Patent US3119927A successfully refreshed from Google Patents.
US3119927A
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US
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Arrangement for resistance flash butt-welding
Assignee: HA Schlatter AG
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Filing: 1961-02-27
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Granted: 1964-01-28
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Expires: 1981-02-27
Abstract
No abstract record available.
Inventors
- 👤 Neukom Alfred
- 👤 Neidhardt Hans Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/04; B23K11/24; B23K11/248; B23K9/00; B23K9/06; B23K9/073; B23K9/0731; B23K9/0735
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
AN APPARATUS FOR FLASH BUTT RESISTANCE WELDING BY PREHEATING, FLASHING AND UPSETTING THE ENDS OF WORK PIECES TO BE WELDED TOGETHER COMPRISING IN COMBINATION A POLYPHASE ELECTRIC POWER SOURCE, TRANSFORMER MEANS HAVING PRIMARY AND SECONDARY WINDINGS, IGNITRON MEANS CONNECTED TO SAID POLYPHASE POWER SOURCE AND TO SAID PRIMARY WINDING, AND IGNITRON CONTROL MEANS CONNECTED TO SAID POLYPHASE ELECTRIC POWER SOURCE AND TO SAID IGNITRON MEANS, SAID IGNITRON CONTROL MEANS FUNCTIONING TO PROVIDE AT LEAST TWO MODES OF OPERATION, EACH OF A DIFFERENT TIME DURATION TO RENDER SAID IGNITRON MEANS SUCCESSIVELY CONDUCTIVE TO FIRST SUPPLY SAID PRIMARY WINDING WITH A FIRST ALTERNATING VOLTAGE FOR PRODUCING A PREHEATING CURRENT TO SAID WORKPIECE ENDS, SAID SECOND ALTERNATING VOLTAGE HAVING A FREQUENCY HIGHER THAN THE FREQUENCY OF SAID FIRST ALTERNATING VOLTAGE AND EACH HALF WAVE OF SAID FIRST ALTERNATING VOLTAGE HAVING AN INTERRUPTION AT THE END OF THE HALF WAVE.
Claim 2
Independent Claim
146 words
AN APPARATUS FOR FLASH BUTT RESISTANCE WELDING BY PREHEATING, FLASHING AND UPSETTING THE ENDS OF WORK PIECES TO BE WELDED TOGETHER COMPRISING IN COMBINATION A POLYPHASE ELECTRIC POWER SOURCE, TRANSFORMER MEANS HAVING PRIMARY AND SECONDARY WINDINGS, IGNITRON MEANS CONNECTED TO SAID POLYPHASE POWER SOURCE AND TO SAID PRIMARY WINDING, AND IGNITRON CONTROL MEANS CONNECTED TO SAID POLYPHASE ELECTRIC POWER SOURCE AND TO SAID IGNITRON MEANS, SAID IGNITRON CONTROL MEANS FUNCTIONING TO PROVIDE AT LEAST TWO MODES OF OPERATION, EACH OF A DIFFERENT TIME DURATION TO RENDER SAID IGNITRON MEANS SUCCESSIVELY CONDUCTIVE TO FIRST SUPPLY SAID PRIMARY WINDING WITH A FIRST ALTERNATING VOLTAGE FOR PRODUCING A PREHEATING CURRENT TO SAID WORKPIECE ENDS, SAID SECOND ALTERNATING VOLTAGE HAVING A FREQUENCY HIGHER THAN THE FREQUENCY OF SAID FIRST ALTERNATING VOLTAGE AND EACH HALF WAVE OF SAID FIRST ALTERNATING VOLTAGE HAVING AN INTERRUPTION AT THE END OF THE HALF WAVE.
References Cited (Backward Citations)
US2356859A
Cited
US2488899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |