface of the board having particular utility in a high frequency system. Each key of the keyboard has a shaft running through an intersection of plated coils, with a metallic plate mounted on the shaft for preventing the induction of a current from an addressed exciter coil to the sensor coil associated therewith when the key is not depressed. When the key is depressed the plate is moved away from the exciter coil thereby producing an output signal from that particular location within the matrix. The matrix locations are sequentially addressed and when a depressed key is sensed the output is fed to an associated memory or instrument decoder.
Abstract:
The disclosure is of an information display system including a display panel which comprises a plurality of gas-filled cells, each of which is operated by a pair of leads which, when properly energized, causes the gas in the cell between them to glow. After a cell is energized and the energizing signals have been removed from the leads, a sustaining signal is applied which maintains the glow. The sustaining signal is made up of spaced-apart positive and negative waves which are produced by two separate transistor and diode pairs operating a series L-C circuit made up of an inductor and panel cells. The spacing between and the two waves is controlled by the spacing between input pulses which energize the two transistor and diode pairs.
Abstract:
A multi-position character display panel includes a gas-filled envelope which contains a plurality of groups of cathode segments arrayed in a line of character positions, with a single anode electrode provided for all of the groups of segments. In each group of cathode segments, the segments are long, narrow, rectangular members arrayed in a figure ''''8'''' pattern. In addition, a group of transfer cathodes is disposed adjacent to the lower edge of each figure 8 pattern and between each such pattern for use in transferring cathode glow through each group of cathode segments and from each group of cathode segments to the next group of cathode segments. The panel is operated by energizing the anode and the first of the transfer cathodes associated with the first group of cathode segments, then energizing each of the cathode segments for the character to be displayed in the first character position as determined by the input information, then transferring back to the first transfer electrode, then to the second transfer electrode and the associated decimal point, if required, then to the third transfer electrode, and then to the first transfer electrode of the next group of cathode segments. The same cycle is repeated for the second character position and the others in the series of character positions.
Abstract:
The circuit of the invention is adapted for operation with a display device which includes a plurality of side-by-side groups of display cathode segments, each group having an anode electrode, and there being an auxiliary electrode common to all of the groups of electrodes for electrically isolating each group of display segments and preventing spurious glow between groups. In the circuit, means are provided for providing current flow to the auxiliary electrode in proportion to the total number of display cathode segments glowing at any instant.