US2834728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for protecting the cathodes of electrolytic cells
Assignee: De Nora SpA
•
Filing: 1954-03-01
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Granted: 1958-05-13
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Gallone Patrizio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:45
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/60; C25B9/65; C25B15/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
THE METHOD OF PROTECTING THE CATHODES OF ELECTROLYTIC CELLS, HAVING ANODES AND MERCURY CATHODE SAID ANODES AND SAID CATHODE BEING OF SUBSTANTIALLY THE SAME SURFACE AREA, A MAIN ELECTROLYSIS CIRCUIT, AND A SOURCE OF POLARIZING CURRENT, WHEN THE CELL IS CUT OUT OF THE MAIN ELECTROLYSIS CURRENT, WHICH COMPRISES DISCONNECTING SAID SOURCE OF POLARIZING CURRENT FROM THE ANODES AND CATHODE OF SAID CELL WHEN THE CELL IS IN THE MAIN ELECTROLYSIS CIRCUIT, AUTOMATICALLY CONNECTING SAID SOURCE OF POLARIZING CURRENT, HAVING A POTENTIAL LOWER THAN THE DECOMPOSIANODES AND THE MERCURY CATHODE OF THE CELL WHEN THE CELL IS CUT OUT OF THE MAIN ELECTROLYSIS CIRCUIT.
Claim 2
Independent Claim
104 words
THE METHOD OF PROTECTING THE CATHODES OF ELECTROLYTIC CELLS, HAVING ANODES AND MERCURY CATHODE SAID ANODES AND SAID CATHODE BEING OF SUBSTANTIALLY THE SAME SURFACE AREA, A MAIN ELECTROLYSIS CIRCUIT, AND A SOURCE OF POLARIZING CURRENT, WHEN THE CELL IS CUT OUT OF THE MAIN ELECTROLYSIS CURRENT, WHICH COMPRISES DISCONNECTING SAID SOURCE OF POLARIZING CURRENT FROM THE ANODES AND CATHODE OF SAID CELL WHEN THE CELL IS IN THE MAIN ELECTROLYSIS CIRCUIT, AUTOMATICALLY CONNECTING SAID SOURCE OF POLARIZING CURRENT, HAVING A POTENTIAL LOWER THAN THE DECOMPOSIANODES AND THE MERCURY CATHODE OF THE CELL WHEN THE CELL IS CUT OUT OF THE MAIN ELECTROLYSIS CIRCUIT.
Claim 3
Dependent Claim
117 words
IN A SWITCHING DEVICE FOR ELECTROLYTIC CELLS COMPRISING FIXED AND MOVABLE CONTACTS, A ROTARY SHAFT, A MOVABLE CONTACT MEMBER FORMED OF A PLURALITY OF SEGMENTS OF A CYLINDER SPACED CLOSELY ADJACENT TO ONE ANOTHER LONGITUDINALLY OF THE AXIS OF SAID HSFT, SPRINGS SPACED ON EACH SIDE OF THE AXIS OF SAID ROTARY SHAFT PRESSING OUTWARDLY AGAINST EACH END OF EACH OF SAID SEGMENTS, MEANS TO LIMIT THE OUTWARD MOVEMENT OF SAID SEGMENTS BY SAID SPRINTS, CONNECTIONS BETWEEN SAID SPRINGS AND SAID SEGMENTS AND THE ROTARY SHAFT WHEREBY ROTARY MOVEMENT OF SAID SHAFT CAUSES ROTARY MOVEMENT OF SAID SEGMENTS PAST SAID FIXED CONTACT MEMBERS, SAID CONNECTIONS ALSO PERMITTING RADICAL TIPPING MOVEMENT OF SAID SEGMENTS RELATIVE TO SAID SHAFT.
Claim 4
Dependent Claim
117 words
IN A SWITCHING DEVICE FOR ELECTROLYTIC CELLS COMPRISING FIXED AND MOVABLE CONTACTS, A ROTARY SHAFT, A MOVABLE CONTACT MEMBER FORMED OF A PLURALITY OF SEGMENTS OF A CYLINDER SPACED CLOSELY ADJACENT TO ONE ANOTHER LONGITUDINALLY OF THE AXIS OF SAID HSFT, SPRINGS SPACED ON EACH SIDE OF THE AXIS OF SAID ROTARY SHAFT PRESSING OUTWARDLY AGAINST EACH END OF EACH OF SAID SEGMENTS, MEANS TO LIMIT THE OUTWARD MOVEMENT OF SAID SEGMENTS BY SAID SPRINTS, CONNECTIONS BETWEEN SAID SPRINGS AND SAID SEGMENTS AND THE ROTARY SHAFT WHEREBY ROTARY MOVEMENT OF SAID SHAFT CAUSES ROTARY MOVEMENT OF SAID SEGMENTS PAST SAID FIXED CONTACT MEMBERS, SAID CONNECTIONS ALSO PERMITTING RADICAL TIPPING MOVEMENT OF SAID SEGMENTS RELATIVE TO SAID SHAFT.
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Cited
GB221036A
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US1554090A
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US1759991A
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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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |