Patent US3229159A successfully refreshed from Google Patents.
US3229159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superimposed high striking voltage circuit
Assignee: Elox Corporation of Michigan
•
Filing: 1960-05-16
•
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 12:28
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.
References Cited (Backward Citations)
US2769078A
Cited
US2763811A
Cited
US2804575A
Cited
US2876386A
Cited
US2901588A
Cited
US2978627A
Cited
US2994013A
Cited
US3052817A
Cited
US2949548A
Cited
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 |