US3328635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge machining power supply
Assignee: Elox Corporation of Michigan
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Filing: 1965-01-13
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Granted: 1967-06-27
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Expires: 1985-01-13
Abstract
No abstract record available.
Inventors
- 👤 Robert S Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:05
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN AN APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY ELECTRICAL DISCHARGES ACROSS A DIELECTRIC COOLANT FILLED GAP BETWEEN AN ELECTRODE TOOL AND THE WORKPIECE, COMPRISING A POWER SUPPLY, A PERIODICALLY OPERATED ELECTRONIC SWITCH HAVING A PAIR OF PRINCIPAL ELECTRODES, SAID ELECTRONIC SWITCH HAVING ITS PRINCIPAL ELECTRODES CONNECTED IN SERIES WITH A DIODE AND SAID GAP ACROSS SAID POWER SUPPLY FOR PROVIDING MACHINING POWER PULSES TO SAID GAP, AND A TRANSFORMER OF THE STEP-UP TYPE, SAID TRANSFORMER HAVING ITS PRIMARY WINDING OPERATIVELY CONNECTED ACROSS
Claim 2
Dependent Claim
83 words
IN AN APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY ELECTRICAL DISCHARGES ACROSS A DIELECTRIC COOLANT FILLED GAP BETWEEN AN ELECTRODE TOOL AND THE WORKPIECE, COMPRISING A POWER SUPPLY, A PERIODICALLY OPERATED ELECTRONIC SWITCH HAVING A PAIR OF PRINCIPAL ELECTRODES, SAID ELECTRONIC SWITCH HAVING ITS PRINCIPAL ELECTRODES CONNECTED IN SERIES WITH A DIODE AND SAID GAP ACROSS SAID POWER SUPPLY FOR PROVIDING MACHINING POWER PULSES TO SAID GAP, AND A TRANSFORMER OF THE STEP-UP TYPE, SAID TRANSFORMER HAVING ITS PRIMARY WINDING OPERATIVELY CONNECTED ACROSS
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |