US3588436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for monitoring the welding current of welding apparatus
Assignee: Siemens AG
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Filing: 1969-10-17
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Granted: 1971-06-28
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Expires: 1989-10-17
Abstract
Abstract THE PRIMARY WINDING OF A TRANSFORMER IS CONNECTED IN PARALLEL WITH THE PRIMARY WINDING OF A WELDING TRANSFORMER. A PULSE GENERATOR IS CONNECTED TO THE SECONDARY WINDING OF THE TRANSFORMER VIA A RECTIFIER. THE PULSE GENERATOR PRODUCES A PULSE OF CONSTANT AMPLITUDE FOR SUCH LENGTH OF TIME AS THE VOLTAGE SUPPLIED TO IT BY THE RECTIFIER EXCEEDS A RESPONSE LEVEL. AN INTEGRATOR AMPLIFIER IS CONNECTED TO THE PULSE GENERATOR AND IS SWITCHED BACK TO ITS INITIAL CONDITION UPON THE COMPLETION OF A SUPPLY OF WELDING CURRENT TO THE WELDING APPARATUS. AN INDICATOR CONNECTED TO THE INTEGRATOR AMPLIFIER INDICATES WHEN THE VOLTAGE PRODUCED BY SUCH AMPLIFIER EXCEEDS THE RESPONSE LEVEL.
Inventors
- 👤 Hans Hoscheler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:35
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/25; B23K11/252
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |