Abstract: A current collector is used with an elongated, generally closed rail having a slot extending the length thereof and plural power conducting strips disposed within and extending the length of the rail, with the current collector providing power to a mobile machine. The current collector includes a wagon disposed within the rail and having plural sliding contact brushes each engaging a respective power conducting strip within the rail. An electrical connector and cable leads are connected to the wagon for coupling the sliding contact brushes to the mobile machine for powering the mobile machine. The wagon moves on first and second wheel assemblies which are detachably connected to respective forward and aft portions of the wagon and which travel over inner portions of the closed rail.

Abstract: In an Internet protocol (IP)-based multimedia system having a voice over packet infrastructure call handling involves the execution of a call processing program that controls state transitions in a finite state machine termed the “call model.” These transitions are representative of the events that occur during the lifetime of the call and result in the execution of pre-defined actions. In order to provide high level Intelligent Network (IN) capabilities to IP end-point subscribers, a call model layer implements the IN call model, but is closely integrated with the IP-based, multimedia call model that runs within the base platform. The integration employs a precisely defined state-level map between states in the IN call model and the corresponding states in the base call model. The IN call model layer is thus able to support access to IN components to permit the existing base of IN services to be easily accessed and to permit the base layer to support client-level interaction and event handling.

Abstract: A single layer optical coupler pad is disposed between and in intimate contact with the window of a cathode ray tube (CRT) and a multi-lens assembly for transmitting a video image on the CRT's window to the lens assembly for display on the screen of a projection television receiver. The optical coupler pad has a refractive index closely matching those of the CRT window and lenses and high compressibility to allow for tight-fitting lens-CRT mounting without damage to either. The single layer configuration of the optical coupler pad allows it to be produced at low cost, simplifies its installation during projection television receiver CRT/lens assembly and its removal and retrofitting following television receiver repair, and eliminates the possibility of fluid leakage under extreme environmental conditions. The optical coupler is comprised of a unique combination of first and second resins and first and second catalysts to yield a durable, yet pliable, transparent sheet which is dry and easily handled.

Abstract: A heat sink positioned on a printed circuit (PC) board includes a generally planar center portion and first and second pluralities of spaced planar ribs extending generally transversely from respective lateral edges of the center portion. The heat sink is adapted for generally perpendicular mounting on the PC board and includes first, second and third mounting tabs respectively extending from the lower edges of the bottom lateral ribs of the first and second pluralities of lateral ribs as well as from the lower edge of the planar center portion. Each mounting tab is adapted for insertion within a respective aperture in the PC board and includes an elongated proximal portion and a distal end portion.

Abstract: First and second walking beams are coupled by a proportional displacement arrangement to a reciprocating drive mechanism. Respective ends of the first and second walking beams are positioned in close proximity to one another to permit an article positioned on the first walking beam to be transferred to the second walking beam. The first walking beam has a close or narrow pitch between adjacent article-bearing slots thereon, while the second walking beam has a wide pitch. Inter-article spacing on the second walking beam is thus greater than the spacing between adjacent articles on the first walking beam. This arrangement permits a large number of closely spaced articles to be simultaneously deposited upon the first walking beam while standard spacing may be provided between the articles on the second walking beam for improved efficiency in the automatic positioning and handling of the articles.

Abstract: In a color cathode ray tube (CRT) having three electron beams each incident upon a respective primary color phosphor dot of red, green or blue, wherein the color dots are arranged in spaced, periodic groups of three dots, color purity which is determined by the accuracy with which each electron beam impacts its associated phosphor dots is measured by an adaptive process which measures six electron beam deflection vectors from which a beam landing calibration vector may be determined to correct for electron beam misalignment. After measuring beam landing error for each of the three electron beams, the center electron beam is deflected either right or left as determined by its previously measured beam landing error to the nearer of the two remaining dots. The electron beam associated with the remaining dot is then laterally displaced to the center dot.

Abstract: A computer controlled system for measuring convergence in a multi-electron beam color cathode ray tube (CRT) provides a high speed coarse search and fine search sequence for locating the position of incidence of the electron beams on the CRT's faceplate. The coarse search involves a binary, step-wise procedure wherein a first half of the CRT's faceplate is illuminated by the electron beams with the remaining half of the faceplate then subjected to a divide-by-two binary search procedure which continues with the remaining CRT area halved at each subsequent step until resolution of electron beam position is determined to within approximately 2 horizontal and vertical lines by a photodetector whereupon the fine search procedure is automatically initiated. The fine search procedure involves the electronic position stepping of line images upon a quadrant type or otherwise split photodetector.

Abstract: A grounded capacitor in a switched-mode power supply provides AC line EMI filtering, reduced current leakage, and high voltage isolation. The capacitor is coupled between an AC rectifier circuit and the controlled switching devices of the power supply to provide the capacitor with a lower conduction angle, i.e., the grounded capacitor will only conduct a leakage current during periods when diodes within the rectifier circuit are conducting. The low impedance ground return path for the switching device output signal permits the use of a filter capacitor having a large capacitance which affords improved power supply line isolation and enhanced safety.

Abstract: Magnetic field formers in a cathode ray tube (CRT) deflection yoke for controlling the position of an electron beam in the CRT are secured to and maintained in position on the yoke by means of a foamed hot melt adhesive. An inert gas such as nitrogen or carbon dioxide is introduced in a volumetrically metered manner into a hot melt adhesive which may be polyethylene, polypropylene or any number of other thermoplastics to form a foamed adhesive containing a large volume of gas bubbles. The foamed hot melt fluid is then deposited between the magnetic field formers and various other portions of the deflection yoke to provide magnetic field former support and yoke strength, eliminate deflection yoke hot spots, dampen out yoke vibration modes, and reduce the cost of the deflection yoke.

Abstract: Apparatus and method are disclosed for use in the manufacture of a color cathode ray picture tube, the apparatus providing for inserting a shadow mask into the face panel of the tube. Means are disclosed for seeking the apertures of the leaf-type springs extending from the frame and locating the axes of the apertures and locking the apertures at predetermined points in a first substantially horizontal plane. The stud-locating means include V-groove tip means for locating, positioning and cradling the studs in the second plane with the axes of the studs in approximate vertical alignment with the predetermined points. Elevator means provide for raising the mask to an upper assembly position to translate the planes into approximate coplanarity, and bring the axes of the apertures into approximate coincidence with the axes of the studs before release of the springs.

Abstract: A support base for a display monitor provides for the rotation and stable orientation of the monitor over a range of tilt angles. An upper portion of the base is adapted to receive a turntable having an upper concave surface adapted to receive a complementary convex lower portion of the display monitor's cabinet. The concave surface of the turntable includes a first pair of spaced guide rails adapted to receive and engage respective complementary guide rail assemblies positioned on the convex lower portion of the monitor. The convex lower portion of the cabinet is further provided with a pair of spaced projections for insertion within respective elongated apertures in the turntable which are parallel to and in spaced relation with its guide rails.

Abstract: An electron beam deflection yoke for use in a cathode ray tube (CRT) includes a plastic housing within which are symmetrically positioned a pair of horizontal coils and on the outside of which are symmetrically mounted a pair of vertical coils wound on respective halves of a cracked ferrite core. Integral with and on the outside of the housing, or yoke liner, are two pairs of flexible members, or ribs, aligned with the longitudinal axis of the housing, positioned 180.degree. from each other around the circular circumference of the housing, and adapted to engage an inner surface of a respective one-half ferrite core between the coil windings thereon. The flexible ribs are adapted to receive core elements having a wide range of thicknesses and inner dimensions and to maintain the one-half ferrite cores, which are coupled together and held in position by resilient clips, concentric relative to the longitudinal axis of the housing.

Abstract: A support base for a display monitor provides for the stable orientation of the monitor over a range of tilt angles. An upper portion of the base includes a concave surface adapted to receive a complementary convex lower portion of the display monitor's cabinet. The concave surface of the base includes a pair of spaced, upraised, parallel, elongated, lateral guide rails adapted to receive and engage respective guide rail assemblies positioned on the convex lower portion of the monitor. The convex lower portion of the cabinet is further provided with a center projection for insertion within an elongated center aperture in the concave support surface positioned between the paired guide rails. The center projection is coupled to the base by means of a stretchable element such as an extension spring for applying a moment to the monitor tending to rotate it in a first direction within the concave surface.

Abstract: An improved metal detecting device of the beat frequency oscillator type is provided which incorporates a method for determining the side of the zero beat frequency at which a search oscillator is operating. The device includes a search coil conveniently mounted which is part of a search oscillator. A reference oscillator is also provided, the output of which is digitally compared to that of the search oscillator by a digital phase comparator. The digital phase comparator output is applied through a low pass filter to a slope detector circuit. The slope detector output signal is supplied to both an audio output circuit and a filter/comparator. The audio output is sufficient to facilitate location of permeable and conductive substances. The output of the slope detector also contains information which is extracted by the filter/comparator and translated to an audible signal by an oscillator and the audio output circuit.

Abstract: The use of a coaxial plasma gun to produce a plasma ring which is directed into a magnetic field so as to form a field-reversed plasma confined in a magnetic mirror. Plasma thus produced may be used as a target for subsequent neutral beam injection or other similarly produced and projected plasma rings or for direct fusion energy release in a pulsed mode.

Abstract: An indirect frequency synthesis, microcomputer-controlled tuning system utilizing a frequency stepping process to tune to a selected channel frequency is disclosed. AFC discriminator information relating to a predetermined frequency range around the correct nominal frequency for the selected channel and the tuning direction toward the nominal frequency is provided to the microcomputer for frequency-stepping the tuner along the AFC discriminator curve in tuning to the selected channel. Vertical sync verification of the detected carrier signal provides more reliable carrier signal detection with the frequency-stepping procedure resumed upon invalid carrier detection. If a limit of the tuning range is reached, tuning is immediately switched to the other limit with the frequency-stepping procedure resumed in the original direction following a predetermined system stabilizing period.

Abstract: A loudspeaker protection circuit senses an overload condition caused by an improper input signal or a fault within the amplifier by sensing a DC or infrasonic signal applied to the loudspeaker. The time between zero (axis) crossings of the amplifier output signal, which are related to the lower frequency components of the signal, are detected. If the period of time between zero crossings exceeds a predetermined time limit, the supply of the amplifier output signal to the loudspeaker is interrupted. In order to prevent false tripping of the circuit by normal conditions, the circuit only responds to signals exceeding a predetermined voltage level.

Abstract: A cathode ray tube socket assembly incorporating controlled, or tuned, spark gaps coupling the high voltage focus grid system to ground to prevent television receiver damage caused by CRT arc-over. Incorporated within the CRT socket assembly are a high voltage spark gap connected to the CRT's G.sub.4 focusing grid and a lower voltage spark gap connected to G.sub.3 focusing grids, each spark gap including ridged sections defining an inter-electrode aperture. By varying the size of the inter-electrode aperture and its distance from each electrode, the spark gap's arc-over threshold voltage and breakdown voltage range from initial arc-over to continuous corona discharge may be precisely controlled.

Abstract: A system for preventing CRT phosphor burn in a multiple CRT projection type television system is disclosed. The absence of an electron beam deflection signal in the deflection yoke of a CRT is detected and used to provide a signal to CRT shutdown circuitry by means of an unbalanced transformer approach in which the various deflection yoke signals energize a plurality of primary transformer coils with a shutdown signal provided by the transformer secondary when a primary coil flux unbalance occurs.

Abstract: Disclosed is a vertical drive circuit for a cathode ray tube in a video display in which sawtooth current waveform corrections for the deflection yoke are made by means of an S-correction feedback loop featuring DC-coupling and low frequency filtering. The amplified correction signal is transmitted to a push-pull type output stage for driving the deflection yoke. Power consumption is reduced and operation made more efficient by an approximate doubling of the retrace voltage applied to the push-pull output stage during retrace by means of a discharging capacitor network.