Patents Represented by Attorney Bruce L. Lamb
  • Patent number: 4648099
    Abstract: A digital minimum shift keyed modulator (MSK) has been described incorporating a code generator for generating a plurality of bits in series representative of a spreading function, an Exclusive OR circuit for multiplying two successive bits, a memory for holding predetermined constants, timing circuitry, a digital-to-analog voltage converter and a bandpass filter. The invention overcomes the problem of variations over frequency and temperature associated with previous MSK modulator designs.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: March 3, 1987
    Assignee: Allied Corporation
    Inventor: Leo A. Kerr
  • Patent number: 4648098
    Abstract: A minimum shift keyed reference signal generator is described (FIG. 3) incorporating a shift register, for holding a spreading function, a first and second memory for holding in-phase and quadrature weights, a counter for addressing the first and second memory and first and second Exclusive OR circuits for combining the weights when addressed by the counter with the spreading function held in the shift register. A minimum shift keyed correlator is described (FIGS.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: March 3, 1987
    Assignee: Allied Corporation
    Inventor: Leo A. Kerr
  • Patent number: 4647926
    Abstract: A system to provide warning whenever unreliable data is being received by an airborne receiver for a microwave landing system. The received data is tested against certain criteria to determine validity. The received data is also tested to determine whether it was received via a direct path or via a multipath reflection. A validity counter records the percentage of valid data received. A multipath counter records the length of time data is received via direct path relative to the length of time data is received via multipath. Both counters control warning flags to cause a warning to be generated whenever the counter contents are below threshold values. The validity counter is set to an upper limit when its count crosses the threshold in a positive direction and is set to a negative limit when its count crosses the threshold in a negative direction.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: March 3, 1987
    Assignee: Allied Corporation
    Inventors: Walter L. Devensky, Wayne H. Martin
  • Patent number: 4639732
    Abstract: The circular phased array antenna includes a plurality of radiating elements spaced about the circumference of a mounting ring. The radiating elements are fed with r.f. currents having relative phase and amplitude distribution to form a focused beam from the antenna. The beam is steerable to a selected direction. The monitor system includes a probe element mounted near each radiating element, phase shifters and couplers for combining signals from the probes into a transmission line. The amplitude of the transmission line signal is compared with a known value of signal for a normally operating antenna for each beam direction. A failure alarm is generated whenever the difference between the compared signals exceeds tolerance.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: January 27, 1987
    Assignee: Allied Corporation
    Inventors: Joseph H. Acoraci, Alvin W. Moeller
  • Patent number: 4636674
    Abstract: A stator adapted for mounting adjacent the periphery of a moving machine gear, whereby the gear serves as a rotor in an electric alternator. A pair of elongated pole pieces are mounted in parallel adjacent the gear periphery. Dependent teeth are formed on each of the ends of each pole piece. The ends of the teeth of the pole pieces are separated from the gear tooth tips by a short air gap. The pole pieces are of length such that when the teeth at one end of a pole piece overlie gear tooth tips, the teeth at the opposite end of that pole piece overlie spaces between gear teeth. The pole pieces are displaced longitudinally relative to one another so that when the teeth at one end of one pole piece overlie gear tooth tips, the teeth at the like end of the other pole piece overlie spaces between gear teeth. Magnets are positioned between the pole pieces, one at each end. Gear motion induces electrical potentials in conductor coils wound on the pole pieces.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: January 13, 1987
    Assignee: Allied Corporation
    Inventor: Arnold D. Peterson
  • Patent number: 4635221
    Abstract: A spread spectrum communication system is described for decoding data from a signal having a carrier frequency and at least one of a plurality of predetermined orthogonal modulations thereon incorporating a frequency synthesizer for generating a plurality of frequencies, a plurality of mixers, a combiner, a broadband convolver, a second combiner coupled to a reference signal generator for generating respective orthogonal modulations on spaced apart carrier frequencies, a power divider coupled to the output of the convolver and filters each having a frequency passband for recovering or separating the output signals of the convolver. The invention overcomes the problem of requiring a plurality of broadband convolvers to decode a plurality of orthogonal modulations of lesser bandwidth.
    Type: Grant
    Filed: January 18, 1985
    Date of Patent: January 6, 1987
    Assignee: Allied Corporation
    Inventor: Leo A. Kerr
  • Patent number: 4617678
    Abstract: A circuit is described for recovering binary data from an input signal which may be phase coded and received intermittently and nonsynchronously incorporating an edge detector for detecting transitions of the data from a 0 to a 1, a counter which may be reset upon detection of a data transition, a second counter which may be reset upon the first counter reaching a predetermined value, the second counter being permitted to free run up to a predetermined value, a circuit for generating data in synchronous with the output of the second counter, and a squelch circuit for inhibiting the output of the generated data in response to output of the counters.
    Type: Grant
    Filed: July 27, 1984
    Date of Patent: October 14, 1986
    Assignee: Allied Corporation
    Inventors: Walter L. Devensky, Carlos M. Dube
  • Patent number: 4599609
    Abstract: A personal liquid chemical agent detector incorporating a sensor which changes resistance in response to contact with liquid, first and second switches which function as pins for attaching the detector to the wearer and as electrical switches, a battery, a resistor, and a detector and alarm circuit. A conductor incorporating a resin, conductive flakes and dye crystals selected which are solvent in selected chemical agents. A conductive paint incorporating a resin, conductive flakes a dye solution including one or more volatile solvents and a plasticizer. The invention overcomes the problem of requiring additional switches for manual testing of the detector and battery prior to use and for disconnecting the battery after use at times the detector is removed by the wearer. The invention further overcomes the problem of independent verification of detection by providing a conductor with concurrent electrical and visual appearance responses to selected chemical agents absorbed by the conductor.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: July 8, 1986
    Assignee: Allied Corporation
    Inventor: William C. Blanchard
  • Patent number: 4597299
    Abstract: A gas tight cell receives an unmetered stream of sample gas. The cell is divided into a reaction chamber, as drift chamber and an ion collector chamber by transverse shutter grids normally carrying an ion repellent charge. The inlet of a chromatograph analytical column is connected to the outlet of the cell ion collector chamber. Inert gas admitted to the ion collector chamber is divided into a drift gas stream and into an oppositely directed carrier gas stream. The drift gas flows from the collector chamber through the drift chamber and out the reaction chamber. The carrier gas flows from the collector chamber through a deionizer into the chromatograph column. An electrostatic field urges sample gas ions from the reaction chamber toward the ion collection chamber. The ions are blocked from entering or exiting from the intervening drift chamber by the charge on the shutter grids.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: July 1, 1986
    Assignee: Allied Corporation
    Inventors: Donald N. Campbell, Kishore N. Vora, Robert C. Davis, Jr.
  • Patent number: 4595486
    Abstract: An electrochemical gas sensor is described for detecting a gas constituent, for example hydrazine in a gas ambient incorporating an electrochemical cell including a reference electrode, counter electrode and sensing electrode spaced apart and with an electrolyte in contact with each electrode and comprising n-methyl-2-pyrrolidone and a salt soluble therein, for example tetraalkyl ammonium salt. The invention overcomes the problem of specificity, service life and operating temperature range associated with aqueous electrochemical gas sensors.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: June 17, 1986
    Assignee: Allied Corporation
    Inventors: John C. Schmidt, Donald N. Campbell, Sandra B. Clay
  • Patent number: 4593340
    Abstract: A spark discharge igniter for gas turbine engines and the like. The igniter includes a tubular metal shell and a relatively long ceramic insulator inserted in the shell and rigidly secured to the shell near one end thereof. A metal collar is fitted tightly between the insulator and shell at the end opposite the rigidly secured end. The collar is initially in the form of a split ring installed on the insulator prior to assembly of the insulator into the shell. The ring is extruded into the tightly fitting collar in the course of inserting the insulator into the shell.
    Type: Grant
    Filed: August 13, 1985
    Date of Patent: June 3, 1986
    Assignee: Allied Corporation
    Inventor: Helmut P. Meyer
  • Patent number: 4554547
    Abstract: A range processor for airborne distance measuring equipment in which coherency of reply signals from the ground based DME station is determined by incrementing the contents of storage locations of a random access memory device for each reply signal according to the time of reception of the reply signal and for decrementing the contents of the storage location if no reply signal is received. Whenever the contents of a storage location exceeds a threshold value a range gate is generated so that the next reply received within the range gate causes the time of reception of the reply to be stored as range data.
    Type: Grant
    Filed: December 13, 1982
    Date of Patent: November 19, 1985
    Assignee: Allied Corporation
    Inventors: Brendan J. Spratt, David J. Pryor, James B. Jones, Jr., Dennis W. Davis, Richard V. Frazier, Jr.
  • Patent number: 4532517
    Abstract: In a microwave landing system the individual words of a train of command words generated by the antenna beam steering unit are applied to a polynomial generator where each is, seriatim, summed with a polynomial check word generated in a previous operation. The result is shifted once toward the most significant bit to increase the degree of the resultant polynomial. Division by a predetermined generator polynomial is accomplished and the remainder is stored as the check word to be used in the next to follow operation. The check word polynomials are compared at preset intervals with stored check words to monitor the train of command words.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: July 30, 1985
    Assignee: Allied Corporation
    Inventors: Edward F. C. LaBerge, Robert K. Calzetta
  • Patent number: 4527522
    Abstract: An ignition timing control system for an internal combustion engine (18) varies the timing of a magneto (14) in accordance with a pre-programmed ignition advance schedule. An optical pick-up (22) senses the passage of slots (26) in a disc (24) which is rotated at the speed of a distributor (16) and produces constant angular width reference pulses corresponding to fixed ignition timing in the engine's cylinders (13). A magnetic pick-up (36) detects incremental rotation of the engine's crankshaft (33) and produces timing control signals proportional to engine speed. The timing control signals and reference pulses are converted to a multi-bit data word which is used to synthesize an analog control function representing variable ignition timing using a pre-programmed digital to analog converter (58).
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: July 9, 1985
    Assignee: Allied Corporation
    Inventor: Robert S. Cerny
  • Patent number: 4525266
    Abstract: An electrochemical gas detection cell, particularly suitable for detecting H.sub.2 S, includes an electrochemical gas sensor which has a reference electrode, a sensing electrode and a counter electrode. The counter electrode is composed of carbon. The sensing electrode is composed of either gold or platinum and the reference electrode is composed of platinum. Circuitry is provided to supply voltage to the electrodes, the sensing electrode bias can be held below 300 mv., with respect to the reference electrode. The agent H.sub.2 S can be readily detected when the bias is about 250 mv. The cell is associated with signal processing circuitry which produce audible and visual outputs. A nonaqueous electrolyte is provided. The electrolyte may be composed of either propylene carbonate or n-methyl-2-pyrrolidone and one of conductive compatible salts, such as tetrabutyl ammonium tetrafluoroborate.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: June 25, 1985
    Assignee: Allied Corporation
    Inventors: John C. Schmidt, Donald N. Campbell, Sandra B. Clay
  • Patent number: 4525704
    Abstract: An enzymatic toxic gas sensor 10 having a plurality of parallel planar surfaces and a buffered electrolyte reservoir 44. The buffered electrolyte is conveyed by means of diffusion to a substrate 28 to dissolve the substrate. The substrate diffuses to an immobilized enzyme where it is hydrolyzed if the enzyme is active. An electrochemical cell continuously monitors the hydrolyzed substrate concentration which is an indication of the enzymatic activity and presence of toxic gas. A circuit means responds to the current output of the electrochemical cell to indicate the presence or absence of a toxic gas. The shelf life of the sensor is extended by means of a separator for maintaining the enzyme dry and inactive. The enzyme in the preferred embodiment is acetylcholinesterase (AcHe).
    Type: Grant
    Filed: November 9, 1983
    Date of Patent: June 25, 1985
    Assignee: Allied Corporation
    Inventors: Donald N. Campbell, John C. Schmidt
  • Patent number: 4503401
    Abstract: A wideband phase locked loop oscillator (PLLO) for tracking the frequency of an altitude signal in an FM/CW type radio altimeter. The phase locked loop oscillator conventionally includes a voltage controlled oscillator (VCO), a phase comparator for comparing the phase of the altitude signal to be tracked with the phase of the VCO output and an error signal amplifier for applying the output of the phase comparator as control voltage to the VCO. The frequency range of the PLLO is extended by changing the natural frequency of the VCO in steps spanning the useful frequency range of the altitude signal. Selection of the proper value of VCO natural frequency is effected through microprocessor directed digital control.
    Type: Grant
    Filed: August 4, 1982
    Date of Patent: March 5, 1985
    Assignee: Allied Corporation
    Inventors: Constantinos S. Kyriakos, Dean S. Maurer, Louis J. Millio
  • Patent number: 4500391
    Abstract: An electrochemical detection cell which includes, in the order named, a stack of components constituted by a first membrane, an electrode carrier having reference and counter electrodes thereon, a membrane support, an electrode carrier having a sensing electrode thereon, and a permselective membrane. Whatman filter papers are positioned between the sensing electrode and both the counter electrode and reference electrode, these being positionable in a central rectangular opening of the membrane support. The cell allows air or gas ambient to address the membranes and effects application of an electrolyte to space between the electrodes by, for example, a wick which extends between an electrolyte-containing reservoir and the Whatman filter papers. A system for detecting a gaseous agent uses the aforementioned detection cell coupled with circuitry capable of applying a fixed DC voltage bias to the reference electrode and superimposing a train of DC voltage pulses on the fixed bias.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: February 19, 1985
    Assignee: Allied Corporation
    Inventors: John C. Schmidt, Clifton A. Sands, Donald N. Campbell
  • Patent number: 4490720
    Abstract: A radar system alternately transmits relatively short and long pulses. The video signals corresponding to the target returns from consecutive pulse transmissions are converted to digital format and then integrated except that radar return signals from targets within a first range resulting from long pulse transmissions are not used for integration.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: December 25, 1984
    Assignee: The Bendix Corporation
    Inventor: Daryal Kuntman
  • Patent number: D282531
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: February 11, 1986
    Assignee: Allied Corporation
    Inventors: John C. Schmidt, Eugene F. Fafaul