1
Nicolaas Hazewindus, Jacob Maria VAN Nieuwland: Wien filter. U S Philips Corporation, Frank R Trifari, George B Berka, April 26, 1977: US04019989 (44 worldwide citation)

A Wien filter for selecting particles having a given velocity from a beam of charged particles. Such a Wien filter comprises means to maintain an electric field and a magnetic field, which fields extend at right angles to each other and each at right angles to the axis of the particle beam. By provi ...


2
Jacques Lebailly: Polychromatic electroluminescent device. U S Philips Corporation, Frank R Trifari, George B Berka, March 2, 1976: US03942185 (32 worldwide citation)

A method of energizing an electroluminescent device including several in series connected elementary light sources at least two of which emit radiations of different wavelengths, comprising the steps of supplying the light sources with current pulses of different intensities and controlling the dura ...


3
Kjell Olow Ingemar Olsson, Bengt Georg Loggert: Transponder system. U S Philips Corporation, Frank R Trifari, George B Berka, April 19, 1977: US04019181 (30 worldwide citation)

A responder system in which incoming frequency f.sub.0 is converted to a harmonic frequency, e.g. 2f.sub.0, by means of a non-linear element, for example a diode, which is connected between capacitance and inductance in two parallel-connected series resonant circuits, one of which is closely tuned t ...


4
Walter Widmer: Prediction differential pulse code modulation system with adaptive compounding. U S Philips Corporation, Frank R Trifari, George B Berka, August 3, 1976: US03973199 (29 worldwide citation)

The adaptive differential PCM transmission system uses a first-order prediction and a simple quantizing step-wise adaptation to improve signal-to-quantizing noise ratio.


5
John Walter Chamberlayne: Transmission line pulse transformers. U S Philips Corporation, Frank R Trifari, George B Berka, March 15, 1977: US04012703 (29 worldwide citation)

A transmission line pulse transformer in which the characteristic impedance of a coiled transmission line is changed from a first value to a second (smaller) value at a first point intermediate its ends and back to the first value at a second point. The location of the points and the relationship be ...


6
Michael James Underhill: Phase and/or frequency comparators. U S Philips Corporation, Frank R Trifari, George B Berka, April 26, 1977: US04020422 (22 worldwide citation)

A phase comparator indicating a phase difference range of n .times. 360.degree., between two input signals, comprising edge triggered shift registers, for dividing the input signals by n, means for modulating the width of the resulting output pulses in proportion to the phase difference of the input ...


7
Harry Eggelsmann, Claus Peter Hodum: Rotary-anode X-ray tube. U S Philips Corporation, Frank R Trifari, George B Berka, May 17, 1977: US04024424 (19 worldwide citation)

A rotary anode X-ray tube wherein the anode carries the high voltage during operation; to achieve shorter acceleration times of the rotor, an insulator is provided between the rotor and the anode disc so that only a minimum air gap is required between the rotor and the stator.


8
Johannes Gerardus VAN Lent: Shadow mask having elongated apertures concave to vertical center line and increasing in pitch along x-axis with distance from said line. U S Philips Corporation, Frank R Trifari, George B Berka, March 30, 1976: US03947718 (17 worldwide citation)

The display screen of a colour cathode ray tube comprises a line pattern of elongated phosphor regions. The elongate apertures in the shadow mask having the shape of an approximately spherical sector are arranged along curved lines which during the manufacture of the tube are aligned in one flat pla ...


9
Michael James Underhill, Peter Anthony Jordan: Frequency synthesizer of the phase lock loop type. U S Philips Corporation, Frank R Trifari, George B Berka, May 17, 1977: US04024464 (16 worldwide citation)

A frequency synthesizer of the phase lock loop type including a reference frequency source, a voltage-controlled oscillator and a frequency divider connected to the oscillator output to divide the output frequency by a selectively-variable integer N. The outputs of the frequency divider and the refe ...


10
Willem Meijndert Van Alphen: Cathode-ray tube having electrostatic focusing and electrostatic deflection in one lens. U S Philips Corporation, Frank R Trifari, George B Berka, April 20, 1976: US03952227 (15 worldwide citation)

A cathode-ray tube having electrostatic focusing and electrostatic deflection lens which comprises three cylindrical electrode arranged along a common axis. The end electrodes are supplied by a high focusing voltage and the intermediate electrode is divided into at least three segments, each being s ...