Patents Represented by Attorney Martin M. Santa
  • Patent number: 4697254
    Abstract: Sonar ice thickness measurement comprises transmitting an AM and subsequent CW sonic radiant energy signals from the water toward the sonic signal reflecting ice cap. Reflection of the CW signal from the water-ice interface and reflection from the water-air interface of the modulating frequency, generated by non-linear or parametric effects in the water by the modulated transmit signal, causes the CW signal to be modulated to generate side bands at the modulating frequency on each side of the carrier frequency to provide an FM high frequency signal. Detection of the FM signal determines the time of arrival of the echo of said detected FM signal relative to the detection of the reflected modulated signal from the water-ice interface.
    Type: Grant
    Filed: June 2, 1986
    Date of Patent: September 29, 1987
    Assignee: Raytheon Company
    Inventor: Roger G. Pridham
  • Patent number: 4695766
    Abstract: A traveling wave tube made in accordance with this invention wherein the folded waveguide interaction circuit and the input/output transitions to standard waveguides are made of a single piece of metal such as oxygen-free, high conductivity copper. By manufacturing the folded waveguide circuit and the input/output circuit-to-standard waveguide transition out of one piece of material, VSWR on the order of 1.1:1 is expected for traveling wave tubes intended to operate at 94 GHz. Furthermore, this invention minimizes expensive tooling and labor while providing a higher yield of traveling wave tubes.
    Type: Grant
    Filed: August 1, 1986
    Date of Patent: September 22, 1987
    Assignee: Raytheon Company
    Inventor: John K. Waterman
  • Patent number: 4677342
    Abstract: The cathode and tube of this invention comprise a secondary emission semiconductor cathode in a crossed-field high power amplifier. A gallium arsenide semiconductor doped with an impurity to make it more conductive than intrinsic gallium arsenide has been found to perform better than prior art secondary emission cathodes when it is incorporated as a cathode in a high-power crossed-field amplifier tube operating at high average and peak current. With a gallium arsenide cathode, the crossed-field amplifier tube exhibits a radio frequency output pulse which has fast rise time and much reduced leading-edge jitter relative to performance of the same cross-field amplifier tube having a conventional secondary emission cathode.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: June 30, 1987
    Assignee: Raytheon Company
    Inventors: George H. MacMaster, Lawrence J. Nichols
  • Patent number: 4664459
    Abstract: The cable of this invention comprises a pair of solid, flat, flexible electrical conductors of beryllium-copper attached to a reinforcing webbing of braided nylon. The ends of the conductors are soldered to electrical connector sockets and pins which are supported by glass reinforced resin disks. The webbing is tensioned while being molded inside a water impermeable elastomer which also encompasses the conductors, disks, and end portion of the sockets and pins. A second molding operation covers the water impermeable elastomer with a tough elastomer to form the cable including integral connector bodies incorporating the sockets and pins.
    Type: Grant
    Filed: May 2, 1986
    Date of Patent: May 12, 1987
    Assignee: Raytheon Company
    Inventors: Peter F. Flanagan, Nicholas L. Lizza
  • Patent number: 4661784
    Abstract: A tuning structure for a klystron oscillator is provided by a set of holes extending part way through cavity walls of the klystron. The holes provide weakened portions in the cavity walls which permit an inward depression of the walls at the sites of the weakened portions for adjustment of the central frequency of an oscillation band. Thereby, deformable tuning diaphragms, which are employed for altering the oscillation frequency within the oscillation band, need not be deformed for an oscillation at the center of the desired band. Variations in frequency can thereby be accomplished without metal fatigue, such fatigue having occurred when the diaphragm has been utilized for setting the central frequency of the oscillation band.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: April 28, 1987
    Assignee: Raytheon Company
    Inventors: Arthur W. Kelley, Charles J. Larsen
  • Patent number: 4660162
    Abstract: A pulse duration modulated (PDM) signal is generated from a periodic digitized signal which may be produced by sampling an analog signal of frequency F.sub.s and using a digitizing frequency F where F>>F.sub.s. Linearity of the analog signal between sampling points is assumed. A computer solution of the intercept of the assumed straight line between each pair of successive sample values of the digitized signal and a reference triangular waveform of frequency F/2 provides the time interval between intercepts from which the interpolated pulse duration modulated (IPDM) waveform is generated. A method to add low frequency signals in the IPDM domain, useful for providing Class AD amplifiers with a feedback path and for summations of input signals without converting signals back to analog form, operates on the sum of the respective intercept times of each of the signals. The summed intercept times are used to provide an IPDM signal which represents the sum of the original digitized signals.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: April 21, 1987
    Assignee: Raytheon Company
    Inventor: Allan M. Berlinsky
  • Patent number: 4646321
    Abstract: A pulse duration modulated (PDM) signal is generated from a periodic digitized signal which may be produced by sampling an analog signal of frequency F.sub.s and using a digitizing frequency F where F>>F.sub.s. Linearity of the analog signal between sampling points is assumed. A computer solution of the intercept of the assumed straight line between each pair of successive sample values of the digitized signal and a reference triangular waveform of frequency F/2 provides the time interval between intercepts from which the interpolated pulse duration modulated (IPDM) waveform is generated. A method to add low frequency signals in the IPDM domain, useful for providing Class AD amplifiers with a feedback path and for summations of input signals without converting signals back to analog form, operates on the sum of the respective intercept times of each of the signals. The summed intercept times are used to provide an IPDM signal which represents the sum of the original digitized signals.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: February 24, 1987
    Assignee: Raytheon Company
    Inventor: Allan M. Berlinsky
  • Patent number: 4642802
    Abstract: The transducer of this invention provides a one-to-one input-to-output frequency relationship by the use of different magnetostrictive materials within the same transducer, the materials each having positive and negative strain expansion coefficients. The materials are selectively driven so that the transducer motion is in one direction for one polarity of the sinusoidal drive signal and in the opposite direction for the other polarity of the drive signal. The resultant transducer is capable of greater peak-to-peak excursion of the radiating face for the same length of magnetostrictive material than in the prior art biased-material transducer.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: February 10, 1987
    Assignee: Raytheon Company
    Inventors: William M. Pozzo, John L. Butler
  • Patent number: 4638468
    Abstract: A composite layered assembly of piezoelectric polymer layers and printed wiring layers are configured so that plated-through holes make electrical connection from the outputs of a plurality of polymer hydrophones formed on one or more polymer layers to a plurality of output conductors on a single plane after each hydrophone output is amplified in its associated amplifier.
    Type: Grant
    Filed: August 3, 1984
    Date of Patent: January 20, 1987
    Assignee: Raytheon Company
    Inventor: Samuel A. Francis
  • Patent number: 4634992
    Abstract: A microwave circuit for combining the high output power of two phase and amplitude controllable amplifiers (e.g. magnetron amplifiers) is described. The circuit uses a "Magic T" circuit to reduce the magnitude of the amplified power which must be dissipated by a low-power ferrite circulator connected between the input signal source and the Magic T. Phase and amplitude comparators are used to control the amplifiers so that they may be combined in the Magic T.
    Type: Grant
    Filed: June 26, 1985
    Date of Patent: January 6, 1987
    Assignee: Raytheon Company
    Inventor: William C. Brown
  • Patent number: 4631747
    Abstract: A digital sound synthesizer produces a variable spectral line width to synthesize tones by accumulating phase quanta sequentially for each of a set of tone samples. The rate of accumulation of phase for each tone is randomly altered with preset values of phase increment to broaden the spectral line. The broadened spectral lines provide a display with a spectral presentation of sounds more closely resembling naturally occurring sounds. The embodiment shows how one-hundred non-harmonic frequencies can be generated (using integrator 64), each of which can be independently amplitude controlled and band-width modulation controlled using random deviation of a sine wave.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: December 23, 1986
    Assignee: Raytheon Company
    Inventor: Arthur J. Tardif
  • Patent number: 4630068
    Abstract: A thermal head drive circuit with the input connected to a source of printing data and the output connected to a thermal head including a linear array of heater elements improves the printing speed of a thermal head recording apparatus when printing successive lines. Improved printing speed is effected by simultaneously energizing each heater element with the time of energization for any one heater element being determined by the shade of gray to be produced by that one heater element.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: December 16, 1986
    Assignee: Raytheon Company
    Inventor: J. Robert Ims
  • Patent number: 4626217
    Abstract: A broadband doppler simulator is described in which signals from a plurality of hydrophones are simulated by selecting storage addresses of a random access memory whose successive addresses contain samples of an input signal. The range of each hydrophone from the target whose signal it is receiving is determined by the address assigned to the hydrophone relative to the address of the input signal in the random access memory. In order to produce a doppler shift (time compression/expansion), the address of the simulated hydrophone signal is changed with respect to the signal which is being stored in the memory. The rate at which the address of the simulated hydrophone signal is being changed relative to the input signal determines the doppler shift.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: December 2, 1986
    Assignee: Raytheon Company
    Inventors: Arthur J. Tardif, Samuel D. Anthony
  • Patent number: 4603425
    Abstract: A pulse duration modulated (PDM) signal is generated from a periodic digitized signal which may be produced by sampling an analog signal of frequency F.sub.s and using a digitizing frequency F where F>>F.sub.s. Linearity of the analog signal between sampling points is assumed. A computer solution of the intercept of the assumed straight line between each pair of successive sample values of the digitized signal and a reference triangular waveform of frequency F/2 provides the time interval between intercepts from which the interpolated pulse duration modulated (IPDM) waveform is generated. A method to add low frequency signals in the IPDM domain, useful for providing Class AD amplifiers with a feedback path and for summations of input signals without converting signals back to analog form, operates on the sum of the respective intercept times of each of the signals. The summed intercept times are used to provide an IPDM signal which represents the sum of the original digitized signals.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: July 29, 1986
    Assignee: Raytheon Company
    Inventors: Allan M. Berlinsky, Edward F. Regan
  • Patent number: 4571552
    Abstract: Phase locking of the output signal of a magnetron with a frequency source signal is obtained by a phase comparison of the output signal and source signal to obtain an error signal which energizes a winding of the magnetron magnet to thereby change the flux experienced by the magnetron tube operating in conjunction with frequency pulling of the magnetron output signal by the source signal coupled to the magnetron by a three-port circulator.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: February 18, 1986
    Assignee: Raytheon Company
    Inventor: William C. Brown
  • Patent number: 4562380
    Abstract: A tilt-angle electron gun provides a conical beam of electrons for injection into an axially aligned magnetic field of a gyrotron tube. The beam is formed by an electrostatic lens system for focussing and accelerating the electrons within a magnetically shielded region. The conical beam is substantially monoenergetic and laminar so that after injection into the magnetic field the resulting hollow beam has gyrating electrons which have an axial velocity spread sufficiently low for high efficiency gyrotron amplification.
    Type: Grant
    Filed: June 13, 1983
    Date of Patent: December 31, 1985
    Assignee: Raytheon Company
    Inventor: Norman J. Dionne
  • Patent number: 4542708
    Abstract: A fairing segment for a cable is of composite construction which combines an elastomeric fairing body with a flexible spring-steel clip in the fairing nose. The elastomeric body allows the fairing nose to conform to the cable catenary in the flow stream, presents a smooth leading edge of the flow, and reduces drag. The clip is flexible in the direction of the plane of the fairing to conform to bending of the cable over sheaves or in the water. The spring steel clip allows the fairing to freely rotate about the cable and to align with the flow stream by maintaining low interfacial friction between the cable and the fairing. The clip also minimizes or prevents cold flow of the elastomeric nose portion of the fairing segment into the interstices of the cable armor. The tail portion of the elastomeric body is stiffened to prevent cupping or bending which would cause kiting of the cable.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: September 24, 1985
    Assignee: Raytheon Company
    Inventors: Robert R. Holcombe, Steven G. Parks, Patrick M. Brogan
  • Patent number: 4531799
    Abstract: A pneumatically controlled electrical test connector contains spring loaded pins whose ends are brought into electrical contact with the opposing ends of corresponding connector pins of an electronic module. The pins of the pneumatically controlled connector have recesses in one of their ends to center the ends of the module connector pins. Pneumatic cylinders produce substantial force between the opposing pins of the test and module connectors to thereby cause good electrical contact at the contacting pin ends. The spring on each pin accommodates the mechanical tolerances of the pin lengths and causes the force on each pin to be substantially equal. Commercially available connectors are slipped onto the other ends of the test connector pins for wiring of the test connector to a test set.
    Type: Grant
    Filed: March 9, 1984
    Date of Patent: July 30, 1985
    Assignee: Raytheon Company
    Inventor: George G. Gray
  • Patent number: 4531468
    Abstract: A bladder shaped to conform to the form of the sonar transducer housing of a torpedo in which it is located compensates for volume changes because of temperature changes of the oil which fills the transducer housing. The bladder also compensates for the change in water pressure produced by the depth at which the torpedo is operating. The bladder is sufficiently stiff so that it maintains a predetermined shape substantially midway between its fully extended and fully compressed position during the time that the housing is air evacuated and then filled with oil at near atmospheric pressure. The bladder is thus capable of expanding or contracting to accommodate changes in the volume of the contained oil as the temperature of the oil changes. The bladder is preferably made of a material without substantial spring force or stretch.
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: July 30, 1985
    Assignee: Raytheon Company
    Inventor: James F. Simon
  • Patent number: 4523145
    Abstract: Apparatus is provided for the automated handling and testing of semiconductor electronic modules which are stored in successive slots along the length of a magazine or container. The magazine is moved lengthwise in step-wise fashion and indexed to cause each module to assume in succession a position over an electrical connector. The connector is mechanically moved to make electrical contact with the electrical connector of the module. The module is thereby connected to an electrical test set which tests the module and provides a signal indicating whether the module has passed or failed and the module is so marked. The modules sequence through the test procedure until all have been tested, at which time the magazine is returned to its initial position.
    Type: Grant
    Filed: July 7, 1982
    Date of Patent: June 11, 1985
    Assignee: Raytheon Company
    Inventor: George G. Gray, Jr.