Patents Examined by James J. Gill
  • Patent number: 4515016
    Abstract: An elastic surface wave accelerometer having a deformable structure, fixed at one end and providing at its free end a seismic mass. The deformable structure may be an open frame with a single post or a closed frame with two posts. The accelerometer can measure movement of a missile or that of a gravitational field.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: May 7, 1985
    Assignee: Thomson-CSF
    Inventors: Pierre Hartemann, Paul-Louis Meunier, Alain Jacobelli
  • Patent number: 4516115
    Abstract: The present invention provides an improved intrusion detection system of the type in which interruption of a beam of infrared energy transmitted from a transmitter to a receiver generates an alarm signal. The receiver includes a light source which remains unlighted when the transmitter and receiver are properly aligned but will be continuously lighted if either the beam is interrupted or the receiver and transmitter are not aligned. In one aspect of the invention, flasher circuitry in the receiver causes the light source to flash when the transmitted beam is only marginally aligned with the receiver. In another aspect of the invention, a lens in the receiver for focusing infrared radiation on a photodetector is movably mounted and accessible from the outside of the receiver to properly align the transmitted beam with the receiver without dismounting the receiver or requiring the use of any special alignment tools.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: May 7, 1985
    Assignee: Cerberus AG
    Inventors: Raymond A. Frigon, William G. Kahl, Jr.
  • Patent number: 4513618
    Abstract: Method and apparatus for determining the vertical gradient of the vertical gravitational field by a single measurement, for example, adjacent an earth formation of interest, are provided.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: April 30, 1985
    Assignee: Standard Oil Company (Indiana)
    Inventor: Theodore V. Lautzenhiser
  • Patent number: 4513619
    Abstract: Asymmetries of rotatable members such as aircraft propellers can be balanced out by the careful addition of counterweights at proper positions on the members. An accelerometer coupled to the mounting of an unbalanced rotating member produces a signal containing a component indicative of the unbalance. This signal would be useful for helping in the balancing process but it may also contain noise components from which the useful component has to be extracted without too much alteration. A fixed frequency band-pass filter could be used but the results then have to be manually corrected if the actual frequency varies from that associated with the filter or a manually turnable filter could be used but then of course the filter has to be tuned for each test.
    Type: Grant
    Filed: January 12, 1983
    Date of Patent: April 30, 1985
    Assignee: British Aerospace Public Limited Company
    Inventor: John A. Widdall
  • Patent number: 4512192
    Abstract: An apparatus for inertially determining the rate of angular rotation and translational motion of a structure is provided which utilizes a pair of vibrating accelerometers vibrating along a single axis with their force sensing axis located normal to the axis of vibration and rotated 90.degree. from each other. Signals from the vibrating accelerometers can be processed to provide indications of angular rotation about two axes and translation motion about two axes. Two of the sets of vibrating accelerometers can be combined to provide a three axis inertial reference system.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: April 23, 1985
    Assignee: Sundstrand Data Control, Inc.
    Inventor: Rex B. Peters
  • Patent number: 4512193
    Abstract: An accelerometer including a flexible pivot, a base to which one end of the flexible pivot is fixed, a pendulum fixed to the other end of the flexible pivot, a pair of torquers generating a torque in proportion to the acceleration applied through the base to the pendulum, and a displacement detecting device for electrically detecting a relative displacement of the pendulum to the base is disclosed, in which the above-mentioned base consists of first and second frames. The first frame is provided with a fixing part to which one end of the flexible pivot is fixed, a fixing portion to which the displacement detecting device is fixed, and an engaging portion to be engaged with an engaging portion provided on the second frame, whereby the assembly of the accelerometer can be made simplified and easy. The accelerometer of this invention is simple in construction and maintains its characteristics unchanged for a long period of time.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: April 23, 1985
    Assignee: Kabushiki Kaisha Tokyo Keiki
    Inventor: Michio Fukano
  • Patent number: 4510802
    Abstract: In an inertial system for sensing the angular rotation and translational motion of a structure utilizing a pair of accelerometers in a back-to-back arrangement vibrating substantially linearly along an axis normal to their force sensing axes, a mechanism utilizing a parallelogram structure is used to impart the vibratory motion to the accelerometers.
    Type: Grant
    Filed: September 2, 1983
    Date of Patent: April 16, 1985
    Assignee: Sundstrand Data Control, Inc.
    Inventor: Rex B. Peters
  • Patent number: 4510809
    Abstract: A first processing circuit receives signals from a vibratory acceleration and a speed of rotation and position sensor and comprises integration and filter means for providing a signal (sb) representative of the amplitude of any untrue running. A second processing circuit receives the output signal (sw) from the speed of rotation and position sensor and the signal (sb) and includes means for determining the phase difference between the signals (sw) and (sb). A memory (33) stores information representative, for different revolving systems and/or test conditions, of the difference between the measured phase difference and the angular position of an imbalance causing untrue running with reference to an origin on the revolving system. Appropriate information is read from the memory and combined with the measured phase difference in response to the actuation of selection means to provide an accurate output of the angular position of any imbalance causing untrue running.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: April 16, 1985
    Assignee: S.N.E.C.M.A.
    Inventor: Jean-Claude Fillion
  • Patent number: 4510808
    Abstract: An apparatus is provided for the continuous measurement of the bulk density of particulate material comprising an endless belt weighing conveyor having a compression zone and a weigh span downstream of the compression zone, means for feeding the material to said compression zone, a compression unit at said compression zone having a series of rollers an axes extending transverse to the direction of movement of the weighing conveyor, and transducer means provided at the weigh span for producing signals proportional to material weight. The rollers may be driven with a surface speed equal to the weighing conveyor belt speed and additional rollers may be mounted below the weighing conveyor to carry the load. The rollers are preferably embraced by a belt which gives a continuous surface and prevents tobacco getting between the rollers. In which case, the belt is driven with the same speed as the weighing conveyor belt, via a terminal roller and the other rollers follow.
    Type: Grant
    Filed: May 26, 1983
    Date of Patent: April 16, 1985
    Assignee: AMF Incorporated
    Inventor: Richard E. G. Neville
  • Patent number: 4509367
    Abstract: A device for indexing a rotor (17) of a machine (13) to be balanced utilizes the output signal (A) from a generator (15) connected to the machine rotor (17). The generator (15) produces a continuous sinusoidal output signal (A) proportional to the position and speed of the associated rotor (17). Detector means (37) detect a predetermined output from the generator (15) so that an indicator (41) issues an indication each time the detector means (37) detects the predetermined output. Thus, an operator can physically index the angular position of the rotor (17) with respect to the predetermined output (A) from the generator (15) when an indication is provided so that the position of the rotor (17) is referenced to the output signal (A) of the generator (15).
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: April 9, 1985
    Assignee: Lockheed Corporation
    Inventors: Joe A. McInturff, David W. Patterson
  • Patent number: 4509039
    Abstract: A shielded, closely spaced transmit-receiver system for use in an electronic article surveillance system is disclosed wherein at least one of the antennas is provided with at least two twisted loops lying in a common plane each loop being twisted 180.degree. to be in phase opposition with the adjacent loop and wherein both antennas are substantially enclosed by a conductive shield having a discontinuity in an outer portion enclosing each of the twisted loops.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: April 2, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Dean M. Dowdle
  • Patent number: 4507965
    Abstract: The present invention employs a mass which is movable toward or away from a detection device. The detection device generates electrical signals which because of their polarities and amplitudes act, when transmitted to an electrical coil, to provide torque and move the mass to an equilibrium position. The electrical signals also serve as a measure of forces on, or an indication of a position of, the device with which the present detector is used. The mass and the coil are mounted on shaft means which in turn is mounted in a pair of ball bearing assemblies. The ball bearing assemblies fit around the periphery of the shaft to provide substantial lateral restraint and further fit at the ends of the shaft to provide substantial vertical restraint. In addition the present invention provides a pair of heavy flux density producing magnets, which are separated by a gap within which the coil moves.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: April 2, 1985
    Assignee: Columbia Research Laboratories
    Inventors: Leo M. Stratton, Kenneth J. Sipple, Mario B. Tatonetti
  • Patent number: 4507964
    Abstract: A system for dynamically balancing a wheel utilizes low speed (preferably 50 to 100 rmp) rotation of the wheel that can if desired be provided manually. In manual operation as the rotation is imparted to the wheel by an operator, the rotational speed of the wheel is measured, and an indicator notifies the operator when sufficient rotational speed has been imparted to the wheel to enable a balancing operation to be carried out. Thereafter the wheel is allowed to coast and decelerate until the sensed forces have adequately settled out, then the forces of imbalance transmitted by the rotatable shaft are measured. When the measurements are obtained, any detected imbalance of the wheel is displayed on a suitable indicator mechanism.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: April 2, 1985
    Inventors: Willy Borner, Bernie F. Jackson
  • Patent number: 4506257
    Abstract: A simple and rugged alarm which is versatile in application includes a battery connected through first and second parallel switches to a light and buzzer alarm. The first switch comprises a first contact formed in a conductive plate and yieldably biased to an open position and a lever actuated cam for rotatably engaging and moving the first contact to a closed position. The second switch includes a second contact formed in the conductive plate which is yieldably biased to a closed position and a retractable pin for supporting the second contact in an open position.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: March 19, 1985
    Inventor: Joseph M. Roberts, Sr.
  • Patent number: 4505159
    Abstract: In the plating of wire, particularly gold plating of wire for terminal pins, obtaining a high quality fixed gold plate is a problem. The invention provides for testing the wire prior to plating to detect surface irregularities which affect the quality of the plate. A test length of wire has a length of tape wrapped spirally around, with at least an edge portion in contact with the wire. The wire, and tape, is then twisted, in the direction of the spiral of the tape, in a direction to tighten the tape. The tape is then unwound and the number of particles of wire material which have separated from the wire at defects adhere to the tape is counted. For premium grade wire, less than 6 defects per foot is a standard. Commercial grade wire, between 50 and 150 defects per foot is normal.
    Type: Grant
    Filed: March 11, 1983
    Date of Patent: March 19, 1985
    Assignee: Northern Telecom Limited
    Inventor: Stanley D. Entwistle
  • Patent number: 4502328
    Abstract: A dynamic electric wheel balancer for measuring the imbalance condition in a vehicle wheel and indicating the position and correction weights required for balancing the wheel in one or two planes. The wheel balancer contains a rotating shaft in order to make the dynamic measurements. The shaft is freewheeling during measurement and is brought up to a predetermined minimum r.p.m. value through a motor and clutch arrangement. In order to take the measurements, piezoelectric sensors are used to measure the vertical force components exhibited by the imbalance condition of the vehicle wheel secured to the rotating main shaft. The measured force components are converted into digital form. The balancer finds the definite integral of each of the forces generated by the piezoelectric transducers and uses the cross correlation data generated by these integrations to find the zero crossing points and the peak determinations.
    Type: Grant
    Filed: August 10, 1982
    Date of Patent: March 5, 1985
    Assignee: Hofmann Corporation Automotive Service Equipment
    Inventors: John F. Wood, Mark Van Dyke
  • Patent number: 4501137
    Abstract: A method for detecting knocking in internal combustion engine, wherein a plurality of constants K is stored corresponding to a plurality of ranges of engine speed. A reference value is calculated from a means value of an output signal of a knock sensor, from the constant K corresponding to an engine speed and from a predetermined offset value, through a calculation of multiplying the mean value by the constant K and adding the offset value to the result of the multiplication. Then an output signal, newly provided from the knock sensor after the calculation of the mean value, is compared with the reference value so as to decide that knocking occurs in the engine when the newly given output signal of the knock sensor exceeds the reference value. Therefore, the reference value can be suitably determined corresponding to the engine speed so that a detectable lower limit of knocking intensity is kept to be substantially constant.
    Type: Grant
    Filed: March 15, 1983
    Date of Patent: February 26, 1985
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keiji Aoki, Shinichiro Tanaka
  • Patent number: 4502044
    Abstract: This invention is directed to a system for detecting the presence of moisture in a given location such as the attic of a building or house before the moisture has had an opportunity to penetrate plaster walls or cause other damage. The disclosed invention includes a detector for detecting the presence of minute quantities of moisture contemporaneous with their initial appearance, which responds to the presence of moisture by exhibiting a decrease in its internal impedance. An audible signal-generating circuit is coupled to the detector and responds to the resultant decrease in the impedance of the detector by commencing to oscillate at a pre-determined audio frequency.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: February 26, 1985
    Inventors: James R. Farris, James R. Farris, Jr.
  • Patent number: 4499768
    Abstract: An apparatus for determining the imbalance in a rotating object has a drive means for rotating the object about an axis. Transducers measure the force of imbalance of the rotating object, with each transducer producing an electrical signal in response thereto. Electronic means receives the signals from the transducers and calculates the imbalance in the object. Drive means is directly coupled to the rotating object, such as a tire, with the drive means in the hub of the wheel on which the tire is mounted. Cantilever support means having a substantially planar surface provides support for the drive means onto the transducers in the frame of the apparatus.
    Type: Grant
    Filed: September 8, 1982
    Date of Patent: February 19, 1985
    Assignee: Coats Wheel Balancer Corp.
    Inventors: Allan C. Madden, Robert Cellucci, Robert A. Hoshida, Duncan MacKay
  • Patent number: 4500874
    Abstract: A fluid filter monitoring system includes a filter relief valve movable in response to a pressure buildup caused by filter clogging to sequentially actuate a pair of pressure-operated switches. A temperature sensor senses the temperature of fluid in the hydraulic system. A control unit, including a microprocessor, controls the energization of a plurality of indicators, depending upon the status of the temperature sensor, the pressure-operated switches and the duration of actuation of the switches.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: February 19, 1985
    Assignee: Deere & Company
    Inventors: Stephen F. Jacobi, Robert E. Haight, John W. Schletzbaum, Yolanda E. Martin, Stephen P. Lang