Patents Represented by Attorney J. S. Christopher
  • Patent number: 4664674
    Abstract: A method of making priming devices for a fuel element is disclosed. A high quality priming device is obtained by treating suitable pieces of cellulose with catalyzing agents such as manganates or permanganates and with oxidizing agents such as inorganic oxidizing salts. Such priming devices are very reliable and may be used in portable personnel heaters, e.g. to keep injured people warm after accidents.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: May 12, 1987
    Assignee: Forsvarets Forskningsinstitutt
    Inventors: Tor A. Oftedal, Thomas Ramdahl
  • Patent number: 4655091
    Abstract: A transducer responsive to rotational movement comprises a support member on which a shaft is rotatably mounted. Relative movement between the member and the shaft is sensed by flexure of a strip of a piezo-resistive mateial. Typically, the strip is facribed from signle crystal silicon.
    Type: Grant
    Filed: March 28, 1984
    Date of Patent: April 7, 1987
    Assignee: International Standard Electric Corporation
    Inventor: John C. Greenwood
  • Patent number: 4654567
    Abstract: The blocking protection arrangement includes a first transistor whose emitter-collector path lies in the base voltage supply of second and third switching transistors performing commutation. The first transistor receives its base voltage from a self-induction voltage of a stator winding. In the event of a blocking of a motor, this voltage is missing, so that the first transistor is rendered nonconductive.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: March 31, 1987
    Assignee: Standard Elektrik Lorenz Aktiengesellschaft
    Inventor: Franz Bracha
  • Patent number: 4653086
    Abstract: A communication terminal for processing voice and graphical information having a telephone set including a handset supported by a housing with an input device mounted within the housing for establishing communication with a distant terminal. The input device includes a flat display screen having a presentation portion and a switching field portion. A transparent resistive coating which conducts electrical signals and which is mounted over the presentation portion is manually contacted by a pen which extracts a signal for identifying the point of contact. The pen is used to touch the portion of the screen representing a dial keypad and various switching functions. The extracted signals are digitized and transmitted to distant terminals via a control circuit which processes both voice and graphical information.
    Type: Grant
    Filed: March 15, 1985
    Date of Patent: March 24, 1987
    Assignee: International Standard Electric Corporation
    Inventor: Manfred Laube
  • Patent number: 4652883
    Abstract: A radar phase shifter is described, of the type which includes several phase shift devices whose phase shift angles can be added together, which produces a minimal VSWR and an accurately controllable total phase shift. A five bit phase shifter includes devices that phase shift by angles that are nominally 11.25.degree., 22.5.degree., 45.degree., 90.degree., and 180.degree.. The 45.degree. device is located between the 90.degree. and 180.degree. devices to minimize the VSWR. In addition to the preset phase shift devices, an analog phase shifter device is provided which compensates for the inaccuracy of the other devices.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: March 24, 1987
    Assignee: ITT Corporation
    Inventor: Constantine Andricos
  • Patent number: 4645345
    Abstract: A rotation rate measuring instrument for measuring the rotation rate of a fiber gyro having a light source, a series of beam splitters, a phase modulator, a coiled optical waveguide and an evaluating circuit provides a first and second light beam which traverse the coiled optical waveguide in opposite directions. At least one of the light beams is modulated at an angular frequency .omega.m in the phase modulator while at least one of the light beams is further modulated at a second frequency .omega.s. The frequencies are distinguishable in the evaluating circuit permitting the suppression of signal components caused by light reflected at the boundaries of the phase modulator.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: February 24, 1987
    Assignee: Standard Elektrik Lorenz Aktiengesellschaft
    Inventor: Gunter Domann
  • Patent number: 4638273
    Abstract: A waveguide joint with flanges bonded to a waveguide section. Each flange is divided into two pieces with internal knurling and corner projections to bite into the external waveguide corners. The flange pieces are pressed on while the bonding adhesive is cured.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: January 20, 1987
    Assignee: ITT Corporation
    Inventors: John D. Foglesonger, David M. Vranson
  • Patent number: 4633109
    Abstract: An electronically commutated, collectorless direct current motor having a permanent magnet rotor comprised of a cup-shaped hollow cylinder in whose interior an internal magnetic yoke is arranged, an internal stator core and an external stator core. A stator drum winding comprises a plurality of phase windings wound on an insulating body with a portion of the stator winding being commingled with the phase windings in a plurality of slots of a slotted stator. The insulating body has a novel shape for arranging the stator winding thereon and for inserting the insulating body into a plurality of slots of the external stator core.
    Type: Grant
    Filed: October 23, 1985
    Date of Patent: December 30, 1986
    Assignee: Standard Elektrik Lorenz Aktiengesellschaft
    Inventor: Josef Feigel
  • Patent number: 4627728
    Abstract: A sensor responsive to magnetic field strength employs a feedback control loop operating on a piezoelectric stretcher element (13) to maintain a predetermined phase relationship between the optical path lengths of first and second Fabry Perot optical fiber/waveguide interferometer cavities (4, 11) optically in series. The control signal for the loop is derived from monitoring the transmission of the series combination and compensates for changes in optical path length in one of the cavities, the sensor cavity (4), induced by a magnetostrictive stretcher (7). The arrangement is responsive not only to the magnetic field but also to spurious effects resulting from temperature changes and so a reference cavity (5) thermally strapped to the sensor cavity is employed in a similar configuration to provided a second signal for correction purposes.
    Type: Grant
    Filed: February 27, 1984
    Date of Patent: December 9, 1986
    Assignee: International Standard Electric Corporation
    Inventor: Jolyon P. Willson
  • Patent number: 4628273
    Abstract: An optical amplifier having, for example, a photocathode to convert light to electrons, an electron multiplier, and a photo-emitter or light emitting diode to convert electrons to light. The electron multiplier may be made of magnesium oxide, silicon dioxide or silicon dioxide having bubbles therein. Alternatively, the electron multiplier may be an avalanche diode or other diode.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: December 9, 1986
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Weldon R. H. Vlasak
  • Patent number: 4627687
    Abstract: A positioning device comprising a bolt having a transducer and an optical waveguide fixed inside a guide sleeve mounted concentric with the longitudinal axis of the bolt. Supporting members on the bolt for the transducer and the guide sleeve are arranged in a spaced relation. The supporting member for the guide sleeve comprises a semi-cylindrical shell provided with an extended supporting arm on which the sleeve is mounted. A plate-shaped supporting member for the transducer is mounted in the shell. To achieve an improved separation of the heat-flow paths, slots are cut on opposite sides of the supporting arm into the shell.
    Type: Grant
    Filed: February 27, 1984
    Date of Patent: December 9, 1986
    Assignee: International Standard Electric Corporation
    Inventors: Reimund Dorn, Heinz Ebner, Johann Gundert, Ernst Halder, Werner Haspel, Ingo Isert, Gunter Kuhnemann, Felix Lutz, Gerhard Seibold, Gerhard Wessel
  • Patent number: 4626193
    Abstract: A direct spark ignition system is provided with an improved spark generator powered directly from a low voltage dc source through an inverter controlled by a gated oscillator. The inverter is comprised of a step-up transformer having its primary winding connected between the power source and a common-emitter transistor having its base electrode connected to an output of the oscillator. A rectifier couples the secondary winding to a storage capacitor, and a spark discharge timing means controls periodic discharge of the storage capacitor into a spark electrode. A diode between the collector of the switching transistor and the storage capacitor is poled to couple back EMF of the transformer primary winding into the capacitor, thereby not only protecting the collector of the transistor but adding the back EMF energy to the charge in the capacitor for higher efficiency. High spark rates (nominal 750 sparks per minute) are achieved.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: December 2, 1986
    Assignee: ITT Corporation
    Inventor: Ronald A. Gann
  • Patent number: 4625108
    Abstract: In a sensor head (1), hemispherical in form, a plurality of optical fibers (4) is uniformly distributed over the convexly arched surface area (3), and mounted therein. The other ends of the optical fibers (4) are gathered into a bundle (6) whose end face opposes a detector matrix (8) comprising a plurality of detectors. By a subsequently arranged evaluating circuit, and by assigning the detectors to the individual optical fibers (4), there is determined the direction and, by summing up the individual charges of the detectors, there is also recognized the intensity of the incident radiation.Some additional bundles (15) of optical fibers (16) are disposed by being distributed among the optical fibers (4). From each such bundle (15), an equal number of optical fibers (16) is led to each of several detectors (17). These detectors (17) are provided with individual filters (18, 19, 20) or a common filter (23) having certain wavelength responsive regions.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: November 25, 1986
    Assignee: International Standard Electric Corporation
    Inventors: Siegfried Nestel, Manfred Bohm
  • Patent number: 4620091
    Abstract: The invention relates to a mounting support (1) for phototransmitters (10) and photoreceivers (11) to be arranged in the way of forked light barriers, between which the rim portion of a signal disk (28) is capable of being moved. On the mounting support (1) there are provided insertion openings (8, 9) for inserting the phototransmitters (10) and the photoreceivers (11). These are provided with a locking element with which the inserted phototransmitter (10) or the inserted photoreceiver (11) can be locked and thus definitely fixed in their positions. No other adjustments are required.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: October 28, 1986
    Assignee: International Standard Electric Corporation
    Inventor: Manfred W. Zebisch
  • Patent number: 4620193
    Abstract: In an optically controlled phased array radar control information in the form of microwave frequency modulation of an optical carrier is transmitted by optical waveguide from a central processor to each of the antenna elements. Phase shifts introduced by each of the individual waveguides are then monitored to provide a compensation signal used either to regulate the phase shift or to offset the phase of the modulation applied to the waveguide at the central processor end.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: October 28, 1986
    Assignee: International Standard Electric Corporation
    Inventor: John S. Heeks
  • Patent number: 4613865
    Abstract: A system for determining the direction of propagation of and the radio frequency of a source of electromagnetic energy. A frequency scanning compressive receiver detects the frequency of a radiating source at a high scanning rate. Resolution is thus not as good as desired. In this arrangement, a resolution receiver is combined to obtain sources of radiated energy of different frequencies that the compressive receiver cannot distinguish.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: September 23, 1986
    Assignee: ITT Corporation
    Inventor: Leonard J. Hoffman
  • Patent number: 4613839
    Abstract: Machined planar array serpentines and transmission lines. The waveguide is fabricated in two parts. In cross section, one part is U-shaped having two side walls and a bottom wall machined out of one piece of aluminum. A plate rests upon and is arc welded to the upper edges of the side walls to provide a fourth wall.
    Type: Grant
    Filed: August 9, 1984
    Date of Patent: September 23, 1986
    Assignee: ITT Corporation
    Inventors: John D. Foglesonger, Robert A. Masters
  • Patent number: 4606614
    Abstract: An acousto-optic isolator for a semiconductor laser diode comprises a Fabry-Perot resonator tuned to the laser optical frequency f.sub.o followed by an acousto-optic Bragg diffraction device utilizing surface acoustic waves of frequency f.sub.a launched from a transducer. Light focussed by a lens to the load has a resultant frequency f.sub.o +f.sub.a. Any light reflected from the load suffers a further change in frequency to f.sub.o +2f.sub.a in the diffraction device and hence is blocked by the resonator. Undiffracted light can be detected at a photo-detector and used in a feedback control loop to stabilize the light source to the resonator.
    Type: Grant
    Filed: November 2, 1982
    Date of Patent: August 19, 1986
    Assignee: International Standard Electric Corporation
    Inventors: John S. Heeks, John D. Jackson
  • Patent number: 4599593
    Abstract: A tilting-armature relay having an excitation coil and magnetic core mounted within a housing and supported by a magnet yoke. A tilted armature mounted above the core pivots about a knife-edge bearing and responds to an electromagnetic field. A supporting spring is clamped to the magnet yoke for providing a spring force against the armature and a leaf spring carrying a first of a set of electrical contacts is mounted atop and operates with the armature. The leaf spring is fixedly connected to the supporting spring forming an overlapping connecting piece for connecting the supporting spring to the armature. The supporting spring exerts a pulling force on the leaf spring for providing a restoring force to the armature forcing together the set of electrical contacts and exactly defining a contact pressure therebetween independent of the spring characteristic of the supporting spring.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: July 8, 1986
    Assignee: International Standard Electric Corporation
    Inventor: Werner Minks
  • Patent number: 4598252
    Abstract: A power amplifier having plural parallel amplification circuits of different gains selectively actuable to zero and maximum gains, and electronic switches to select a circuit for connection to a common output junction.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: July 1, 1986
    Assignee: ITT Corporation
    Inventor: Constantine Andricos