Abstract: A digital video signal processing system receives encoded packets of data representing video image information in compressed form. A video decoder and an associated video RAM are used to decode and decompress the video packets to form groups of video image representative digital words. The video image groups are organized in a compressed component format (e.g., Y, U, V in the ratio 4:2:2) related to the video image compression format in which pairs of color related components correspond to more than one pixel. The video decoder also includes an on-screen display (OSD) unit which converts a graphics bit map stored in a section of the video RAM to groups of graphic image representative digital words. The graphic image groups are organized in an uncompressed component format (Y, U, V in the ratio 4:4:4).

Abstract: A projection television receiver has a cathode ray tube with an electron gun for emitting an electron beam incident on a screen, an electromagnetic deflection yoke and an electromagnetic focusing coil. The focusing coil is included in a resonant circuit. The resonant circuit is energized by switching operation of a switching transistor in the vicinity of a retrace interval. Variations of the focusing coil current in the vicinity of the retrace interval provide dynamic focus.

Abstract: A zero insertion force pin grid array socket includes a cover slidably engaged to a base and having an array of holes formed therethrough. The base has an array of corresponding passages, the passages receiving pins of an IC package inserted through corresponding holes of the cover. Contacts are mounted within the passages and include a generally tuning fork shaped contact having beams which deflect the insertion forces of the pin of the IC package which have a surface area of at least forty percent of the entire surface area of contacts. The contacts include wiping areas which are plated which have a surface area of less than an eightieth of the entire surface area of the contact. The socket cover includes a means for providing an air-gap between the socket cover and the IC package.

Abstract: A hand-held strobe light which may be used in rescue or emergency operations in peacetime or in a combat zone. The light includes a watertight housing with a high intensity bulb which flashes white light. Interchangeable blue and infrared filters attached to a flash guard body can be used with the bulb for filtering various wave lengths of light spectrum in combat situations and for both 360 degree or line-of-sight transmission.

Abstract: In order to facilitate the weighing of large compressed gas cylinders, a hand truck which is used to move the cylinders to a set of scales is provided with a hydraulic or mechanical servo which allows the cylinder to be elevated while it is on the hand truck to a height suitable for off-loading into the scales platform.

Abstract: A solid state miniature condenser and condenser microphone of good sensitivity is disclosed. The microphone comprises a fixed perforated backplate that constitutes a fixed electrode in a parallel plate condenser, a diaphragm sensitive to incident sound pressure waves that constitutes a moveable plate in the parallel plate condenser, keepers to position the diaphragm in relationship to the backplate without applying appreciable tension to the diaphragm, and FET circuitry which provides an output proportional to the change in capacitance of the condenser when the diaphragm moves in relationship to the backplate.

Abstract: A clockspring interconnector comprising a housing wall defining a chamber extending therethrough and a rotor hub attached to the housing. A coiled flat cable carried within the chamber surrounding the rotor hub. The flat cable having a first end attached to a first connector location of the rotor hub and a second end attached to a second connector location of the housing wall. A vibration dampener compresses the coils of the flat cable to limit vibration. An outer vibration dampener adjacent to the housing wall compresses the flat cable inward toward the rotor hub. An inner vibration dampener compresses the flat cable outwardly towards the housing wall. The vibration dampeners are preformed having folds formed therein.

Abstract: A fruit juice extracting machine has a pair of opposing endless cup chains extending around a rotatable reamer wheel. The peel guide or retainer holds reamed peel halves in cup until ejector directs peel half into peel chute. A filler plate panel substantially closes off the reamer wheel to help to prevent the accumulation of stagnant juice or pulp. A peel chute behind the reamer wheel has a back surface with slotted opening to recover additional juice and pulp as the peels are ejected from the cup chain and collide against the back surface of the peel chute. The new cup track is a stiffer structure for maintaining the cup chain in proper engagement to the reamers, for improved yield and reduced wear. A full width bulkhead divides the juicing area from the peel chute area.

Abstract: Disclosed is an audio follow video mixer incorporating a manual cross fade learn feature. According to the invention, an operator may set the mixer so that a crossfade operation performed manually is stored in memory. The stored crossfade operation can thereafter be recalled and performed in an AUTO mode and an EDITOR mode. Also disclosed are LED indicators to visually indicate the status of the mixer, including which channel is active.

Abstract: A magnetic ink character recognition (MICR) system includes power management features so as to permit the unit to be powered by the auxilliary power provided by a generic host (e.g., an electronic cash register). The system also includes motorized conveyance features in combination with a track facilitating manual conveyance.

