US3845543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a vacuum switch contact
Assignee: Rockwell Automation Switzerland GmbH
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Filing: 1973-02-22
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Granted: 1974-11-05
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Expires: 1993-02-22
Abstract
Abstract A method of producing a vacuum switch contact in which a support material in the form of thin sheet metal having a low vapor pressure is placed in a vacuum chamber and heated to a temperature above 600*C to degas it. The support material is then vapor coated in vacuo with a material having a high vapor pressure. The sheet metal is formed into thin layers which are pressed together and heated to a temperature above the melting point of the high vapor pressure material until diffusion of the two materials and soldering of the compressed layers of sheet metal take place, whereupon the contact is cooled and removed from the vacuum tank.
Inventors
- 👤 A Roth
- 👤 J Amsler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:00
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49105; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49211; Y10T29/49213
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A method of producing a vacuum switch contact constituted by a support material having a low vapor pressure and a further material having a high vapor pressure deposited on the support material by evaporation in vacuo, said method comprising placing a supply of the support material in sheet form having a thickness of 0.05 to 0.5 mm in a vacuum chamber at a vacuum pressure of at least 10 3 Torr, heating successive sections of said supply of support material in said chamber to a temperature above 600*C to degas the material, subsequently vapor-coating in said chamber said successive sections of the support material with said further material of high vapor pressure, reforming in said chamber the now coated support material into its original supply form, subjecting the supply of coated support material in said vacuum chamber to a compressive force at a temperature above the melting point of said further material to effect diffusion of the two materials and joinder thereof, and then cooling and removing the now formed contact from the vacuum chamber.
Claim 2
Independent Claim
175 words
A method of producing a vacuum switch contact constituted by a support material having a low vapor pressure and a further material having a high vapor pressure deposited on the support material by evaporation in vacuo, said method comprising placing a supply of the support material in sheet form having a thickness of 0.05 to 0.5 mm in a vacuum chamber at a vacuum pressure of at least 10 3 Torr, heating successive sections of said supply of support material in said chamber to a temperature above 600*C to degas the material, subsequently vapor-coating in said chamber said successive sections of the support material with said further material of high vapor pressure, reforming in said chamber the now coated support material into its original supply form, subjecting the supply of coated support material in said vacuum chamber to a compressive force at a temperature above the melting point of said further material to effect diffusion of the two materials and joinder thereof, and then cooling and removing the now formed contact from the vacuum chamber.
Claim 3
Dependent Claim
78 words
A method as claimed in claim 1 wherein the supply of support material is in the form of thin sheet metal wound in the form of a reel, the heating of successive sections of said material to degas the same being effected by continously unwinding the sheet metal and passing it through a furnace disposed in said vacuum chamber, the reforming of the coated material being effected by rewinding the coated material in the form of a reel.
Claim 4
Dependent Claim
37 words
A method as claimed in claim 1 wherein the supply of support material is in the form of thin sheets stacked on one another, the sheets being individually degassed and coated and then reformed by being re-stacked.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |