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EP0159256A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Very low power plasma-cutting equipment

Assignee: Air Liquide SA
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Filing: 1985-03-29
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Granted: —
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Expires: 2005-03-29
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Abstract

Abstract Translated from French L'invention concerne le coupage ou soudage plasma. The invention relates to plasma cutting or welding. L'amoçage d'arc est provoqué par le court-circuit initial entre électrode (2), tuyère (3) et pièce (7), par l'excitation, par la source de très basse tension (31), d'un relais (48) de commande, (via 43 et 42), de la fermeture du contact principal (15), après quoi le relais (48) est maintenu en l'état par le courant de soudage ou coupage générant une tension aux bornes de l'inductance (23). Arcing is caused by the initial short circuit between electrode (2), nozzle (3) and part (7), by the excitation, by the very low voltage source (31), of a relay (48) for controlling (via 43 and 42) the closing of the main contact (15), after which the relay (48) is maintained in the state by the welding or cutting current generating a voltage across the terminals of the inductance (23). Application à la commande de torche à allumage par court-circuit électrode-tuyère-torche. Application to the ignition torch control by electrode-nozzle-torch short circuit.

Inventors

  • 👤 Gérard Marhic
  • 👤 Francis Remy

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 11:46
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; B; B23; B23K; B23K10/00; B23K10/02; H05H1/3421; H05H1/36; H05H1/3489

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

FR1549642A Cited
US3997756A Cited
DE2541166A1 Cited
EP0003482A1 Cited
EP0014613A1 Cited

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