Lucidity Lights, Inc.

Osram Sylvania Inc.

Gte Products Corporation

Gte Sylvania Incorporated

David Alan Goodman

Walter Peter Lapatovich

John R Goscha

David Wentzel

George C Wei

Arlene Hecker

Victor D Roberts

George L Duggan

John A Scholz

Elliot F Wyner

Felix I Alexandrov

James N Lester

Philip J White

Nanu Brates

Richard A Parrott

John L Plumb

Richard A Snellgrove

Thomas Farkas

Rudy E Geens

Zeng Zhi Yu

An induction RF fluorescent lamp having a bulbous vitreous portion of the induction RF fluorescent light bulb including a lamp envelope filled with a working gas mixture. The lamp includes a power coupler and an electronic ballast. A first metallic structure is attached to a cavity wall and extends outwardly radially therefrom and within the lamp envelope outside a re-entrant cavity including mercury. The first metallic structure is mounted within the lamp envelope and adapted to absorb power from the electric field and induce discharge during a turn-on phase of the induction RF fluorescent lamp in a manner sufficient to rapidly heat and vaporize the mercury and promote rapid luminous development during the turn-on phase of the induction RF fluorescent lamp.

Fast start RF induction lamp with metallic structure

An induction RF fluorescent lamp, comprising a vitreous envelope filled with a working gas mixture, a power coupler comprising at least one winding of an electrical conductor for receiving an alternating voltage and current to generate an alternating magnetic field and thereby induce an alternating electric field within the lamp envelope, an electronic ballast providing appropriate voltage and current to the power coupler and a main mercury amalgam having a vapor pressure at room temperature which is higher than the vapor pressure of the mercury amalgam formed on the flag.

Fast start RF induction lamp

A fast starting induction RF fluorescent lamp capable of changing illumination level through a burst-mode dimming facility, comprising a dimming facility enabling the induction RF fluorescent lamp to dim in response to a control signal, and with structures within the bulb envelope that facilitate rapid luminous development during a turn-on phase.

Fast start induction RF fluorescent lamp with burst-mode dimming

A fast starting induction RF fluorescent lamp that is able to replace an ordinary incandescent light bulb, both in its ability to screw into a standard incandescent light bulb socket and to have the general look of the ordinary incandescent light bulb, but with all of the advantages of an induction lamp, as described herein. The present disclosure describes structures for an induction RF fluorescent lamp that includes a bulbous portion, an electronics portion, and a screw base, creating an external look that is similar to the profile of an ordinary incandescent light bulb, and with structures within the bulbous portion that facilitate rapid luminous development during the turn-on phase of the induction fluorescent lamp.

Fast start induction RF fluorescent light bulb

A fast starting induction RF fluorescent lamp comprising a power coupler with conductive material in contact with the power coupler to reduce extraneous electromagnetic radiation emanating from the power coupler, and with structures within the bulb envelope that facilitate rapid luminous development during a turn-on phase.

Fast start induction RF fluorescent lamp with reduced electromagnetic interference

A fast starting dimmable induction RF fluorescent lamp comprising a dimming facility enabling the induction RF fluorescent lamp to dim in response to a signal from an external dimming device, and with structures within the bulb envelope that facilitate rapid luminous development during a turn-on phase.

Fast start dimmable induction RF fluorescent light bulb

An optically translucent polycrystalline alumina sintered body consists essentially of alumina, magnesia, terbia and, optionally, yttria. The magnesia is present in an amount of about 0.020 wgt. percent and the terbia is present in an amount of from about 0.005 to 0.060 wgt. percent. The yttria is present in an amount up to about 0.035 wgt. percent.

Translucent polycrystalline alumina and method of making same

A metal halide discharge lamp includes an outer evacuated sealed glass envelope having a domed end and a socket end spaced from the domed end along a longitudinal axis. The socket end is subject to high temperature sealing fires during the lamp manufacturing process. A getter material is contained in the envelope for removing gaseous materials therefrom, the getter material being positioned in the envelope in an area of the lamp remote from the socket end. A pair of electrical conductors extend into the interior of the glass envelope and an arc tube containing an arc sustaining chemical fill and including a pair of spaced electrodes is electrically connected to the electrical conductors for creating an electric arc during operation of the lamp. The getter material comprises about 70 weight percent zirconium, about 24.6 weight percent vanadium, and about 5.4 weight percent iron. The activation temperature of the getter is in the range of 400.degree.-500.degree. C.

Metal halide lamp with getter

An optically transparent polycrystalline alumina sintered body consists essentially of alumina, magnesia, yttria and zirconia. The magnesia is present in an amount of about 0.020 wgt. percent, the yttria is present in an amount of about 0.035 wgt. percent, and the zirconia is present in an amount of about 0.018 wgt. percent. An arc tube for a high pressure sodium lamp made from this composition has greatly increased resistance to sodium loss and concomitant outer jacket darkening, whereby the effective amount of lumen output is increased.

An electron emitting, barium hafnate material for arc discharge lamp electrodes is manufactured by the method comprising the steps of: forming a mixture of barium carbonate and hafnium oxide in a 48 to 52 mole ratio; adding the mixture to a suitable carrier to form a slurry; ball milling the slurry for about 2 hours to form a powder mix; drying the powder mix; firing the dried powder mix in air at about 1500.degree. C. for about 22 hours to produce a product; and vibration milling the product in methanol with zirconia media to produce the barium hafnate. The latter material is then preferably vacuum impregnated into a tungsten electrode and hydrogen fired to produce a single phase barium oxide/hafnium oxide compound.

High pressure arc discharge lamp having barium hafnate impregnated

In a mercury vapor arc discharge tube having a pair of electrodes, an emissive material disposed on the electrodes consists essentially of a single phase compound of Ba.sub.x Sr.sub.1-x Y.sub.2 O.sub.4 where x is from about 0.25 to about 0.95.

Mercury vapor discharge device

An emissive material for use in a vapor discharge device including reacted Ba.sub.x Sr.sub.1-x Y.sub.2 O.sub.4 wherein X satisfies the following: 1&gt;X.gtoreq.0. A vapor discharge device is provided having an arc tube which includes electrodes therein coated with such emissive material.

Vapor discharge device with electron emissive material

A high pressure sodium vapor discharge device including a polycrystalline alumina arc tube which contains a fill including sodium and mercury is disclosed. An electrode is disposed at each end of the arc tube, and an emissive material including an oxygen getter, such as, zirconium and/or niobium, and thorium dioxide is coated on at least one of the electrodes. The improved emissive material coating reduces the rate of sodium loss from the arc tube and inhibits loss of luminosity due to discoloration of the arc tube.

Growing community of inventors

Amesbury, MA, United States of America

David Alan Goodman