Abstract: A controllable current source in an AKB circuit applies a measurement current to a kinescope driver amplifier during selected lines of the vertical interval of a video input signal to induce a beam current in a kinescope coupled to the driver amplifier. A comparison circuit compares samples of the beam current obtained during the selected lines with a reference signal and applies a correction current to the driver amplifier for regulating a parameter (e.g., black level) of images displayed by the kinescope. A signal source, coupled to the measurement current source, inhibits production of the measurement current during retrace portions of the selected lines and enables production of the measurement current during trace portions of the selected lines. Advantageously, the signal source provides suppression of visual artifacts due to AKB operation when using direct view or projection kinescopes of a type in which pincushion correction is not applied during line retrace intervals.

Abstract: A dynamic focus amplifier, comprising: a first circuit responsive to a vertical rate sawtooth waveform for generating at the vertical rate a modulating waveform having a desired component of a given shape during trace intervals and an undesired time compressed version of the given shape during retrace intervals; a second circuit responsive to the sawtooth waveform for generating a pulse waveform at the vertical rate, substantially corresponding in width and phase to a vertical retrace blanking waveform; and, a differential amplifier stage, formed by Darlington pairs, for combining the modulating waveform and the pulse waveform to remove the undesired time compressed version of the given shape from the modulating waveform. The second circuit may comprise a capacitor which is charged in a first direction by the sawtooth waveform during vertical trace and charged in an opposite direction during vertical retrace.

Abstract: A video control system, comprises a deflection system having a dimensionally adjustable raster, a circuit for detecting a letterbox video signal source and a circuit for dimensionally controlling the raster of the deflection system responsive to the detecting circuit. The detecting circuit and the control circuit are operable automatically. The detection circuit can comprise a circuit for measuring video luma levels of the video signal source in at least two regions of each video field and a circuit for comparing the luma levels from each of the regions to respective threshold levels. In an alternative, the detection circuit comprises a circuit for comparing respective minimum and maximum luminance values for a plurality of successive video lines, a circuit for storing minimum and maximum luminance values for the plurality of video lines, a circuit for generating gradients indicative of the stored values and a circuit for comparing the gradients to threshold values.

Abstract: A free running frequency alignment method in a video display having a sync generator comprising a first oscillator having a first frequency and a second oscillator having a second frequency. The first oscillator is phase modulated by the second oscillator which has a free running frequency different from a standard frequency. The free running frequency of the first oscillator is to be controllably aligned to the standard frequency by a method comprising the steps of applying a frequency determining initial control value to the first oscillator and measuring an average free running frequency responsive to the initial control value. An absolute difference frequency is calculated between the average frequency and the standard frequency. The absolute difference frequency is tested for a frequency value less than a predetermined value which signifies an aligned condition. If the difference frequency is less than the predetermined value the alignment is complete.

Abstract: An improved pressure control apparatus for a stirling module capable of controlling a pressure between compression space and a bounce space by providing an improved pressure control apparatus, so that a high speed operation of a stirling module can be obtained, which includes a piston including a plurality of pressure control hole groups vertically extended within the piston for connecting between the compression space and the bounce space, each of groups consists of at least one hole; a pressure control member supporting section having a diameter smaller than that of the piston and upwardly extended from the top of the piston; a support member engaging section having a diameter smaller than that of the pressure control member supporting section and upwardly extended from the top of the support member engaging section; and a pressure control member including an engaging section threadly engaged to the pressure control member supporting section and an opening/closing section having a plurality of wings.

Abstract: A hood, preferably constructed of rigid plastic, which is to be press-fit onto a socket contact. The socket contact is made of resilient conductive material and has fingers at one end for making a connection with a male contact pin. When the hood is pressed onto the socket contact, it covers the fingers of the socket contact along with the slits between the fingers and provides for a non-intermittent electrical connection with a male contact pin.

Abstract: A method and apparatus is provided for reducing relaxation noise in a conducting medium. The device is fabricated by affixing two magnets at like, repelling poles; wrapping said magnets with a coil of wire in an orientation orthogonal to the interface between the joined magnets and the like poles of the magnets to form a magnetic unit; connecting said coil to a motor means, an electrical power supply means and a switch means; attaching a spindle to said motor means. The spindle receives said conducting medium. The apparatus can be in a housing. The conducting medium is placed on said spindle. By activating the device, a modulated magnetic electromagnetic field is created simultaneous to the spinning of the conducting medium. The information recording medium rotates through the modulated electromagnetic field, thereby reducing the relaxation noise.

Abstract: Disclosed is an improved XLR connector which automatically terminates at least two of the matable connecting terminals of the XLR connector when the XLR connector is not attached to another XLR connector. The XLR connector includes a spring-biased switching member which opens and closes depending on whether the XLR connector is attached to another XLR connector. According to a first embodiment of the invention, an internal resistor is provided in the XLR connector which has a resistance that matches the impedance of the signal lines coupled to the XLR connector. According to a second embodiment, two additional terminals are provided on the XLR connector which are coupled together through the switching member. Thus, the state of the XLR connector may be detected by detecting the potential difference between the two additional terminals.