US1810499A - Transformer winding wire - Google Patents
Transformer winding wire Download PDFInfo
- Publication number
- US1810499A US1810499A US403915A US40391529A US1810499A US 1810499 A US1810499 A US 1810499A US 403915 A US403915 A US 403915A US 40391529 A US40391529 A US 40391529A US 1810499 A US1810499 A US 1810499A
- Authority
- US
- United States
- Prior art keywords
- wire
- silver
- core
- copper
- winding wire
- 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
- 238000004804 winding Methods 0.000 title description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 14
- 239000004332 silver Substances 0.000 description 14
- 229910052709 silver Inorganic materials 0.000 description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 9
- 239000010949 copper Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910001316 Ag alloy Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- YCKOAAUKSGOOJH-UHFFFAOYSA-N copper silver Chemical compound [Cu].[Ag].[Ag] YCKOAAUKSGOOJH-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000007152 ring opening metathesis polymerisation reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
Definitions
- the present invention relates to transformers, and, more particularly, to wire for windings of small transformers employed in wireless and similar purposes.
- the wire is usually drawn out to a very thin wire.
- a material must be used which has a sufficient tensile strength.
- the material of the said wire must not have too high a specific resistance, and, besides, it must be resistant to corrosion so that if in the wound wire the insulation, which naturally is extremely thin, shows slight faults, corrosion of the wire will be out of the question.
- copper does not fulfill the condition of having sufficient tensile strength, and nearly all the alloys of this metal do not satisfy at the same time the requirements of conductivity and resistance against corrosion.
- Silver offers, it is true, a suflicient resistance against corrosion, but it also has too small a tensile strength.
- the wire constituting at least one of the windings of the transformer consists of a core of a metal or alloy which has a great tensile strength, said core being surrounded by a sheath consisting of a metal or alloy which is highly resistant to corrosion.
- the core of the wire need not be highly resistant against corroslon.
- a wire for constituting the winding or windings, use may be made, for example, of a wire whose core consists of an alloy containing about ninety per cent of copper and about ten per cent of silver, said core bein surrounded by a sheath of pure silver. Tt has been found that when for winding such transformers, use is made of enamelled copper wire, the tensile strength of this metal is considerably reduced by the enamelling operation.
- the use of a windin wire according to the present invention a ords the advantage that the tensile strength of the enamelled wire still meets the requirements. 7
- a high frequency transformer in which the wire of at least one of the windings consists of a metallic core of great tensile strength and low corrosion resistance surrounded by a metallic sheath which is highly resistant to corrosion.
- a high'frequency transformer in which the core of the wire of at least one of the windings consists of a copper-silver alloy which contains a small percentage of silver, said core being surrounded by a sheath of silver, said Wire being insulated by a layer of enamel.
- a high frequency transformer having a Winding of wire comprising a metallic core consisting of about ninety per cent of copper and ten per cent of silver, and a silver sheath surrounding said core.
- a radio frequency transformer having a Winding of Wire, comprising a core including a large amount of copper and a relatively small amount of silver, and a layer of silver surrounding the core.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Description
Patented June 16, 1931 UNITED STATES PATENT OFFICE- .TOHAN ROMP, OF EINDHOVEN, NETHERLANDS, ASSTGNOR TO RADIO CORPORATION OF AMERICA, A CORPORATION OE DELAWARE TRANSFORMER WINDING WIRE Ho Drawing. Application filed October 31, 1929, Serial No. 403,915, and in the Netherlands December 4, 1928.
The present invention relates to transformers, and, more particularly, to wire for windings of small transformers employed in wireless and similar purposes.
In order that such transformers may be given very small dimensions and yet include a large number of turns, the wire is usually drawn out to a very thin wire. For this purpose, a material must be used which has a sufficient tensile strength. Moreover, the material of the said wire must not have too high a specific resistance, and, besides, it must be resistant to corrosion so that if in the wound wire the insulation, which naturally is extremely thin, shows slight faults, corrosion of the wire will be out of the question.
In general, copper does not fulfill the condition of having sufficient tensile strength, and nearly all the alloys of this metal do not satisfy at the same time the requirements of conductivity and resistance against corrosion. Silver offers, it is true, a suflicient resistance against corrosion, but it also has too small a tensile strength.
There are known, however, alloys of silver and copper which possess the three above mentioned properties. In order to ensure a sufficient resistance against corrosion, the alloy must contain at least ninety-four per cent of silver, for at this percentage free copper crystals no longer occur in it. This is disclosed, for example, in United States Patent 1,718,080 issued June 18, 1929.
However, the use of a winding wire having such a high content of silver is rather expensive. Thus, this invention has for its object the provision of a wire which has a slight total content of silver, and, which notwithstanding, possesses the aforementioned re uired properties.
ccording to my invention, the wire constituting at least one of the windings of the transformer, consists of a core of a metal or alloy which has a great tensile strength, said core being surrounded by a sheath consisting of a metal or alloy which is highly resistant to corrosion. In this case, the core of the wire need not be highly resistant against corroslon.
For constituting the winding or windings, use may be made, for example, of a wire whose core consists of an alloy containing about ninety per cent of copper and about ten per cent of silver, said core bein surrounded by a sheath of pure silver. Tt has been found that when for winding such transformers, use is made of enamelled copper wire, the tensile strength of this metal is considerably reduced by the enamelling operation. The use of a windin wire according to the present invention a ords the advantage that the tensile strength of the enamelled wire still meets the requirements. 7
While I have indicated and described one arrangement for carrying my invention into elfect, it will be apparent to one skilled in the art that my invention is by no means limited to the particular organization shown and described, but that many modifications may be employed, without departing from the scope of my invention as set forth in the appended claims.
Whatl claim is:
1. A high frequency transformer in which the wire of at least one of the windings consists of a metallic core of great tensile strength and low corrosion resistance surrounded by a metallic sheath which is highly resistant to corrosion.
2. A transformer, according to claim 1, in which the sheath of the wire consists of an alloy of silver and copper free of copper crysta s.
3. A transformer, according to claim 1, in which the core of the wire consists of an alloy of copper and silver which contains a small percentage of silver.
4. A high'frequency transformer in which the core of the wire of at least one of the windings consists of a copper-silver alloy which contains a small percentage of silver, said core being surrounded by a sheath of silver, said Wire being insulated by a layer of enamel.
5. A high frequency transformer having a Winding of wire comprising a metallic core consisting of about ninety per cent of copper and ten per cent of silver, and a silver sheath surrounding said core.
6. A radio frequency transformer having a Winding of Wire, comprising a core including a large amount of copper and a relatively small amount of silver, and a layer of silver surrounding the core.
JOHAN ROMP.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1810499X | 1928-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1810499A true US1810499A (en) | 1931-06-16 |
Family
ID=19873131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US403915A Expired - Lifetime US1810499A (en) | 1928-12-04 | 1929-10-31 | Transformer winding wire |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1810499A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268645A (en) * | 1961-11-20 | 1966-08-23 | Lucifer Sa | Process for embedding a winding in a mixture of thermoplastic synthetic material |
| US3437776A (en) * | 1967-04-13 | 1969-04-08 | Gen Motors Corp | Dielectric heating device and rf control coils therefor |
| US4756467A (en) * | 1986-04-03 | 1988-07-12 | Carlisle Corporation | Solderable elements and method for forming same |
| US4859811A (en) * | 1986-03-18 | 1989-08-22 | Sumitomo Electric Industries, Ltd. | Electrical conductor |
| US20070202349A1 (en) * | 2006-02-24 | 2007-08-30 | Hon Hai Precision Industry Co., Ltd. | Copper-silver alloy wire and method for manufacturing the same |
| WO2016020588A1 (en) * | 2014-08-06 | 2016-02-11 | Nexans | Electrical conductor for aeronautical applications |
-
1929
- 1929-10-31 US US403915A patent/US1810499A/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3268645A (en) * | 1961-11-20 | 1966-08-23 | Lucifer Sa | Process for embedding a winding in a mixture of thermoplastic synthetic material |
| US3437776A (en) * | 1967-04-13 | 1969-04-08 | Gen Motors Corp | Dielectric heating device and rf control coils therefor |
| US4859811A (en) * | 1986-03-18 | 1989-08-22 | Sumitomo Electric Industries, Ltd. | Electrical conductor |
| US4756467A (en) * | 1986-04-03 | 1988-07-12 | Carlisle Corporation | Solderable elements and method for forming same |
| US20070202349A1 (en) * | 2006-02-24 | 2007-08-30 | Hon Hai Precision Industry Co., Ltd. | Copper-silver alloy wire and method for manufacturing the same |
| US7491449B2 (en) * | 2006-02-24 | 2009-02-17 | Hon Hai Precision Industry Co., Ltd. | Copper-silver alloy wire and method for manufacturing the same |
| WO2016020588A1 (en) * | 2014-08-06 | 2016-02-11 | Nexans | Electrical conductor for aeronautical applications |
| FR3024798A1 (en) * | 2014-08-06 | 2016-02-12 | Nexans | ELECTRICAL CONDUCTOR FOR AERONAUTICAL APPLICATIONS |
| US9941028B2 (en) | 2014-08-06 | 2018-04-10 | Nexans | Electrical conductor for aeronautical applications |
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