US3753669A - Coinage materials - Google Patents

Coinage materials Download PDF

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Publication number
US3753669A
US3753669A US00210656A US3753669DA US3753669A US 3753669 A US3753669 A US 3753669A US 00210656 A US00210656 A US 00210656A US 3753669D A US3753669D A US 3753669DA US 3753669 A US3753669 A US 3753669A
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US
United States
Prior art keywords
percent
composite material
nickel
coin
coins
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
US00210656A
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English (en)
Inventor
R Churchill
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Texas Instruments Inc
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Texas Instruments Inc
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Filing date
Publication date
Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
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Publication of US3753669A publication Critical patent/US3753669A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/925—Relative dimension specified
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12882—Cu-base component alternative to Ag-, Au-, or Ni-base component
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12896—Ag-base component

Definitions

  • 29/199 mmmefic materials made fmm [51] Int Cl i323! 3/00 1323p 3/06 nates, comprise outer cladding layers of coin silver or [58] Field of Search 29/199 194 metallurgical bnded Sides a core layer of nickel silver to provide substantially uni- [56] References Cited form color along the edges of the laminates and coins and to provide the coins with properties useful in coin- UNITED STATES PATENTS age disfliminatiom 3,367,773 2/1968 Turillon et al. 75/170 Trupp 61 a1.
  • FIG. 1 is a perspective view of a metal laminate material provided by this invention.
  • FIG. 2 is a perspective view of a coin made from the material illustrated in FIG. 1.
  • 10 in FIG. I indicates a preferred embodiment of the novel and improved composite metal laminate material of this invention which is shown to include a metal core layer 12 of nickel silver material having a metal cladding layer 14 of cupronickel material on either side of the core layer, the' cladding layers being metallurgically bonded to the core layer substantially throughout the interfaces 16 between the cladding and core layers.
  • the claddings 14 are metallurgically bonded to the core layer by any conventional roll-bonding techniques or the like, the noted layer materials being well-suited for such bonding as will be understood.
  • 18 in FIG. 2 illustrates a conventional coin or coin blank cut from the'laminate material 10.
  • the core layer 12 of the laminate material 10 and of the coin 18 are preferably formed of a nickel silver material having a nominal composition, by weight, of 66 percent copper, 24 percent zinc, and 10 percent nickel, the core layer having a thickness comprising from about 80 to 98 percent of the total thickness of the composite material.
  • the core layer has a thickness comprising about 90 percent of the total composite material thickness. How ever, other nickel silver materials are also used in the core layer 14 within the scope of this invention.
  • the core layer is alternately formed of a nickel silver alloy having a nominal composition, by weight, of 65 percent copper, 18 percent zinc, and 17 percent nickel; of a nickel silver alloy having a nominal composition, by weight, of 65 percent,;copper, 23 percent zinc, and 12 percent nickel; or of a nickel silver alloy having a nominal composition, by weight, of 55 percent copper, 27 percent zinc, and 18 percent nickel. All of these nickel silver alloys are of white color, are readily available from commercial sources, and, because of their substantial zinc contents and relatively low nickel contents, are available at relatively low costs.
  • the cladding layers 14 of the laminate material 10 and of the coin 18 are preferably formed of cupronickel, the alloy customarily used in coinage materials which has a nominal composition, by weight, of percent copper and 25 percent nickel being preferred.
  • cupronickel alloys such as the common alloy having a nominal composition, by weight, of 70 percent copper and 30 percent nickel, are also used within the scope of this invention.
  • the cladding layers l4of the laminate l0 and of the coin 18 are also formed of coin silver embodying at least about percent, by weight, of silverand the balance copper. All of these cladding materials also display a white color and are readily available from commercial sources.
  • the cladding layers 14 are each of a thickness in the range from about i to 10 percent. of the total thickness of the composite material within the scope of this invention.
  • each cladding layer has a thickness comprising about 5 percent of the total thickness of the composite material.
  • the outer surfaces of the coins are also hard and are readily mintable to provide a sharp wear-resistant imprint on the coin surfaces, and the core and cladding materials both display sufficient strength so that the coins do not become easily bent during use.
  • the core materials are galvanically a little more anodic (less noble) than thecladding materials described aboveso that any slight material corrosiomwhich mayoccur in the coins during use will occur preferentially at the edge of the core, whereby any minor dulling of the composite resulting from such slight corrosion is confined to the edge of the coins where the dulling is not apparent and permits the broad surfaces of the coins to retain their brightness during use.
  • Both the cladding and core materials have sufficient density to provide the coins with enough heft to be attractive in the coin, and both core and cladding materials are adapted to provide a pleasing coinage ring.
  • the noted laminate materials and coins are nonmagnetic permitting the coins to be used in vending machines in widespread use which are customarily adapted to reject magnetic materials such as steel slugs. Further, the noted coins are adapted to display desirable resistivitydensity properties which permit the coins to be discriminated from coins of other common coinage materials in the eddy current discriminators used to a wide extent in coinoperated vending machines.
  • the coin displays a resistivity-density factor of about 185 microohm-grams per square centimeter which permits ready discrimination of the coin from solid cupronickel coins (usually about 210 microohmgrams per square centimeter) and from many other coinage materials in use which display resistivitydensity factors below about 150 microohm-grams per square centimeter.
  • the laminate and coin materials of this invention are also adapted to permit ready recovery of the composite metal scrap material which is generated in striking blanks for the coins from composite metal strip material of this invention. That is, where the laminate and coin materials have cupronickel claddings and nickel silver cores, the scrap material is recoverable merely by melting the scrap with addition of zinc to reproduce a nickel silver alloy. Alternately, where a coin silver cladding is used, the silver material is readily separable from the scrap materials by conventional techinques leaving the remaining materials to be processed for reproducing nickel silver materials.
  • a composite metal laminate material useful in making coins comprising a core layer of nickel silver having a cladding layer of metallurgically bonded to opposite sides of said core layer, said cladding layers embodying a metal selected from the group consisting of cupronickel alloys and coin silver alloys.
  • said cladding layers embody a white metal selected from the group consisting of a cuprocnickel alloy having a nominal composition, by weight, of 75 percent copper and 25 percent nickel, a cupronickel alloy having a nominal composition, by weight, of 70 percent copper and 30 percent nickel, and a coin silver alloy having a nominal composition, by weight, of at least 80 percent silver and the balance copper.
  • a composite metal laminate material useful in making coins comprising a core layer of nickel silver alloy having a nominal composition, by weight, of 66 percent copper, 24 percent zinc, and 10 percent nickel, and a cladding layer of cupronickel alloy metallurgically bonded to opposite sides of said core layer, said cupronickel alloy having a nominal composition, by weight, of percent copper and 25 percent nickel, each of said cladding layers having a thickness comprising about 5 percent of the total thickness of the composite material.

Landscapes

  • Laminated Bodies (AREA)
  • Adornments (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Testing Of Coins (AREA)
US00210656A 1971-12-22 1971-12-22 Coinage materials Expired - Lifetime US3753669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21065671A 1971-12-22 1971-12-22

Publications (1)

Publication Number Publication Date
US3753669A true US3753669A (en) 1973-08-21

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ID=22783739

Family Applications (1)

Application Number Title Priority Date Filing Date
US00210656A Expired - Lifetime US3753669A (en) 1971-12-22 1971-12-22 Coinage materials

Country Status (7)

Country Link
US (1) US3753669A (de)
DE (1) DE2259519A1 (de)
FR (1) FR2164783B1 (de)
GB (1) GB1384438A (de)
IT (1) IT973756B (de)
NO (1) NO131943C (de)
SE (1) SE374509B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330599A (en) * 1980-06-09 1982-05-18 Olin Corporation Composite material
US4362262A (en) * 1980-06-09 1982-12-07 Olin Corporation Method of forming a composite material
US4500028A (en) * 1982-06-28 1985-02-19 Olin Corporation Method of forming a composite material having improved bond strength
DE4432093A1 (de) * 1994-09-09 1996-03-21 Krupp Vdm Gmbh Automatensicherer Werkstoffverbund für Münzen und Medaillen
WO2002055753A1 (en) * 2000-12-20 2002-07-18 Outokumpu Oyj A method for the manufacture of layered metal product slabs and layered metal product slabs
US20040035165A1 (en) * 2000-12-20 2004-02-26 Matti Leiponen Method and apparatus for manufacturing tubes by rolling
CN1325678C (zh) * 2005-03-15 2007-07-11 王胜军 一种复合零磁性质金属材料及其制造工艺
EP2143829A2 (de) 2008-06-13 2010-01-13 Monnaie Royale Canadienne/Royal Kontrolle elektromagnetischer Signale von Münzen mittels Mehrschichtenversilberungstechnologie
US20140345173A1 (en) * 2012-01-17 2014-11-27 Wickeder Westfalenstahl Gmbh Coin and method for producing a coin

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4243855C2 (de) * 1992-12-23 1996-05-09 Krupp Vdm Gmbh Münzrohling, der im wesentlichen aus Kupfer und Nickel besteht

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367773A (en) * 1965-05-03 1968-02-06 Int Nickel Co Nickel-silicon alloy product
US3407050A (en) * 1965-05-04 1968-10-22 Trapp Gloria Worthington Duplex nickel material
US3419364A (en) * 1965-06-24 1968-12-31 Olin Mathieson Composite silver and copper article
US3475811A (en) * 1966-12-29 1969-11-04 Texas Instruments Inc Clad metal
US3634890A (en) * 1967-05-20 1972-01-18 Ver Deutsche Metallwerke Ag Metal coins which can be distinguished and separated from one another by physical methods responding to magnetic properties

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3367773A (en) * 1965-05-03 1968-02-06 Int Nickel Co Nickel-silicon alloy product
US3407050A (en) * 1965-05-04 1968-10-22 Trapp Gloria Worthington Duplex nickel material
US3419364A (en) * 1965-06-24 1968-12-31 Olin Mathieson Composite silver and copper article
US3475811A (en) * 1966-12-29 1969-11-04 Texas Instruments Inc Clad metal
US3634890A (en) * 1967-05-20 1972-01-18 Ver Deutsche Metallwerke Ag Metal coins which can be distinguished and separated from one another by physical methods responding to magnetic properties

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330599A (en) * 1980-06-09 1982-05-18 Olin Corporation Composite material
US4362262A (en) * 1980-06-09 1982-12-07 Olin Corporation Method of forming a composite material
US4500028A (en) * 1982-06-28 1985-02-19 Olin Corporation Method of forming a composite material having improved bond strength
DE4432093A1 (de) * 1994-09-09 1996-03-21 Krupp Vdm Gmbh Automatensicherer Werkstoffverbund für Münzen und Medaillen
WO2002055753A1 (en) * 2000-12-20 2002-07-18 Outokumpu Oyj A method for the manufacture of layered metal product slabs and layered metal product slabs
US20040035165A1 (en) * 2000-12-20 2004-02-26 Matti Leiponen Method and apparatus for manufacturing tubes by rolling
US7024750B2 (en) 2000-12-20 2006-04-11 Outokumpu Oyj Method for the manufacture of layered metal product slabs and layered metal product slabs
CN1325678C (zh) * 2005-03-15 2007-07-11 王胜军 一种复合零磁性质金属材料及其制造工艺
EP2143829A2 (de) 2008-06-13 2010-01-13 Monnaie Royale Canadienne/Royal Kontrolle elektromagnetischer Signale von Münzen mittels Mehrschichtenversilberungstechnologie
US9447515B2 (en) 2008-06-13 2016-09-20 Royal Canadian Mint Control of electromagnetic signals of coins through multi-ply plating technology
US20140345173A1 (en) * 2012-01-17 2014-11-27 Wickeder Westfalenstahl Gmbh Coin and method for producing a coin
US9241548B2 (en) * 2012-01-17 2016-01-26 Wickeder Westfalenstahl Gmbh Coin and method for producing a coin

Also Published As

Publication number Publication date
IT973756B (it) 1974-06-10
NO131943C (de) 1975-08-27
NO131943B (de) 1975-05-20
SE374509B (de) 1975-03-10
FR2164783A1 (de) 1973-08-03
FR2164783B1 (de) 1976-08-27
GB1384438A (en) 1975-02-19
DE2259519A1 (de) 1973-06-28

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