US2836294A - Pitch cartridge for electrode joint - Google Patents

Pitch cartridge for electrode joint Download PDF

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Publication number
US2836294A
US2836294A US547237A US54723755A US2836294A US 2836294 A US2836294 A US 2836294A US 547237 A US547237 A US 547237A US 54723755 A US54723755 A US 54723755A US 2836294 A US2836294 A US 2836294A
Authority
US
United States
Prior art keywords
pitch
nipple
cartridge
electrode
joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US547237A
Other languages
English (en)
Inventor
Harry V Johnson
Neal J Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE541856D priority Critical patent/BE541856A/xx
Priority to US2735705D priority patent/US2735705A/en
Priority to NL96582D priority patent/NL96582C/xx
Priority to NL201029D priority patent/NL201029A/xx
Priority to GB28458/55A priority patent/GB807788A/en
Priority to FR1141464D priority patent/FR1141464A/fr
Priority to CH328254D priority patent/CH328254A/fr
Priority to DEU3552A priority patent/DE1030482B/de
Application filed by Union Carbide Corp filed Critical Union Carbide Corp
Priority to US547237A priority patent/US2836294A/en
Application granted granted Critical
Publication of US2836294A publication Critical patent/US2836294A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/14—Arrangements or methods for connecting successive electrode sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/47—Molded joint
    • Y10T403/472—Molded joint including mechanical interlock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/47—Molded joint
    • Y10T403/477—Fusion bond, e.g., weld, etc.
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/55—Member ends joined by inserted section
    • Y10T403/556—Section threaded to member

Definitions

  • This invention relates to a pitch cartridge for a joint between sections of an electric furnace electrode and has for an object to provide a cartridge for an improved joint of this class which is easier to make and assemble and has less danger of the pitch melting prematurely.
  • a later improvement sought the same freedom from flexure in the nipple with satisfactory electrical conductivity in the end face contact by eliminating the itch reservoir in the end face and transferring it to each end of the nipple with only about 10% to 25% of the thread clearance space volume being filled with pitch.
  • a satisfactory electrode joint has been developed which possesses the advantages of a nippic that does not have to transmit a major portion of liexural stresses between electrode sections, has satisfactory electrical conductivity, adequate tightness to prevent an electrode section coming unscrewed with respect to the nipple, foolproofness whereby it is immaterial which end of a section and nipple is at the top or bottom, requires less pitch or other thermal setting bonding material, is one in which it is simpler and easier to form the pitch reservoir and install the pitch therein, and this joint is constructed to reduce the danger of the pitch flowing out of the reservoir prematurely and before the joint has been fully formed.
  • the nipple is provided adjacent each end with a diametral or radial recess into which the pitch or other thermal setting binder is inserted.
  • the pitch is preshaped into the form of a stick of a size to be easily inserted in the recesses adjacent each end of the nipple, and the pitch is surrounded by a thermal insulating wrapper which delays the time required for the pitch to melt to an amount such that when the pitch cartridge is inserted in a nipple heated to a temperature above the melting point of the pitch, there will be ample time for the joint to be fully assembled after the last stick of pitch has been inserted. Upon heating, the pitch melts and flows into only about 10% of the thread clearance volume and adjacent each end of the nipple.
  • Fig. 1 is a longitudinal section through an electrode joint embodying this invention
  • Fig. 2 is a longitudinal section of a modified construction
  • Fig. 4 is a perspective showing the pitch cartridge.
  • the furnace electrode joint in Fig. 1 comprises the lower electrode section 10, the. upper electrode section 11 and the nipple 12 in threaded engagement with each section holding their end faces in mechanical and electrical contact as shown at 13.
  • a diametral recess 14 is bored into the upper portion of the nipple l2 and a similar recess 15 adjacent the lower end of the nipple is also cut.
  • a preformed cartridge 16 of pitch having a melting temperature between about C. and 200 C. As is well known in the art, the pitch in this cartridge melts. on heating. It flows out of its diametral recess into the clearance spaces indicated in Fig.
  • the quantity of pitch is insuflicient to fill all such clearance spaces and only about 10% to 20% of the volume of such clearance spaces is supplied with this pitch and the pitch is located adjacent the ends of the nipple after it has become set.
  • the joint is not so stiff but permits a slight tilting or sliding of the nipple with respect to each section in order that fiexural stresses may not in large measure have to be borne by the nipple because the joint is usually of less strength to Withstand such stresses than are the electrode sections.
  • the preformed cartridge of pitch has a wrapper of thermal insulatin material around it as shown in Figs. 3 and 4.
  • a wrapper of thermal insulatin material around it as shown in Figs. 3 and 4.
  • the cartridge Around the outside or" the cartridge is a layer of aluminum foil 17 to reflect radiant heat from the nipple from penetrating the cartridge and melting the pitch prematurely.
  • a layer of fibrous insulating material 18 to delay conduction of heat from the nipple to the pitch.
  • the fibrous material 13 is constituted by about 14 layers of kraft paper in a cartridge for a 20 inch diameter electrode. The efifect of this wrapping is to delay the melting of the pitch 19 as much as one to six minutes before it flows into the helical clearance spaces 29.
  • Fig. 2 wherein is represented a furnace electrode joint comprising a lower electrode section 10a, an upper electrode section Ila, and a connecting nipple 12a in threaded engagement therewith, holding the sections in electric and mechanical contact as shown at 13a, the pitch recesses 14a and 15:: are radial and the pitch cartridge 16a is of shorter length than is the cartridge in Fig. 1 for the same size electrode and nipple. No large number of radial cartridges will be needed because the clearance space to be filled is small.
  • non-conductive cementitious binder may also be used in place of the pitch, but preferably such a binder should be thermal setting.
  • non-conductive binders include water glass and Saureisen cement.
  • the cartridge recesses in the nipple are drilled adjacent the top and bottom without having to invert or change the position of the nipple.
  • the thermally insulated pitch cartridge of this invention is especially needed.
  • the electrode section may be connected far enough away from the furnace roof for the thermally insulated pitch cartridge to be unnecessary.
  • a cartridge is placed into one end of the nipple before the v V c; ,2 nipple is threaded intothe heated lower section.
  • nipple and the electrode sections are both capable of being. attached with either end upward, thus providing a foolproof jointpthat is one in which the workman need not be required to be sure that one end of the nipple or of an electrode section is intended to be at the bottom of thejoint
  • the present joint is free of the disadvantage of having considerable nipple breakage due to the joint being too stifif.
  • thejelectrode joint in the'prior application of H. V. Johnson As compared with thejelectrode joint in the'prior application of H. V. Johnson,
  • the pitch reservoirs 16 and 16a were placed about one and a half inches from each end.
  • the quantity of pitch found desirable is in the range of .02 to .11 of a pound for this foregoing the melting point of said pitch are encountered, said pitch having "a melting temperature between about C. and 200 C., said cartridge being provided with a fibrous, thermally insulating jacket to defer the time of that a pitch application Serial melting said pitch for overa minute, despite the fact,
  • said nipple is at. a temperature above the melting point of said pitch, said jacket being consumable at a temperature well above that at which said pitch melts and having an outer wrapping of heat-reflective foil.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)
US547237A 1954-10-12 1955-11-16 Pitch cartridge for electrode joint Expired - Lifetime US2836294A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL96582D NL96582C (enrdf_load_stackoverflow) 1954-10-12
NL201029D NL201029A (enrdf_load_stackoverflow) 1954-10-12
BE541856D BE541856A (enrdf_load_stackoverflow) 1954-10-12
US2735705D US2735705A (en) 1954-10-12 Electrode joint
GB28458/55A GB807788A (en) 1954-10-12 1955-10-06 Pitch cartridge for electrode joint
FR1141464D FR1141464A (fr) 1954-10-12 1955-10-07 Jointure d'électrode
CH328254D CH328254A (fr) 1954-10-12 1955-10-07 Electrode en carbone, constituée par plusieurs tronçons raccordés les uns aux autres
DEU3552A DE1030482B (de) 1954-10-12 1955-10-12 Einrichtung zum Verkitten der Nippelverschraubung von Elektroden fuer elektrische OEfen
US547237A US2836294A (en) 1954-10-12 1955-11-16 Pitch cartridge for electrode joint

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46171454A 1954-10-12 1954-10-12
US547237A US2836294A (en) 1954-10-12 1955-11-16 Pitch cartridge for electrode joint

Publications (1)

Publication Number Publication Date
US2836294A true US2836294A (en) 1958-05-27

Family

ID=27040103

Family Applications (2)

Application Number Title Priority Date Filing Date
US2735705D Expired - Lifetime US2735705A (en) 1954-10-12 Electrode joint
US547237A Expired - Lifetime US2836294A (en) 1954-10-12 1955-11-16 Pitch cartridge for electrode joint

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US2735705D Expired - Lifetime US2735705A (en) 1954-10-12 Electrode joint

Country Status (7)

Country Link
US (2) US2836294A (enrdf_load_stackoverflow)
BE (1) BE541856A (enrdf_load_stackoverflow)
CH (1) CH328254A (enrdf_load_stackoverflow)
DE (1) DE1030482B (enrdf_load_stackoverflow)
FR (1) FR1141464A (enrdf_load_stackoverflow)
GB (1) GB807788A (enrdf_load_stackoverflow)
NL (2) NL201029A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3147793A1 (de) * 1981-12-03 1983-06-09 Sigri Elektrographit Gmbh, 8901 Meitingen Fertigungsstrasse fuer graphitnippel mit vorrichtungen zur herstellung von speicherbohrungen und zum fuellen der bohrungen mit einem binder
EP0260529A1 (en) * 1986-09-05 1988-03-23 Union Carbide Corporation Electrode joint

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828162A (en) * 1953-09-11 1958-03-25 Union Carbide Corp Furnace-electrode joint
US2836806A (en) * 1955-06-02 1958-05-27 Union Carbide Corp Conductive pad for electrode joint
BE555170A (enrdf_load_stackoverflow) * 1956-02-23 1900-01-01
FR1194249A (enrdf_load_stackoverflow) * 1957-04-11 1959-11-06
DE1272472B (de) * 1957-04-11 1968-07-11 Sigri Elektrographit Gmbh Verbindung von Kohle- oder Graphitelektroden fuer elektrische OEfen mittels doppelkonischer Gewindenippel
US2941828A (en) * 1957-09-27 1960-06-21 Speer Carbon Company Electrode connecting nipple and joint
US2970854A (en) * 1958-08-06 1961-02-07 Union Carbide Corp Electrode joint
US3134616A (en) * 1958-11-07 1964-05-26 Siemens Planiawerke Ag Double-conical nipple joint for carbon electrodes
US3075640A (en) * 1959-12-14 1963-01-29 Kenneth T Snyder Bituminous composition package and method of applying same
DE1294578B (de) * 1963-08-16 1969-05-08 Conradty Fa C Verfahren zur Sicherung der Schraubverbindung zwischen Kohle- oder Graphitelektroden und Sicherungsformling zur Durchfuehrung des Verfahrens
US3858994A (en) * 1971-09-27 1975-01-07 Carborundum Co Electrode nipple drilling machine and process
CA1212551A (en) * 1984-01-13 1986-10-14 Wilfred J. Degelman Transportable wide swath trailing implement
US4813805A (en) * 1988-05-05 1989-03-21 Union Carbide Corporation Joint for carbon electrodes
DE9115816U1 (de) * 1991-12-20 1992-02-13 SGL CARBON AG, 65203 Wiesbaden Masse zur Sicherung einer Schraubverbindung zwischen Kohlenstoff- oder Graphitelektroden
DE10253254B3 (de) * 2002-11-15 2004-05-27 Sgl Carbon Ag Elektrodenverbindung mit beschichteten Kontaktflächen
US6952438B2 (en) * 2003-10-31 2005-10-04 Sgl Carbon Ag Threaded connection for carbon and/or graphite electrode columns
DE102013216452B4 (de) 2013-08-20 2016-12-01 Sgl Carbon Se Verbesserte Elektroden/Nippel-Verbindung
CN105643769A (zh) * 2015-04-24 2016-06-08 洛阳高新永杰钨钼材料有限公司 一种钨电极
DE202016005400U1 (de) 2016-09-06 2016-11-11 Sgl Carbon Se Kittstift Behältnisse für Verbindungen zwischen Elektroden

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2348622A (en) * 1941-10-29 1944-05-09 Standard Oil Dev Co Removable liner for viscous material containers
FR63481E (fr) * 1952-11-07 1955-09-28 Fabrication Des Produits Aspha Pellicule d'emballage bitumineuse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921944A (en) * 1932-05-23 1933-08-08 Air Way Electric Appl Corp Renewable wax cartridge for wax applicators
US2033122A (en) * 1933-09-23 1936-03-10 American Radiator Co Method of sweat fitting
US2352865A (en) * 1940-07-01 1944-07-04 Smith Harry Container for asphalt, tar, and like products
US2616384A (en) * 1948-03-11 1952-11-04 Frank D Mcbride Fluxing stick
US2510230A (en) * 1949-01-15 1950-06-06 Union Carbide & Carbon Corp Electrode joint

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2348622A (en) * 1941-10-29 1944-05-09 Standard Oil Dev Co Removable liner for viscous material containers
FR63481E (fr) * 1952-11-07 1955-09-28 Fabrication Des Produits Aspha Pellicule d'emballage bitumineuse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3147793A1 (de) * 1981-12-03 1983-06-09 Sigri Elektrographit Gmbh, 8901 Meitingen Fertigungsstrasse fuer graphitnippel mit vorrichtungen zur herstellung von speicherbohrungen und zum fuellen der bohrungen mit einem binder
EP0081105A1 (de) * 1981-12-03 1983-06-15 SIGRI GmbH Fertigungsstrasse für Graphitnippel mit Vorrichtungen zur Herstellung von Speicherbohrungen und zum Füllen der Bohrungen mit einem Binder
EP0260529A1 (en) * 1986-09-05 1988-03-23 Union Carbide Corporation Electrode joint

Also Published As

Publication number Publication date
NL201029A (enrdf_load_stackoverflow) 1900-01-01
GB807788A (en) 1959-01-21
CH328254A (fr) 1958-02-28
NL96582C (enrdf_load_stackoverflow) 1900-01-01
DE1030482B (de) 1958-05-22
FR1141464A (fr) 1957-09-03
US2735705A (en) 1956-02-21
BE541856A (enrdf_load_stackoverflow) 1900-01-01

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