Patent US3852560A successfully refreshed from Google Patents.
US3852560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous electronic heating device for metallic wire and sheet metal
Assignee: Cockerill SA
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Filing: 1973-05-21
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Granted: 1974-12-03
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Expires: 1993-05-21
Abstract
Abstract A device for heating a metallic product of great length and small thickness, particularly a wire or sheet metal, by means of a flow of electrons comprises a container in which there is maintained a permanent vacuum of 10 3 to 10 5 torr. The container contains the metallic product to be heated, a means for the production of electrons which, by the action of an electrical field, are hurled onto the product, and reflecting means for returning toward the product any electrons which have escaped from said field.
Inventors
- 👤 D Streel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:42
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/56; C23C14/562; B; B23; B23K; B23K15/00; B23K15/0046; B23K15/0086; C23C14/54; C23C14/541; H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/06; H01J37/063; H01J37/30; H01J37/305; H01J37/3053
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
An electron heating device for a metallic wire or sheet comprising, in combination: a processing enclosure in which is maintained a vacuum of 103 to 10 5 torr and which is traversed by a continuously advancing metallic wire or sheet to be heated; an electron emitter mounted in the enclosure, said emitter comprising an electrical conductor in the form of a coil having at least one turn and along the axis of which the metallic wire or sheet is continuously advancing; a first source of current connected to said coil; a second source of current whose negative teriminal is connected to said coil and which has a very strong negative potential, thereby establishing an electrostatic field for accelerating the emitted electrons toward the metallic wire or sheet; and a metallic electron reflecting means connected to the negative terminal of said second source of current for reflecting back to the metallic wire or sheet any electrons which have escaped the electrostatic field.
Claim 2
Dependent Claim
161 words
An electron heating device for a metallic wire or sheet comprising, in combination: a processing enclosure in which is maintained a vacuum of 103 to 10 5 torr and which is traversed by a continuously advancing metallic wire or sheet to be heated; an electron emitter mounted in the enclosure, said emitter comprising an electrical conductor in the form of a coil having at least one turn and along the axis of which the metallic wire or sheet is continuously advancing; a first source of current connected to said coil; a second source of current whose negative teriminal is connected to said coil and which has a very strong negative potential, thereby establishing an electrostatic field for accelerating the emitted electrons toward the metallic wire or sheet; and a metallic electron reflecting means connected to the negative terminal of said second source of current for reflecting back to the metallic wire or sheet any electrons which have escaped the electrostatic field.
Claim 3
Dependent Claim
22 words
An electron heating device according to claim 1 characterized in which the electron reflecting means is a housing enclosing the electron emitter.
Claim 4
Dependent Claim
25 words
An electron heating device according to claim 2 characterized in which the housing comprises two hollow separately detachable members not in contact with each other.
Claim 5
Dependent Claim
60 words
An electron heating device according to claim 1 in which the electron emitter is a coil turned in an open loop having a re-entrant point forming a passage for the continuously advancing metallic wire or sheet, the passage being of a dimension sufficient to permit the wire or sheet to be spaced from 5 to 15 mm from the coil.
Claim 6
Dependent Claim
61 words
An electron heating device according to claim 1 in which the electron emitter is a coil turned so that it is completely closed on itself and provides a passage for the continuously advancing metallic wire or sheet, the passage being of a dimension sufficient to permit the wire or sheet to be spaced from 5 to 15 mm from the coil.
Claim 7
Dependent Claim
24 words
An electron heating device according to claim 1 in which the second source of current provides a voltage of from 500 to 15, 000.
References Cited (Backward Citations)
US3020387A
Cited
US3172007A
Cited
US3244855A
Cited
US3440390A
Cited
US3596046A
Cited
US3529123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |