Patent US3304485A successfully refreshed from Google Patents.
US3304485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding arc power supply
Assignee: Union Carbide Corp
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Filing: 1963-12-26
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Granted: 1967-02-14
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 August F Manz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:57
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/10; B23K9/1006; B23K9/1012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN APPARATUS FOR SUPPLYING ARC CURRENT FROM AN A.C. SOURCE, COMPRISING A TRANSFORMER, MEANS FOR ADJUSTING THE OUTPUT OF SAID TRANSFORMER TO SELECT A DESIRED POTENTIAL ACROSS OUTPUT TERMINALS, MEANS INCLUDING A CONTACT OR SWITCH FOR CONNECTING THE OUTPUT OF SAID TRANSFORMER TO SUCH OUTPUT TERMINALS, A VOLTMETER CONNECTED TO SUCH TERMINALS FOR INDICATING SUCH POTENTIAL WHEN SAID CONTACTOR SWITCH IS CLOSED AND CIRCUIT MEANS INCLUDING A SWITCH FOR CONNECTING SAID VOLTMETER TO THE OUTPUT OF SAID TRANSFORMER WHEN SAID CONTACTOR SWITCH IS OPEN TO INDICATE THE POTENTIAL THAT WOULD SUBSEQUENTLY APPEAR ACROSS SUCH TERMINALS WHEN THE CONTACTOR SWITCH IS CLOSED, WHEREBY THE DESIRED POTENTIAL ACROSS SUCH TERMINALS CAN BE PRESELECTED BY OPERATING SAID ADJUSTABLE MEANS WHILE SUCH TERMINALS ARE DEENERGIZED.
Claim 2
Independent Claim
121 words
AN APPARATUS FOR SUPPLYING ARC CURRENT FROM AN A.C. SOURCE, COMPRISING A TRANSFORMER, MEANS FOR ADJUSTING THE OUTPUT OF SAID TRANSFORMER TO SELECT A DESIRED POTENTIAL ACROSS OUTPUT TERMINALS, MEANS INCLUDING A CONTACT OR SWITCH FOR CONNECTING THE OUTPUT OF SAID TRANSFORMER TO SUCH OUTPUT TERMINALS, A VOLTMETER CONNECTED TO SUCH TERMINALS FOR INDICATING SUCH POTENTIAL WHEN SAID CONTACTOR SWITCH IS CLOSED AND CIRCUIT MEANS INCLUDING A SWITCH FOR CONNECTING SAID VOLTMETER TO THE OUTPUT OF SAID TRANSFORMER WHEN SAID CONTACTOR SWITCH IS OPEN TO INDICATE THE POTENTIAL THAT WOULD SUBSEQUENTLY APPEAR ACROSS SUCH TERMINALS WHEN THE CONTACTOR SWITCH IS CLOSED, WHEREBY THE DESIRED POTENTIAL ACROSS SUCH TERMINALS CAN BE PRESELECTED BY OPERATING SAID ADJUSTABLE MEANS WHILE SUCH TERMINALS ARE DEENERGIZED.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |