Abstract: A gyroscopic vibrator provides a new vibrational energy source for applications such as reflection seismology and shake tables. A gyroscopic mass is rotated at a high angular velocity about a shaft. A control force imparts an oscillatory angular displacement to the shaft, preferrably in a plane perpendicular to the vector direction of the desired vibratory source. The resultant gyroscopic reactionary moment in the shaft includes a force component in the direction of the desired vibratory force. One end of the shaft is constrained by a reaction mass while the other end of the shaft is mechanically coupled to the mass which is to be excited. The resultant excitational forces are substantially greater than the controlled force required to impart the angular displacement to the shaft.

Abstract: A gapless propagation path structure for magnetic bubbles in a magnetic bubble domain memory system employing permalloy elements, wherein the drive field requirements for the in-plane rotating magnetic field may be reduced for high magnetization materials. An overlay pattern of magnetizable material, e.g. permalloy, is provided on a layer of magnetic material of a type suitable for the propagation of magnetic bubble domains therein. The magnetizable overlay pattern includes respective magnetizable elements forming the propagation paths for the magnetic bubble domains, the elements being so arranged as to provide a continuous track of magnetizable material included in the magnetizable overlay pattern, thereby defining a gapless propagation path for the magnetic bubble domains.

Abstract: Disclosed is a phototransistor comprised of an indium arsenide n-type semiconductor substrate, a thin, relatively lightly doped p-type cadmium diffused region in the substrate forming a photosensitive diode junction, and a metal film in rectifying contact with the p-type diffused region to form a Schottky barrier.The method for fabricating the transistor comprises producing the shallow cadmium diffusion, etching the surface of the diffused region to a predetermined depth to reduce the doping level and the surface oxide level, and depositing the metal film on the etched surface of the diffused region.

Abstract: An improved, dual function, thermal valve assembly has three ports and two passages connecting these three ports to a common chamber. The assembly employs two thermally responsive actuating members which are actuable to move a valve plug in the chamber at different temperatures to provide a first temperature region wherein the plug seals port one so that only ports two and three are in communication, a second temperature region wherein the plug does not seal any of the ports so that ports one, two, and three are in mutual communication, and a third temperature region wherein the plug seals port three so that only ports one and two are in communication.

Abstract: The disclosure relates to improved detectors for use in digital charge coupled device (CCD) applications as, for example, in a multiplexing system, for recreating full logic voltage levels by detecting extremely small amounts of charge available in CCD bits. This is accomplished by means of a flip-flop circuit wherein opposite nodes of the flip-flop are precharged to a predetermined intermediate level between a logical 0 and a logical 1, one of the nodes being a reference node and the other node being coupled to a CCD storage device. During sampling of the bits being read out from the CCD storage device, the detecting node of the flip-flop will have its voltage altered, either upwardly or downwardly, from the charge on the CCD being read out. This will cause an imbalance in the flip-flop and cause the flip-flop to conduct on only one side thereof, this being determined by the charge detected. In this way, a very low level signal can be detected and amplified to a full logic voltage level for readout.

Abstract: Rolled stock of a relatively nonductile material and a powder metallurgical method for its production. A precompact is formed including a body of powder of said nonductile material with generally parallel borders of a ductile metal powder compatible with the nonductile material along two side edges thereof. The precompact is compressed to form a compact of said nonductile metal with borders of said ductile metal and having two generally parallel faces extending between the outside edges thereof. The compact is sintered to form a bordered ingot which is then rolled in a direction parallel to its borders by applying rolling force to its faces. Initiation of edge cracks during the rolling operation is thereby inhibited.

Abstract: The invention relates to context switching wherein the memory address of the workspace of a problem program is stored in the memory workspace of an interrupt program. In a more specific aspect, workspace in memory stores a problem program workspace pointer, program counter contents and contents of a status register upon occurrence of an interrupt. The location of a workspace in main computer memory is referenced by the contents of a workspace pointer register. Upon occurrence of an interrupt, the contents of the register are stored in one element of a new workspace in main memory while referencing the new workspace by loading new contents into the workspace pointer register.

Abstract: A system for the alignment and orientation of disc-like objects having transport means to move the object gently onto a turntable and against an arcuate resilient stop to a centered position on the turntable; an array of non-contact sensors is advanced toward the rotational axis of the turntable until one of the sensors detects the edge of the object; the turntable is rotated until the sensors detect an indexing flat on the object; the sensor arrays advance and the turntable rotated until the sensors indicate the desired alignment and orientation of the object has been achieved. Logic circuitry controls the sensor and turntable positions automatically in response to signals received from the sensors.

Abstract: An MOS/LSI semiconductor chip for providing the functions of an electronic calculator or digital processor includes a data memory, an arithmetic unit for executing operations on data, and a control arrangement for defining the functioning of the machine including a ROM for storing a large number of instruction words, and control decoders for receiving instruction words from the ROM and producing various commands for the control arrangement. Separate X and Y address registers are provided for selecting the location in the ROM for the next instruction. Input and output terminals are provided, as for keyboard input, and display output. A test mode of operation is provided for quality control upon completion of manufacture of the chip.

Abstract: Processes for manufacturing buried channel charge coupled devices (CCDs). After formation of an insulating layer at the surface of the CCD semiconductor substrate, a dopant material, suitable for the formation of the buried channel, is ion implanted into the insulating material. Subsequent diffusion steps cause the dopant to migrate into the underlying surface of the semiconductor substrate so as to define the buried channel region below the substrate surface.

Abstract: A charge transfer device comprising a time demultiplexer for separating in time, segments of a signal, such as a return radar video, and filtering the output from each time segment in order to a) reject zero doppler clutter or b) determine the frequency of the principal signal present indicative of the doppler shift of a related target within that time segment.

Abstract: A display system is disclosed for use in connection with a beacon tracking receiver. The display system provides both audible and visual displays for use in locating a source of radio transmission. The display includes an audible tone signal to indicate the reception of a desired signal and with a frequency indicative of the distance to the transmitter. The visual display includes the direction as well as the distance to the transmitter. Also disclosed is a new switching means for use in activating the transmitter of a beacon tracking system.

Abstract: A read-only-memory for use in an electronic calculator or the like, implemented in a large-scale-integrated MOS semiconductor chip. The ROM is designed to save space on the chip by employing a virtual ground feature and to operate fast due to a precharge system. The memory cells are in an array defining X and Y lines, with the presence or absence of a bit being determined by thin oxide under an X line between adjacent Y lines. Ground lines are provided for groups of Y lines, and the Y-decode matrix includes an arrangement for connecting a selected Y-line to a non-adjacent ground line and to an output line, using a minimum number of transistors. The Y lines are precharged to a value significantly less than the chip supply voltage, so that operating speed is enhanced.

Abstract: An MOS/LSI semiconductor chip for providing the functions of an electronic calculator or digital processor includes a RAM for data storage, a ROM for program instruction storage, an arithmetic unit for performing operations on data, and control circuitry for defining the functions of the machine in response to instructions from the ROM as well as conditions in the machine and inputs from external. The operation is digit oriented in that in a machine cycle one digit of the RAM is accessed, and also the ROM is addressed to provide an instruction word which is decoded and executed. The data input to the system is by four parallel lines which may be connected to a scanned keyswitch matrix or to BCD or binary data sources. Within the chip, the data inputs may be coupled to the input of the arithmetic unit, or to the data memory directly.

Abstract: A radio frequency transmitter is hidden within a packet of currency which may be mingled with other currency packets in the cash drawer of a bank, convenience store or other such commercial institution. The transmitter is automatically activated by unauthorized removal from the cash drawer or other place of safekeeping. The signals from the transmitter activate alarms in one or more receivers located in police vehicles in the area. The receivers employ phase comparison techniques to indicate relative direction and distance to the transmitter thereby facilitating apprehension of the possessor of the packet.

Abstract: A flat cathode ray tube device is provided for display of information by response to an electron beam of a phosphor coating on a face plate. A monolithic structure includes an x-y matrix of electron source cathodes and a pair of grid arrays successively spaced from the matrix with holes therethrough adjacent to and aligned with the cathodes selectively to form and individually control the intensity of an electron beam from each of said cathodes. Deflection control structure has holes through which the beams may pass with a set of x-y deflection electrodes associated with each of the holes for x-y control of the trajectory of each of the beams. A support plate forms the base of the monolithic structure with the cathodes mounted thereon and a face plate structure marginally sealed to the support plate provides a vacuum tight envelope housing the monolithic structure.

Abstract: A thermal line printer includes a semiconductor chip for control of A .times. N heaters arrayed in N groups past which thermally sensitive paper is stepped B times in printing a line of characters in an A .times. B dot matrix. A sequential access memory stores N multibit words, one word for each character to be printed on a given line with a commutator cyclically to read words from the memory A .times. B times for each line to be printed. A ROM has an A .times. B dot matrix code therein for each available character. A time sequencer and decoder connected to the ROM is synchronized with the commutator to produce a different one bit output from the ROM each time each given word is read from memory. A set of N enable circuits leads from the ROM to N groups of heaters. A set of A enable circuits leads from the sequencer to A groups of heaters where one heater in each A group is from one of the N groups.

Abstract: The peripheral boundary of a plane pn junction of a semiconductor device, for example, the base-collector junction of a transistor, that is required to withstand high reverse voltages in operation of the device is defined by a channel having a side-wall defining the peripheral boundary of the junction. The channel is formed by firstly mechanically cutting a desired contour channel into a surface of a semiconductor body which has the junction formed therein. The channel is then subjected to chemical etching to remove semiconductor material damaged as a result of the mechanical cutting step and the channel is filled with an insulating glass to provide a protective coating over the pn junction and prevent contamination of the junction by a subsequently applied epoxy resin encapsulant for the device.

Abstract: A packaging assembly for magnetic bubble chips comprising at least one module assembly board having a surface to which is secured in a substantially planar array a plurality of magnetic bubble chips for the storing and processing of information. First and second sets of terminals are located on opposed lateral edges of the module assembly board for the routing therethrough of information to and from the chips. First and second mounting boards are provided, each board having a set of receptacles for the soldering thereto of a corresponding set of the terminals. A first coil surrounds the module assembly board and is wound about an axis parallel to that of the plane of the chips for producing a magnetic field parallel thereto. A second coil surrounds the first coil and is wound about an axis perpendicular to that of the first coil and parallel to that of the plane of the chips for producing a magnetic field parallel thereto.