US3360683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-state pulse generator for electric-discharge machining
Assignee: Japan Kinoko Research Center Foundation
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Filing: 1965-10-06
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Granted: 1967-12-26
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Expires: 1985-10-06
Abstract
No abstract record available.
Inventors
- 👤 Inoue Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:44
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN AN APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY INTERMITTENT ELECTRICAL DISCHARGE ACROSS A GAP BETWEEN AN ELECTRODE AND THE WORKPIECE IN THE PRESENCE OF A DIELECTRIC COOLANT, A MACHINING POWER CIRCUIT FOR SUPPLYING MACHINING POWER PULSES TO SAID GAP COMPRISING A POWER SUPPLY, A PERIODICALLY OPERATED ELECTRONIC SWITCHING MEANS HAVING PRINCIPAL ELECTRODES CONNECTED IN A SERIES CIRCUIT BETWEEN SAID POWER SUPPLY AND SAID GAP, A VARIABLE MAGNITUDE RESISTOR CONNECTED IN SAID SERIES CIRCUIT WITH SAID GAP, CURRENT SENSING MEANS COUPLED TO SAID SERIES CIRCUIT FOR PROVIDING AN OUTPUT SIGNAL REPSONSIVE TO ABNORMAL GAP CHARACTERISTIC, AND MEANS COUPLING SAID SENSING MEANS TO SAID RESISTOR FOR SELECTIVELY INCREASING THE MAGNITUDE OF SAID RESISTOR TO LIMIT GAP CURRENT FLOW RESPONSIVE TO SAID SIGNAL.
Claim 2
Dependent Claim
121 words
IN AN APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY INTERMITTENT ELECTRICAL DISCHARGE ACROSS A GAP BETWEEN AN ELECTRODE AND THE WORKPIECE IN THE PRESENCE OF A DIELECTRIC COOLANT, A MACHINING POWER CIRCUIT FOR SUPPLYING MACHINING POWER PULSES TO SAID GAP COMPRISING A POWER SUPPLY, A PERIODICALLY OPERATED ELECTRONIC SWITCHING MEANS HAVING PRINCIPAL ELECTRODES CONNECTED IN A SERIES CIRCUIT BETWEEN SAID POWER SUPPLY AND SAID GAP, A VARIABLE MAGNITUDE RESISTOR CONNECTED IN SAID SERIES CIRCUIT WITH SAID GAP, CURRENT SENSING MEANS COUPLED TO SAID SERIES CIRCUIT FOR PROVIDING AN OUTPUT SIGNAL REPSONSIVE TO ABNORMAL GAP CHARACTERISTIC, AND MEANS COUPLING SAID SENSING MEANS TO SAID RESISTOR FOR SELECTIVELY INCREASING THE MAGNITUDE OF SAID RESISTOR TO LIMIT GAP CURRENT FLOW RESPONSIVE TO SAID SIGNAL.
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) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |