US1959668A - Alloys - Google Patents
Alloys Download PDFInfo
- Publication number
- US1959668A US1959668A US621751A US62175132A US1959668A US 1959668 A US1959668 A US 1959668A US 621751 A US621751 A US 621751A US 62175132 A US62175132 A US 62175132A US 1959668 A US1959668 A US 1959668A
- Authority
- US
- United States
- Prior art keywords
- indium
- alloy
- amalgamating
- alloys
- mercury
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C7/00—Alloys based on mercury
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
- A61K6/847—Amalgams
Definitions
- the present invention relates to alloys and more particularly though not exclusively to dental alloys.
- An object of the invention is to provide a mercury composition or amalgam which retains the liquid property of mercury, said amalgam being combined with an amalgamating alloy, as needed, -for dental fillings, the filling material having great ultimate compressive strength, freedom irom'objectionable setting changes, and freedom from objectionable now under pressure, said filling material complying with other dental requirements, such as susceptibility to carving for a limited time after being prepared, absence of granular or sandy consistency, susceptibility to receiving and retaining a polish and having exceptional resistance to tarnishing.
- a further object of the invention is to provide an amalgamating alloy needed, with mercury, thereby forming a filling material complying with the dental requirements and having the advantages above stated.
- a still further object of the invention is to provide alloys such as the foregoing and having-the 2 5 advantages stated, with, in addition, a relatively great resistance to tarnishing efiects.
- a mercury composition suitable tor use with dental fillings may comprise mercury and indium in varying proportions within the limit of liquidity of the composition. While indium may be present in an amount up to 50% by weight when compounded with mercury alone, the desired-results for dental work can be accomplished by using a considerably less amount of indium. For example, very satisfactory results are obtained wlth'a'composition consisting of indium 5% and mercury 95% by weight.
- the amalgamating alloy to be compounded 40 with the indium amalgam may vary as to composition and relative amounts of ingredients. Where the indium has already been compounded with the mercury, the amalgamating alloy may or may not also contain indium. Such alloy may, i
- the amalgamating alloy may contain indium in an amount, for example, up to 25% by weight although a smaller amount oi. indium may be present'and still accomplish the desired results of the present invention. For example, good results are obtained where the amalgamating alloy contains 10% by weight of indium; excellent results are likewise obtained where the amalgamating alloy contains 20% by weight of indium. n
- the indium present for dental work should not be present in an amount equal to as much as 40% in weight of the amalgamating alloy.
- the indium is preferably combined with one of the other metals to be used, such for example as gold, by being melted therewith in a reducing atmosphere, for example in a hydrogen atmosphere, thereby avoiding the conversion of the indium, or a portion of the indium, into indium oxide.
- a reducing atmosphere for example in a hydrogen atmosphere
- An enriching alloy may, however, be made in this manner and consist, for example, of gold and indium in any desired proportions, and other indium containing alloys may be made by adding the enriching alloy to'other metals under a non-oxidizing flux, for example, in an ordinary gas furnace, the hydrogen atmosphere in this case being unnecessary.
- a dental amalgam comprising 5% by weight of indium and 95% by weight of mercury.
- a dentalamalgam consistingv or less than and more than 1% of indium, the remainder consisting principally of mercury.
Description
amalgamating alloys for atented May 22, 1934 ALLOYS Daniel Gray,
Community, ration of New York No Drawing.
2 Claims.
The present invention relates to alloys and more particularly though not exclusively to dental alloys.
An object of the invention is to provide a mercury composition or amalgam which retains the liquid property of mercury, said amalgam being combined with an amalgamating alloy, as needed, -for dental fillings, the filling material having great ultimate compressive strength, freedom irom'objectionable setting changes, and freedom from objectionable now under pressure, said filling material complying with other dental requirements, such as susceptibility to carving for a limited time after being prepared, absence of granular or sandy consistency, susceptibility to receiving and retaining a polish and having exceptional resistance to tarnishing.
A further object of the invention is to provide an amalgamating alloy needed, with mercury, thereby forming a filling material complying with the dental requirements and having the advantages above stated. I
A still further object of the invention is to provide alloys such as the foregoing and having-the 2 5 advantages stated, with, in addition, a relatively great resistance to tarnishing efiects.
A mercury composition suitable tor use with dental fillings, in accordance with the present invention, may comprise mercury and indium in varying proportions within the limit of liquidity of the composition. While indium may be present in an amount up to 50% by weight when compounded with mercury alone, the desired-results for dental work can be accomplished by using a considerably less amount of indium. For example, very satisfactory results are obtained wlth'a'composition consisting of indium 5% and mercury 95% by weight. The amalgamating alloy to be compounded 40 with the indium amalgam may vary as to composition and relative amounts of ingredients. Where the indium has already been compounded with the mercury, the amalgamating alloy may or may not also contain indium. Such alloy may, i
for example, be composed of silver, tin and rela- Sherrlll, N. 1., aslig'nor to Limited, Oneida, N. Y., a corpofor compounding, as
Oneida Application July 9, 1932. erial No. 621,751
tively small amounts of zinc and copper, or may be any other standard amalgamating alloy.
011 the other hand, and also in accordance with the present invention, the amalgamating alloy may contain indium in an amount, for example, up to 25% by weight although a smaller amount oi. indium may be present'and still accomplish the desired results of the present invention. For example, good results are obtained where the amalgamating alloy contains 10% by weight of indium; excellent results are likewise obtained where the amalgamating alloy contains 20% by weight of indium. n
It will be evident that where an indium amalgam is employed, a relatively smaller amount ofindium in the amalgamating alloy is required.
While the amount of indium in the amalgamating alloy may'vary, the indium present for dental work should not be present in an amount equal to as much as 40% in weight of the amalgamating alloy.
In the preparation of alloys above referred to and containing indium, the indium is preferably combined with one of the other metals to be used, such for example as gold, by being melted therewith in a reducing atmosphere, for example in a hydrogen atmosphere, thereby avoiding the conversion of the indium, or a portion of the indium, into indium oxide.
An enriching alloy may, however, be made in this manner and consist, for example, of gold and indium in any desired proportions, and other indium containing alloys may be made by adding the enriching alloy to'other metals under a non-oxidizing flux, for example, in an ordinary gas furnace, the hydrogen atmosphere in this case being unnecessary. I I What is claimed is:-
l. A dental amalgam comprising 5% by weight of indium and 95% by weight of mercury.
2. A dentalamalgam consistingv or less than and more than 1% of indium, the remainder consisting principally of mercury.
DANIEL GRAY,
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US621751A US1959668A (en) | 1932-07-09 | 1932-07-09 | Alloys |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US621751A US1959668A (en) | 1932-07-09 | 1932-07-09 | Alloys |
Publications (1)
Publication Number | Publication Date |
---|---|
US1959668A true US1959668A (en) | 1934-05-22 |
Family
ID=24491480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US621751A Expired - Lifetime US1959668A (en) | 1932-07-09 | 1932-07-09 | Alloys |
Country Status (1)
Country | Link |
---|---|
US (1) | US1959668A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2767085A (en) * | 1955-07-01 | 1956-10-16 | Rca Corp | Indium-gold amalgams |
US3087811A (en) * | 1960-11-03 | 1963-04-30 | Vapor Corp | Alloys of mercury |
US3165403A (en) * | 1962-03-27 | 1965-01-12 | Gen Electric | Superconductive materials |
US3187423A (en) * | 1962-01-04 | 1965-06-08 | Lloyd C Lantz | Method of releasing solid solder from a joint |
US4164419A (en) * | 1975-12-22 | 1979-08-14 | Shofu Dental Manufacturing Company, Limited | Powdered alloy for dental amalgam |
US4966142A (en) * | 1989-06-30 | 1990-10-30 | Trustees Of Boston University | Method for electrically joining superconductors to themselves, to normal conductors, and to semi-conductors |
US5131582A (en) * | 1989-06-30 | 1992-07-21 | Trustees Of Boston University | Adhesive metallic alloys and methods of their use |
-
1932
- 1932-07-09 US US621751A patent/US1959668A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2767085A (en) * | 1955-07-01 | 1956-10-16 | Rca Corp | Indium-gold amalgams |
US3087811A (en) * | 1960-11-03 | 1963-04-30 | Vapor Corp | Alloys of mercury |
US3187423A (en) * | 1962-01-04 | 1965-06-08 | Lloyd C Lantz | Method of releasing solid solder from a joint |
US3165403A (en) * | 1962-03-27 | 1965-01-12 | Gen Electric | Superconductive materials |
US4164419A (en) * | 1975-12-22 | 1979-08-14 | Shofu Dental Manufacturing Company, Limited | Powdered alloy for dental amalgam |
US4966142A (en) * | 1989-06-30 | 1990-10-30 | Trustees Of Boston University | Method for electrically joining superconductors to themselves, to normal conductors, and to semi-conductors |
DE4020884A1 (en) * | 1989-06-30 | 1991-01-03 | Univ Boston | METHOD AND ALLOY FOR ELECTRICALLY CONNECTING SUPERCONDUCTIVE MATERIALS |
US5131582A (en) * | 1989-06-30 | 1992-07-21 | Trustees Of Boston University | Adhesive metallic alloys and methods of their use |
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