US3277337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long on-time pulse cut-off circuitry for electrical discharge machining apparatus
Assignee: Elox Corp
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Filing: 1961-05-17
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Granted: 1966-10-04
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Robert S Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:27
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY MEANS OF INTERMITTENT ELECTRICAL DISCHAGE ACROSS A GAP BETWEEN AN ELECTRODE TOOL AND THE WORKPIECE COMPRISING, A SOURCE OF MACHINING POWER, AN ELECTRONIC SWITCH CONNECTED BETWEEN SAID SOURCE AND SAID GAP, A PULSER OPERATIVELY ASSOCAITED WITH SAID SWITCH FOR RENDERING SAID SWITCH ALTERNATELY CONDUCTIVE AND NONCONDUCTIVE AT SELECTED FREQUENCY, A CUT-OFF DEVICE OPERATIVELY CONNECTED WITH SAID PULSER OPERABLE TO TRIGGER SAID PULSER TO RENDER SAID SWITCH INSTANTALY NONCONDUCITVE IN RESPONSE TO A DISCHARGE OF ABNORMAL CHARACTERISTIC AFTER INITIATION OF BUT PRIOR TO THE END OF, NORMAL DURATION OF SAID DISCHAGE, INCLUDING MEANS CONNECTED WITH SAID DEVICE AND PUSLER FOR DELAYING INITIATION OF THE FOLLOWING DISCHARGE FOR A TIME INTERVAL LONGER THAN THE NORMAL INTERVAL BETWEEN DISCHARGES.
Claim 2
Dependent Claim
123 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY MEANS OF INTERMITTENT ELECTRICAL DISCHAGE ACROSS A GAP BETWEEN AN ELECTRODE TOOL AND THE WORKPIECE COMPRISING, A SOURCE OF MACHINING POWER, AN ELECTRONIC SWITCH CONNECTED BETWEEN SAID SOURCE AND SAID GAP, A PULSER OPERATIVELY ASSOCAITED WITH SAID SWITCH FOR RENDERING SAID SWITCH ALTERNATELY CONDUCTIVE AND NONCONDUCTIVE AT SELECTED FREQUENCY, A CUT-OFF DEVICE OPERATIVELY CONNECTED WITH SAID PULSER OPERABLE TO TRIGGER SAID PULSER TO RENDER SAID SWITCH INSTANTALY NONCONDUCITVE IN RESPONSE TO A DISCHARGE OF ABNORMAL CHARACTERISTIC AFTER INITIATION OF BUT PRIOR TO THE END OF, NORMAL DURATION OF SAID DISCHAGE, INCLUDING MEANS CONNECTED WITH SAID DEVICE AND PUSLER FOR DELAYING INITIATION OF THE FOLLOWING DISCHARGE FOR A TIME INTERVAL LONGER THAN THE NORMAL INTERVAL BETWEEN DISCHARGES.
References Cited (Backward Citations)
US2951969A
Cited
US3018411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |