Robert E Levin

US Patent:

8592829, Nov 26, 2013

Filed:

Aug 17, 2010

Appl. No.:

13/389109

Inventors:

John Selverian - North Reading MA, US
Robert E. Levin - Salem MA, US

Assignee:

Osram Sylvania Inc. - Danvers MA

International Classification:

H01L 33/00

US Classification:

257 79

Abstract:

A phosphor blend for an LED light source is provided wherein the phosphor blend comprises from about 7 to about 12 weight percent of a cerium-activated yttrium aluminum garnet phosphor, from about 3 to about 6 weight percent of a europium-activated strontium calcium silicon nitride phosphor, from about 15 to about 20 weight percent of a europium-activated calcium silicon nitride phosphor, and from about 55 to about 80 weight percent of a europium-activated calcium magnesium chlorosilicate phosphor. An LED light source in accordance with this invention has a B:G:R ratio for a 3200K tungsten balanced color film of X:Y:Z when directly exposed through a nominal photographic lens, wherein X, Y and Z each have a value from 0. 90 to 1. 10.

US Patent:

20120126253, May 24, 2012

Filed:

Aug 17, 2010

Appl. No.:

13/388953

Inventors:

John Selverian - North Reading MA, US
Robert E. Levin - Salem MA, US

Assignee:

OSRAM SYLVANIA INC. - Danvers MA

International Classification:

H01L 33/00
C09K 11/86

US Classification:

257 79, 2523014 F, 257E33001

Abstract:

There is provided a phosphor blend for an LED light source comprising from about 25 to about 35 weight percent of a cerium-activated yttrium aluminum garnet phosphor, from about 5 to about 10 weight percent of a europium-activated strontium calcium silicon nitride phosphor, and from about 50 to about 75 weight percent of a europium-activated calcium magnesium chlorosilicate phosphor. An LED light source in accordance with this invention has a B:G:R ratio for a 5500 K daylight balanced color film of X:Y:Z when directly exposed through a nominal photographic lens, wherein X, Y and Z each have a value from 0.90 to 1.10.

US Patent:

52724069, Dec 21, 1993

Filed:

May 15, 1992

Appl. No.:

7/883978

Inventors:

Kirti B. Chakrabarti - Lynnfield MA
Robert E. Levin - Hamilton MA

Assignee:

GTE Products Corporation - Danvers MA

International Classification:

H01J 6142
H01J 6134
H01J 6135

US Classification:

313 25

Abstract:

A source of red light includes a double-bore capillary tube having a pair of ends and a convoluted shape. A pair of electrodes is located at one end of the capillary tube and disposed within respective bores. An ionizable medium is enclosed within the capillary tube and includes neon at a pressure from about 300 to 600 torr. When energized, the ionizable medium generates an arc discharge between the electrodes consisting primarily of radiation in the range of from 590 to 670 nanometers. An outer jacket of vitreous material may surround the capillary tube and contain an inert gas (e. g. , nitrogen) at a predetermined pressure.

US Patent:

40485374, Sep 13, 1977

Filed:

Jun 4, 1976

Appl. No.:

5/693026

Inventors:

Ronald G. Blaisdell - Saugus MA
Harold L. Hough - Beverly MA
Robert E. Levin - Hamilton MA

Assignee:

GTE Sylvania Incorporated - Salem MA

International Classification:

H01J 6140
H01J 6142

US Classification:

313489

Abstract:

A protective shield for an ultraviolet-emitting fluorescent lamp comprising a tubular sleeve coaxially surrounding the lamp envelope and formed of a plastic material, such as a fluorocarbon resin of a fluorinated ethylene-propylene, which has a spectral transmittance of at least about 80 percent of the ultraviolet radiation emitted from the lamp over the wavelength range from about 320 to 400 nanometers and substantially maintains such transmittance, along with mechanical integrity, after at least about 1000 hours of lamp operation.

US Patent:

41692381, Sep 25, 1979

Filed:

Sep 6, 1978

Appl. No.:

5/939928

Inventors:

George J. English - Reading MA
Robert E. Levin - South Hamilton MA

Assignee:

GTE Sylvania Incorporated - Stamford CT

International Classification:

H01K 114
H01K 132

US Classification:

313 1

Abstract:

A movie light including a plastic holder, a pair of spaced-apart incandescent lamp units positioned within the holder, and means for electrically connecting the lamp units to an external power source. Each lamp unit comprises a formed glass reflector which has an internal reflective surface containing three separate diffusing regions, the most diffusing of which is oriented nearest and about the reflector's optical axis. Each unit also includes a low voltage tungsten-halogen lamp located within the reflector and having a planar single filament therein. An incandescent lamp unit suitable for use in the movie light and a reflector for use therewith are also disclosed.

US Patent:

51343363, Jul 28, 1992

Filed:

May 13, 1991

Appl. No.:

7/698883

Inventors:

Kirti B. Chakrabarti - Lynnfield MA
Robert E. Levin - Hamilton MA

Assignee:

GTE Products Corporation - Danvers MA

International Classification:

H01J 6142
H01J 6134
H01J 6135

US Classification:

313 25

Abstract:

A miniature, low-wattage fluorescent lamp includes a double-bore inner capillary tube having a pair of ends and a convoluted shape. The inner capillary tube is comprised of a vitreous material (e. g. , quartz) which is capable of transmitting ultraviolet radiation. A pair of electrodes (e. g. , mercury pool) is located at one end of the inner capillary tube and disposed within respective bores. An ionizable medium is enclosed within the inner capillary tube and includes an inert starting gas and a quantity of mercury. When energized, the ionizable medium generates an arc discharge between the electrodes consisting of ultraviolet radiation. A phosphor coating responsive to the ultraviolet radiation is disposed on an outer surface of the inner capillary tube and remote from the arc discharge. An outer jacket of vitreous material surrounds the inner capillary tube and contains an inert gas at a predetermined pressure.

US Patent:

D2483157, Jun 27, 1978

Filed:

Feb 24, 1976

Appl. No.:

5/660947

Inventors:

Ronald G. Blaisdell - Saugus MA
Harold L. Hough - Beverly MA
Robert E. Levin - Hamilton MA

Assignee:

GTE Sylvania Incorporated - Stamford CT

International Classification:

D2401

US Classification:

D24 39

US Patent:

D2833620, Apr 8, 1986

Filed:

Apr 10, 1984

Appl. No.:

6/598607

Inventors:

Robert E. Levin - Reading MA
George J. English - Reading MA

Assignee:

GTE Products Corporation - Stamford CT

US Classification:

D26122