US3257583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impulse generating circuit for intermittent discharge machining
Assignee: Elox Corporation of Michigan
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Filing: 1962-05-21
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Granted: 1966-06-21
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Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 Pfau Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022; B23K; B23K9/00; H; H03; H03K; H03K17/00; H03K17/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY ELECTRICAL DISCHARGE ACROSS A GAP IN THE PRESENCE OF A DIELECTRIC COOLANT COMPRISING A MACHINING POWER SOURCE, A PERIODICALLY OPENED AND CLOSED SWITCH OPERATIVELY CONNECTED BETWEEN SAID SOURCE AND SAID GAP FOR PROVIDING MACHINING PULSES THERETO, AN INDUCTIVE STORAGE MEANS CONNECTED IN SERIES WITH SAID SWITCH AND SAID GAP, SAID INDUCTIVE STORAGE MEANS ENERGIZED IN PHASE WITH THE CLOSSURE OF SAID SWITCH AND THE FIRING OF SAID GAP, AND A UNIDIRECTIONAL CURRENT CONDUCTING DEVICE CONNECTED ACROSS SAID INDUCTIVE STORAGE MEANS AND SAID GAP, SAID DEVICE PHASED TO BLOCK CURRENT FLOW DURING CLOSURE OF SAID SWITCH AND PHASED TO CONDUCT CURRENT FLOW FROM SAID INDUCTIVE STORAGE MEANS DURING OPENING OF SAID SWITTCH, SAID INDUCTIVE STORAGE MEANS OPERABLE TO PROVIDE CONTINUED CURRENT FLOW THROUGH SAID GAP AND SAID DEVICE A PREDETERMINED TIME AFTER OPENING OF SAID SWITCH.
Claim 2
Dependent Claim
142 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY ELECTRICAL DISCHARGE ACROSS A GAP IN THE PRESENCE OF A DIELECTRIC COOLANT COMPRISING A MACHINING POWER SOURCE, A PERIODICALLY OPENED AND CLOSED SWITCH OPERATIVELY CONNECTED BETWEEN SAID SOURCE AND SAID GAP FOR PROVIDING MACHINING PULSES THERETO, AN INDUCTIVE STORAGE MEANS CONNECTED IN SERIES WITH SAID SWITCH AND SAID GAP, SAID INDUCTIVE STORAGE MEANS ENERGIZED IN PHASE WITH THE CLOSSURE OF SAID SWITCH AND THE FIRING OF SAID GAP, AND A UNIDIRECTIONAL CURRENT CONDUCTING DEVICE CONNECTED ACROSS SAID INDUCTIVE STORAGE MEANS AND SAID GAP, SAID DEVICE PHASED TO BLOCK CURRENT FLOW DURING CLOSURE OF SAID SWITCH AND PHASED TO CONDUCT CURRENT FLOW FROM SAID INDUCTIVE STORAGE MEANS DURING OPENING OF SAID SWITTCH, SAID INDUCTIVE STORAGE MEANS OPERABLE TO PROVIDE CONTINUED CURRENT FLOW THROUGH SAID GAP AND SAID DEVICE A PREDETERMINED TIME AFTER OPENING OF SAID SWITCH.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |