Abstract: A multi-beam satellite switching system employs onboard switching for the purpose of increasing the up path and down path antenna gains. A multiplicity of up path antenna beams and of down path antenna beams (not necessarily the same number of each direction) are provided by the system. A number of amplifier systems are distributed across the frequency band of interest. These amplifier systems comprise input amplifiers including filters, frequency converters and output amplifiers. A switching and control circuit accepts an up path signal from only the desired input amplifier and connects the desired output amplifier to the desired down path beam. Each earth station transmits to the satellite a suitable signal to perform the desired switching functions.

Abstract: A high voltage generating apparatus suitable for a television receiver. A flyback transformer has a secondary winding divided into a plurality of parts by at least a diode and a primary winding connected to a variable voltage divider circuit for varying the primary-side flyback pulse voltage. The variable voltage divider circuit is connected to an end of a focus capacitor with the other end thereof connected to the cathode of the diode, so that a variable pulse voltage is applied to the focus capacitor to regulate the focus voltage.

Abstract: A color picture tube of an in-line type comprises means for deflecting beams of electron emitted from electron guns of the in-line type aligned horizontally such that for the horizontal deflection, the central beam is subjected to a greater deflection than side beams and for the vertical deflection, the side beams are subjected to a greater deflection than the central beam. Two vertical magnetic pole piece plates which are long vertically and thin horizontally are so disposed as to sandwich the central beam near the outlet of the central electron gun in order to weaken horizontal deflection magnetic field acting on the central beam, whereby a portion of the horizontal deflection magnetic flux acting on the central beam is absorbed by the two magnetic pole piece plates. The vertical deflection magnetic field is almost not affected by these vertical magnetic pole piece plates.

Abstract: A convergence apparatus in a convergence circuit of a CRT, comprises,Means for dividing a horizontal parabolic waveform voltage in suitable voltage levels corresponding to a vertical parabolic waveform voltage; means for shaping the waveforms of the divided voltage signals; means for composing the shaped voltage signals to give the shaped covergence correction voltage signal; andMeans for feeding the current corresponding to the shaped convergence correction voltage signal waveform to a convergence coil to correct the scanning positions of the electron beams.

Abstract: Interference between radar systems is eliminated by using shaped pulses. In one embodiment, the pulse has a cosine shape, in another a cos.sup.2 shape and in a third embodiment a cos.sup.n shape. In yet another embodiment, a single sideband shaped pulse is employed.

Abstract: A fluid tight geophone case having a case nose having an interior cavity for receiving the geophone to be enclosed and a mounting means for receiving an elongated spike wherein the case nose includes a threaded collar and indentation in the collar for receiving a first O-ring seal, a case top which is tapered having a hollowed-out central area, a small passageway at the top which is a restriction in the form of a cone with base directed toward the central area and a large opening at the bottom which is internally threaded to mate with the case nose and having a slot to receive the first O-ring seal, a tapered compression cone having thin side walls, a small tapered end having an aperture which is formed in an inverted cone forming a grommet cavity with the passageway of the cone, a shaped cavity in the interior of the compression cone and a large opening at the other end with an annular shaped slot formed around the outer periphery of the end to receive a second O-ring seal and a yieldable grommet located in

Abstract: A position determining system in which a delay element has at least one driver transducer at at least one position and at least one receiver transducer at at least one other position, the transducers being arranged so that a traveling wave signal at the driver transducer travels along the delay element from the first said at least one position to said at least one other position so that a distance which is to be measured is traversed more than once. Certain embodiments accomplish such operation by providing a "folded" or U-shaped delay element, the driver and receiver being located on separate legs thereof so that the traveling wave traverses both legs of the delay element so that the distance which is to be measured is traversed twice, thereby increasing the resolution of the overall device.

Abstract: Displays of first and second points are generated on a fluorescent screen. A first mark, which coincides with the display of said first point, is displayed on said fluorescent screen. A linear second mark is displayed on said fluorescent screen. A parameter which controls the position of said second mark on said fluorescent screen is varied in a known manner to move said second mark to a plurality of positions, in each of which said second mark constitutes a display of a circle which is centered on said first point, inclusive of one position in which said second mark is in close proximity to the display of said second point, said parameter having a predetermined, known relation to the radius of said circle so that the value of said parameter is a measure of the distance between said first and second points when said second mark is in said one position and said first mark coincides with the display of said first point.

Abstract: A microwave system is disclosed for simultaneous amplification and radiation of CW and pulsed signals wherein signals from a CW amplifier tube and a pulsed power amplifier tube are transmitted to an antenna where they are radiated as signals with circular polarizations of opposite direction. In one embodiment interstage circuitry between the amplifiers and the antenna includes a magic "T" hybrid and a 90.degree. phase shifter.

Abstract: In a circuit arrangement for providing a periodic saw-tooth current in a coil, e.g. a kinescope deflector coil, comprising a one-way conducting device that connects the coil to a voltage source, and a controllable switching device having a control electrode connectable to a periodic pilot-pulse source that makes the switching device conductive during part of the saw-tooth cycle, the switching device being connectable to a current source through an induction coil, including a capacitor that is charged by the current source by means of the induction coil when the switching device is not conductive, the improvement wherein the capacitor is connected to the primary winding of a transformer, the secondary winding of the latter being connected to the one-way conducting device, and wherein the time during which the switching device conducts and the capacitor discharges are longer than the return time of the saw-tooth cycle.

Abstract: A first capacitor is coupled in parallel with a vertical deflection winding and the two are coupled to a source of horizontal rate energy by means which permit the capacitor to be charged with decreasing and increasing amounts of horizontal rate energy during respective first and second portions of each vertical deflection interval. The discharge of the first capacitor through the winding produces the vertical rate sawtooth scanning current therein. A second capacitor and impedance means coupled in circuit with the first capacitor are responsive to the horizontal rate energy to alter the shape of the generally sawtooth shaped horizontal rate voltage developed across the capacitors for producing a substantially symmetrical horizontal rate parabolic current component superimposed on the vertical rate sawtooth scanning current during each horizontal trace interval during the vertical trace interval for effecting north-south pincushion distortion correction current in the vertical winding.

Abstract: A light pen detection and tracking scheme for detecting and tracking both "on" and "off" cells with a single cursor voltage waveform in an AC gas discharge display panel. The special cursor voltage waveform is applied to the panel during the sustain cycle, in either a line-by-line or binary scanning fashion, to momentarily fire both "on" and "off" cells so that they may be detected by the light pen without a loss of the memory state of the cells. A cross-hair cursor is automatically displayed at the pen position when the search scan is complete. Since both "on" and "off" cells are detected, the system can respond to pen motion by repeating the search to reacquire the pen, so that no special tracking strategy is needed.

Abstract: A rigid, fluid resistant enclosure adapted to encase a geophone electrically connected to a cable including a housing having an open end in and inner walls defining a cavity adapted to receive a geophone encapsulated in a fluid tight membrane or boot, which membrane has a sealing ring located around the top edge of the geophone, the open end of the housing having a counterbore axially aligned with and formed into the cavity terminating in a countersink having inwardly sloping walls defining a sealing surface which communicates with the inner walls of the cavity, a flexible header positioned within the counterbore and countersink of the open end of the housing and two resilient opposed elongated cable entry means having sealing nipples adapted to have a cable extended therethrough into a hollowed out central area which is to be electrically connected to the geophone and wherein the resilient sealing nipples have a plurality of axially aligned sealing ridges extending around the interior thereof to engage with

Abstract: A method for aligning a deflection unit on an in line CRT uses a multipole field generated by the deflection unit. The center beam is turned on and the deflection unit aligned until it makes a single dot pattern on the CRT screen.

Abstract: A tracking filter circuit for use with optical image correlators is presented. The output signal of the optical image correlator exhibits a frequency content shift during operation due to the application of a ramp voltage to the nutation control circuitry of the correlator. The filter circuit is controlled by the ramp voltage such that the frequency response of the filter tracks the frequency content shift of the output signal. Integrator and multiplier circuits are interconnected as a part of a feedback network to accomplish the filtering technique.

Abstract: A rectifying device, a switching device and a reference voltage device are coupled in parallel relationship between a winding of a transformer associated with the deflection circuitry of a television receiver and a filter capacitor of a power supply circuit for providing operating voltage to other portions of the receiver. The reference voltage device is also coupled to a control terminal of the switching device to control its conduction. Under normal conditions, the rectifying device is conductive in only one direction so that the filter capacitor is charged to a sufficient operating voltage to permit the normal operation of the receiver.

Abstract: An improved method and apparatus for automatically monitoring objects, such as vehicles, for example, wherein signpost units are positioned at predetermined locations and each signpost unit transmits a binary signpost code for reception via units installed in the objects being monitored and the objects being monitored receive the signpost codes and store object location information. In one aspect, the present invention contemplates a method and an apparatus which has a multi-mode operation capability wherein the location of the monitored objects is reported when the monitored object enters a different coverage region in an automatic reporting mode, wherein only those monitored objects within a predetermined region or on a predetermined route report to the base station in a region or route reporting mode, and wherein only the locations of predetermined monitored objects are reported to the base station in a polling mode.

Abstract: A digital seismic telemetry system for recording seismic data from a plurality of seismic signal detectors positioned at selected detector stations. The system includes a plurality of remote units, each of which is positioned at a distinct detector station to receive seismic data from the detector at that station. The remote units each include a storage device for storing seismic data from the detector in digital form, and a remote transmitting unit for transmitting the stored seismic data from the storage device to a master recording unit for recording. A master control unit operably connected with each of the remote units controls the acquisition and the transmission of seismic data from the remote units to the master recording unit and limits the amount of data transmitted at any given time to optimize the bandwidth requirements for the data transmission.

Abstract: A vibration transducer has a cylinder for enclosing a viscous damping medium. A seismic mass in the form of a piston is mounted in the cylinder for axial oscillation with the aid of a spring suspension which is flexible in an axial direction and has its maximum stiffness at right angles to that axial direction to retain the piston against radial movement relative to the cylinder. A mounting post extends through a bore in the piston and the spring suspension includes a bridge extending from one side to the opposite side of the piston. The axial oscillation of the piston is damped with the aid of floating seals between the piston and cylinder, between the piston and the mounting post and between the piston and the spring suspension bridge. These floating seals impede the flow of the viscous damping medium past the piston while at the same time avoiding static friction between the moving parts and the piston of the vibration transducer.

Abstract: An electron multiplier includes a plurality of staggered parallel dynodes. The dynodes include spaced confinement bumps along their lengths with active multiplying areas between the bumps. The confinement bumps and active areas therebetween define a plurality of channels which extend from a cathode at one end of the multiplier to the output end. Each channel traverses the staggered parallel dynodes and causes an electron beam to pass therethrough without substantial spreading. The electron multiplier includes additional structure for creating a high gain condition in the channels which are desired to be in an "on" condition while simultaneously creating a low gain condition in the adjacent channels. Electrical potentials can be simply switched at the dynodes so as to change this first condition into a second condition where the relative gain parameters of the channels are reversed.