US3344255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge machine apparatus
Assignee: —
•
Filing: —
•
Granted: 1967-09-26
•
Expires: 1984-09-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:07
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN ELECTRICAL STOCK REMOVAL APPARATUS, THE COMBINATION OF CONDUCTIVE CUTTING TOOL AND WORKPIECE ELECTRODES SPACED APART SO AS TO FORM AN IONIZABLE GAP THEREBETWEEN, PLURAL PARALLEL CONNECTED POWER SUPPLIES INCLUDING A COMMON ALTERNATING CURRENT SOURCE, EACH POWER SUPPLY HAVING THE OUTPUT THEREOF APPLIED TO THE GAP SO AS TO EFFECT INTERMITTENT ELECTRICAL STOCK REMOVAL DISCHARGES THEREACROSS, MEANS RECTIFYING THE OUTPUTS SO AS TO BE OF THE SAME CERTAIN FREQUENCY AND POLARITY, AND MEANS SELECTIVELY PHASE RELATING THE RECTIFIED OUTPUTS SO THAT FOR ROUGH MACHINING THE OUTPUTS ARE IN PHASE OF THE CERTAIN FREQUENCY AND FOR FINISH MACHINING THE OUTPUTS ARE 180* OUT OF PHASE AND THE FREQUENCY IS DOUBLE THE CERTAIN FREQUENCY.
Claim 2
Dependent Claim
112 words
IN ELECTRICAL STOCK REMOVAL APPARATUS, THE COMBINATION OF CONDUCTIVE CUTTING TOOL AND WORKPIECE ELECTRODES SPACED APART SO AS TO FORM AN IONIZABLE GAP THEREBETWEEN, PLURAL PARALLEL CONNECTED POWER SUPPLIES INCLUDING A COMMON ALTERNATING CURRENT SOURCE, EACH POWER SUPPLY HAVING THE OUTPUT THEREOF APPLIED TO THE GAP SO AS TO EFFECT INTERMITTENT ELECTRICAL STOCK REMOVAL DISCHARGES THEREACROSS, MEANS RECTIFYING THE OUTPUTS SO AS TO BE OF THE SAME CERTAIN FREQUENCY AND POLARITY, AND MEANS SELECTIVELY PHASE RELATING THE RECTIFIED OUTPUTS SO THAT FOR ROUGH MACHINING THE OUTPUTS ARE IN PHASE OF THE CERTAIN FREQUENCY AND FOR FINISH MACHINING THE OUTPUTS ARE 180* OUT OF PHASE AND THE FREQUENCY IS DOUBLE THE CERTAIN FREQUENCY.
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |