US3229159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superimposed high striking voltage circuit
Assignee: Elox Corporation of Michigan
•
Filing: 1960-05-16
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Granted: 1966-01-11
•
Expires: 1980-05-16
Abstract
No abstract record available.
Inventors
- 👤 Robert S Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:02
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN AN ELECTRICAL DISCHARGE MACHINING APPARATUS FOR ERODING A CONDUCTIVE WORKPIECE BY INTERMITTENT ELECTRICAL DISCHARGE ACROSS A GAP BETWEEN AN ELECTRODE AND A WORKPIECE IN THE PRESENCE OF A DIELECTRIC COOLANT, A SOURCE OF MACHINING VOLTAGE COMPRISING AN IMPEDANCE MATCHING TRANSFORMER HAVING ITS PRIMARY CONNECTED TO A POWER SOURCE AND ITS SECONDARY CONNECTED ACROSS SAID GAP, A CONDENSER CONNECTING IN SERIES WITH SAID SECONDARY AND SAID GAP, A ONE-WAY CURRENT CONDUCTING DEVICE CONNECTED ACROSS SAID CONDENSER, AND A NON-WAY CURRENT CONDUCTING DEVICE CONNECTED ACROSS SAID GAP, WHEREBY THE FLYBACK VOLTAGE BETWEEN GAP DISCHARGES IS STORED ACROSS THE CONDENSER AND IS EFFECTIVE TO IONIZE THE GAP TO INITIATE THE FOLLOWING DISCHARGE.
Claim 2
Dependent Claim
110 words
IN AN ELECTRICAL DISCHARGE MACHINING APPARATUS FOR ERODING A CONDUCTIVE WORKPIECE BY INTERMITTENT ELECTRICAL DISCHARGE ACROSS A GAP BETWEEN AN ELECTRODE AND A WORKPIECE IN THE PRESENCE OF A DIELECTRIC COOLANT, A SOURCE OF MACHINING VOLTAGE COMPRISING AN IMPEDANCE MATCHING TRANSFORMER HAVING ITS PRIMARY CONNECTED TO A POWER SOURCE AND ITS SECONDARY CONNECTED ACROSS SAID GAP, A CONDENSER CONNECTING IN SERIES WITH SAID SECONDARY AND SAID GAP, A ONE-WAY CURRENT CONDUCTING DEVICE CONNECTED ACROSS SAID CONDENSER, AND A NON-WAY CURRENT CONDUCTING DEVICE CONNECTED ACROSS SAID GAP, WHEREBY THE FLYBACK VOLTAGE BETWEEN GAP DISCHARGES IS STORED ACROSS THE CONDENSER AND IS EFFECTIVE TO IONIZE THE GAP TO INITIATE THE FOLLOWING DISCHARGE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |