Patent US3107291A successfully refreshed from Google Patents.
US3107291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode feed apparatus
Assignee: Chemetron Corp
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Filing: 1960-11-18
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Granted: 1963-10-15
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Expires: 1980-11-18
Abstract
No abstract record available.
Inventors
- 👤 Bruce M Evans
- 👤 Howard R Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:45
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/133; B23K9/1336
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN ARC WELDING APPARATUS, MEANS FOR FEEDING AN ELECTRODE TO A TORCH, AN ELECTRODE DRIVE MOTOR HAVING AN ARMATURE AND A FIELD WINDING TO DRIVE THE FEEDING MEANS, A CIRCUIT FOR CONNECTING THE MOTOR TO A POWER SOURCE, CONTROL MEANS IN SAID CIRCUIT INCLUDING MEANS CONTROLLING THE ENERGIZATION OF SAID CIRCUIT, MEANS TO SELECTIVELY ADJUST THE SPEED OF SAID MOTOR, AND MEANS TO QUICKLY DECELERATE SAID MOTOR CONCURRENTLY WITH THE DE-ENERGIZATION OF SAID CIRCUIT, SAID DECELERATING MEANS INCLUDING SWITCH MEANS ARRANGED TO CONNECT THE ARMATURE OF SAID MOTOR IN SERIES RELATION WITH ITS FIELD WINDING CONCURRENTLY WITH THE ENERGIZATION OF SAID CIRCUIT, AND TO OPEN THE CIRCUIT CONNECTING SAID MOTOR TO SAID SOURCE WHILE CONNECTING THE ARMATURE OF SAID MOTOR IN PARALLEL RELATION WITH ITS FIELD WINDING CONCURRENTLY WITH THE DEENERGIZATION OF SAID CIRCUIT, WHEREBY THE MOTOR CANNOT PICK UP SPEED IN THE REVERSE DIRECTION.
Claim 2
Dependent Claim
145 words
IN ARC WELDING APPARATUS, MEANS FOR FEEDING AN ELECTRODE TO A TORCH, AN ELECTRODE DRIVE MOTOR HAVING AN ARMATURE AND A FIELD WINDING TO DRIVE THE FEEDING MEANS, A CIRCUIT FOR CONNECTING THE MOTOR TO A POWER SOURCE, CONTROL MEANS IN SAID CIRCUIT INCLUDING MEANS CONTROLLING THE ENERGIZATION OF SAID CIRCUIT, MEANS TO SELECTIVELY ADJUST THE SPEED OF SAID MOTOR, AND MEANS TO QUICKLY DECELERATE SAID MOTOR CONCURRENTLY WITH THE DE-ENERGIZATION OF SAID CIRCUIT, SAID DECELERATING MEANS INCLUDING SWITCH MEANS ARRANGED TO CONNECT THE ARMATURE OF SAID MOTOR IN SERIES RELATION WITH ITS FIELD WINDING CONCURRENTLY WITH THE ENERGIZATION OF SAID CIRCUIT, AND TO OPEN THE CIRCUIT CONNECTING SAID MOTOR TO SAID SOURCE WHILE CONNECTING THE ARMATURE OF SAID MOTOR IN PARALLEL RELATION WITH ITS FIELD WINDING CONCURRENTLY WITH THE DEENERGIZATION OF SAID CIRCUIT, WHEREBY THE MOTOR CANNOT PICK UP SPEED IN THE REVERSE DIRECTION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |