General Electric Company

Mark E Duffy

James T Dakin

Raymond A Heindl

John M Davenport

Gary Robert Allen

Richard L Hansler

Curtis E Scott

Thomas G Parham

Frederic F Ahlgren

Michael M Secen

Tommie Berry, Jr

Sayed-Amr A El-Hamamsy

Rolf S Bergman

Timothy D Russell

Frederick W Dynys

Thomas M Golz

Gerald E Duffy

Lawrence T Mazza

Carl V Gunter

Victor A Levand, Jr

William Winder Beers

Charles D Greskovich

William J Cassarly

Bruce Richard Roberts

Victor D Roberts

George A Farrall

Harald L Witting

John P Cocoma

Frederick Hetzel

Lawrence W Speaker

Kenneth S King

Richard C Nagle

Avi Shertok

George Eric Coxon

Lazlo Balazs

David J Marks

Jeffrey Plaskon

A lighting system includes a plurality of fixtures, wherein each fixture includes a plurality of fluorescent lamps. A dimming ballast is operatively coupled to each fixture, each dimming ballast receives power from an outside source that is delivered to the fluorescent lamps within each corresponding fixture. A control module communicates with each dimming ballast, the control module receives a lighting level from an outside source, determines the most power efficient lighting solution and outputs a control signal to each dimming ballast related to the light output level of each lamp within each fixture.

Lighting control system with improved efficiency

A solid state light emitting-based illumination system which, when energized, exhibits a correlated color temperature (CCT) in the range of between about 3300&#xb0; K and about 5300&#xb0; K, and exhibits a COI of less than 3.3 is provided. The system comprises two or more solid state elements, and is configured to provide a total light that appears white when energized, the combined light having preselected spectral fraction values such that when combined the emission meets the specified CCT and COI standards. A method for combining individual solid-state light emitters is also provided.

Hospital lighting with solid state emitters

An electric lamp ( ) including a sealed light-transmissive lamp envelope ( ) having an interior space, a base fixed to the outer envelope ( ), a non-insulated main conductor wire ( ) within the outer envelope and connected to the base ( ) at one end, a light source ( ) capable of generating light within the outer envelope ( ), a shroud ( ) surrounding the light source ( ) and mounted adjacent the non-insulated main conductor wire ( ), and a first center support. The light source ( ) has first and second ends. The first end is electrically coupled to the non-insulated main conductor wire ( ), and the second end is coupled to a stem lead ( ). The first center support ( ) supports the shroud ( ) and the light source ( ) and mechanically couples the shroud ( ) and the light source ( ) to the non-insulated main conductor wire ( ).

Shrouded electric lamp having functionally distinguishable center supports

A method and apparatus for assembling a ceramic metal halide high intensity discharge (HID) lamp is disclosed. The apparatus includes a base adapted to receive a ceramic arc tube body, a movable gauge arm having a first portion contacting an end surface of the arc tube body, an electrode holder for supporting an electrode in contact with a second portion of the gauge arm, and a crimper for securing a stop to the electrode at a position determined by the extent of movement of the gauge arm. The apparatus permits stops to be secured to electrodes, either simultaneously or sequentially, thereby correcting for a length deviation of the arc tube body. As a result, half of the required correction is made on each electrode. Since both electrodes are set to the same insertion length, an arc gap is inherently centered in the arc tube body during assembly.

Crimp length gauge for ceramic metal halide electrodes

A high pressure discharge lamp utilizing an improved ceramic arctube. The arctube has a ceramic central portion, a first ceramic leg extending from one end of the central portion and in some embodiments a second ceramic leg extending from the other end of the central portion. The arctube has reinforcing means where one or both of the legs joins the central portion to reinforce and strengthen the connection between each leg and the central portion. The reinforcing means is preferably seal glass or a layer of seal glass adjacent a ceramic ring.

Arctube for high pressure discharge lamp

An interference filter or coating is provided in a predetermined pattern on a lamp envelope. The coating is comprised of alternating layers of high and low index of refraction materials applied to a vitreous outer surface of a lamp envelope. The coating may be geometrically symmetric or asymmetric, continuous or discontinuous with respect to the coating itself or the envelope to which it has been applied. The envelope can be masked prior to deposition of the coating so that removal of the mask leaves the filter in the desired pattern. The preferred process for forming the coating includes forming a boric oxide mask on a portion of the envelope, applying the coating over the mask and removing the coating from masked areas of the envelope by dissolving the mask in an aqueous solution.

Patterned optical interference coatings for electric lamps

A lamp-to-light guide coupling arrangement includes an electrodeless high intensity discharge lamp comprising an arc tube with an ionizable fill, and an excitation circuit for electrically exciting the ionizable fill to induce therein a light-producing arc discharge. The coupling arrangement further includes a coupling device comprising a generally tubular, hollow body that has an inlet end for receiving light from the arc discharge and a larger, outlet end. The coupling device further comprises an interiorly directed reflector on a surface of the hollow body for reflecting visible light. Such coupling device is shaped so as to receive light at one solid angle over an area of the inlet end and to transmit light at a smaller solid angle but over a larger area of the outlet end. The coupling device is preferably formed from dielectric material. The reflector preferably comprises a refractory optical interference filter.

Lamp-to-light guide coupling arrangement for an electrodeless high

Patterned optical interference coatings for only a portion of a high

A high intensity metal halide arc discharge lamp, such as an electrodeless lamp wherein RF energy is inductively coupled to the arc discharge, contains a halide of neodymium alone or in combination with other metals such as one or more rare earth metals, Na, Cs and is essentially mercury free (i.e., &lt;1 mg per cc of arc chamber volume).

Low mercury arc discharge lamp containing neodymium

A simulated load circuit for measuring the impedance of the arc discharge of an electrodeless discharge lamp of the type having an arc tube and an excitation coil for exciting the arc discharge in an ionizable fill contained therein includes: a secondary coil spaced apart from the excitation coil by a distance which is varied in order to vary the coupling coefficient between the secondary coil and the excitation coil; a fixed load resistance coupled to the secondary coil; and a variable matching network coupled in series or parallel with the load resistance, the impedance of the matching network being varied in order to vary the ratio of reactance to resistance of the load circuit. The distance between the secondary coil and the excitation coil is varied, and the impedance of the matching network is varied, until the input impedance of the load circuit is substantially equivalent to the operating impedance of the lamp. The simulated load circuit is useful for designing and testing ballast circuits for electrodeless discharge lamps and for providing measurements of arc discharge power and excitation coil efficiency.

Simulated load circuit for simulating the arc impedance of an

A base for an electrodeless arc discharge lamp having an elongated tubular stem extending through an outer envelope pinch or press seal includes a pair of electrically non-conductive members secured in mating relation to define an upper cavity and a lower axial bore. The lamp is mounted in the base with its pinch seal secured in the cavity and its stem extending into the bore. With the base mounted in a fixture, RF energy is coupled into the lamp to excite a starting aid in the stem via a conductive bushing in the bore.

Base for electrodeless discharge lamp

An electrodeless discharge lamp comprising an arc tube constructed of a light-transmissive material. An exciting structure surrounds the arc tube and is energizable with radio frequency current to develop an arc discharge. A reflective coating of non-conducting insulating material is disposed on the arc tube wall and is located to reflect light from the arc discharge through the arc tube. The reflective coating and the uncoated portion of the arc tube wall are surrounded by the exciting structure so that light from the arc discharge may reach the reflective coating without blockage by the exciting structure and, following reflection by the coating, travel through the uncoated portion of the arc tube wall.

Luminaire including an electrodeless discharge lamp as a light source

An electrodeless high intensity discharge (HID) lamp arc tube having a stabilized condensate location. The arc tube contains a predetermined location or distortion on the inside surface of the arc tube. The distortion may be a protrusion on the inside surface of the arc tube formed during the arc tube forming process. In operation of the lamp, the non gaseous dose remains condensed substantially in the cold spot region formed by said protrusion so that the arc tube walls remain clear for maximal light output, and the arc tube remains stable and efficacious to substantially higher power than is the case for arc tubes without the distortion.

Electrodeless arc tube with stabilized condensate location

A high intensity electrodeless metal halide arc discharge lamp wherein RF energy is coupled to the arc discharge, contains a halide of praseodymium alone or in combination with other metals such as one or more rare earth metals, Na and Cs and is essentially mercury free (i.e., &lt; 1 mg per cc of arc chamber volume).

Low mercury arc discharge lamp containing praseodymium

Method for measuring the impedance of an electrodeless arc discharge lamp

Growing community of inventors

Shaker Heights, OH, United States of America

Mark E Duffy