Benjamin M Alexandrovich

US Patent:

7119486, Oct 10, 2006

Filed:

Jul 1, 2004

Appl. No.:

10/883077

Inventors:

Valery A. Godyak - Brookline MA, US
Benjamin M. Alexandrovich - Brookline MA, US
Alexander A. Sapozhnikov - Framingham MA, US
Kenneth R. Hutcherson - Stafford VA, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01J 1/62

US Classification:

313490, 313488

Abstract:

An electrodeless fluorescent lamp () having a burner (), a ballast housing () containing a ballast () and a screw base () for connection to a power supply. A reentrant cavity () is formed in the burner () and an amalgam receptacle () containing amalgam () is formed as a part of the reentrant portion and in communication with the burner (). A housing cap (), formed of a suitable plastic, connects the burner () to the ballast housing () and a suitable adhesive () fixes the burner to the housing cap (). An EMI cup () is formed as an insert to fit into the ballast housing (), which also is formed of a suitable plastic, and has a bottom portion () and an EMI cap () with an aperture () therein closing an upper portion (). The EMI cup () and the EMI cap () are preferably formed from 0. 5 mm brass.

US Patent:

7180230, Feb 20, 2007

Filed:

Jun 18, 2004

Appl. No.:

10/872058

Inventors:

Valery A. Godyak - Brookline MA, US
Benjamin M. Alexandrovich - Brookline MA, US
Alexander A. Sapozhnikov - Framingham MA, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01J 29/76

US Classification:

313153, 313154, 313155, 313156, 313160, 315248, 315344

Abstract:

An electrodeless fluorescent lamp has an envelope that includes a chamber. A core of magnetic material, preferably ferrite, is positioned in the chamber and has a first winding surrounding the core and having first and second lead-in wires , attached to a high frequency voltage supply or ballast. A second winding surrounds the core , respective turns of the second winding being located adjacent turns of the first winding and electrically insulated therefrom. The second winding has a free end and has another end connected to one of the lead-in wires, for example. A braided sheath surrounds the other of the lead-in wires. The first winding is generally called the RF antenna. The braided sheath is connected to the local ground. This inexpensive solution alone reduces the conductive EMI level sufficiently to pass all existing regulations on such interference with significant reserve.

US Patent:

8258710, Sep 4, 2012

Filed:

Sep 2, 2010

Appl. No.:

12/874292

Inventors:

Benjamin Alexandrovich - Brookline MA, US
David Betts - Peabody MA, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H05B 37/00

US Classification:

315207, 315200 R, 315119, 315123, 315125

Abstract:

Solid state light source driving and dimming systems are provided that enable a plurality of solid state light source (e. g. , LED) driver circuits to be coupled to a single AC voltage source. The driver circuits may include constant current circuitry configured to generate a constant AC current from the AC voltage source, and rectifier circuitry configured to generate a DC current to drive the solid state light source (e. g. , LEDs). Dimming control includes shunt circuitry operable with a PWM switch to shunt the AC voltage source during certain portions of a PWM signal and to decouple the shunt circuitry from the AC voltage source during other portions of the PWM signal. Shunting the AC voltage source causes the interruption of the DC current to effectively turn off the LEDs. Decoupling the shunt circuitry may improve overall efficiency of power transfer to the LEDs.

US Patent:

8487544, Jul 16, 2013

Filed:

Sep 29, 2010

Appl. No.:

12/893628

Inventors:

Valery Godyak - Brookline MA, US
Benjamin Alexandrovich - Brookline MA, US
Robert Martin - Nicholasville KY, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H05B 41/16

US Classification:

315248

Abstract:

A lamp assembly adapted to operate as one of a total number of lamp assemblies that are connected together in series and connected to a ballast. The lamp assembly comprises an electrodeless, closed-loop, tubular lamp envelope enclosing mercury vapor and a buffer gas, and a transformer core disposed around a portion of the lamp envelope. An input winding is disposed on the transformer core so that it has a particular number of turns, N. An auxiliary winding is disposed on the transformer core so that it has a particular number of turns, N. The auxiliary winding is adapted to connect to the ballast and to couple with the input winding. The ratio of the particular number of turns Nto the particular number of turns Nis substantially proportional to the total number of lamp assemblies that are adapted to operate in series together.

US Patent:

20130076270, Mar 28, 2013

Filed:

Sep 23, 2011

Appl. No.:

13/241538

Inventors:

Benjamin Alexandrovich - Brookline MA, US
Charles A. Brunault - Hamilton MA, US

Assignee:

OSRAM SYLVANIA INC. - Danvers MA

International Classification:

H05B 37/02

US Classification:

315362

Abstract:

The present invention provides a lighting fixture including a light source, a light source controller, and an external controller plug. The light source controller controls power to the light source. The external controller plug allows an external controller to selectively engage a power source to the light source controller.

US Patent:

58349057, Nov 10, 1998

Filed:

Mar 27, 1996

Appl. No.:

8/624043

Inventors:

Valery A. Godyak - Brookline MA
Benjamin Alexandrovich - Brookline MA
Robert B. Piejak - Wayland MA
Eugene Statnic - Munich, DE

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01J 6504

US Classification:

315248

Abstract:

An electric lamp assembly includes an electrodeless lamp having a closed-loop, tubular envelope enclosing mercury vapor and a buffer gas at a pressure less than about 0. 5 torr, a transformer core disposed around the lamp envelope, an input winding disposed on the transformer core and a radio frequency power source coupled to the input winding. The radio frequency source supplies sufficient radio frequency energy to the mercury vapor and the buffer gas to produce in the lamp envelope a discharge having a discharge current equal to or greater than about 2 amperes. The electrodeless lamp preferably includes a phosphor on an inside surface of the lamp envelope for emitting radiation in a predetermined wavelength range in response to ultraviolet radiation emitted by the discharge.

US Patent:

58864725, Mar 23, 1999

Filed:

Jul 11, 1997

Appl. No.:

8/893814

Inventors:

Benjamin Alexandrovich - Brookline MA
Valery A. Godyak - Brookline MA
Robert B. Piejak - Wayland MA

Assignee:

OSRAM Sylvania Inc. - Danvers MA

International Classification:

H01J 152

US Classification:

315 85

Abstract:

An electric lamp assembly includes an electrodeless lamp having an electrodeless lamp envelope enclosing a fill material for supporting a low pressure discharge, a driving inductor including a magnetic core disposed in proximity to the lamp envelope and an input winding disposed on the magnetic core, a compensation loop disposed in proximity to the lamp envelope, a radio frequency power source and a compensation loop network. The compensation loop network has an input coupled to the radio frequency power source and outputs coupled to the input winding and to the compensation loop. The radio frequency power source and the compensation loop network supply radio frequency energy to the electrodeless lamp to produce a discharge in the lamp envelope and supply radio frequency energy to the compensation loop to generate a magnetic field that substantially counteracts a magnetic field produced by the discharge. In one embodiment, the lamp envelope is a closed-loop, tubular lamp envelope, and the magnetic core is disposed around the lamp envelope. In another embodiment, the lamp envelope includes a reentrant cavity, and the magnetic core is disposed in the reentrant cavity.

US Patent:

D3841731, Sep 23, 1997

Filed:

Jul 19, 1996

Appl. No.:

D/057205

Inventors:

Valery A. Godyak - Brookline MA
Benjamin Alexandrovich - Brookline MA
James N. Lester - Essex MA

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

2604

US Classification:

D26 3