Patents Represented by Attorney George E. Roush
  • Patent number: 4169008
    Abstract: Nozzle plates for ink jet recording are produced by etching through silicon and like monocrystalline material wafers which frequently are non-uniform in thickness. The "100" plane surfaces of the wafers are coated with etchant masking material after which a nozzle array pattern is defined on the obverse surface and a similar, but larger and less exacting, aperture array of the same pattern is defined on the reverse surface. The silicon wafer as thus exposed is anisotropically etched from the reverse substantially through to the obverse and thereafter etched completely through the wafer from the obverse by the same anisotropic process. The lateral walls of the nozzles are substantially in the "111" plane of the wafers. The masking material is then stripped from the wafer.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: September 25, 1979
    Assignee: International Business Machines Corporation
    Inventor: Richard H. Kurth
  • Patent number: 4167014
    Abstract: Electronic lead determining circuitry operates to advantage with nonlinear relative movement between a paper record medium and an ink drop projector carrier of ink drop printing apparatus. Electronic lead determining circuitry is arranged for calculating the proper lead times for displacing the normal print enabling signals by factors dependent on the actual carrier positions and the lead for projecting ink drops at the desired positions.Ink drop printing apparatus of the type having a carrier bearing an ink drop projector across a record medium at a velocity relative to the record medium which may be varying substantially--either by design or unintentionally--, and bearing print position location detecting elements, and bearing ink drop projection controlling elements is perfected by controlling electronic circuitry for calculating lead time at a given print position for enabling printing at a predetermined designated print position precisely at the predetermined desired location on the paper.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: September 4, 1979
    Assignee: International Business Machines Corporation
    Inventors: Richard H. Darling, Francis J. Perry
  • Patent number: 4166982
    Abstract: The circuitry is arranged to develop a highly accurate and stable reference electric level voltage and/or current for distribution to a plurality of logical circuits on a semiconductor chip having of the order of a thousand such circuits thereon. An input reference voltage is developed by a source reference circuit and applied to an operational amplifier circuit having "evener" circuitry for substantially equalizing the currents in the input transistors. This evener circuitry is essentially an operational amplifier within an op-amp. It monitors and adjusts feedback voltages. The operational amplifier and evener circuitry drives a reference voltage distribution grid laid out over the semiconductor chip.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: September 4, 1979
    Assignee: International Business Machines Corporation
    Inventor: Warren A. Christopherson
  • Patent number: 4167013
    Abstract: Electronic lead determining circuitry operates to advantage with nonconstant relative movement between a paper record medium and an ink drop projector carrier of ink drop printing apparatus. Electronic lead determining circuitry is arranged for calculating the proper lead times for displacing the normal print enabling signals by factors dependent on the actual carrier positions and the lead for projecting ink drops at the desired positions.Ink drop printing apparatus of the type having a carrier bearing an ink drop projector across a record medium at a velocity relative to the record medium which may be varying substantially--either by design or unintentionally--, and bearing print position location detecting elements, and bearing ink drop projection controlling elements is perfected by controlling electronic circuitry for calculating lead time at a given print position for enabling printing at a predetermined designated print position precisely at the predetermined desired location on the paper.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: September 4, 1979
    Assignee: International Business Machines Corporation
    Inventors: Phillip K. Hoskins, Harmon W. Johnson
  • Patent number: 4163909
    Abstract: This peak detecting circuitry avoids false peak indication while using component circuits of smaller dynamic range and lower voltage energizing power supplies than is possible with contemporary circuitry. The electric wave having peaks for which the times of occurrence are desired, is applied between an erecting (non-inverting) input terminal of a differential amplifying circuit and a point of fixed reference potential. A capacitor is connected between the inverting input terminal of the differential amplifier circuit and the reference point. The differential output of the amplifier circuit is applied through individual amplifier circuits to the capacitor for charging and discharging it in accordance with the instantaneous polarity of the electric wave. A unilateral impedor is interposed in the charging circuit in the form of a diode or a transistor for preventing discharge upon reversal of the electric wave slope. Latching and like circuitry is coupled to the detecting circuitry for indicating the detection.
    Type: Grant
    Filed: August 23, 1977
    Date of Patent: August 7, 1979
    Assignee: International Business Machines Corporation
    Inventor: Jerome D. Harr
  • Patent number: 4156818
    Abstract: Operating circuitry for linear charge launching, non-destructive weighting and non-destructive charge sensing for Charge Coupled Devices (CCD) employs electronic integrating circuitry at the input and output node terminals of the CCD. Feedback circuitry within the integrating circuitry aids in linearizing the signals, in eliminating the non-linear capacitance effect of the depletion regions, and in freeing the design from device parameter variations such as electrode area and absolute values of threshold potential and thickness of insulating layer. The circuitry is adaptable to most conventional CCD and is readily made up of conventional resistance and capacitance elements, of conventional comparing circuits such as differential amplifying or signal repeating circuits, and of conventional summing circuitry.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: May 29, 1979
    Assignee: International Business Machines Corporation
    Inventors: Thomas W. Collins, Karl R. Hense
  • Patent number: 4150757
    Abstract: Increased reliability is afforded with this simplified apparatus for assembling and transporting a loose stack of documents. The documents are stacked on edge upon a pair of pinch rolls, normally stationary. A back plate is provided for supporting the documents in a loose stack, and preferably a foot plate is included for reliability in accepting documents and in forming the stack. Documents from a plurality of asynchronous sources as well as a single source of documents are readily assembled in the desired stack, for example, with the use of a conventional tined stacking or loading mechanism. The apparatus is readily adaptive to operation by computer for determining the particular documents to be stacked and, upon completion of the stacking, for applying a driving force to the rolls for transporting the assembled loose stack of documents between the rolls to the desired destination.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: April 24, 1979
    Assignee: International Business Machines Corporation
    Inventors: Robert J. Laybourn, John J. Lynott
  • Patent number: 4144584
    Abstract: This all electronic extensor circuitry enables any one of a multiple of remote card operated terminals to be individually switched onto an electronic data transmission line formerly accommodating only one such remote terminal. The circuitry is arranged to lock out all but the active terminal for the normal time taken to interchange control signals and to enter data. Circuitry is also included for converting very short incoming control pulse signals to very long control pulses for actuating devices and/or circuitry controlled by the terminal. The terminals are identified by tone signals transmitted over an additional wire line pair. For line lengths greater than 2 kilometers, voice grade telephone lines are preferred, and simplified modems for this purpose are disclosed.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: March 13, 1979
    Assignee: International Business Machines Corporation
    Inventor: Kenneth E. Powell
  • Patent number: 4130739
    Abstract: Dictating apparatus is enhanced for normal and conference speech recording by simple circuitry for detecting "long periods of silence" and compressing the record during these periods, as for example by discontinuing the recording process. Starting and stopping the recording transducing apparatus is a basic concept. Conventional recording apparatus is adapted to function under control of circuitry using available digital circuit modules. Analog speech and like waves are converted to incremental digital form by delta modulating circuitry. "Silence periods" are recognized by digital sensing circuitry coupled to triggering logical control circuitry for operating the recording apparatus only in the presence of desired sound. Basically a predetermined series of indications of "silence" serve to trigger a latching flip-flop circuit for disabling substantially conventional dictating apparatus and the like until the desired sound resumes and the latching circuit is reset for continuing the recording of dictation.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: December 19, 1978
    Assignee: International Business Machines Corporation
    Inventor: Michael A. Patten
  • Patent number: 4123135
    Abstract: This optical system permits larger tolerances in mirror facet pitch angles for rotating mirror line scanning apparatus without the use of expensive lenses having toroidal and like complex surfaces or lenses employing elements that have one cylindrical surface whose center of curvature lies on or very near the axis of the scanned surface. A lens system having a negative cylindrical element with its axis perpendicular to the plane of deflection is employed in a rotating mirror scanning arrangement. The lens system images the rotating mirror surface on the scan line in an azimuth perpendicular to the plane of deflection of the beam while ringing the collimated rays of the light source in the plane of deflection of the beam to focus in the one scan line.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: October 31, 1978
    Assignee: International Business Machines Corporation
    Inventor: Melbourne E. Rabedeau
  • Patent number: 4071903
    Abstract: For a delta modulated signal wave comprising a digital carrier wave modulated by an analog wave and represented accordingly as a bivalued digital data bit stream, a correlation function factor is generated by delaying the bit stream in time by an integral multiple of bits and accumulating the successive individual products over a predetermined number of bits of successive individual bits delayed in time and the corresponding currently appearing bits. The circuitry is extremely simple; readily procurable components only are required. A dual input exclusive OR (XOR) gating circuit is connected to the source of delta modulated signal bit stream and to an N-bit digital binary shift register also connected to the source. A stream of successive bivalued products of the current bits and the time delayed bits over a period of N-bits is obtained from the XOR gating circuit and applied to a bidirectional digital counting circuit from which an autocorrelation function factor is delivered.
    Type: Grant
    Filed: August 4, 1976
    Date of Patent: January 31, 1978
    Assignee: International Business Machines Corporation
    Inventors: Stanley Maurice Head, Constantine Michael Melas
  • Patent number: 4068174
    Abstract: Readily available digital logical circuit components are arranged in circuitry for enhancing demodulation of frequency shifted or phase shifted modulation signals in the presence of a received carrier wave and inhibiting demodulation in the absence of any recognized carrier wave. The circuitry is arranged for measuring the time between adjacent impulses as received including noise impulses which penetrate an input band-pass filter. The preponderance of signal impulses lie within predeterminable limits, however, and the circuitry is arranged for indicating the presence of a data signal despite some noise impulses passing through the filter. The electronic circuit components are conventional and also are readily laid down in semi-conductor structures of the popular types.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: January 10, 1978
    Assignee: International Business Machines Corporation
    Inventor: Lawrence Eugene Svelund
  • Patent number: 4066491
    Abstract: Several tapered viaducts or through-holes of uniform size are simultaneously fabricated by etching in a dielectric plate or substrate. The viaducts, which are designed in particular for nozzles for ink jet printers, have identical orifice widths, irrespective of differences in the thickness of the substrate or dielectric plate or different etch rates in the various areas of the dielectric plate. The holes are first chemically pre-etched until the first hole is about to penetrate through the plate and subsequently sputter etching is applied until all holes have penetrated through the plate, whereby the dielectric plate provides the necessary sputter etch capacity on which a negative bias occurs.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: January 3, 1978
    Assignee: International Business Machines Corporation
    Inventors: Wolf-Dieter Ruh, Gerhard Trippel
  • Patent number: 4065123
    Abstract: Documents are stacked on edge on a bed assembly having a backplate assembly near one end and a slidable backstop assembly aranged to be incremented away from the backplate assembly as the documents fill the stacking space therebetween. The backstop assembly is fixed to and alternately freed from the bed assembly by an escapement assembly coupled therebetween and actuated electrically. Preferably the escapement assembly comprises a pawl and ratchet together with cogged or spurred belts guiding the backstop assembly along the bed assembly. A photoresponsive, or like, assembly is arranged to sense the entrance of documents into the stacking space, and electric reed switches and corresponding actuating magnets are assembled on the backstop and bed assemblies for predetermining an initial increment of stacking space.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: December 27, 1977
    Assignee: International Business Machines Corporation
    Inventors: Fred Victor Arrasmith, Donald George Bruns, John Stuart Moffitt, Stanton Kline Moss
  • Patent number: 4059480
    Abstract: This method of forming viaducts or "through-holes" in semiconductor material for transistor and integrated circuit fabrication and especially for ink jet printing systems forms viaducts of uniform diameter without critical registration of masks.A seed layer of Cr-Au is sputtered onto a silicon-dioxide substrate. The viaducts or holes to be made are imaged by a photoresist process with a 5 .mu. thick photoresist on this seed layer. A 4 .mu. thick gold layer is now applied on the seed layer by a plating process. After the dissolution of the photoresist this layer contains the hole pattern with the holes having the required diameter. In order to make a through-hole, the substrate has to be etched. For that purpose, the bare substrate surface is covered with photoresist and exposed from the back through gold holes, and subsequently developed.
