Naim S Hemmat

US Patent:

43018548, Nov 24, 1981

Filed:

Sep 4, 1979

Appl. No.:

6/072494

Inventors:

John R. Bedell - Sparta NJ
Naim Hemmat - Mendham NJ
Donald E. Polk - Boston MA

Assignee:

Allied Corporation - Morris Township, Morris County NJ

International Classification:

B22D 1106

US Classification:

164479

Abstract:

Improvement in apparatus for making metal filament by depositing a stream of molten metal onto the inner surface of an annular chill roll as it is being rotated includes provision of a rotatably mounted annular chill roll having an inner surface substantially parallel to its axis of rotation, and means for stripping the metal filament from the inner surface of the chill roll and for guiding the stripped metal filament away from the chill roll.

US Patent:

42744733, Jun 23, 1981

Filed:

Jan 14, 1980

Appl. No.:

6/111748

Inventors:

John R. Bedell - Madison NJ
Sheldon Kavesh - Whippany NJ
Naim S. Hemmat - Mendham NJ
Seymour Draizen - Old Bridge NJ
Robert W. Smith - Long Valley NJ

Assignee:

Allied Chemical Corporation - Morris Township, Morris County NJ

International Classification:

B22D 1106

US Classification:

164423

Abstract:

An apparatus is provided for planar flow casting of metal ribbon. The apparatus comprises a movable chill surface, a reservoir for holding molten metal and a slotted nozzle whose lips are located close to the chill surface. In operation, molten metal is forced through the nozzle onto the chill surface to form a melt puddle. Rapid cooling of the molten metal results in the formation of a continuous ribbon. Ribbon contour is controlled through the use of nozzle designs that provide reproducible configuration of the melt puddle and reduce turbulent air flow over the molten metal surface.

US Patent:

49602454, Oct 2, 1990

Filed:

May 3, 1989

Appl. No.:

7/346953

Inventors:

Naim S. Hemmat - Mendham NJ

Assignee:

Electric Power Research Institute - Palo Alto CA

International Classification:

B05B 100
B22D 4108

US Classification:

239597

Abstract:

A continuous casting nozzle for controllably casting an elongated ribbon has a discharge slot extending completely across an exterior surface of the nozzle in fluid communication with an internally disposed through flow passage. Refractory insert material compatible with the nozzle material, such as refractory cement, is filled into the longitudinal ends of the discharge slot to define the width of a centrally disposed discharge slot for the nozzle. The continuous groove with insert material allows for economy and flexibility in the nozzle manufacturing process and results in a nozzle having an adjustable discharge slot width less susceptible to stress cracks.

US Patent:

41845323, Jan 22, 1980

Filed:

Oct 5, 1977

Appl. No.:

5/839546

Inventors:

John R. Bedell - Sparta NJ
Naim Hemmat - Mendham NJ
Donald E. Polk - Boston MA

Assignee:

Allied Chemical Corporation - Morristown NJ

International Classification:

B22D 1106

US Classification:

164 64

Abstract:

Improvement in apparatus for making metal filament by depositing a stream of molten metal onto the inner surface of an annular chill roll as it is being rotated includes provision of a rotably mounted annular chill roll having an inner surface substantially parallel to its axis of rotation, and means for stripping the metal filament from the inner surface of the chill roll and for guiding the stripped metal filament away from the chill roll.

US Patent:

48436925, Jul 4, 1989

Filed:

Jan 17, 1983

Appl. No.:

6/458765

Inventors:

Naim S. Hemmat - Mendham NJ

Assignee:

Electric Power Research Institute - Palo Alto CA

International Classification:

B22D 4108

US Classification:

29157C

Abstract:

A continuous casting nozzle for controllably casting an elongated ribbon has a discharge slot extending completely across an exterior surface of the nozzle in fluid communication with an internally disposed through flow passage. Refractory insert material compatible with the nozzle material, such as refractory cement, is filled into the longitudinal ends of the discharge slot to define the width of a centrally disposed discharge slot for the nozzle. The continuous groove with insert material allows for economy and flexibility in the nozzle manufacturing process and results in a nozzle having an adjustable discharge slot width less susceptible to stress cracks.

US Patent:

41246985, Nov 7, 1978

Filed:

Feb 14, 1977

Appl. No.:

5/768186

Inventors:

Naim Hemmat - Mendham NJ
Harold E. Labelle - Hanover MA
Charles Lamport - Tewksbury MA

Assignee:

Tyco Laboratories, Inc. - Exeter NH

International Classification:

C01F 702
C23F 102

US Classification:

156637

Abstract:

The invention is a method for sharpening opposed edges of a monocrystalline ribbon. The method consists of suspending a monocrystalline body of a material such as alpha-alumina in the form of a ribbon (or plate) in a body of a selected solvent, and providing relative movement between the ribbon and solvent with the direction of relative movement being generally normal to the plane of the ribbon.

US Patent:

42904765, Sep 22, 1981

Filed:

Jan 14, 1980

Appl. No.:

6/112006

Inventors:

Robert W. Smith - Long Valley NJ
Naim S. Hemmat - Mendham NJ
John R. Bedell - Madison NJ
Sheldon Kavesh - Whippany NJ
Seymour Draizen - Old Bridge NJ

Assignee:

Allied Chemical Corporation - Morris Township, Morris County NJ

International Classification:

B22D 1106

US Classification:

164423

Abstract:

An apparatus is provided for planar flow casting of metal ribbon. The apparatus comprises a movable chill surface, a reservoir for holding molten metal and a slotted nozzle whose lips are located close to the chill surface. In operation, molten metal is forced through the nozzle onto the chill surface to form a melt puddle. Rapid cooling of the molten metal results in the formation of a continuous ribbon. The nozzles of this invention provide a planar bottom surface which includes the leading edge of the first lip and the side edges at the bottom of the lips and which is as close or closer to the chill surface than is any other point on the lips. The nozzle reduces air flow around the melt puddle and thereby improves ribbon uniformity.

US Patent:

44334745, Feb 28, 1984

Filed:

Oct 8, 1981

Appl. No.:

6/309808

Inventors:

Naim Hemmat - Mendham NJ

Assignee:

Electric Power Research Institute, Inc. - Palo Alto CA

International Classification:

H01F 706

US Classification:

29605

Abstract:

A magnetic core with reduced losses is provided along with a related improvement in the process for fabricating magnetic cores for electromagnetic devices from strips of amorphous magnetic alloys. Magnetic powder, or magnetic powder mixed with a suitable carrier, is applied to the core for filling gaps occurring between the layers of the amorphous strips.