Abstract: A method for executing diagnostic/testing programs written directly for a computer to be tested. In the preferred embodiment, the operation of the computer to be tested is simulated by a simulation computer and the diagnostic/testing programs are executed on a native computer. The native computer provides messages to the simulation computer indicating operations the diagnostic/testing program attempted to perform on the native computer. The simulation computer receives the messages and executes the operations indicated by the messages. The simulation computer generates response messages indicating the steps the computer to be tested would have executed, such as a direct memory access (DMA read/write), in response to the operations the diagnostic/testing program attempted to perform on the native computer. The response messages are provided to the native computer, which executes the steps contained in the reply messages.

Abstract: A balancing resistor and thermistor network for telephone circuits, and combination with an external relay, which reliably handles all three levels of adverse conditions, automatically resets under certain conditions, is physically small in size, and is strong. It is a flat ceramic substrate on both surfaces of which are screen-printed thick-film balancing resistor films. Also screen-printed on both surfaces are termination traces having portions so located that when the substrate substantially instantaneously fractures it reliably and substantially instantaneously breaks the circuits through the resistive films, the fracture occurring in response to a sudden high-voltage overload. Accordingly, there is no damage to, or melting or burning of, small wires in the telephone circuits at points near to or remote from the balancing resistor network. A thermistor film is screen-printed directly onto the substrate at a central region where there is no resistive film.

Abstract: A broadband radio receiver monitors transmissions over a broadband of frequencies, and especially over the aircraft band, between aircraft and control towers or between the cockpit and ground stations at an airport. The radio utilizes an earphone having a lead which provides an antenna. The lead is AC coupled to an amplifier having band-pass filters connected to the input and to output thereof to provide selectivity while passing the entire band. An AM detector is connected to the output filter and produces an audio signal which is coupled, via an RF blocking inductor, to the earphone by way of the earphone lead. A miniaturized self-contained radio is therefore provided which does not utilize a local oscillator or other radiating signal generator and may be used on board or nearby aircraft without violating regulations for the use of electronic equipment.

Abstract: A television receiver includes a single tuner for tuning both television channels and broadcast FM stations. The tuner serves as the first conversion stage of a double conversion FM receiver, wherein the mixer of an FM radio integrated circuit serves as the second conversion stage. A single discriminator circuit is employed for tuning FM radio signals having a first deviation, such as broadcast FM radio signals, and FM radio signals having a second deviation, such as signals of the National Weather Service. Circuitry for amplifying the output signal of the discriminator circuit exhibits a first gain when amplifying FM signals having the first deviation, and exhibiting a second gain when amplifying FM signals having the second deviation.

Abstract: A time delay fuse including a fuse casing, terminals located on the exterior of the casing, a hollow electrically insulated inner core having first and second holes in the walls thereof, a fusible element that makes electrical connection to the terminals and is disposed on the surface of the core such that the length of the element is greater than the distance between the terminals, the element passing through the holes, and a material that is deposited on a portion of the element passing through the interior of the core and lowers the melting temperature of that portion.

Abstract: A photometric gauge for measuring the diameters of a workpiece turned about a central axis. The apparatus comprises a light source which scans a light beam across and on either side of a workpiece, to reflect scanned light from a mirror having an approximately elliptical curvature. The light source is located at one focus of the elliptical mirror and a light detector is located at the other focus. Light passing beside the workpiece from the light source focus reflects back to the light detector focus, and the light detector generates an electrical signal. The signal is used by an electronic data processor, along with known geometric parameters, to determine the diameter of the workpiece. A profiler, using the above photometric gauge, takes diameter measurement at regular intervals along the axis of the workpiece, and plots the diameter versus axial position data.

Abstract: A method of soldering leads to electrical elements, such as resistors, in which a ribbon of solder, having a coating of flux, is sandwiched between a plurality of electrical elements and a plurality of leads. Hydrogen flames then cut the ribbon at points between the electrical elements and also between the leads. The hydrogen flames are then directed at the leads to melt the solder and cause extending portions of the ribbons to be drawn towards the leads.

Abstract: A differential amplifier formed by a pair of transistors couples a vertical sawtooth signal to an input side of a vertical deflection amplifier. Nonlinearity of the transistor pair provides S-correction in the vertical direction. The current in the transistor pair varies when vertical height is adjusted, in service operation, so that the nonlinearity changes. In a vertical shrink mode of operation, the amplitude of the sawtooth signal is reduced. The nonlinearity associated with a given level of the sawtooth signal that corresponds to a given vertical position in the vertical shrink mode is the same as that associated with the same level of the sawtooth signal in the vertical, non-shrink mode.

Abstract: An electrical connector assembly includes a terminal block having a plurality of spaced contact pins mounted thereon and oriented in a first direction. A plurality of openings are formed in the terminal block and each is aligned with one of the contact pins. A plurality of sockets are each mounted at the end of a lead wire and are constructed and arranged to be received in any one of the openings for electrically engaging the contact pin aligned therewith. A locking bar has a plurality of locking portions and is pivotally mounted on the terminal block for movement between an unlocking position and a locking position wherein the locking portions are respectively aligned with one of the openings. A biasing spring engages the locking bar for biasing the locking bar toward its locking position.

Abstract: A fuse that includes an insulating housing made from two housing pieces made of thermoplastic material, terminals extending through slots in the ends of the housing, and a fusible element having ends connected to both of the terminals. The housing includes a tubular portion and slotted end portions located at each of the two ends of the tubular portion. Each of the terminals has an internal portion inside the housing to which a fusible element is attached, an external portion outside of the housing, and a middle portion between the internal and external portions and located within one of the slots.

Abstract: A memory module, a partial address generator, and a controllable pseudo-random number generator are provided to a digital video system for generating values used to perform static/dynamic companding for transfer functions shifting/modifying digital video data. The memory module is used for storing an integrated collection of lookup tables comprising lookup tables having values used to perform linear/non-linear static and dynamic companding. The values used to perform static/dynamic companding are retrieved using composite addresses. During each access, the higher order bits are generated by the partial address generator, and the lower order bits are set to equal the current digital video data value being shifted/modified. The partial address generator generates the higher order bits of the composite address based on a number of companding scheme selection control signals and a pseudo-random number received as inputs.

Abstract: An automatic blood pressure gauge generates a signal representing the instantaneous pressure levels in a blood pressure cuff. This pressure signal includes a slowly changing component representing a deflating cuff and a more rapidly changing component representing blood pressure pulses that are mechanically coupled to the cuff. The pressure signal is DC coupled to a microprocessor. The microprocessor filters the pressure signal using a minimum order-statistic filter coupled in cascade with a median order-statistic filter to generate an auxiliary signal having peaks at the starting points of the pulses. This auxiliary signal is used to generate a signal representing the slowly changing component of the pressure signal. The slowly changing component of the pressure signal is subtracted from the pressure signal, leaving only the blood pressure pulse signal. The microprocessor then generates a function representing peaks of the blood pressure pulses versus a corresponding cuff pressure at which they occur.

Abstract: A dual compartment single evaporator refrigerator and temperature control apparatus that effectively controls two compartment temperatures by making the evaporator fan control independent of the compressor cycle. The compressor cycle is initiated by the fresh food compartment temperature, runs for a predetermined minimum time, and is terminated by the freezer temperature. The evaporator fan runs with the compressor and is terminated by the freezer control temperature. A small portion of the evaporator air circulation flows through the fresh food compartment and compartment temperatures are balanced according to the freezer temperature settings during the post-compressor cycle fan control. The temperature control set points to operate the compressor and fan are based on algorithms that compensate the control for the combination of freezer and fresh food temperature settings.

Abstract: A deflection apparatus comprises a deflection amplifier coupled to a deflection waveform modulation circuit such as a diode modulator. An East-West modulation signal is generated by a digital to analog convertor in accordance with a reference potential coupled thereto. The modulation signal has a DC component for width control, and is coupled to an input of a comparator. The reference potential is also coupled to an input of the comparator to establish a reference bias therefor. The comparator has an output coupled to the deflection waveform modulation circuit to provide the East-West modulation.

Abstract: A parity generating circuit that can replace the parity bit DRAM on a 9-bit SIMM. The parity generating circuit includes a parity generating tree which outputs the resulting even parity from the 8 data bits on a read. A 9th data input from another parity generator on the system mother board is compared to the generator tree output when DRAM is written to. If a mismatch occurs, the type of parity generated by the generator tree is opposite to the type of parity that the mother board generates, and the parity tree output must be inverted on subsequent reads. A latch is provided to store the compare result, which also indicates the type of parity required, even or odd, on the particular system the SIMM is installed on. The latch is loaded when the DRAM is written to. The state of the latch is used to output the correct type of parity on a read from DRAM by inverting the output of the parity generating circuit if needed.

Abstract: A ball grid array is formed by mounting and electrically connecting one or more electronic devices to a substrate in which vias are formed to interconnect electrically conductive traces formed in a surface of the substrate to solder ball pads formed at an opposite surface of the substrate. The vias are formed by mechanical or laser drilling. Solder balls are formed on each of the pads and are reflow-attached to, for instance, a printed circuit board. The electronic components can include one or more integrated circuit chips, as well as passive components. The electronic components are attached to the substrate using wirebonding, TAB or flip chip connection. An encapsulating material is applied to encapsulate the electronic devices.