    Type: Grant
    Filed: September 29, 1976
    Date of Patent: November 22, 1977
    Assignee: International Business Machines Corporation
    Inventors: Wolf-Dieter Ruh, Gerhard Trippel
  • Patent number: 4050086
    Abstract: The ideal response expected of an electromagnetic transducer, particularly of the Magneto-Resistive (M-R) type, obtains with signal translating circuitry for amplifying the varying signal produced and for dynamically biasing the transducer for maintaining the transducing operation in the linear portions of the characteristics of both the transducer and the amplifying circuitry. An M-R transducer is connected to the input circuit of alternating signal differential amplifying circuitry for delivering the desired signal at output terminals. The offset voltage across the transducer is compensated by differentially biasing input transistors of the amplifying circuitry. Biasing direct current through and/or voltage across the M-R transducer is controlled by a circuit connected to the output terminal and responsive to the signal thereat for developing a slowly inversely varying unidirectional voltage, preferably within a low pass filter interposed in the control circuit for stability.
    Type: Grant
    Filed: May 6, 1976
    Date of Patent: September 20, 1977
    Assignee: International Business Machines Corporation
    Inventor: Jerome Danforth Harr
  • Patent number: 4025863
    Abstract: The switching circuitry topology is arranged so that the transistors operate in a 1E mode, that is, the voltage across the switching transistors is no greater than the input voltage (E) and at the same time the noise voltage normally generated in regulating circuit arrangements employing transistor switching is greatly reduced. A filter inductor in the primary switching circuit protects the switching transistors from sudden current changes during overload and enables operation of the transistors below the 2E mode. Power is regulated by pulse width control of the switching transistors. One pair of switching transistors is arranged to control the direction of current through the transformer primary winding. Another pair of transistors is arranged for controlling the current in accordance with the width of applied switching pulses.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: May 24, 1977
    Assignee: International Business Machines Corporation
    Inventors: Hobart Atsushi Higuchi, Lawrence Paul Trubell
  • Patent number: 4020281
    Abstract: Almost any Photoemissive Pixel Pattern Display Tube (PPDT) System, such as one for a Photoemmisive Matrix Display Tube (PMDT) display system is capable of supplying an indication of coordinate data for input to data processing systems and the like with this electronic photoresponsive data approximation system. A photoresponsive probe with relatively large optical aperture stop is coupled to suitable electric current amplifying circuitry which in turn is coupled to data resolving circuitry for gating counting circuitry coupled to the display matrixing circuitry for determining the coordinates of the location of the probe in terms of the geometrical dimensions of the display. The probe is arranged for sensing a predetermined differential in photoemission as the cathode ray beam passes through the aperture stop. Conveniently, the aperture stop is circular and from the top the successive intercepted raster scans are longer up to the center of the stop.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: April 26, 1977
    Assignee: International Business Machines Corporation
    Inventor: John Ephraim Davis, Jr.
  • Patent number: 4001771
    Abstract: This electronic perimeter intruder detecting security system is arranged for measuring the differences of propagation times and/or velocities of a plurality of different seismic-like waves simultaneously set up by an intruder at a plurality of sensor stations and for calculating the location, velocity, and frequently for identifying the type of intruder. Provisions are disclosed for screening false alarms or waves emanating from without a guarded zone and for ignoring waves from sources not of interest in guarding that zone.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: January 4, 1977
    Assignee: International Business Machines Corporation
    Inventors: Herman Eugene Amrine, Richard Eugene Baker
  • Patent number: 3983578
    Abstract: This ticket making machine is capable of issuing a single ticket without waste of ticket stock. A web of ticket stock having a magnetic stripe record surface is arranged to be advanced around a rotating carrier having a magnetic recording unit and one ticket (web) parting member arranged internally threof. The web is passed between the rotating carrier and a complementary ticket (web) parting member. The peripheral speed of the rotating carrier is very much greater than the speed of the advancing web, whereby the information is magnetically recorded in close to conventional manner. The one parting member is a double-ended anvil arranged to be rotated into and out of position for parting the web in cooperation with a blade forming the complementary parting member. A camming surface arrangement in the same frame structure as the carrier and web are mounted and a cam follower coupled to the anvil toggles the latter on demand for exerting relatively light force for engaging the two in parting the web.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: September 28, 1976
    Assignee: International Business Machines Corporation
    Inventor: George Edmund Price