Kathryn M Conway

US Patent:

61492833, Nov 21, 2000

Filed:

Sep 22, 1999

Appl. No.:

9/401137

Inventors:

Kathryn M. Conway - Nassau NY
Yutao Zhou - Richmond Heights OH

Assignee:

Rensselaer Polytechnic Institute (RPI) - Troy NY

International Classification:

F21V 100

US Classification:

362236

Abstract:

A lighting device has a support that can be screwed into a standard 120 volt light socket. A ring with multiple, alternating color, circumferentially spaced LEDs, is connected to the support and a reflector is provided over the ring for reflecting light from the LEDs past the ring. A power supply circuit is connected to the LEDs for powering the LEDs to emit light. The light can be white if the LEDs are a combination of red, blue and green or other white-forming combinations, or the power circuit can selectively power subsets of the LEDs to produce and desired color. The same circuit can be used to vary the intensity of the light in the manner of a dimmer.

US Patent:

52968154, Mar 22, 1994

Filed:

Jul 14, 1992

Appl. No.:

7/913653

Inventors:

Kathryn M. Conway - North Chatham NY
Peter Boyce - Ballston Lake NY
Kenneth Sasiadek - Nassau NY

Assignee:

Rensselaer Polytechnic Institute - Troy NY

International Classification:

G01R 2316
G01R 3100
G01R 1914
G01R 2702

US Classification:

324414

Abstract:

A portable inspection device is disclosed enabling a user to identify what type ballast means are being employed to operate gaseous discharge lamps. Magnetic ballasts are distinguished from electronic ballasts in such manner by simply inspecting the lamp illumination from a remote location.