Abstract: An internal magnetic shield for a color picture tube has lower reluctance in the sides of the shield than the top and bottom of the shield.

Abstract: An apparatus is provided which determines whether a member is placed correctly on a base. The apparatus comprises an arm mounted for movement toward and away from the base which normally holds the member in place on the base. The arm has a projection which extends a distance beyond the surface of the arm and toward the base. When the member is in a first or third position relative to the base, the projection makes contact with the member. When the member is in a second position relative to the base, the projection clears the member and is positioned in close proximity to the side of the base. The apparatus determines the position of the member by sensing with a photosensor a corresponding position of the arm displaced from the base. The displacement distance of the arm relative to the base is due to the distance that the projection extends beyond the surface of the arm.

Abstract: An electrical data filter is provided for reducing noise reception and generation for data signal which is transmitted differentially on two conductors constituting the twisted-pair cable. The data filter includes an in-line transformer and a shunt transformer. The in-line transformer has a winding (i.e. the primary or secondary) in series with each line of the twisted pair. These windings are arranged so that they are wound in the same direction. Similarly, the shunt transformer includes a winding which shunts each wire of the twisted pair to ground through a series capacitor. These shunt windings are wound in opposite directions to each other.

Abstract: In a beam scan velocity modulation (SVM) system for a television receiver, a video signal is applied to a differentiator followed by a limiting differential amplifier. A driver amplifier coupled to the limiting amplifier drives an output stage that supplies current to an SVM coil. Certain video signals with large high frequency content may tend to produce excessive dissipation in the devices of the output stage. To prevent this, a current source for the differential amplifier is controlled by a voltage which is a measure of the average current through the output stage. The magnitude of the current source is varied to thereby vary the peak-to-peak signal output from the limiting amplifier to prevent overdissipation of the output devices. The driver amplifier performs a coring operation that is unaffected by the variable limiting.

Abstract: A disk cartridge for use with a disk changer wherein various internal members can be assembled by a minimal number of screws or like fasteners, and with a minimal size and thickness, and a disk player with an integrated disk changer wherein an end of a disk drawn in by a drawing-in mechanism does not collide with any member such as a clamper, and a guide need not be moved away when a disk is moved to a position at which it is to be clamped by the clamper. The disk cartridge includes several partition plates each having a pair of spacers formed on the opposite sides thereof and placed one on another to define several disk receiving slits, and a pair of spring plates for resiliently pressing disks in the slits in suitable directions. The disk cartridge is handled on the disk player by a disk discharging device which employs a power converting device, a disk loading device, a disk clamping device and a cartridge ejecting device, all of which are improved.

Abstract: A FET transistor has a gate structure consisting of at least three layers of polysilicon with a thin oxide layer on the order of atoms thick separating each of the layers. A method for formation of the multilayer gate structure and the formation of resistors comprised of layers of polysilicon separated by oxide layers are also provided.

Abstract: A semiconductor memory cell with an N-type conductivity capacitance implant region self-aligned with a polysilicon transfer gate is disclosed. In a first embodiment after a blanket capacitance implant, formation of the capacitance storage polysilicon gate and an overlying insulating layer, a plasma etch is used to define specific regions of the capacitance implant. In a second embodiment, a complementary implant step is used after formation of the insulating layer over the capacitance storage polysilicon gate. Subsequently, in both embodiments, a transfer gate is formed with an edge surface adjacent to and abutting the insulating layer over the capacitance storage gate and substantially aligned with an edge surface of the capacitance implant region.

Abstract: The invention disclosed herein relates to a test socket for making solderless connections between an electrical component and a printed circuit board. The socket includes a lid member that translates longitudinally with respect to a base member upon operating a cammed actuator. The lid member is connected to and guided upon the base member by a plurality of flexible linking clips. The invention includes a plurality of electrical connectors having a pair of resilient beams that are preloaded. A lead portion is formed from one of the opposed beams and extends unitarily therefrom.

Abstract: A cleaning apparatus having a container for holding a quantity of cleaning agent, which is vaporized and condensed to form an upper vapor layer. Essentially, the container is divided into a lower chamber, for holding the cleaning agent, and an upper chamber for containing the vapors. One or more heat pumps are adapted to establish a relatively low temperature in the upper region to condense the vapors released by the lower heating process. Multiple high thermally conductive shunting devices are coupled between the high temperature end of the heat pumps and the bottom portion of the container to transfer extracted heat from the upper portion to the lower portion, to augment the vaporization process.

Abstract: A decoding arrangement for decoding audio signals previously encoded in accordance with the dbx format, includes a wideband expander instead of a full dbx expander. The wideband expander employs a relatively simple, and therefore inexpensive, peak detector in place of the true RMS detector of a full dbx expander, and does not include apparatus for spectral expansion of the audio signal. Although the decoding is noncomplementary with respect to the encoding, the stereo audio reproduction as perceived by a listener, is surprisingly good.

Abstract: An electrical component includes a plurality of laminated layers of ferrite material, each layer having a conductive coil printed thereon. The conductive coil is formed by first printing a conductive sheet material on top of the ferrite layer, and then by exposing the conductive sheet material to a burst of laser energy focused in a predetermined pattern which cuts the coil out of the conductive sheet member.

Abstract: A picture-in-picture system including panning and scrolling capability moves an inset image about a display in synchronism with the vertical field rate in order to provide smooth movement from one display position to another.

Abstract: A vertical amplifier of a vertical deflection circuit has an output transistor operating as a conductive switch that couples a boosted supply voltage to a vertical deflection winding during vertical retrace. A feedback network that bypasses the deflection winding is coupled between an output terminal and an input terminal of the amplifier to provide a phase lead. A clamping diode is coupled to the feedback network. The clamping diode reduces a magnitude of a feedback signal, during vertical retrace, in a manner to delay an instant in which the output transistor begins operating as an amplifier stage. The lengthening of vertical retrace due to the feedback signal is thereby reduced.

Abstract: A circuit for protecting a cathode ray tube screen from damage by an electron beam includes a semiconductor switch device having an input coupled to a signal related to a deflection signal for the electron beam. The switch device is coupled to a voltage supply and the circuit further includes a charge storage device coupled to the switch device and further coupled to a control grid of the cathode ray tube. The charge storage device is charged through the switch device by the voltage supply when the deflection signal is present at a control input of the switch device. The switch device decouples the supply voltage from the charge storage device when the deflection signal is not present and places a negative blanking voltage developed on the charge storage device across the control grid when the deflection signal is not present to cut-off beam current in the cathode ray tube.

Abstract: Apparatus and system for purging hot air from the cabin of vehicles when parked under hot sun conditions. The system employs a solar panel of relatively smaller size suited for incorporation with a sun roof or rear window of the vehicle. A power transfer regulator is utilized which is responsive to the peak voltage chacteristic of the solar panel to cause the panel to substantially continuously to perform at its peak power output capability. As such, an equivalent power at lower voltage and enhanced current levels is submitted to the electric drive motor of an air purging fan within the vehicle. Switching controls are provided which monitor the state of the vehicle's internal combustion engine through its ignition switch and which provide turn-on of the purging system at such time as vehicle cabin temperatures reach predetermined levels. When the air circulation system is disabled, the solar panel is employed for charging the battery of the vehicle.

Abstract: A novel cable for computerized monitoring system comprises at least one outer jacket of plastic abrasion resistant material, one inner layer of fiber reinforcing material and another jacket of plastic abrasion resistant material. The end which is intended to be connected to the tool has a clamp to hold the fiber reinforcing material in place and prevent the fiber reinforcing material from being damaged. The clamp is a hollow cylinder about 1 inch in length with a flange, is internally threaded and is provided with at least one, preferably four grooves. When the clamp is snapped over the end of the cable, the threads engage the plastic material of the outer jacket and the reinforcing material is held in the grooves.

Abstract: A driver stage of a horizontal deflection output transistor includes a transformer having a first winding coupled to a collector of a second, driver transistor responsive to an input signal at a horizontal deflection frequency. A second winding of the transformer is coupled across a base-emitter junction of the output transistor and a third winding is coupled to the emitter of and in series with the output transistor. The third winding couples the emitter current to the base of the output transistor for supplying a substantial portion of the base current during the second half of trace. A feedback network is coupled between a trace capacitor coupled to a horizontal deflection winding and the collector of the driver transistor for preventing abnormal steady state operation in the output transistor.

Abstract: A first amplifier is configured for accepting a signal input and providing a drive signal to a load. A second amplifier is configured in a voltage follower configuration with an input derived from the output of the first amplifier. The output of the second amplifier is coupled in parallel with the first to the load. The output from the second amplifier is nearly an exact duplicate of the output from the first amplifier, and the output contributions from the two amplifiers are therefore substantially equal. Isolation resistors are provided in series with the load and the respective output terminals of the amplifiers for protecting the operational amplifiers from adverse loading conditions.

Abstract: Clamping circuitry for adjusting the D.C. voltage of a signal which is A.C. coupled to an ADC includes D.C. level adjusting circuitry coupled to the input of the ADC. Logic circuitry, responsive to a single bit of output samples provided by the ADC, provides control signals to the D.C. level adjusting circuitry, to condition the D.C. level adjusting circuitry to adjust the D.C. level of the A.C. signal to a desired value.

Abstract: A hoop-like toy capable of automatically counting the number of rotations of the toy about a portion of a player. The hoop-like toy includes a torodially shaped member having a counter mechanism with an actuator displaceable upon contact with a player for indexing the counter mechanism and thereby counting rotations of the toy about a portion of the player.