Abstract: A contact-breaking ignition plug comprises a magnet coil arranged in a housing and surrounding a magnet core. The magnet core comprises an enlarged end portion with lateral surfaces extending conically in relation thereto and also comprises a cavity in which an armature is movably arranged. The armature is mounted on a rod in asymmetrical relation to a longitudinal center plane of the cavity and in transverse relation to the direction of compression pressure propagation. These features induce a concentration of the magnetic effect in the armature region and cause the contact-breaking motion to be augmented by the compression pressure. Respective contact electrodes are exchangeably mounted at each of the free end of the armature and a nose of the housing.
Abstract: A front emission type fluorescent display device is disclosed which is capable of exhibiting an antireflection effect sufficient to ensure excellent visibility of the display section even under high illuminance and being manufactured with ease. The device includes an antireflection film arranged between a glass substrate and anode conductors. The antireflection film comprises a dielectric layer and an absorption metal layer selected so as to provide a combination in refractive index therebetween which is sufficient to minimize a reflectance at an interface between both layers.
Abstract: A high-pressure discharge lamp operating circuit performs a low-frequency AC operating at an early stage of operating and thereafter performs a high-frequency AC operation or DC operation during the steady-state of lamp operation. This circuit comprises a circuit for effecting a transition from the low-frequency AC operation to the high-frequency AC operation or DC operation either at the time which is a predetermined time period after the ignition of discharge before the high-pressure discharge lamp reaches the steady-state of operation, or after having detected at least one of predetermined lamp characteristics, thereby providing a stabilized light output.
Abstract: An ion source is described, including a source of neutral particles which arrive at an ionization support positioned inside a chamber which is closed by a cap and which includes lateral walls. The cap includes an outlet orifice opposite which a plate defines a main ionization active surface. An electric field is applied between said device and by an electrode place downstream from the orifice in the direction of ion emission and fitted with a corresponding opening. Overall, the ionization support defines, by virtue of its active surface, and by virtue of holes surrounding said central active surface, a baffle assembly which prevents neutral atoms from passing directly to the outlet orifice, and which contributes to a high degree of ionization.
November 6, 1987
Date of Patent:
January 31, 1989
Office National D Etudes et de Recherches, Aerospatiales and Universite de Paris-Sud
Georges Slodzian, Bernard Daigne, Francois Girard
Abstract: The electric incandescent lamp has a multi-use lamp vessel having a neck-shaped wall portion, a wall portion which is curved in accordance with a first circuit arc and extends substantially in the transverse direction, and a wall portion which is curved in accordance with a second circular arc and extends substantially in the axial direction. A filament is arranged in the proximity of the largest diameter. The electric incandescent lamp has the advantage that, independent of its finish it has a lamp vessel of the same shape and the same mounting means for the filament. The manufacture of incandescent lamps of different types is thereby simplified considerably.
Abstract: An electronic adornment for clothing, jewelry and the like includes an electrically operated light emitter and an electrical circuit operative to intermittently actuate the light emitter to closely simulate natural flickering light from faceted gemstones. The electrical circuit includes independent controls for pulse frequency and pulse width.
Abstract: This invention utilizes the property of diodes to judge positive/negative voltage, and connecting general incandescent lamps in parallel to combine, as lamp-strings, with each being polarized. The lamp-string is assembled with flicker-control device, a power supply using AC source which offers direct current with positive and negative variation to provide an assembly of a flicker-control device and lamp-strings for advertisement, decoration and other applications and a flickering function.
Abstract: A thin film EL display device having an EL light emitting layer sandwiched between a transparent electrode and an opposing electrode, wherein a light absorbing black layer containing constituent ingredients for the EL emission layer is disposed at the back of the EL emission layer. The external incident light is not reflected but absorbed well into the light absorbing layer to enable an improvement in the display contrast.
Abstract: An improvement in dual beam mode fluorescent lamps in which a capacitive ballast is provided integral with the lamp structure in the form of a cylindrical laminate of metal and insulator coaxial to the lamp's major axis.
Abstract: A matching circuit arrangement for operating a high-pressure discharge lamp. The circuit arrangement is provided with first and second input terminals for connection to a supply source, each of which is connected to a respective first and second output terminal. The output terminals are intended for connection of the high-pressure discharge lamp. A first controlled semiconductor switching element A having a thyristor characteristic is included in a connection between the second input terminal and the respective second output terminal. A control electrode of the switching element A is connected to a main electrode BE2 of a second controlled semiconductor switching element B having a thyristor characteristics. The main electrode AE2 of the first switching element is connected together with the main electrode BE1 of the second switching element to the second input terminal. The main electrode AE1 of the first switching element is connected to the second output terminal.
Abstract: The anode means of a Hall accelerator with a main discharge area has coaxial cylindrical electrodes aligned with the longitudinal axis of the main discharge area and an auxiliary electromagnet surrounding the electrodes, and an electric field is applied across the cylindrical electrodes while the auxiliary electromagnet produces an axial magnetic field therebetween so that a preionization discharge area is formed in communication with the main discharge area.
Abstract: The capped electric lamp according to the invention has a lamp cap (9) of synthetic material comprising a dish-shaped part (10) having a circular-cylindrical wall portion (11) with an axis (12) and a bottom (13), and further comprising a panel (16) in which contact members (20) are anchored and a sleeve-shaped part (17) which surrounds these contact members. There is fixed in the dish-shaped part (10) a metal sleeve (7) which is telescopically joined at one end (8) with a flanged edge (6) of a metal clamping plate (5) and is connected thereto, while a seal (2) of a lamp vessel (1) is fixed in an opening of this clamping plate.
April 12, 1985
Date of Patent:
August 18, 1987
U.S. Philips Corporation
Rudolf Sanders, Godefridus G. van Seggelen
Abstract: A field emission cathode 12 is positioned in a pair of intersecting cross grooves 30, 32 in the end of a ceramic tube 14 by a metal end cap 24. A spring 34 in electrical contact with the base of the cathode provides the necessary pressure to maintain continuous circumferential electrical contact between the gate film and a raised edge 38 on the end cap. With this structure the cathode chip is self-centering and easily replaceable. Also the gate film of the cathode is not abraded or rubbed during installation, and the holder is readily degassed.
May 9, 1985
Date of Patent:
August 18, 1987
The United States of America as represented by the Administrator National Aeronautics & Space Administration
Abstract: In a magnetron cathode assembly having a filament for emitting thermoelectrons, upper and lower end shields fixed at upper and lower ends of the filament, a center lead fixed at and connected to the upper end shield, a side lead fixed at and connected to the lower end shield, and an insulating spacer having through holes with which the center and side leads are respectively engaged, the insulating spacer comprises a groove which has a width substantially the same as a diameter of one of the through holes and which clamps a bent portion of at least one of the center and side leads.
Abstract: An improved adaptor for using fluorescent lighting in fixtures designed for incandescent lamps which comprises a housing having a centrally located lined cavity which depends through the housing and which is adapted to receive the starter element, a mounting means or plug which depends from the lower surface of the housing, and ballast disposed within the interior of the housing adjacent to or about the lined cavity which depends through the central portion of the housing.
Abstract: A circuit for the efficient generation of high voltage pulses for the initiation of conduction in gaseous discharge lamps, the effective suppression of potentially harmful voltage surges resulting from derangement of one or more electrical, current-carrying mechanical, or mechanical components within the overall gaseous discharge lighting apparatus, and reduction of radio frequency interference resulting from the normal and deranged operation of the overall gaseous discharge lighting apparatus. The ignitor/suppressor includes a semiconductor switching device, a capacitor of special characteristics, a transformer of special construction, and a resistor for the generation of high voltage pulses. The ignitor/suppressor also includes a semiconductor switching device, a capacitor of special characteristics, and a resistor for the effective suppression of abnormally high voltages.
Abstract: Apparatus and method for automatic control of with a high pressure mercury arc lamp is described. The apparatus includes a control unit that monitors the current and the voltage supplied to the arc lamp. A temperature measuring device is coupled to a portion of the lamp for monitoring the temperature. The control device controls a flow of air past the lamp by controlling the power to a fan motor or by controlling the flow of air by controllable dampers. After equilibrium conditions are established, the control unit determines and stores the equilibrium values of current and voltage. Thereafter the control unit monitors the values of current and voltage periodically. When these measured voltage and current values are outside of predetermined limits, the control unit initiates shut down operation of the lamp.
Abstract: A three (3)-way lamp having a tungsten halogen-cycle inner envelope and an operating circuit for the inner envelope is disclosed. The operating circuit comprises a ballast element and two diodes lodged within the confines of the base of the lamp. The operating circuit allows the inner envelope to provide three different levels of illumination for the lamp while still maintaining the desired operation of the halogen additive within the inner envelope.
Abstract: A spherical RF source tube which requires no magnetic fields for its operation which consists of two concentric spherical shells. The inner shell, which is open and which is nearly transparent to electrons, is charged positively with respect to the grounded outer shell, which is solid. The outer shell contains ports for the vacuum system, for the high voltage bushing that supports the inner shell, for the output coupling devices, and for plasma devices used in starting and maintaining operation.
December 20, 1984
Date of Patent:
January 27, 1987
The United States of America as represented by the Secretary of the Army