US2876190A - Duct anode - Google Patents

Duct anode Download PDF

Info

Publication number
US2876190A
US2876190A US50177955A US2876190A US 2876190 A US2876190 A US 2876190A US 50177955 A US50177955 A US 50177955A US 2876190 A US2876190 A US 2876190A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
anode
connector
conductor
ends
fig
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
Inventor
John P Oliver
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
Grant date

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/20Conducting electric current to electrodes
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/32Pipes

Description

J.. P. OLIVER Ducmn ANODE March 3, 1959 Filed April 18, 1955 INVENTQR JOHN P. OLIVER ATTORNEY United States Patent '0 DUCT ANODE John P. Oliver, Berea, Ohio, assignor to Union Carbide Corporation, a corporation of New York Application April 18, 1955, Serial No. 501,779

1 Claim. (Cl. 204-196) This invention relates to spaced anodes adapted for use in ducts and elsewhere, that is, to anodes which are capable of being pulled into or through a duct or conduit. An object is to provide such an anode that is capable of being pulled into a duct with safety and convenience. Another object is to provide spaced anodes in which a continuous electricalconductor ofmetal extends entirely through each anode and is adapted to withstand any additional stress without transmitting such stress through the carbonaceous anode material.

The prior type of protective anodewas providedwith a short pigtail by means of which it was connected with a conductor for receiving electric current. Such a construction was not well suited for being pulled through a duct of nearly the size of an anode. According to this invention there is provided an anode and supply conductor of a type readily adapted to be pulled into and through a duct. i

More specifically a carbonaceous anode, preferably of graphite is in two halves. A conductor is cut it necessary where the anode is to be located. After severing the conductor each anode half portion is slipped over one of the cut ends and moved back from such end. The ends of the conductor are then electrically connected by some type of connector capable of transmitting substantial tension applied to the conductor. Such connector is provided with threads at its outer surface intermediate its ends. The anode halves are then moved onto and threaded over such connector with their adjacent ends abutting one another, or nearly so.

Referring to the drawings Fig. 1 is a longitudinal partial section of an anode and conductor made according to this invention.

Fig. 2 is a longitudinal view, partially in section of the connector and conductors of Fig. l with the anode removed.

Fig. 3 is a longitudinal section through a modified form of a connector but not having the anode in place.

Fig. 4 is a section on the line 4-4 of Fig. 5 and showing a further modified connector with no anode in po sition.

Fig. 5 is a transverse cross section through the connector of Fig. 4.

Fig. 6 shows a plurality of anodes connected by the conductor and spaced as desired.

In Fig. 1 the anode 10 comprises two half sections as illustrated each of which is threaded on an electrical and metallic connector 14 into which the bared ends of the conductors 11 are inserted. A slight space 12 between the ends of the conductors 11 is provided though not necessary, it being desirable that each end of the conductors 11 be inserted into the connector 14 a substantially similar amount so that the resistance between the connector and each conductor may be substantially the same.

Where the anode is to be located the conductor 11 provided with insulation 13 is cut and each of the severed ends is bared for a distance at least about half the length 2,876,190 Patented Mar. 3, 1959 of the connector 14. Over each of the severed ends an anode half portion 10 is slippedand pushed back far enough not to interfere with effecting the connection between the connector 14 and each of the ends of the conductor 11. The connector illustrated in Figs. 1 and 2 is of a well-known type commercially called a Burndy Crimpit or Hy-Splice. As illustrated the central portion of the connector is screw threaded at 16 leaving the end portions unthreaded. After insertion of the ends of the conductors 11 a tool is applied to crimp or press in localized portions of the-ends of the connector. Being of soft metal such as copper or other appropriate conductive alloy the crimping tool is able to press in portions and effect a slight distortion of the stranded conductor as shown at 17 in Fig. 2. This inventionis not limited to any particular type of connector since many kinds of I connectors are suitable, although it is preferable that the a screw threaded engagement between the inner surface of the anode sections and outer surface of the connector. When the ends 11 of the conductor have been inserted and connected as described the anode half portions are screwed onto the connector until they substantially abut one another as shown in Fig. 1. To provide a Waterproof filling within each anode half section between the connector, conductor and anode some appropriate plastic or cement is poured or forced into the anode through holes 23 and 24 shown in Fig. 1 provided for that purpose, until it exudes slightly out the ends of the anode sections and also out through the space 25 between anode half section's. Many types of waterproof plastic cements are appropriate, both the true thermoplastic and the thermosetting resinous plastics and other commercial waterproof types well known in the art. When an insulating plastic is used as the filler, the fit must be good to avoid the insulating material getting into the space between the threads and the anode to reduce the desirable electrical conductivity of the anode connection. A layer of cement or plastic is applied at the abutting ends of the anode section as shown at 25, suitably by application to the end to be abutted. The electrical resistance of the connector illustrated in Fig. 1 has been found to be as low as .0005 ohm between a conductor 11 and the graphite anode. A carbonaceous anode is preferred and has been found to possess a longer life than the usual metal anodes, but the use of such carbonaceous material as the anode is not considered new in this invention. Due to the higher electrical conductivity of graphite as compared with amorphous carbon, the graphite is preferred as the anode material.

The connector 18 shown in Fig. 3 is of a somewhat similar nature to that shown in Figs. 1 and 2. Its central portion is threaded at 16a for cooperation with a graphite anode not shown. Set screws 19 and 20 or a plurality of them in each end of the connector provide satisfactory connections between the conductor strands and the connector. As illustrated in Fig. 1 the anode half sections extend over at least part of the insulated portions 13a of the conductor.

In Figs. 4 and 5 is shown another embodiment of an appropriate connector which may be of lead or other soft metal crimped on the cable with a hand die to preserve the thread, the slot 22 being formed to enable the connector to be deformed slightly in clamping it on the conductor end 11b. As before the screw threads 16b are for the purpose of cooperating with the threads on the inside of the anode sections. Some well known type of waterproof cement is also preferably used to fill the inside of the anode and prevent access of water to the connector 21 and around the insulated portions 131; of the conductor within the anode.

lumnae Fig. 6 shows how a plurality of anode sections 10 may be sp aced apart whatever amount is desired or' found convenient, ;the spacing being dependent on the locations at which; the insulated; conductor 11- is cut. The, appear: ance ofcutportions of the. Conductor 11in Fig, 6 must not be. misleading'as this appearance is made to indicate portions, of the conductor being, broken away, as the drawing. is not large enough toshow the anode sections with the customary spacing, between them. It will be understood that the cut, portions of the conductor 11 are within each anode and approximately adjacent the contiguousends of the. anode half sections.

An advantage of this invention resides in the provision ofananode construction inwhich the anodes may be spaced apart. whatever amount is desired and the cut portions. of the conductor. are electrically, connected to be capable of. withstanding. tensional stress incident to. pulling the'anod'es through a duct or conduit without having any of.,such. tensional' stress borne by a carbonaceous anode, The principal stress to which the, anode is. subjectedis a slight compression due to friction between the outer surface of the anode and an inner surface of' a duct. The provision of tensional stress in the conductor cement has been found to he the preferred waterproof type of filling. v The use of the crimped ends. on the connector shown in Figs, land 2 or the set screws shown in. Fig, 3 provide a, satisfactory low, resistancebetween the connector and each of the hated conductor ends without,v having to solder any of the joints, though, of

course,, when. desired, solder. is notiprecludedl Another place .where the construction. of the presentinvention has,

been found desirableis around the hulls of metal ships,

the supporting conductor 11 there serving to support the anodes and hold them in thedesired spaced operating" condition as well as provide a supply conductor for cur rent which is to be dissipated from the anodes. In brief, this duct anode and its connection is useful outside of a pipe or duct where anodes have heretofore been used.

I claim:

A structure adapted to use in a cathode protective system which structure comprises a plurality of series disposed conductor cables, each pair of adjacent conductor cable ends having an electrically conductive connector for electrically uniting said cable ends and physically connectin'gsaidcahle ends to transmit tensile forces; therealong, a pair of elongated electrodes of impervious carbon and adapted to provide an anode in said system, said electrodes being threadedly secured about said connector and overlying said connector and said cable ends,

. said, electrodes being disposed With their inner ends in adjacency with each other and adapted to axially rejceive through the outer ends thereof the respective cable ends, and water sealing means between said inner electrode ends, whereby tensile forces through said' structure are borne by said cable ends and said connector.

References Cited in the file of thispatent UNITED STATES PATENTS

US2876190A 1955-04-18 1955-04-18 Duct anode Expired - Lifetime US2876190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2876190A US2876190A (en) 1955-04-18 1955-04-18 Duct anode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2876190A US2876190A (en) 1955-04-18 1955-04-18 Duct anode

Publications (1)

Publication Number Publication Date
US2876190A true US2876190A (en) 1959-03-03

Family

ID=23994984

Family Applications (1)

Application Number Title Priority Date Filing Date
US2876190A Expired - Lifetime US2876190A (en) 1955-04-18 1955-04-18 Duct anode

Country Status (1)

Country Link
US (1) US2876190A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926128A (en) * 1956-05-11 1960-02-23 Flower Archibald Thomas Anode connector for conductor wires
US3043765A (en) * 1958-02-27 1962-07-10 Duriron Co Anode for cathodic protection system
US3060259A (en) * 1960-08-29 1962-10-23 Flower Archibald Thomas Method and means for attaching an anode to a continuous conductor
US3071531A (en) * 1959-02-09 1963-01-01 Jr Harry W Hosford Cathodic protection system for submerged installations
US3134731A (en) * 1960-02-05 1964-05-26 Sarl Soc D Etudes Contre La Co Flexible anode device for use in the cathodic protection of metal structures
US3471395A (en) * 1966-12-12 1969-10-07 Duriron Co Anode for cathodic protection
US4279729A (en) * 1979-02-12 1981-07-21 Harco Corporation Anode and method of construction
US4519886A (en) * 1982-01-21 1985-05-28 Oronzio De Nora, S.A. Method of making electrical connection to an anode
US4526666A (en) * 1983-06-23 1985-07-02 Oronzio De Nora Method for electrically connecting non corrodible anodes to the corrodible core of a power supply cable
US5411646A (en) * 1993-05-03 1995-05-02 Corrpro Companies, Inc. Cathodic protection anode and systems
US5527440A (en) * 1992-10-15 1996-06-18 Nv Raychem Sa Repair of damaged electrode in impressed current corrosion protection system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1489743A (en) * 1921-03-29 1924-04-08 Delius George Electrolytic terminal
US1901088A (en) * 1930-10-06 1933-03-14 Wagner Electric Corp Method of making hose connections
US2022977A (en) * 1931-02-05 1935-12-03 Bell Telephone Labor Inc Joint in line wires
US2468785A (en) * 1944-02-07 1949-05-03 Allis Chalmers Mfg Co Screwed sleeve electrical connector
US2494425A (en) * 1943-03-15 1950-01-10 Hartford Nat Bank & Trust Co Electrolytically polished graphite anode
US2508171A (en) * 1948-08-19 1950-05-16 Westinghouse Electric Corp Electrode construction
US2638367A (en) * 1947-07-05 1953-05-12 Thomas & Betts Corp Case hardened cable connector and method
US2666027A (en) * 1949-01-13 1954-01-12 Corrosion Control Company Anode for cathodic protecting systems
US2777895A (en) * 1952-07-22 1957-01-15 Thomas & Betts Corp Dead end connectors

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1489743A (en) * 1921-03-29 1924-04-08 Delius George Electrolytic terminal
US1901088A (en) * 1930-10-06 1933-03-14 Wagner Electric Corp Method of making hose connections
US2022977A (en) * 1931-02-05 1935-12-03 Bell Telephone Labor Inc Joint in line wires
US2494425A (en) * 1943-03-15 1950-01-10 Hartford Nat Bank & Trust Co Electrolytically polished graphite anode
US2468785A (en) * 1944-02-07 1949-05-03 Allis Chalmers Mfg Co Screwed sleeve electrical connector
US2638367A (en) * 1947-07-05 1953-05-12 Thomas & Betts Corp Case hardened cable connector and method
US2508171A (en) * 1948-08-19 1950-05-16 Westinghouse Electric Corp Electrode construction
US2666027A (en) * 1949-01-13 1954-01-12 Corrosion Control Company Anode for cathodic protecting systems
US2777895A (en) * 1952-07-22 1957-01-15 Thomas & Betts Corp Dead end connectors

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2926128A (en) * 1956-05-11 1960-02-23 Flower Archibald Thomas Anode connector for conductor wires
US3043765A (en) * 1958-02-27 1962-07-10 Duriron Co Anode for cathodic protection system
US3071531A (en) * 1959-02-09 1963-01-01 Jr Harry W Hosford Cathodic protection system for submerged installations
US3134731A (en) * 1960-02-05 1964-05-26 Sarl Soc D Etudes Contre La Co Flexible anode device for use in the cathodic protection of metal structures
US3060259A (en) * 1960-08-29 1962-10-23 Flower Archibald Thomas Method and means for attaching an anode to a continuous conductor
US3471395A (en) * 1966-12-12 1969-10-07 Duriron Co Anode for cathodic protection
US4279729A (en) * 1979-02-12 1981-07-21 Harco Corporation Anode and method of construction
US4519886A (en) * 1982-01-21 1985-05-28 Oronzio De Nora, S.A. Method of making electrical connection to an anode
US4526666A (en) * 1983-06-23 1985-07-02 Oronzio De Nora Method for electrically connecting non corrodible anodes to the corrodible core of a power supply cable
US5527440A (en) * 1992-10-15 1996-06-18 Nv Raychem Sa Repair of damaged electrode in impressed current corrosion protection system
US5411646A (en) * 1993-05-03 1995-05-02 Corrpro Companies, Inc. Cathodic protection anode and systems

Similar Documents

Publication Publication Date Title
US3406373A (en) Coaxial connector assembly
US3404368A (en) Electrical connector of the plug or socket variety
US3475545A (en) Connector for metal-sheathed cable
US3243756A (en) Shielded electrical connection
US3194877A (en) Electrical connector for connecting an electrical lead to the braid of a braid-shielded electrical cable
US3955044A (en) Corrosion proof terminal for aluminum wire
US2549647A (en) Conductor and compressible insert connector means therefor
US2870420A (en) Electrical connector for coaxial cable
US4006288A (en) High voltage shielded cable termination, splice connection, and method of making a splice connection
US3787607A (en) Coaxial cable splice
US4210381A (en) Electrical connector contacts
US2761110A (en) Solderless coaxial connector
US2497820A (en) Cable clamp
US5168124A (en) Waterproof seal construction for wire harness
US3296363A (en) Crimped coaxial cable connection with knurled extension
US3660805A (en) Shielded cable connector and method of making the same
US7905755B1 (en) Electrical terminal connection with sealed core crimp
GB1268770A (en) Electrical connector
US3281524A (en) Insulated service splicer assembly
US3027536A (en) Insulation stripping wire connector
US3796821A (en) High voltage cable termination
US2087384A (en) Cable connecter
US3861777A (en) Separable electrical connector
US6148513A (en) Method of applying a connecting element to a high-frequency cable in a moisture-proof manner
US5329065A (en) Electrical cable