US3799861A - Electrical contact for equipment used in the electrolytical production of metals,particularly copper - Google Patents

Electrical contact for equipment used in the electrolytical production of metals,particularly copper Download PDF

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Publication number
US3799861A
US3799861A US00271985A US27198572A US3799861A US 3799861 A US3799861 A US 3799861A US 00271985 A US00271985 A US 00271985A US 27198572 A US27198572 A US 27198572A US 3799861 A US3799861 A US 3799861A
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US
United States
Prior art keywords
belt
electrical contact
contact
bar
bath
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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
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US00271985A
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English (en)
Inventor
Pietro B Di
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.)
RAPTES RES APPLIC AND TRADE ES
RAPTES RES APPLICATIONS AND TRADE ESTABLISHMENT FL
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RAPTES RES APPLIC AND TRADE ES
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/04—Wires; Strips; Foils

Definitions

  • ABSTRACT OF THE DISCLOSURE An electrical contact between moving and stationary conducting elements, in particular for equipment used in the electrolytical production of metals, such as copper in form of plates, which eliminates the wearing of the contact points, the voltage drops, the overheating of the movable contact and other inconveniences.
  • This contact essentially comprises a mercury bath contained within a number of beads of flexible and electro-insulating material, and the inside face of a metallic belt rotatably mounted around pulleys. In this bath is immersed a conducting bar spaced from said belt by means of pawls in anti-friction insulating material in order to prevent the direct contact between the bar and the rotating belt.
  • the present invention relates to an electrical contact for equipment used in the manufacture of metal tapes, such as copper, through the electrolytic process.
  • the sparkings and burnings produced by the creeping electrical contacts alter the composition of the alloy, in that they cause a precipitation of carbides in the zone subjected to the overheating.
  • This precipitation of carbides exposes the stainless steel to rapid chemical corrosion, which leads to the perforation of the belt in a short time, whereas in the meantime the electrolytically deposited material to remain attached to said zone, causing its own perforation and breakage at the instant the cathode support is removed.
  • Another object of the present invention is that of 3,799,861 Patented Mar. 26, 1974 eliminating the voltage drops in the contact zone between the moving elements and the fixed elements.
  • Still another important object of the present invention is that of avoiding overheating of the carrying belt.
  • A- -last butnot least object is that of obtaining a de crease in the current from the center of the belt toward the edges, in such a manner that uniform thicknesses of metal plate are obtained as desired.
  • FIG. 1 is a cross-sectional 'view of a device for obtaining electrolytic metal in plate form, provided with an electrical contact according to the invention
  • FIG. 2 is a cross-section along the line 11-11 of FIG. 1.
  • the electrical contact according to the invention is arranged within a metal belt 2 of steel, wound around pulleys 3, keyed onto shafts 4 which are rotatably mounted on fixed supports 5.
  • the lateral edges of said belt 2 are provided with rims of flexible insulating material 6. These rims are acid-resistant and are adapted to prevent the spreading of the electrolytic liquid 7 onto the internal face of said belt 2.
  • Said electrolytic liquid 7 is contained in a tank 8.
  • the electrical contact 1 consists of a conducting bar 9, immersed in a bath 10 of mercury, which is contained in a space confined by beads 11, of flexible and insulating material, which beads are in contact with the inside part of said belt 2.
  • the conducting bar 9 can be for example of copper plated with nickel or other metal, that mercury does not attack.
  • pawls '12' in anti-friction insulating material, of such nature (for example in plastic type Teflon) which is not attacked by mercury, said pawls having the function of spacers for said metallic conducting bar 9 and said belt 2 to prevent the possibility of local overheating and burning, in the event of direct contact.
  • Said beads 11 are extended over the entire internal perimeter of said belt 2, but for obvious reasons of gravity, the mercury bath 10 is limited to the bottom zone of the space defined by said beads 11 and the inside face of belt 2.
  • pieces of metal 13 for example copper, which are to be deposited electrolytically, in sheet or tape form 131: on the face of belt 2, which is immersed in bath 7.
  • the metallic bar 9 serves as cathode, while the function of insoluble anode is assumed by a conductor layer of lead 14, on which the pieces of copper 13 are placed. Said bar 9 and said conductor layer 14 are connected, through conductors 15, to a generator of electromotive force, not shown in the figure.
  • the operation of the electrical contact according to the invention is simple.
  • the mercury bath closes the 3 circuit comprising said electromotive-force generator, said conductors 15, bar 9, belt 2, electrolytic bath 7, the pieces of metal 13, and the lead conductor layer 14.
  • the mercury thanks to its high specific gravity as well as to its poor adhesive forces, does not follow the movement of the.
  • the electrical contact according to the invention eliminates 'the inconveniences encountered in the known types of electrical contacts of thecreeping type and similar between fixed and moving members.
  • all the phenomena of wear and tear of the contacts, voltage drops, overheating and burning of the steel support belt and the like, shown by the usual contacts do not appear.
  • the electrical contact employing mercury assures a distribution of electrical potential on the entire surface of belt 2 with a high degree of uniformity.
  • the metallic carrying bells it is preferable for the metallic carrying bells to be constructed of rolled steel (not annealed) with a high ultimate stress. This is for the purpose of having a high degree of elasticity, so that when the belt turns on the pulleys it will not retain the curved form of the pulley but will immediately straighten out upon leaving same.
  • the carrying belt shows those characteristics of hardness and elasticity that are found only in rolled steel in the non-annealed state.
  • This new type of contact thus permits to maintain unchanged these characteristics, which on the contrary, in case of other types of contact would be modified owing to the local overheatings causing the annealing of the steel.
  • the new contact according to the invention it is possible to operate with high currents, no longer being subjected to the limitations imposed by the creeping type of contact, operation of which gets worse as the current increases.
  • the materials used can be any that are desired in accordance with the requirements and, furthermore, all the described parts can be replaced with others that are technically equivalent.
  • the mercury can be substituted by a conducting substance of suitable analogous characteristics.
  • an electrical contact assembly comprising a stationary electrically conductive bar, an electrically conductive conveyor belt adapted to move relative to said bar, the belt being adapted to receive on a first surface thereof the electrolytic metal of which the metallic plate is formed, said bar being spaced from said belt, means for containing a mercury bath, said mercury bath in continuous contact with a second surface of said belt, at least a portion of said bar being immersed in said bath, said bar being adapted to be connected to an electromotive force generator.
  • An electrical contact assembly as defined in claim 1 including means for spacing said bar from said belt.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Electrolytic Production Of Metals (AREA)
US00271985A 1971-07-22 1972-07-14 Electrical contact for equipment used in the electrolytical production of metals,particularly copper Expired - Lifetime US3799861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT759271 1971-07-22

