Graphite body

• US 5,015,518 A
• Filed: 05/30/1989
• Issued: 05/14/1991
• Est. Priority Date: 05/14/1985
• Status: Expired due to Fees

• Current Assignee: Toyo Carbon Co. Ltd. (Tokai Carbon (Dalian) Co., Ltd.)
• Original Assignee: Toyo Carbon Co. Ltd. (Tokai Carbon (Dalian) Co., Ltd.)
• Inventors: Takaishi, Kunio, Sasaki, Yoshito
• Primary Examiner(s): Robinson, Ellis P.
• Assistant Examiner(s): Loney, Donald J.
• Application Number:
  US07/361,766
• Time in Patent Office: 714 Days
• Field of Search: 428/33, 428/57, 428/58, 428/192, 428/367, 428/397, 428/398, 428/399, 428/400, 428/408, 428/53, 428/54, 428/56, 428/119, 428/120, 428/167, 428/189, 428/358, 428/364, 428/397 , 428/689, 428/704, 373/91, 373/92, 373/88, 373/93, 373/94, 373/95, 373/96, 403/331, 403/381
• US Class Current: 428/192
• CPC Class Codes: F16B 3/00 Key-type connections; Keys F16B2/00 takes precedence; for rods or tubes mutually F16B7/00
• CPC Class Codes: H05B 7/085 mainly consisting of carbon
• CPC Class Codes: H05B 7/14 Arrangements or methods for connecting successive electrode sections
• CPC Class Codes: Y02P 10/25 Process efficiency
• CPC Class Codes: Y10T 428/17 Three or more coplanar interfitted sections with securing means
• CPC Class Codes: Y10T 428/187 Continuous sectional layer
• CPC Class Codes: Y10T 428/192 Sheets or webs coplanar
• CPC Class Codes: Y10T 428/24182 Inward from edge of web or sheet
• CPC Class Codes: Y10T 428/2457 Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/2902 Channel shape
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2978 Surface characteristic
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

A graphite body which is capable of connecting a plurality of the graphite bodies one by one. The graphite body includes one connecting end surface having a T-shaped mound and the other connecting end surface having an inverted T-shaped groove so that the graphite bodies may be connected by means of the mound and groove. The mound and groove each have a width linearly varied in the longitudinal direction thereof.

Claims

1. A graphite arc furnace electrode comprising:

an elongated graphite body having substantial length and diameter;

connecting end surfaces formed on said graphite body for connecting said graphite body to another graphite body;

a T-shaped mound formed on one connecting end surface extending across the middle portion thereof;

an inverted T-shaped groove formed on the other connecting end surface extending across the middle portion thereof;

said mound and groove being gradually decreased in width longitudinally toward one end thereof, the width of said mound being in a range of 1/3 to 2/3 based on the length of lateral direction of said connecting end surface at the central point of height and length of said mound, said mound having a lateral inclination of 45 to 87 degrees with respect to said connecting end surface, the maximum width of an upper surface of said mound being 3/4 or less based on the length of lateral direction of said connecting end surface and the minimum width of a base of said mound being 1/4 or more based thereon.

2. The graphite arc furnace electrode as defined in claim 1, wherein the width of said T-shaped mound or groove is enlarged from a lower side of said connecting end surface to an upper side thereof in the slanting direction thereof.

3. The graphite arc furnace electrode as defined in claim 1, wherein said T-shaped mound is formed in the longitudinal direction of said connecting end surface.

4. The graphite arc furnace electrode as defined in claim 1, wherein said T-shaped mound extends between the central portions of two opposite sides of said connecting end surface.

5. The graphite arc furnace electrode as defined in claim 1, wherein said T-shaped mound extends in the direction of a diagonal line of said connecting end surface.

6. The graphite arc furnace electrode as defined in claim 1, wherein said connecting end surface is slanted against a horizontal plane of the graphite body.

7. The graphite arc furnace electrode as defined in claim 6, wherein said T-shaped mound is formed in the longitudinal direction of said connecting end surface.

8. The graphite arc furnace electrode as defined in claim 6, wherein said T-shaped mound extends between the central portions of two opposite sides of said connecting end surface.

9. The graphite arc furnace electrode as defined in claim 6, wherein said T-shaped mound extends in the direction of a diagonal line of said connecting end surface.