US3277338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leading edge delay per pulse cut-off circuitry for electrical discharge machining apparatus
Assignee: Elox Corporation of Michigan
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Filing: 1961-05-26
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Granted: 1966-10-04
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Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert S Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:16
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY MEANS OF INTERMITTENT ELECTRICAL DISCHARGE ACROSS A DIELECTRIC COOLANT FILLED GAP BETWEEN A PAIR OF OPPOSITELY CHARGED ELECTRODES COMPRISING AN ELECTRODE TOOL AND THE WORKPIECE INCLUDING A SOURCE OF MACHINING POWER, AN ELECTRONIC SWITCH OPERATIVELY CONNECTED TO SAID SOURCE AND SAID GAP, A PULSER OPERATIVELY CONNECTED TO SAID SWITCH FOR RENDERING IT ALTERNATELY CONDUCTIVE AND NONCONDUCITVE TO PROVIDE DISCHARGE ACROSS SAID GAP, A CUT-OFF MEANS OPERATIVELY CONNECTED TO SAID PULSER OPERABLE TO TRIGGER IT TO RENDER SAID SWITCH INSTANTLY NONCONDUCTIVE IN RESPONSE TO A DISCHARGE OF ABNORMAL CHARACTERISTIC INCLUDING A ONESHOT MULTIVIBRATOR, AND MEANS FOR TRIGGERING SAID MULTIVIBRATOR FROM ITS NORMAL STATE IN RESPONSE TO SAID CHARACTERISTIC.
Claim 2
Dependent Claim
114 words
APPARATUS FOR MACHINING A CONDUCTIVE WORKPIECE BY MEANS OF INTERMITTENT ELECTRICAL DISCHARGE ACROSS A DIELECTRIC COOLANT FILLED GAP BETWEEN A PAIR OF OPPOSITELY CHARGED ELECTRODES COMPRISING AN ELECTRODE TOOL AND THE WORKPIECE INCLUDING A SOURCE OF MACHINING POWER, AN ELECTRONIC SWITCH OPERATIVELY CONNECTED TO SAID SOURCE AND SAID GAP, A PULSER OPERATIVELY CONNECTED TO SAID SWITCH FOR RENDERING IT ALTERNATELY CONDUCTIVE AND NONCONDUCITVE TO PROVIDE DISCHARGE ACROSS SAID GAP, A CUT-OFF MEANS OPERATIVELY CONNECTED TO SAID PULSER OPERABLE TO TRIGGER IT TO RENDER SAID SWITCH INSTANTLY NONCONDUCTIVE IN RESPONSE TO A DISCHARGE OF ABNORMAL CHARACTERISTIC INCLUDING A ONESHOT MULTIVIBRATOR, AND MEANS FOR TRIGGERING SAID MULTIVIBRATOR FROM ITS NORMAL STATE IN RESPONSE TO SAID CHARACTERISTIC.
References Cited (Backward Citations)
US2951969A
Cited
US3018411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |