US3485987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machining power supply for electrical discharge machining
Assignee: Elox Inc
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Filing: 1962-11-01
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Granted: 1969-12-23
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Expires: 1982-11-01
Abstract
No abstract record available.
Inventors
- 👤 Cecil P Porterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:26
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523; B; B23; B23H; B23H1/00; B23H1/02; B23H1/022; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A MACHINING POWER CIRCUIT FOR MACHINING A CONDUCTIVE WORKPIECE BY AN ELECTRODE SPACED THEREFROM BY A DIELECTRIC COOLANT FILLED GAP COMPRISING A SOURCE OF DIRECT CURRENT POTENTIAL, AN ENERGY STORAGE MEANS OPERATIVELY CONNECTED THEREACROSS AND ACROSS THE GAP, A FIRST UNIDIRECTIONAL SWITCHING MEANS OF THE GRID CONTROLLED TYPE CONNECTED INTERMEDIATE SAID SOURCE AND SAID ENERGY STORAGE MEANS, A SECOND UNIDIRECTIONAL SWITCHING MEANS OF THE GRID CONTROLLED TYPE CONNECTED INTERMEDIATE SAID ENERGY STORAGE MEANS AND THE GAP, MEANS FOR ALTERNATELY ACTIVATING SAID FIRST AND SECOND SWITCHING MEANS IN TIME PHASED RELATIONSHIP WITH THE CHARGING AND DISCHARGING OF SAID STORAGE MEANS AND INDUCTIVE MEANS OPERATIVELY CONNECTED TO EACH OF SAID SWITCHING MEANS AND SAID ENERGY STORAGE MEANS FOR DERIVING A RAPID TURN-OFF BIAS THEREFOR.
Claim 2
Dependent Claim
122 words
A MACHINING POWER CIRCUIT FOR MACHINING A CONDUCTIVE WORKPIECE BY AN ELECTRODE SPACED THEREFROM BY A DIELECTRIC COOLANT FILLED GAP COMPRISING A SOURCE OF DIRECT CURRENT POTENTIAL, AN ENERGY STORAGE MEANS OPERATIVELY CONNECTED THEREACROSS AND ACROSS THE GAP, A FIRST UNIDIRECTIONAL SWITCHING MEANS OF THE GRID CONTROLLED TYPE CONNECTED INTERMEDIATE SAID SOURCE AND SAID ENERGY STORAGE MEANS, A SECOND UNIDIRECTIONAL SWITCHING MEANS OF THE GRID CONTROLLED TYPE CONNECTED INTERMEDIATE SAID ENERGY STORAGE MEANS AND THE GAP, MEANS FOR ALTERNATELY ACTIVATING SAID FIRST AND SECOND SWITCHING MEANS IN TIME PHASED RELATIONSHIP WITH THE CHARGING AND DISCHARGING OF SAID STORAGE MEANS AND INDUCTIVE MEANS OPERATIVELY CONNECTED TO EACH OF SAID SWITCHING MEANS AND SAID ENERGY STORAGE MEANS FOR DERIVING A RAPID TURN-OFF BIAS THEREFOR.
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) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |