GB693406A - Method of and apparatus for improving the contact stability of continuously adjustable electric transformers and the like - Google Patents
Method of and apparatus for improving the contact stability of continuously adjustable electric transformers and the likeInfo
- Publication number
- GB693406A GB693406A GB1767451A GB1767451A GB693406A GB 693406 A GB693406 A GB 693406A GB 1767451 A GB1767451 A GB 1767451A GB 1767451 A GB1767451 A GB 1767451A GB 693406 A GB693406 A GB 693406A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- conductor
- brush
- improving
- turns
- 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
Links
- 239000004020 conductor Substances 0.000 abstract 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910000510 noble metal Inorganic materials 0.000 abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052737 gold Inorganic materials 0.000 abstract 1
- 239000010931 gold Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052763 palladium Inorganic materials 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- 229910052703 rhodium Inorganic materials 0.000 abstract 1
- 239000010948 rhodium Substances 0.000 abstract 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 238000005494 tarnishing Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/06—Variable transformers or inductances not covered by group H01F21/00 with current collector gliding or rolling on or along winding
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Non-Insulated Conductors (AREA)
Abstract
693,406. Transformers and inductances. GENERAL RADIO CO. July 25, 1951, No. 17674/51. Class 38 (ii). [Also in Group XXXVI] An electrical apparatus-such as a variable ratio electric transformer-having a conductor 1 arranged in a plurality of turns and a brush 4 slidable across the turns in engagement with a contact track 7 formed thereon, is characterized by the fact that the conductor is provided at longitudinally-spaced intervals with contact patches 5 formed by coating the conductor with a metal selected from the group comprising gold, platinum, palladium, rhodium, silver and nickel, the patches together forming the contact track engaged by the brush. The use of noble metals for the contact track obviates tarnishing thereof in corrosive atmospheres and thus providing a constant contact resistance, which resistance may be predetermined by the selection of the noble metal and the brush material. Graphs showing contact resistance against periods of use for the metals enumerated above are included in the Specification. Specification 439,567 is referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US221878A US2949592A (en) | 1951-04-19 | 1951-04-19 | Adjustable transformer with stabilized contact track |
| GB1767451A GB693406A (en) | 1951-07-25 | 1951-07-25 | Method of and apparatus for improving the contact stability of continuously adjustable electric transformers and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1767451A GB693406A (en) | 1951-07-25 | 1951-07-25 | Method of and apparatus for improving the contact stability of continuously adjustable electric transformers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB693406A true GB693406A (en) | 1953-07-01 |
Family
ID=10099217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1767451A Expired GB693406A (en) | 1951-04-19 | 1951-07-25 | Method of and apparatus for improving the contact stability of continuously adjustable electric transformers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB693406A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1289915B (en) * | 1964-01-03 | 1969-02-27 | Tech Physikalische Werkstaette | Variable transformer with toroidal core in cast resin cast execution and process for its production |
-
1951
- 1951-07-25 GB GB1767451A patent/GB693406A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1289915B (en) * | 1964-01-03 | 1969-02-27 | Tech Physikalische Werkstaette | Variable transformer with toroidal core in cast resin cast execution and process for its production |
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