Patent US3267327A successfully refreshed from Google Patents.
US3267327A
Expired / Lapsed
US
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Electrical discharge machining power circuit
Assignee: Elox Corporation of Michigan
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Filing: 1963-10-15
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Granted: 1966-08-16
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Expires: 1983-10-15
Abstract
No abstract record available.
Inventors
- 👤 Robert S Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY MEANS OF INTERMITTENT ELECTRICAL DISCHARGE ACROSS A DIELECTRIC FILLED GAP BETWEEN AN ELECTRODE TOOL AND THE WORKPIECE, COMPRISING A SOURCE OF MACHINING POWER, AN ELECTRONIC SWITCH HAVING A CONTROL ELECTRODE AND HAVING ITS PRINCIPAL ELECTRODES CONNECTED BETWEEN SAID SOURCE AND SAID GAP, MEANS FOR RENDERING SAID SWITCH ALTERNATELY CONDUCTIVE AND NONCONDUCTIVE TO PROVIDE DISCRETE IMPULSES ACROSS SAID GAP, A VOLAGE LIMITING MEANS OPERATIVELY CONNECTED TO THE CONTROL ELECTRODE OF SAID SWITCH FOR LIMITING ITS OUTPUT ON GAP OPEN CIRCUIT TO A PREDETERMINED LOWER VOLTAGE MAGNITUDE THAN SAID SOURCE, AND MEANS FOR RENDERING SAID VOLTAGE LIMITING MEANS OPERABLE AFTER INITIATION OF BUT PRIOR TO NORMAL COMPLETION OF EACH DISCRETE IMPULSE.
Claim 2
Dependent Claim
116 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY MEANS OF INTERMITTENT ELECTRICAL DISCHARGE ACROSS A DIELECTRIC FILLED GAP BETWEEN AN ELECTRODE TOOL AND THE WORKPIECE, COMPRISING A SOURCE OF MACHINING POWER, AN ELECTRONIC SWITCH HAVING A CONTROL ELECTRODE AND HAVING ITS PRINCIPAL ELECTRODES CONNECTED BETWEEN SAID SOURCE AND SAID GAP, MEANS FOR RENDERING SAID SWITCH ALTERNATELY CONDUCTIVE AND NONCONDUCTIVE TO PROVIDE DISCRETE IMPULSES ACROSS SAID GAP, A VOLAGE LIMITING MEANS OPERATIVELY CONNECTED TO THE CONTROL ELECTRODE OF SAID SWITCH FOR LIMITING ITS OUTPUT ON GAP OPEN CIRCUIT TO A PREDETERMINED LOWER VOLTAGE MAGNITUDE THAN SAID SOURCE, AND MEANS FOR RENDERING SAID VOLTAGE LIMITING MEANS OPERABLE AFTER INITIATION OF BUT PRIOR TO NORMAL COMPLETION OF EACH DISCRETE IMPULSE.
References Cited (Backward Citations)
US1283715A
Cited
US2265602A
Cited
US2854615A
Cited
US2914704A
Cited
US3018411A
Cited
US3098192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |