US3117919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric supply system for electrolytic grinding
Assignee: Individual
•
Filing: 1961-02-10
•
Granted: 1964-01-14
•
Expires: 1981-02-10
Abstract
No abstract record available.
Inventors
- 👤 Mittelmann Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:26
CPC Classifications
B; B23; B23H; B23H5/00; B23H5/06; B23H5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN AN ELECTROLYTIC GRINDING SYSTEM HAVING AN ELECTROLYTIC CIRCUIT AND A DIRECT CURRENT SUPPLY CIRCUIT THEREFOR, SAID SUPPLY CIRCUIT HAVING INTERNAL RESISTANCE, AUTOMATIC MEANS FOR PREVENTING SUBSTANTIAL RISE IN VOLTAGE OF SAID DIRECT CURRENT SUPPLY CIRCUIT UNDER CONDITIONS OF REDUCED LOAD IN SAID ELECTROLYTIC CIRCUIT, SECOND AUTOMATIC MEANS COMPRISING AN IMPEDANCE ARRANGEMENT CONNECTED IN SERIES WITH THE ELECTROLYTE IN SAID ELECTROLYTIC CIRCUIT AND SAID WORKPIECE AND ELECTRODE FOR SENSING RESISTANCE CHANGES ACROSS THE ELECROLYTE, AND MEANS CONTROLLED RESPONSIVE TO SAID SENSED CHANGES AND COUPLED TO SAID FIRST AUTOMATIC MEANS FOR REDUCING THE VOLTAGE OF DIRECT CURRENT SUPPLY CIRCUIT IN RESPONSE TO SPARKING IN SAID ELECTROLYTIC CIRCUIT.
Claim 2
Dependent Claim
106 words
IN AN ELECTROLYTIC GRINDING SYSTEM HAVING AN ELECTROLYTIC CIRCUIT AND A DIRECT CURRENT SUPPLY CIRCUIT THEREFOR, SAID SUPPLY CIRCUIT HAVING INTERNAL RESISTANCE, AUTOMATIC MEANS FOR PREVENTING SUBSTANTIAL RISE IN VOLTAGE OF SAID DIRECT CURRENT SUPPLY CIRCUIT UNDER CONDITIONS OF REDUCED LOAD IN SAID ELECTROLYTIC CIRCUIT, SECOND AUTOMATIC MEANS COMPRISING AN IMPEDANCE ARRANGEMENT CONNECTED IN SERIES WITH THE ELECTROLYTE IN SAID ELECTROLYTIC CIRCUIT AND SAID WORKPIECE AND ELECTRODE FOR SENSING RESISTANCE CHANGES ACROSS THE ELECROLYTE, AND MEANS CONTROLLED RESPONSIVE TO SAID SENSED CHANGES AND COUPLED TO SAID FIRST AUTOMATIC MEANS FOR REDUCING THE VOLTAGE OF DIRECT CURRENT SUPPLY CIRCUIT IN RESPONSE TO SPARKING IN SAID ELECTROLYTIC CIRCUIT.
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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) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |