Abstract: A compact photoflash unit is provided for arranging more lamps in a given volume while maintaining performance requirements. Two parallel columns of horizontally disposed lamps are mounted in a planar array with the lamps of one column staggered with respect to the other with the bases interdigitated. A multiple reflector system for the lamps comprises a pair of adjacent strip-like reflector panels each having a column of side-by-side reflector cavities aligned with an associated column of lamps, the cavities of one panel being staggered with respect to the cavities of the other. Each panel is fore-shortened with respect to its associated lamps and covers the lead-in wires and bases of the lamps associated with the adjacent panel.

Abstract: A noise-immune master timing generator operable to produce timing signals synchronized with external reference signals and to maintain phase synchronization even in a noise environment. First and second gate signals of different time duration are derived from a counter chain of the master timing generator and examined with respect to the time of occurrence of an external reference signal.If the reference signal is within the first gate signal, as occurs during normal, noise-free conditions, there is no adjustment of the counting chain to resynchronize the counting chain to the reference signal.

Abstract: A fluorescent lamp has an extension base at one end thereof which contains an impedance to reduce current flow through the lamp. The length of the lamp plus extension base equals the length of a standard fluorescent lamp.

Abstract: A microwave diplexer apparatus for handling simultaneously two independent polarized transmitted signals at one frequency and two independent polarized received signals at a lower frequency. In the transmit mode of operation of the diplexer apparatus, a pair of input signals to be transmitted to a target are applied to a first orthogonal mode transducer wherein the electric fields of the signals are established at right angles to each other. The orthogonal linearly-polarized signals are then transformed by a pin/ridge-loaded circular polarizer device to oppositely-rotating circularly-polarized signals and coupled via an antenna port of a second orthogonal mode transducer to an antenna for transmission to the desired target.

Abstract: Rare earth activated rare earth fluorogermanates, represented by the formula: [R.sub.1.sbsb.x R.sub.2.sbsb.(1-x) ].sub.a F.sub.b GeO.sub.C wherein x is a value from about 0.9 to about 0.9998, a is a value of from about 2 to about 4, b is from about 0.85 to about 3.15, c is from about 4 to about 7.5 R.sub.1 is selected from the group of Y, Gd and La and R.sub.2 is selected from Eu, Gd, Tb and Pr and R.sub.1 and R.sub.2 are different, are excited by long or short wavelength ultraviolet light. A solid state process for using a blend of the metal oxides and a heat-decomposable fluorine compound is disclosed along with a preferred embodiment wherein the dual rare earth oxide is formed prior to forming the aforementioned blend of metal oxides.

Abstract: A flashlamp signal device which includes an illumination means for providing a prolonged, visible signal after actuation of each of the device's flashlamps. The illumination means may be in the form of a phosphor coating within the device or on an adjacent, movable panel, or the phosphor may be impregnated within the light-transmitting housing or support structure of the device.

Abstract: A vertical deflection amplifier includes a preamplifier having an input at which is applied a DC feedback signal for the stabilization of the amplifier's DC output. In order to assure an undistorted or unattenuated vertical deflection upon initial turn-on of the receiver, a fast-start circuit superimposes a transient voltage on the DC feedback signal. The fast-start circuit allows the amplifier's output to reach its quiescent DC output level in a period of time that is substantially shorter than the time constant of a sampling network from which the DC feedback signal is derived.

Abstract: Modular multiplex/demultiplex apparatus suitable for use in a telephone communication system for processing data transmitted between local and remote telephone subscribers. The multiplex/demultiplex apparatus comprises a plurality of module units which may be interconnected together, for example, in one or more groups, for processing and routing data originating with local subscriber equipment to selected ones of a plurality of trunk group modules and associated modems for transmission to remote subscriber equipment, and for processing and routing data received by the trunk group modules and modems from remote subscriber equipment. Each module unit includes a shift register having a plurality of demultiplex input lines for receiving demultiplexed data thereon and a series input for receiving multiplexed data. Data present on the demultiplex input lines or at the series input is shifted to an output of the shift register.

