US2734823A - Sterling silver alloy - Google Patents
Sterling silver alloy Download PDFInfo
- Publication number
- US2734823A US2734823A US2734823DA US2734823A US 2734823 A US2734823 A US 2734823A US 2734823D A US2734823D A US 2734823DA US 2734823 A US2734823 A US 2734823A
- Authority
- US
- United States
- Prior art keywords
- silver
- alloy
- sterling silver
- sterling
- zinc
- 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
Links
- 229910000898 sterling silver Inorganic materials 0.000 title claims description 44
- 239000010934 sterling silver Substances 0.000 title claims description 44
- 229910045601 alloy Inorganic materials 0.000 title description 54
- 239000000956 alloy Substances 0.000 title description 54
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 title description 50
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 40
- 229910052759 nickel Inorganic materials 0.000 claims description 20
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 20
- 229910052725 zinc Inorganic materials 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 20
- 239000010946 fine silver Substances 0.000 claims description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 22
- 229910052709 silver Inorganic materials 0.000 description 22
- 239000004332 silver Substances 0.000 description 22
- 229910052802 copper Inorganic materials 0.000 description 18
- 239000010949 copper Substances 0.000 description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 18
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 16
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
- 229910052697 platinum Inorganic materials 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052763 palladium Inorganic materials 0.000 description 6
- 238000005494 tarnishing Methods 0.000 description 6
- 239000000448 dental amalgam Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006011 modification reaction Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910001312 Amalgam (dentistry) Inorganic materials 0.000 description 2
- 241000282887 Suidae Species 0.000 description 2
- 230000002708 enhancing Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3006—Ag as the principal constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
Definitions
- This invention relates to an alloy and refers more particularly to an alloy capable of use as sterling silver.
- One object of the present invention is the production of a sterling silver which is non-tarnishing and non-corrodible for all practical purposes.
- a further object of the present invention is the provision of a pre-alloy which can be conveniently combined with silver to produce sterling silver which is completely non-tarnishing and non-corrodible.
- a still further object of the present invention is the provision of non-tarnishing and non-corrodible sterling silver which can be conveniently adapted for the manufacture of silverware, hollowware, ornamental jewelry, dental amalgam and silver solder, and/ or any place where sterling silver in any form is used.
- the objects of this invention may be realized through the provision of a pre-alloy comprising from 5% to nickel, from 20% to 40% copper and from 50% to 75% zinc.
- a minimum of 50% zinc may be alloyed with 40% maximum copper and 10% maximum nickel to produce 100% of the pre-alloy.
- a maximum of 75% zinc is alloyable with 20% minimum copper and 5% minimum nickel to produce 100% of the prealloy. It should be understood, however, that while the maxima and minima have been found by repeated tests to be critical for the purposes of this invention, the range within these figures is empirically determined.
- terling silver is formed by adding 7.3% of the described pre-alloy to 92.7% of pure silver.
- the percentage of the alloy and the pure silver may vary within certain limits although it should be noted that sterling silver requires at least 92.7% of pure silver.
- the described pre-alloy added to fine silver in varying amounts of alloy to fine silver producing grades alloyed silver may be used for solders, dental amalgams, electrical contacts, and/or in any place where silver in any degree less than sterling is used.
- 5% nickel, 25% copper and 70% zinc are mixed together with a suitable flux and when fusion takes place, the molten metal is run into pigs or shots ready for use in the manufacture of sterling silver.
- the finished product capable of use as sterling silver, is 92.7% silver and 7.3% of the pre-alloy.
- Ordinary sterling silver has a bluish sheen rather than a dead white appearance and platinum may be added to the alloy to vary the color of the sterling silver in order to approach the dead white appearance.
- the pre-alloy of this invention makes unnecessary the use of platinum since it produces a substantially white sterling silver when combined with 92.7% of fine silver.
- the pre-alloy may be formed in the following proportions: 10% nickel, 25% copper, 64% zinc and 1% platinum.
- Sterling silver consists of 7.3% of this prealloy and 92.7% pure silver.
- the pre-alloy of this invention has been found to give pure silver proper ductility.
- a certain amount of palladium may be added to the pre-alloy to enhance the ductility of the sterling silver.
- the alloy may be formed in the following proportions: 5% nickel, 25 copper, 69% zinc and 1% palladium.
- Sterling silver consists of 92.7 pure silver and 7.3% of the alloy.
Description
United States Patent STERLING SILVER ALLOY Jacob S. Shelf, Flushing, N. Y.
No Drawing. Application July 9, 1951, Serial No. 235,911
3 Claims. (Cl. 75-173) This invention relates to an alloy and refers more particularly to an alloy capable of use as sterling silver.
One object of the present invention is the production of a sterling silver which is non-tarnishing and non-corrodible for all practical purposes.
A further object of the present invention is the provision of a pre-alloy which can be conveniently combined with silver to produce sterling silver which is completely non-tarnishing and non-corrodible.
A still further object of the present invention is the provision of non-tarnishing and non-corrodible sterling silver which can be conveniently adapted for the manufacture of silverware, hollowware, ornamental jewelry, dental amalgam and silver solder, and/ or any place where sterling silver in any form is used.
The above and other objects of the instant invention will become apparent in the course of the following specification.
This application for patent is a continuation of earlier application Serial Number 130,859, filed December 2, 1949, now abandoned.
The objects of this invention may be realized through the provision of a pre-alloy comprising from 5% to nickel, from 20% to 40% copper and from 50% to 75% zinc. Thus, a minimum of 50% zinc may be alloyed with 40% maximum copper and 10% maximum nickel to produce 100% of the pre-alloy. Whereas, a maximum of 75% zinc is alloyable with 20% minimum copper and 5% minimum nickel to produce 100% of the prealloy. It should be understood, however, that while the maxima and minima have been found by repeated tests to be critical for the purposes of this invention, the range within these figures is empirically determined.
terling silver is formed by adding 7.3% of the described pre-alloy to 92.7% of pure silver. The percentage of the alloy and the pure silver may vary within certain limits although it should be noted that sterling silver requires at least 92.7% of pure silver.
The described pre-alloy added to fine silver in varying amounts of alloy to fine silver producing grades alloyed silver, may be used for solders, dental amalgams, electrical contacts, and/or in any place where silver in any degree less than sterling is used.
In accordance with one preferred example, 5% nickel, 25% copper and 70% zinc are mixed together with a suitable flux and when fusion takes place, the molten metal is run into pigs or shots ready for use in the manufacture of sterling silver.
The finished product, capable of use as sterling silver, is 92.7% silver and 7.3% of the pre-alloy.
It was found that the alloy consisting of the above stated range of metals is entirely non-tarnishable and will resist oxidation to a remarkable extent. This applicant wrapped pieces of sterling silver composed of different alloys including his own and others of different percentages, in rubber sheeting and laid them away for months. When the pieces were unwrapped from the rubber, all the samples were black except the alloy prepared in accordance with the present invention. This alloy was still White and untarnished.
Ordinary sterling silver has a bluish sheen rather than a dead white appearance and platinum may be added to the alloy to vary the color of the sterling silver in order to approach the dead white appearance. The pre-alloy of this invention makes unnecessary the use of platinum since it produces a substantially white sterling silver when combined with 92.7% of fine silver. However, where it is desired to accentuate the whiteness of the sterling silver, the pre-alloy may be formed in the following proportions: 10% nickel, 25% copper, 64% zinc and 1% platinum. Sterling silver consists of 7.3% of this prealloy and 92.7% pure silver.
Similarly, the pre-alloy of this invention has been found to give pure silver proper ductility. However, a certain amount of palladium may be added to the pre-alloy to enhance the ductility of the sterling silver. In this event, the alloy may be formed in the following proportions: 5% nickel, 25 copper, 69% zinc and 1% palladium. Sterling silver consists of 92.7 pure silver and 7.3% of the alloy.
It is apparent that the examples set forth above have been given solely by way of illustration and not of limitations and that they are subject to certain variations and modifications without departing from the scope or intent of the present invention so long as they remain within the ranges set forth in the specification. All such variations and modifications are to be included within the scope of the instant invention.
What is claimed is:
1. Sterling silver consisting of 92.7% of fine silver and 7.3 of an alloy consisting of 5% nickel, 25% copper and 70% zinc.
2. Sterling silver consisting of 92.7% of fine silver and .3% of an alloy consisting of 5% nickel, 25 copper, 69% zinc and 1% platinum.
3. Sterling silver consisting of 92.7% of fine silver and 7.3% of an alloy consisting of 5% nickel, 25 copper, 69% zinc and 1% palladium.
References Cited in the file of this patent UNITED STATES PATENTS 338,317 Thowless Mar. 23, 1886 1,321,170 Weiger Nov. 11, 1919 1,612,782 Vogt et al. Dec. 28, 1926 1,651,662 Balke Dec. 6, 1927 1,934,730 Murray et al. Nov. 14, 1933 2,006,598 Muller et al. July 2, 1935 2,058,857 Emmett Oct. 27, 1936 2,187,377 Hensel Jan. 16, 1940 FOREIGN PATENTS 7,195 Great Britain Mar. 26, 1906 110,799 Japan 1936 492,779 Germany Mar. 5, 1930 414,212 Great Britain Aug. 2, 1934 798,964 France Mar. 14, 1936 839,610 France Jan. 4, 1939 OTHER REFERENCES Campbell's List of Alloys, pub. by the Amer. Society for Testing Metals (1930), page 27 relied on.
Claims (1)
1. STERLING SILVER CONSISTING OF 92.7% OF FINE SILVER AND 7.3% OF AN ALLOY CONSISTING OF 5% NICKEL, 25% COPPER AND 70% ZINC.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2734823A true US2734823A (en) | 1956-02-14 |
Family
ID=3444292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US2734823D Expired - Lifetime US2734823A (en) | Sterling silver alloy |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2734823A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3141761A (en) * | 1962-02-23 | 1964-07-21 | Walter U Schmitt G M B H Fa Dr | Pulverized silver alloys for use in producing dental amalgams |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US338317A (en) * | 1886-03-23 | Alloy | ||
| GB190607195A (en) * | 1906-03-26 | 1907-03-26 | John Howard William Rolason | Improvements in Silver Alloys. |
| US1321170A (en) * | 1919-11-11 | Joseph anthony weigffir | ||
| US1612782A (en) * | 1923-12-19 | 1926-12-28 | Lee S Smith & Son Mfg Company | Dental alloy and process of making the same |
| US1651662A (en) * | 1926-11-24 | 1927-12-06 | Fansteel Prod Co Inc | Tungsten welding |
| DE492779C (en) * | 1927-07-30 | 1930-03-05 | Ver Fuer Die Probier Und Forsc | Difficult to tarnish, noble silver alloy |
| US1934730A (en) * | 1930-07-22 | 1933-11-14 | Oneida Community Ltd | Intimate mixture or alloy |
| GB414212A (en) * | 1932-07-08 | 1934-08-02 | Oesterreichische Dynamit Nobel | Corrosion-resistant and malleable alloys |
| US2006598A (en) * | 1932-07-08 | 1935-07-02 | Oesterreichische Dynamit Nobel | Corrosion-resistant and malleable alloy |
| FR798964A (en) * | 1934-12-11 | 1936-05-29 | Welding improvements | |
| US2058857A (en) * | 1936-06-30 | 1936-10-27 | Mallory & Co Inc P R | Silver base alloy |
| FR839610A (en) * | 1938-06-22 | 1939-04-07 | Bijouterie Joaillerie Michel S | New silver alloy |
| US2187377A (en) * | 1937-09-25 | 1940-01-16 | Mallory & Co Inc P R | Wear resistant electric contact |
-
0
- US US2734823D patent/US2734823A/en not_active Expired - Lifetime
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US338317A (en) * | 1886-03-23 | Alloy | ||
| US1321170A (en) * | 1919-11-11 | Joseph anthony weigffir | ||
| GB190607195A (en) * | 1906-03-26 | 1907-03-26 | John Howard William Rolason | Improvements in Silver Alloys. |
| US1612782A (en) * | 1923-12-19 | 1926-12-28 | Lee S Smith & Son Mfg Company | Dental alloy and process of making the same |
| US1651662A (en) * | 1926-11-24 | 1927-12-06 | Fansteel Prod Co Inc | Tungsten welding |
| DE492779C (en) * | 1927-07-30 | 1930-03-05 | Ver Fuer Die Probier Und Forsc | Difficult to tarnish, noble silver alloy |
| US1934730A (en) * | 1930-07-22 | 1933-11-14 | Oneida Community Ltd | Intimate mixture or alloy |
| GB414212A (en) * | 1932-07-08 | 1934-08-02 | Oesterreichische Dynamit Nobel | Corrosion-resistant and malleable alloys |
| US2006598A (en) * | 1932-07-08 | 1935-07-02 | Oesterreichische Dynamit Nobel | Corrosion-resistant and malleable alloy |
| FR798964A (en) * | 1934-12-11 | 1936-05-29 | Welding improvements | |
| US2058857A (en) * | 1936-06-30 | 1936-10-27 | Mallory & Co Inc P R | Silver base alloy |
| US2187377A (en) * | 1937-09-25 | 1940-01-16 | Mallory & Co Inc P R | Wear resistant electric contact |
| FR839610A (en) * | 1938-06-22 | 1939-04-07 | Bijouterie Joaillerie Michel S | New silver alloy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3141761A (en) * | 1962-02-23 | 1964-07-21 | Walter U Schmitt G M B H Fa Dr | Pulverized silver alloys for use in producing dental amalgams |
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