Mark E Duffy

US Patent:

6741013, May 25, 2004

Filed:

Dec 13, 2000

Appl. No.:

09/736060

Inventors:

James Thomas Dakin - Shaker Heights OH
Mark Elton Duffy - Shaker Heights OH
Curtis Edward Scott - Mentor OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01J 102

US Classification:

313 25, 313634

Abstract:

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 ( ).

US Patent:

8405324, Mar 26, 2013

Filed:

Jun 18, 2010

Appl. No.:

12/818460

Inventors:

William Winder Beers - Chesterland OH, US
Mark Elton Duffy - Shaker Heights OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H05B 37/00
F21V 9/00
H01J 61/94

US Classification:

315312, 362231

Abstract:

A solid state light emitting-based illumination system which, when energized, exhibits a correlated color temperature (CCT) in the range of between about 3300 K and about 5300 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.

US Patent:

8633653, Jan 21, 2014

Filed:

Mar 2, 2010

Appl. No.:

12/715688

Inventors:

Mark Duffy - Shaker Heights OH, US
Bruce Roberts - Mentor-on-the-Lake OH, US
Jeffrey Plaskon - Mentor OH, US
Lazlo Balazs - Budapest, HU
Istvan Maros - Budapest, HU
Avi Shertok - University Heights OH, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H05B 37/02

US Classification:

315291, 315294, 315312

Abstract:

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.

US Patent:

50952498, Mar 10, 1992

Filed:

Dec 4, 1990

Appl. No.:

7/622247

Inventors:

Victor D. Roberts - Burnt Hills NY
James T. Dakin - Shaker Heights OH
Mark E. Duffy - Shaker Heights OH
Raymond A. Heindl - Euclid OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

H05B 4116

US Classification:

315248

Abstract:

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 relative to that of the arc tube fill, is switched between conducting and nonconducting states corresponding to lamp-starting and normal running operation, respectively. To start the lamp, the starting voltage is applied to the starting electrode, causing a discharge current to flow in the gas chamber which, in turn, results in the capacitive coupling of a sufficiently high voltage to the arc tube in order to initiate an arc discharge therein. After the arc discharge is initiated, the starting voltage is substantially reduced so that the discharge current in the starting chamber is extinguished.

US Patent:

53630157, Nov 8, 1994

Filed:

Aug 10, 1992

Appl. No.:

7/927041

Inventors:

James T. Dakin - Shaker Heights OH
Tommie Berry - East Cleveland OH
Mark E. Duffy - Shaker Heights OH
Timothy D. Russell - Cleveland Heights OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01J 1720
H01J 6112

US Classification:

313638

Abstract:

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. , < 1 mg per cc of arc chamber volume).

US Patent:

53329708, Jul 26, 1994

Filed:

Jun 25, 1992

Appl. No.:

7/904287

Inventors:

Michael M. Secen - Mentor OH
Mark E. Duffy - Shaker Heights OH
Gerald E. Duffy - Mentor OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01R 3124

US Classification:

324414

Abstract:

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.

US Patent:

55876269, Dec 24, 1996

Filed:

Dec 27, 1995

Appl. No.:

8/579447

Inventors:

Thomas G. Parham - Gates Mills OH
Frederick W. Dynys - Chagrin Falls OH
Carl V. Gunter - Twinsburg OH
John M. Davenport - Lyndhurst OH
Thomas M. Golz - Willoughby Hills OH
Rolf S. Bergman - Cleveland Heights OH
Frederic F. Ahlgren - Euclid OH
Gary R. Allen - Chesterland OH
Mark E. Duffy - Shaker Heights OH
Richard L. Hansler - Pepper Pike OH

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01J 1716
H01J 6130
G02B 110
F21M 314

US Classification:

313634

Abstract:

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.

US Patent:

58669825, Feb 2, 1999

Filed:

Jan 29, 1996

Appl. No.:

8/593207

Inventors:

Curtis E. Scott - Mentor OH
Charles D. Greskovich - Schenectady NY
Mark E. Duffy - Shaker Heights OH
George Eric Coxon - Leicester, GB

Assignee:

General Electric Company - Schenectady NY

International Classification:

H01J 6130

US Classification:

313634

Abstract:

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.