Abstract: Modular multiplex/demultiplex apparatus suitable for use in a telephone communication system for processing data transmitted between local and remote telephone subscribers. The multiplex/demultiplex apparatus comprises a plurality of module units which may be interconnected together, for example, in one or more groups, for processing and routing data originating with local subscriber equipment to selected ones of a plurality of trunk group modules and associated modems for transmission to remote subscriber equipment, and for processing and routing data received by the trunk group modules and modems from remote subscriber equipment. Each module unit includes a shift register for receiving and shifting therealong a multiplexed signal received from a selected one of the trunk group modules. A counter counts the bits shifted along the shift register and when the shift register is full it produces an output count signal.

Abstract: Improvement is provided in a color cathode ray tube of the post-deflection acceleration type, in the form of an operational system including related tube geometry. An electron barrier, consisting of a metallic film having a defined voltage penetration threshold, is adheringly disposed on the surface of the screen. The potential on the screen is in the order of substantially 20 to 40 kilovolts while the potential of the related color-selection electrode is more than substantially 72 percent and less than 85 percent of the screen potential thereby effecting a definitive voltage differential (.DELTA.V) therebetween that is substantially equal to or less than the voltage penetration threshold of the metallic film. The improvement in the system provides enhanced contrast and color purity in the screen display and minimizes background luminescence of the screen resultant from spurious impingement of secondary electrons generated in the tube.

Abstract: An essential user bypass circuit for use in switch units of a telephone switching system. Telephone subscribers at each switch unit are able to communicate with each other and with subscribers at other switch units via associated subscriber apparatus and trunk group lines interconnecting the switch units. All call processing operations, including the formation of "from-to" address signals for connecting subscribers with each other and with trunk group lines, are normally controlled by a processor unit (containing dual processors) at each switch unit.

Abstract: Several means are described for providing an electrical coupling path through a protective, insulative layer, e.g. cellulose acetate, located on an electrically activated flash lamp envelope. The function of the path is to interconnect a thin conductive coating positioned on the envelope's external surface under the insulative layer with an electrical contact located externally of the flash lamp and adapted for igniting the lamp.

Abstract: A high intensity arc discharge lamp comprises an arc tube having tungsten electrodes at each end and containing a fill including mercury, a starting gas and a metal in the form of metal halide. The tungsten electrode also contains a small quantity of said metal in solid solution with the tungsten.

Abstract: An elongated flash lamp assembly which is sequentially advanced through a camera to permit each of the lamps within the assembly to become aligned with the camera's fixed reflector. Several heat-responsive (e.g. fusible) covers are located on the assembly's housing to permit the above advancement only after each cover has become physically deformed by the heat from the respective flash lamp located adjacent thereto. A mechanism for advancing the assembly is also disclosed.

Abstract: A glass-to-metal seal for an electrochemical cell terminal includes a formed apertured plate and a tack-shaped terminal pin. The formed apertured plate has a relief ring of concavo-convex configuration and the terminal pin has the vertical section thereof within the aperture and the horizontal section spaced away from the plate. A glass seal is formed between the relief ring and about the terminal pin, including the space between the horizontal section and the plate by the application of heat and pressure within a carbon mold.

Abstract: Electronic ballast apparatus includes a transformer having an "E"-shaped core member with a primary winding wrapped on a center leg member and coupled to a potential source and first and second secondary windings each wrapped on a first and second outer leg member of the core member and coupled to gaseous discharge lamps such that flux developed in the primary winding is differentially divided between the first and second secondary windings in inverse relation to energization of the gaseous discharge lamps.

Abstract: There is described an improved apparatus for producing filaments from a high melting point material by forming a pendant drop at the end of the material and engaging the drop with a rotating heat extracting member (e.g. copper disc). The improvement to the apparatus comprises a pair of heating components to heat the material to a temperature immediately below its melting point and thereafter heat only the end of the material to the melting point. The result is a vibration free pendant drop suspended from the rod's end. A method for making the filament is also described.

Abstract: A protective cap is provided for a cathode ray tube-base assembly. The cap incorporates discrete means for maintaining alignment and protection of an array of tube pins at least one is spatially encompassed within a tubular isolation structure of the base.

Abstract: A rapid start fluorescent lamp contains a circuit opening device on the cathode mount which opens a short time after lamp starting and stops heater current flow to the cathode. The circuit opening device is a thermostatic element in a sealed glass tube. Additional support is provided for the cathode end that is connected to the circuit opening device in order to prevent damage from vibration.