Patent US3783231A successfully refreshed from Google Patents.
US3783231A
Expired / Lapsed
US
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Apparatus for vacuum-evaporation of metals under the action of an electric arc
Assignee: Individual
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Filing: 1972-03-22
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Granted: 1974-01-01
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Expires: 1992-03-22
Abstract
Abstract A method for vacuum-evaporation of metals under the action of an electric arc and using a magnetic field is characterized by the fact that for retaining a cathode spot of an electric arc, a constant magnetic field is substituted by a pulsed magnetic field whose intensity reaches a maximum when the cathode spot is shifted to a non-evaporable cathode surface. This enables the travel of the cathode spot of electric arc to be unaffected by the inhomogeneity of the magnetic field and by any possible lack of perpendicularity of its lines of force to the surface being evaporated. A device for carrying out the method employs a sensor to take up the effect of electric arc, which is so arranged as to straddle the non-evaporable cathode surface and takes up the effect of electric arc only when the cathode spot is found on the non-evaporable cathode surface; the device is simple in design, smaller in size, and features a simplified-construction of an electromagnet that needs less power to be operated as compared to the prior-art devices used for vacuum-evaporation of metals under the effect of an electric arc.
Inventors
- 👤 E Goldiner
- 👤 K Kirshfeld
- 👤 V Usov
- 👤 L Sablev
- 👤 J Dolotov
- 👤 L Getman
- 👤 V Gorbunov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:03
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/32; C23C14/325
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
210 words
A device for vacuum-evaporation of metals under the effect of an electric arc, comprising a cathode having an evaporable and a non-evaporable surface, said cathode being made of a solid metal to be evaporated by the cathode spot of said electric arc randomly moving over the evaporable surface of said cathode; an anode; means for generating said electric arc between said cathode and said anode; an electromagnet disposed so that at least one turn of said electromagnet facing the non-evaporable surface of said cathode forms a gap with said non-evaporable surface at the side of said evaporable surface of said cathode, the size of said gap being such that when said cathode spot shifts onto said non-evaporable surface said electric arc strikes at least partially between said non-evaporable surface and said turn of said electromagnet, said electromagnet being connected to said anode so that electric current flows in the turn of said electromagnet when said electric arc strikes between said nonevaporable surface and said turn, a magnetic field being induced as a result of the flow of said electric current, said magnetic field having lines of force which form an acute angle with said non-evaporable surface and force said cathode spot to return to said evaporable surface of said cathode.
Claim 2
Independent Claim
210 words
A device for vacuum-evaporation of metals under the effect of an electric arc, comprising a cathode having an evaporable and a non-evaporable surface, said cathode being made of a solid metal to be evaporated by the cathode spot of said electric arc randomly moving over the evaporable surface of said cathode; an anode; means for generating said electric arc between said cathode and said anode; an electromagnet disposed so that at least one turn of said electromagnet facing the non-evaporable surface of said cathode forms a gap with said non-evaporable surface at the side of said evaporable surface of said cathode, the size of said gap being such that when said cathode spot shifts onto said non-evaporable surface said electric arc strikes at least partially between said non-evaporable surface and said turn of said electromagnet, said electromagnet being connected to said anode so that electric current flows in the turn of said electromagnet when said electric arc strikes between said nonevaporable surface and said turn, a magnetic field being induced as a result of the flow of said electric current, said magnetic field having lines of force which form an acute angle with said non-evaporable surface and force said cathode spot to return to said evaporable surface of said cathode.
Claim 3
Independent Claim
156 words
A device for vacuum-evaporation of metals under the effect of an electric arc, comprising a cathode having an evaporable and a non-evaporable surface, said cathode being made of a solid metal to be evaporated by the cathode spot of said electric arc randomly moving over the evaporable surface of said cathode; an anode; means for generating said electric arc between said cathode and said anode; an electrode arranged so that when said cathode spot shifts onto the non-evaporable surface said electric arc strikes at least partially between said non-evaporable surface and said electrode; an electromagnet connected to said electrode and said anode so that at least a part of the current of said electric arc striking between said nonevaporable surface and said electrode flows in said electromagnet which is disposed so that when said current flows therein it induces a magnetic field which forces said cathode spot to return to said evaporable surface of said cathode.
Claim 4
Independent Claim
156 words
A device for vacuum-evaporation of metals under the effect of an electric arc, comprising a cathode having an evaporable and a non-evaporable surface, said cathode being made of a solid metal to be evaporated by the cathode spot of said electric arc randomly moving over the evaporable surface of said cathode; an anode; means for generating said electric arc between said cathode and said anode; an electrode arranged so that when said cathode spot shifts onto the non-evaporable surface said electric arc strikes at least partially between said non-evaporable surface and said electrode; an electromagnet connected to said electrode and said anode so that at least a part of the current of said electric arc striking between said nonevaporable surface and said electrode flows in said electromagnet which is disposed so that when said current flows therein it induces a magnetic field which forces said cathode spot to return to said evaporable surface of said cathode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |