Abstract: A tool for removing from a housing a tri-lead cable having an end terminal removably retained in the housing and having a portion covered by an encapsulating film which extends partially into the housing. The tool comprises a hollow elongated body member having a spring-biased plunger mounted therein. A spring hook blade is attached to the plunger and extends out an open end of the body member. The spring blade is adapted to be inserted in between the housing and the encapsulating film to hook onto an edge of the film. Grasping means are provided on the body member for compressing the spring-biased plunger to retract the spring hook blade and remove the hooked tri-lead cable from the housing.

Abstract: A vapor deposition method of coating substrates with a material involves evaporating the end of a wire or rod made of that same material. The end of the wire is inductively or radiantly heated to form a molten convex miniscus thereon which serves as the coating source for the substrates.

Abstract: A method for the fabrication of a gallium arsenide (GaAs) metal-semiconductor field effect transistor (MESFET) is described. The method requires the step of providing a semi-insulating GaAs substrate having thereon a layer of n doped GaAs and another layer of n+ doped Ga.sub.1-x Al.sub.x As, the latter being used as a diffusion source for n dopants in selectively doping the n GaAs layer underneath. The fabrication method further includes the step of employing highly directional reactive ion etching on silicon nitride to build insulating side walls thereby to effect the self-alignment of the gate of the MESFET with respect to its source and drain. GaAs MESFET fabricated using this method has its source and drain in close proximity having its gate therebetween. Utilizing the disclosed method, conventional photolithographic techniques can be employed to produce submicron self-aligned GaAs MESFETs.

Abstract: The security of manufactured apparatus is enhanced through reducing the motivation for theft by partitioning the design of the manufactured apparatus so as to provide a component essential to the operation that is destroyed both in function and in appearance on moving the apparatus, is clearly distinguishable from a common article of commerce and cannot be singly, economically produced. The security is enhanced because theft is not profitable since a cost equal to any profit is incurred to replace the destroyed part and chance of detection is increased. Small apparatus theft, such as occurs with a typewriter, is rendered impractical by providing a power cord that is distinctive in appearance, not economically singly replaceable, that is so fastened that it must be fractured in order to remove the apparatus.

Abstract: A servo system provides track following servo information from a buried servo layer disposed under the data recording layer, using the same transducer for simultaneously reading the servo information and writing data. To prevent the voltage generated in the transducer while writing data from masking out the servo information, a dummy voltage having the same magnitude as the transducer voltage is connected so that it cancels the write data voltage in the head.

Abstract: A method and apparatus for correction of non-impact printed material which is formed by depositing a thermoplastic marking material on the print sheet. The method and apparatus uses a correction tape or ribbon comprising a substrate which carries a pressure transferable pigmented material on one face. The correction ribbon is positioned between the erroneously printed character and a correction device which is actuated to produce sufficient pressure to move the correction ribbon into intimate contact with the erroneously printed character, and the pigmented material is transferred selectively only to the character area to cover the erroneously printed character, so that the correct character can then be printed. In an alternate embodiment, the correction device is actuated concurrently with a backspace operation.

Abstract: A single track magnetic head assembly comprises a nonmagnetic base, a magnetic layer disposed on one surface of said base, a nonmagnetic top closure positioned adjacent to an upper portion of said magnetic layer, and a magnetic bridge section positioned adjacent to the lower portion of said magnetic layer and below said top closure. A prewound coil is attached to the bridge section. The base, the magnetic layer and the top closure have arched sections to allow accurate definition of the throat height, and to enable testing of magnetic and physical properties of the magnetic head during the assembly process.

Abstract: A printhead assembly with a replaceable stylus insert provides for compact connection of contact pads by staggering the contact pads an offset distance that is significantly less than the pad dimension in the direction of offsetting. Preferably the offsets are symmetrically arranged about a reference line and connections are coordinated relative to the reference line so that conductor overlaps are avoided. A compressable means applies pressure to urge the contact pad into intimate engagement and ribs formed in one or both of two clamping sections concentrate pressure along alignments of contact pads.

Abstract: Reels of magnetic tape used in a reel-to-reel drive system suffer from an inter-layer slip if the reel has gone through environmental changes. This slip will cause errors to occur in the reading of the tape, since a constant tension and velocity and an accurate position is required in the reel-to-reel drive. To check whether the tension of the tape needs to be refreshed, the end of the tape is firmly held while the hub is driven in a reverse direction against the firmly held end of the tape. A detected reverse rotation indicates an inter-layer slip condition. The tape tension must be refreshed by unreeling the tape and rereeling with the correct tension applied. The reel of tape is then ready for operation.

Abstract: A method of providing self-passivating interconnection electrodes for semiconductor devices which provides low resistivity composite polysiliconsilicide electrodes. In the method the formation of oxidation induced voids in polysilicon underlying the silicide is eliminated by deposition of polysilicon and stoichiometric proportions of silicon and a silicide-forming metal. These steps are followed by deposition of a silicon layer having a thickness determined to provide between 30 and 100 percent of the silicon required to form a silicon dioxide passivation layer. Subsequent thermal oxidation of the layered electrode structure provides a self-passivated structure useful for fabrication of silicon gate MOSFET devices as well as other integrated circuit structures.

Abstract: In a method for the generation, without dead time, of pulses appearing in successive pulse intervals, with a high time resolution of the pulse intervals and of the pulses, the signals characterizing start (IIN1A, IIN2A) and end (IIN1E, IIN2E) of a pulse interval are generated under storage control by an oscillator (1) for giving coarse time raster values, and a delay circuit (3, 4) series-arranged with the oscillator (1) and with selective (7, 8) delay circuit taps (5, 6) for giving fine time raster values. The signals characterizing the pulse intervals are alternatingly applied to one of two paths (path I, path II), such that the signal characterizing the respective pulse interval start coincides with the coarse time raster predetermined by the oscillator (1). For each path, the leading and trailing edge of a pulse to be generated within a pulse interval is derived via oscillator clock-driven counters (45, 47, 46 and 48) loadable with a count, upon a specific count being reached.

Abstract: Bank for accommodating adjacent ram units, each of which consists of a flat, narrow frame. An electromagnetic actuator for a ram, which is guided in two bores of the frame, is positioned in a recess of the latter. For accommodating and guiding the individual ram units the bank has a substantially U-shaped cross-section. At least on one of its two ends, the frame of each ram unit is provided with a flexible pin arranged between two frame sections. The frames are detachably mounted between the U-sections of the bank. Both U-sections have recesses for positively and/or non-positively accommodating the front or rear frame part and the pin, respectively.

Abstract: Apparatus for incremental feeding of a paper web from an arborless supply roll over a transverse dancer bar resiliently supported at each end with the respective supports having different and variable spring rates to effect uneven pulling of the web during feeding and thus jogging of the supply roll. This action maintains a tight wrap of the outer layers of web on the roll and aids in maintaining web alignment during feeding.

Abstract: The present invention provides a method for planarizing a non-uniform thickness of oxide, for example silicon dioxide as is formed over oxide-filled trenches used in deep dielectric isolation in integrated circuits. The oxide is removed by a planarizing resist-etching process so that etching in thicker resist areas proceeds at a rate slower than etching in thinner resist areas. A referred etchant is HF gas and etching is preferably at an elevated temperature.

Abstract: A method for eliminating deposited residues, for example polysilicon residue, on vertical silicon dioxide sidewalls that have been reactive ion etched includes reshaping the sidewalls to have a slope of at least +30.degree. relative to the vertical direction of the sidewall.

Abstract: A photoresist that has strong resistance to reactive ion etching, high photosensitivity to mid- and deep UV-light, and high resolution capability is formed by using as the resist material a copolymer of methacrylonitrile and methacrylic acid, and by baking the resist before the exposure to light for improved photosensitivity, and after exposure to light, development, and prior to treatment with reactive ion etching.

Abstract: A replaceable font module for a printer includes an interrogable storage containing information representing graphic patterns and is connected to cooperate with a printer upon insertion within a corresponding receptacle. The module and receptacle are configured to allow insertion without intense operator attention by virtue of a camming surface on the module that cooperates with a hook-like latch of the receptacle to provide an undulating but positive latching motion in response to a simple operator insertion motion. As a part of the latching motion, a wiping action to assure a high quality contact with conductor pads on the module that provide a transfer point for the communication path to the storage.

Abstract: An improved centrifuge assembly comprising a channeled rotor assembly and a fluid container disposed in the channel, whereby the centrifugal separation effects in the fluid container are determined by the geometry of the channel in the rotor. This arrangement is particularly useful for two-stage blood platelet separation. The fluid container is preferably formed from semirigid plastic material and is considered a disposable item to be discarded after a single use. The rotary assembly preferably includes a removable filler piece or center piece formed from a single piece of material, such as rigid plastic, as by machining or molding, and having therein an open-topped channel having dimensions appropriate to receive the semirigid container, which is suitably curved and placed in the channel. Fluid connections are provided from each end of the container and an intermediate point to an axially located multichannel rotating seal. The connections lie in a plurality of radial slots in the filler piece.

Abstract: A method for marking a mask set to insure minimum mismatch between the masks when they are assembled into a set. Each mask in the set is evaluated against a known fixed standard, identified and marked such that when the set is assembled and utilized to produce an integrated circuit minimum mismatch between each element in each mask in the set will be realized.

Abstract: A multi-function document processor, including proof inscribing and sorting functions. The document feed station keyboard, and stacker are connected in such a fashion so as to allow easy access to each of these machine elements by an operator without leaving a seated position. The advantageously accessible arrangement of functional elements is achieved by a novel use of rotary document processing stations, resulting in a folded transport path of significantly shorter length, and a transition station for moving the documents from a first plane into a second plane for more compact stacker pocket orientation. Document travel through the improved transport and into the stacker pockets is controlled by logic in the form of a plurality of microprocessors communicating via an okay to send wire.

Abstract: A shared time-of-day (TOD) clock modification bit is used in a multiprocessing system in which the timing facilities in two or more CPUs are implemented as a function of a single TOD clock. This bit helps avoid timer errors that occur as the result of one central processing unit (CPU) changing the TOD clock value while another CPU is executing an instruction which determines a CPU timer value. Whenever the microcode in any one of the CPUs reads the TOD clock, it obtains the Shared TOD Clock Modification Bit in addition to the TOD value. This bit indicates if the TOD clock read operation just completed is the first such operation executed by that CPU since the TOD clock was updated by another CPU sharing the same TOD clock. If it is, certain instructions take action to correct timer errors introduced by the change in the TOD clock value.

Abstract: A multibeam matrix array cathode ray tube having diminished rotational and focused distortion. In a multibeam cathode ray tube having a flat or planar electron beam emitter means arranged to project a two-dimensional array of beams, deflection means and stigmator correction means are provided. In addition, a novel split focus coil is provided for correcting distortion due to undesired rotation of the array of beams. By dynamically supplying opposing currents in the two halves of the split focus coil, rotational distortion may be compensated for, while adjustments are automatically made for changes of focus due to the introduction of rotational correction. Correctional currents are dynamically supplied to the split coils as a function of the matrix beam displacement on the cathode ray tube face.

Abstract: The output (18) from an optical sensor is recharged for a time dictated by the output of the digital-to-analog converter (11). A previous count indicative of the recharge time is stored in memory (52) which controls the converter (11). This count is manipulated in incrementing circuit elements (54) (70 and 72) depending on the time the comparator (12) signals a difference signal, indicative of a period of recharge.

Abstract: A recirculating loop memory array is disclosed adapted for the parallel as well as serial fetching and storing of data while requiring only a single input and single output data terminal. Each loop of the array is provided with a shift register stage for parallel data accessing. A particular recirculating bit in all of the loops can be fetched in parallel into their respective shift register stages and, conversely, the bits stored in the shift register stages can be loaded in parallel into predetermined recirculating bits of their respective loops. The shift register is operated at high speed so that it may be completely loaded or unloaded during the interval between successive steppings of the loops.

Abstract: This invention provides improved non-volatile semiconductor memories which include a volatile circuit coupled to a non-volatile device having a floating gate and first and second control gates capacitively coupled to the floating gate with a charge injector structure disposed between the floating gate and one of the two control gates. The volatile circuit may be a dynamic one-device cell or a static cell such as a conventional flip-flop or latch cell.

Abstract: Disclosed is a simplified method of producing semiconductor device structures in an integrated technology using at least one ion implantation step. Implantation of the doping ions into a silicon wafer, for example, for producing a subcollector or an emitter, is not effected, as previously, in an ultra-high vacuum atmosphere through a thin protective layer of silicon dioxide which is applied by a separate thermal oxidation step prior to implantation, but the doping ions are directly implanted into the bare silicon wafer. The latter implantation is effected in an atmosphere of increased partial pressure of oxygen. Enhanced diffusion of the oxygen adsorbed at the surface occurs into the vacancies which are generated by the implanted doping ions close the surface of the silicon wafer. In this manner a silicon dioxide protective layer is formed already in the initial stage of ion implantation.

Abstract: A centrifuge assembly useful for two stage blood platelet separation by counterflow comprising a channeled rotor assembly and a fluid container disposed in the channel, whereby the centrifugal separation effects in the fluid container are determined by the geometry of the channel in thr rotor. The fluid container is preferably formed from semirigid plastic material and is considered a disposable item, discarded after a single use. The rotor assembly preferably includes a removable filler piece or center piece formed from a single piece of material and having therein an open-topped channel having dimensions appropriate to receive the semirigid container, which is suitably curved and placed in the channel. Fluid connections are provided from a multi-chambered cavity attached to the ends of the container to an axially located multichannel rotating seal.

Abstract: Two memory cells each can be entirely fabricated in only two isolation beds. In one embodiment each bed contains one lateral PNP and one vertical NPN transistor in a merged structure. In a second embodiment, each bed contains one lateral PNP and two vertical NPN transistors in a merged structure. Memory access circuitry provides a high ratio of selected to unselected cell current in order to permit fast memory operation.

Abstract: For record carrier material, the front and the back sides of which are provided with a lacquer layer and the front side of which is coated with an aluminum layer, one of the two lacquer layers is admixed with a material, such as metal azide, which forms a metal radical suitable for reacting with fatty acids, while at least one of the lacquer layers is admixed with a fatty acid or a mixture of fatty acids.

Abstract: Production of a sintered ceramic dielectric formed from a green sheet having a uniform microporous structure providing uniform dielectric properties and compressibility for lamination of stacked green sheets into a unitary laminate which may be provided with an internal pattern of electrical conductors extending therein. The structure is obtained by blending the ceramic particulate in a solution of a binder resin miscible in a solvent mixture which is formed from a volatile solvent for the binder resin and a less volatile solvent in which the resin is at most only slightly soluble.

Abstract: An electron beam exposure system for forming integrated circuit patterns in which pattern data provided by either a control processor or a mass storage device is transferred through a pattern buffer interface which contains a large buffer memory, the reading and writing of which is automatically controlled by read and write logic contained within the interface. Data is transferred to the interface over busses having a data width less than the data width capable of being stored at an addressable location in the buffer memory. Automatic assembly of larger units of data is controlled by logic within the interface which requires only initialization by the control processor. Automatic address sequencing for subsequent data transfers is carried out under control of self-incrementing storage address registers and self-decrementing word count registers.

Abstract: A moving document copier machine with a hinged cover of a recirculating semiautomatic document feed device for pivoting away from the top surface of the machine to expose the document feed path and enable the copying of a book or like object. A spine or rail means is provided along one edge of the document feed path to receive the center break of an opened book. Roll means interior to the document feed path support that portion of the book to be copied as it moves across the viewing station while other rollers, exterior to the document feed path, support that portion of the book not to be copied. A gate is provided to register the book.

Abstract: A method for testing optical imaging systems by the use of moire stripes, wherein two copies of an optical grating are made and simultaneously illuminated to produce a moire pattern which is a measure of the distortion of the imaging system. In a first step an original grating is transferred by a light beam as a contact copy onto a substrate. In a second step, the imaging system to be tested copies the original grating for a second time onto the substrate, except that the second grating copy is rotated slightly with respect to the first grating copy. The points of intersection of the two superimposed gratings produce moire stripes when illuminated, the positions of the stripes being calculated precisely with the assumption that ideal gratings were used. If the imaging system to be tested shows distortions, the position of the moire stripes that are observed will not correspond to these calculated positions. The deviation therefrom is a measure of the imaging system errors.

Abstract: Modularized control system arranged to inhibit operation of a controlled machine if an essential module is not installed. A control signal to a necessary operation, such as starting a controlled machine, is routed to a circuit on an essential module which supplies the control signal to its destination only if the essential module is installed and powered.

Abstract: A wide traveling web is coated on one side thereof by passing the web through a pool of non-Newtonian coating liquid. The pool is replenished by a conduit manifold having at least one inlet port and a plurality of outlet ports. The outlet ports communicate directly with the pool. The inlet port and the outlet ports are interconnected by a plurality of branching conduits. All branching conduits subject the coating liquid to substantially identical flow rheology in that the branching conduits are of substantially equal length and substantially equal fluid shear characteristic.

Abstract: A flash system for fusing or fixing thermoplastic resin such as toner onto an image support sheet includes a pair of flash fusing assemblies disposed in side-by-side relationship. Each assembly includes a reflector with a flash lamp positioned within said reflector. The flash lamps are coupled in parallel to a common energy charging source. The flash lamps are triggered alternatively so that each section of the support sheet is fused by a different lamp. In an alternate embodiment, a single lamp is moved at one half the speed of the support sheet. The lamp is triggered sequentially to fuse the entire sheet.

Abstract: A transaction execution system including at least one transaction terminal in communication with a host data processing system. A transaction at the terminal is authorized based, at least in part, upon correspondence of personal identification data entered by the terminal operator at a keyboard with account identification data read from an account card. When the personal identification data is not derived from the account identification data, the correspondence check is made at the host data processing system by comparison of encrypted identification data with validation data. The host may, upon failure of correspondence, communicate a conditional authorization message to the terminal, which enables the terminal operator to again attempt to enter the correct personal identification data. The host data base stores as validation data encrypted identification data, and only double encrypted identification data appears on the communication lines.

Abstract: A method of forming a wide deep dielectric filled isolation trench in the surface of a silicon semiconductor substrate by forming a wide plug of chemical vapor deposited silicon dioxide in the trench, filling the remaining unfilled trench portions by chemical vapor depositing a layer of silicon dioxide over the substrate and etching back this layer. The method produces chemically pure, planar wide deep dielectric filled isolation trenches and may also be used to simultaneously produce narrow deep dielectric filled isolation trenches.

Abstract: A data security device which includes storage means for storing a master cipher key, cryptographic apparatus for performing cryptographic operations and control means for controlling the writing of a master cipher key into the storage means, controlling the transfer of the master cipher key to the cryptographic apparatus and controlling the cryptographic apparatus to perform cryptographic operations. When a new master cipher key is written into the storage means, the old master cipher key is automatically overwritten with an arbitrary value, after which the new master key may be written into the storage means. The cryptographic apparatus of the data security device includes storage means, a cipher key register and cipher means for performing a cipher function on data stored in the cryptographic apparatus storage means under control of a working cipher key stored in the cipher key register with the resulting ciphered data being stored in the cryptographic apparatus storage means.

Abstract: A process is provided for making a multilayer integrated circuit substrate having improved via connection. A first layer M1 of chrome-copper-chrome is applied to a ceramic substrate and the circuits etched. A polyimide layer is then applied, cured, and developed and etched to provide via holes in the polyimide down to the M1 circuitry. The top chrome is now etched to expose the M1 copper in the via holes. A second layer M2 of copper-chrome is evaporated onto the polyimide at a high substrate temperature to provide a copper interface at the base of the vias having no visable grain boundaries and a low resistance. M2 circuitization is then carried out.

Abstract: A central processor through an asynchronous service processor, selectively resets an input/output channel designated in an instruction called Clear Channel that is executed by the central processor. As part of the execution of this instruction, the service processor also communicates a reset signal to the peripheral equipment associated with that channel in case the designated channel is malfunctioning and cannot relay a reset signal normally to the peripheral equipment associated with the designated channel. The reset signal for the peripheral equipment is supplied through a connection between the service processor and particular lines in I/O interface cables of that channel. Programming routines that use the Clear Channel instruction are designed to preserve the integrity of data held by peripheral equipment that is associted with two channels when the peripheral equipment has exclusive affiliations with the designated channel.

Abstract: A line printer attachment for converting a display screen copier printer to a line printer. The last or extra line of the display is used as the line print buffer. An initiate print signal is generated upon detecting that the last or extra line is to be scanned. The initiate print signal is used to blank or inhibit the serial video data from the display screen and to enable the printer. The serial video data is constantly sent to the printer attachment but is ignored until the printer is enabled. With the printer enabled, printing takes place using the line print buffer data which has been serialized as serial video data. The print buffer data remains unchanged during the entire printing of the line where the printing is done in series of horizontal lines to complete the printing of a line. At the end of each horizontal line of print a vertical screen retrace occurs and the display screen is swept where again the last or extra line is detected and another initiate print signal is generated.

Abstract: A controller is provided for manually actuated movement of a cursor in an interactive display wherein overshoot in the positioning of the cursor when rapid movement is involved is compensated employing a factor involving the user's reaction time and the motion rate of the cursor.

Abstract: Different line-cord sets connect an electrical device to different supply voltages, assuring that the supply voltage matches the device. Each line-cord set has a uniquely keyed socket and a wall plug. A device receptacle receives the line-cord's keyed socket. An adjustable key on the device mates with the socket's key and rejects nonmating sockets to admit the socket into the receptacle and adjusts the device's input voltage to match the supply voltage.

Abstract: A system and method for analysis of circuits which include a large number of circuit elements. Blocks of circuitry which define logical circuit functions such as gates and latches are set up as macromodels. Each macromodel need be represented in its full detail only once. Means are provided to recognize latency, or quiescence, of macromodels so that time may be saved in the circuit analysis when a macromodel is latent.

Abstract: A conductorless swap gate for ion-implanted contiguous-disk bubble devices using a folded minor loop and means for reversing the rotation of the rotating magnetic field is disclosed. The bubble device has a major loop, a folded minor loop, a swap gate containing at least one element positioned between the major loop and the folded end of the minor loop. The swap gate has a first portion for interchanging bubbles with the major loop, a second portion for transferring bubbles from a first region of the folded end of the minor loop, and a third portion for receiving bubbles from the second region of the folded end of the minor loop. Activation of the means for reversing the rotation of the rotating magnetic field causes the swap function to be effected. In a preferred embodiment, the device has a swap gate that has two elements and functions as a true swap gate.

Abstract: A major/minor loop bubble memory system architecture includes a passive replicator in the major loop read channel which is connected by a first path to a mode switch-annihilator and a merge point in the major loop write channel and by a second path to an off-chip decision-making means and the merge point in the write channel. The decision-making means is positioned the same or fewer propagation steps than the mode switch-annihilator is from the replicator. The decision making means is activated to cause either the replicated data to pass through the mode switch-annihilator into the write channel or the replicated data to be annihilated in the mode switch-annihilator and the data from a generator to pass into the write channel.

Abstract: A cardholder of a single element moving carriage typewriter may be modified to accept and accurately position with respect to the print point of the typewriter a correction media holder so that a correction operation may be performed correcting erroneously typed characters. The correction media holder is configured to mate in a precise condition with the modified cardholder and to support a supply and takeup spool of correction media on the holder as well as to cause the deflection of the correction media as it traverses across the region of the print point to present the active or operative face of the correction media to a printed page.

Abstract: A fluorescent lamp is adjusted in illumination intensity by controlling the DC current in the lamp during each alternate direct current flow through the lamp. The magnitude of the current applied to the lamp is set each time the direction of current through the lamp is switched, and the current change between switch times is limited. Inductors are used as current change limiting devices so that in each direction of current flow through the lamp, the current can not rapidly change. The amount of current is set, and the direction of current flow is switched when a current monitor detects that the current through one of the inductors is equal to the current desired for the operating point of the lamp. In this way, uniform selectable illumination levels may be achieved even though the lamp is operating in the negative resistance portion of its resistance characteristic.