Publications (1)

Publication Number Publication Date
US3799861A true US3799861A (en) 1974-03-26

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Family Applications (1)

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US00271985A Expired - Lifetime US3799861A (en) 1971-07-22 1972-07-14 Electrical contact for equipment used in the electrolytical production of metals,particularly copper

Country Status (16)

Country Link
US (1) US3799861A (it)
JP (1) JPS5548436B2 (it)
AR (1) AR198626A1 (it)
AT (1) AT324013B (it)
AU (1) AU475999B2 (it)
BE (1) BE786475A (it)
BR (1) BR7204865D0 (it)
CA (1) CA967113A (it)
CH (1) CH557884A (it)
DE (1) DE2235178C2 (it)
FR (1) FR2146826A5 (it)
GB (1) GB1397139A (it)
LU (1) LU65759A1 (it)
NL (1) NL7209928A (it)
SE (1) SE383365B (it)
ZA (1) ZA724943B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176035A (en) * 1977-05-10 1979-11-27 Societe dite Coppertron S.A. Installation for the production of a copper foil intended to be applied to a dielectric substrate
US4385967A (en) * 1981-10-07 1983-05-31 Chemcut Corporation Electroplating apparatus and method
US4402799A (en) * 1981-10-02 1983-09-06 Chemcut Corporation Apparatus and method of treating tabs of printed circuit boards and the like
US4402800A (en) * 1981-10-02 1983-09-06 Ash James J Apparatus and method of treating tabs of printed circuit boards and the like
US5480528A (en) * 1994-02-25 1996-01-02 Xerox Corporation Brushless electrodeposition apparatus
CN105937048A (zh) * 2016-06-30 2016-09-14 广东保迪环保电镀设备有限公司 一种新型水银导电装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56135447A (en) * 1980-03-27 1981-10-22 Sumitomo Chem Co Ltd Optical resolving method of alpha-phenyl-beta- p-tolyl ethylamine
JPS56135446A (en) * 1980-03-27 1981-10-22 Sumitomo Chem Co Ltd Preparation of optically active l-alpha-phenyl-beta-(p-tolyl)ethylamine
JPS60252452A (ja) * 1985-04-26 1985-12-13 アメリカン　サイアナミツド　カンパニ− ｄ−２−アミノ−１−ブタノ−ルを単離する方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4176035A (en) * 1977-05-10 1979-11-27 Societe dite Coppertron S.A. Installation for the production of a copper foil intended to be applied to a dielectric substrate
US4402799A (en) * 1981-10-02 1983-09-06 Chemcut Corporation Apparatus and method of treating tabs of printed circuit boards and the like
US4402800A (en) * 1981-10-02 1983-09-06 Ash James J Apparatus and method of treating tabs of printed circuit boards and the like
US4385967A (en) * 1981-10-07 1983-05-31 Chemcut Corporation Electroplating apparatus and method
US5480528A (en) * 1994-02-25 1996-01-02 Xerox Corporation Brushless electrodeposition apparatus
CN105937048A (zh) * 2016-06-30 2016-09-14 广东保迪环保电镀设备有限公司 一种新型水银导电装置
CN105937048B (zh) * 2016-06-30 2018-07-24 广东保迪环保电镀设备有限公司 一种水银导电装置

Also Published As

Publication number Publication date
GB1397139A (en) 1975-06-11
CH557884A (it) 1975-01-15
FR2146826A5 (it) 1973-03-02
ZA724943B (en) 1973-04-25
LU65759A1 (it) 1972-11-28
BR7204865D0 (pt) 1973-05-10
JPS4834736A (it) 1973-05-22
AU475999B2 (en) 1976-09-09
JPS5548436B2 (it) 1980-12-05
AU4485972A (en) 1974-01-24
CA967113A (en) 1975-05-06
SE383365B (sv) 1976-03-08
DE2235178A1 (de) 1973-02-22
AT324013B (de) 1975-08-11
DE2235178C2 (de) 1984-06-14
AR198626A1 (es) 1974-07-15
NL7209928A (it) 1973-01-24
BE786475A (fr) 1972-11-16

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