1
Peter D Johnson, James T Dakin, John M Anderson: High efficacy electrodeless high intensity discharge lamp. General Electric Company, Marvin Snyder, James C Davis Jr, March 7, 1989: US04810938 (74 worldwide citation)

Improved efficacy and color rendition at white color temperatures is achieved in an electrodeless metal halide arc discharge lamp with a novel combination of arc tube fill materials, including sodium halide, cerium halide, and xenon. A preferred lamp structural configuration imparts further efficacy ...


2
John M Davenport, Mark E Duffy, Richard L Hansler, Kenneth S King, William J Cassarly, Thomas G Parham, Gary R Allen, James T Dakin, Frederic F Ahlgren: Lamp-to-light guide coupling arrangement for an electrodeless high intensity discharge lamp. General Electric Company, George E Hawranko, October 7, 1997: US05675677 (32 worldwide citation)

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 ...


3
James T Dakin: Electrodeless high pressure sodium iodide arc lamp. General Electric Company, Marvin Snyder, James C Davis Jr, November 8, 1988: US04783615 (30 worldwide citation)

High pressure xenon is used as a buffer gas in an electrodeless sodium iodide arc lamp. Very high efficacies are achieved by using an arc tube with rounded edges and by surrounding a portion of the arc tube with quartz wool. The arc tube may also contain small amounts of mercury iodide.


4
James T Dakin, Sayed A El Hamamsy: Electrodeless panel discharge lamp liquid crystal display. General Electric Company, Marvin Snyder, James C Davis Jr, October 10, 1989: US04872741 (19 worldwide citation)

A light transmissive liquid crystal display is illuminated from its rear surface by a juxtaposed flat electrodeless discharge lamp. The lamp includes a pair of glass plates sealably enclosing a fill gas. The front plate carries a phosphor coating on its interior surface and the rear plate carries a ...


5
James T Dakin, Tommie Berry Jr, Mark E Duffy, Timothy D Russell: Low mercury arc discharge lamp containing neodymium. General Electric Company, Stanley C Corwin, December 26, 1995: US05479072 (19 worldwide citation)

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., ...


6
Rolf S Bergman, James T Dakin, Thomas G Parham: Electric lamp with ellipsoidal shroud. General Electric Company, George E Hawranko, March 11, 1997: US05610469 (19 worldwide citation)

An electric lamp includes a sealed outer envelope, an arctube located within the envelope, a shroud separate from the arctube having an ellipsoidally-shaped reflecting portion positioned around the arctube, and a coating disposed on the reflecting section of the shroud for reflecting light having pr ...


7
Victor D Roberts, James T Dakin, Mark E Duffy, Raymond A Heindl: Gas probe starter for an electrodeless high intensity discharge lamp. General Electric Company, Jill M Breedlove, James C Davis Jr, Marvin Snyder, March 10, 1992: US05095249 (18 worldwide citation)

A gas probe starter for an electrodeless high intensity discharge (HID) lamp includes a fixed starting electrode for coupling a starting voltage to a chamber which is attached to the outer wall of the arc tube and contains a gas. The gas in the starting chamber, which is preferably at a low pressure ...


8
James T Dakin, Mark E Duffy: Acoustic resonance arc stabilization arrangement in a discharge lamp. General Electric Company, George E Hawranko, Stanley C Corwin, April 26, 1994: US05306987 (17 worldwide citation)

An arc stabilization arrangement for a discharge lamp having a light transmissive arc tube containing a fill of gas excitable to a discharge state upon introduction thereto of a drive signal having a predetermined frequency associated therewith, includes a modulating arrangement effective for provid ...


9
James T Dakin: Heat removing means to remove heat from electric discharge lamp. General Electric Company, George E Hawranko, Stanley C Corwin, Fred Jacob, July 7, 1992: US05128589 (17 worldwide citation)

Heat transfer means are disclosed to remove heat from a fused quartz arc tube being employed as the light source in an electric discharge lamp. The heat removal is carried out during lamp operation with a fused quartz protuberance that cooperates to remove heat being conducted through the arc tube w ...


10
James T Dakin, Mark E Duffy, Raymond A Heindl: Starting aid for an electrodeless high intensity discharge lamp. General Electric Company, George E Hawranko, Stanley C Corwin, Fred Jacob, August 18, 1992: US05140227 (16 worldwide citation)

This electrodeless high intensity discharge lamp comprises a light-transmissive arc tube having spaced wall portions of dielectric material and a first gaseous fill within the arc tube. An excitation coil about the arc tube is energizable with RF current effective to develop a toroidal arc discharge ...