US3063929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control device for electrolytic cells
Assignee: Howard Wall Ltd
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Filing: 1959-02-06
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Granted: 1962-11-13
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Expires: 1979-02-06
Abstract
No abstract record available.
Inventors
- 👤 Phelan Terence Kieran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:29
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
CONTROL DEVICE FOR AN ELECTROPLATING BATH COMPRISING MEANS FOR VARYING THE POTENTIAL DIFFERENCE ACROSS THE TERMINALS OF THE BATH, AND ELECTRICAL DEVICE OF THE TYPE THAT WHEN TWO INPUT POTENTIAL DIFFERENCES ARE APPLIED TO IT IN AN APPROPRIATE MANNER, GIVES AN OUTPUT THAT IS A FUNCTION OF THE QUOTIENT OF THE TWO INPUTS, MEANS FOR APPLYING A POTENTIAL DIFFERENCE PROPORTIONAL TO THE VOLTAGE ACROSS THE TERMINALS OF THE BATH AND A POTENTIAL DIFFERENCE PROPORTIONAL TO THE CURRENT THROUGH THE BATH AS INPUTS TO THE SAID ELECTRICAL DEVICE IN SUCH A MANNER THAT THE OUTPUT OF THE SAID ELECTRICAL DEVICE WILL BE PROPORTIONAL TO THE QUOTIENT OF THE TWO INPUTS, A COMPARATOR CIRCUIT CONSTRUCTED AND ARRANGED TO COMPARE THE OUTPUT OF THE SAID ELECTRCAL DEVICE WITH A POTENTIAL DIFFERENCE PROPORTIONAL TO THE POTENTIAL DIFFERENCE ACROSS THE TERMINALS OF THE BATH, AND A SERVO MECHANISM OPERATED BY THE COMPARATOR CIRCUIT, THE SERVO MECHANISM BEING CONSTRUCTED AND ARRANGED TO OPERATE THE MEANS FOR VARYING THE POTENTIAL DIFFERENCE ACROSS THE BATH IN SUCH A MANNER THAT THE DIFFERENCE BETWEEN THE OUTPUT OF THE ELECTRICAL DEVICE AND SAID POTENTIAL DIFFERENCE PROPORTIONAL TO THAT ACROSS THE BATH AS MEASURED BY THE COMPARATOR CIRCUIT IS KEPT AT A CONSTANT PREDETERMINED VALUE.
Claim 2
Dependent Claim
204 words
CONTROL DEVICE FOR AN ELECTROPLATING BATH COMPRISING MEANS FOR VARYING THE POTENTIAL DIFFERENCE ACROSS THE TERMINALS OF THE BATH, AND ELECTRICAL DEVICE OF THE TYPE THAT WHEN TWO INPUT POTENTIAL DIFFERENCES ARE APPLIED TO IT IN AN APPROPRIATE MANNER, GIVES AN OUTPUT THAT IS A FUNCTION OF THE QUOTIENT OF THE TWO INPUTS, MEANS FOR APPLYING A POTENTIAL DIFFERENCE PROPORTIONAL TO THE VOLTAGE ACROSS THE TERMINALS OF THE BATH AND A POTENTIAL DIFFERENCE PROPORTIONAL TO THE CURRENT THROUGH THE BATH AS INPUTS TO THE SAID ELECTRICAL DEVICE IN SUCH A MANNER THAT THE OUTPUT OF THE SAID ELECTRICAL DEVICE WILL BE PROPORTIONAL TO THE QUOTIENT OF THE TWO INPUTS, A COMPARATOR CIRCUIT CONSTRUCTED AND ARRANGED TO COMPARE THE OUTPUT OF THE SAID ELECTRCAL DEVICE WITH A POTENTIAL DIFFERENCE PROPORTIONAL TO THE POTENTIAL DIFFERENCE ACROSS THE TERMINALS OF THE BATH, AND A SERVO MECHANISM OPERATED BY THE COMPARATOR CIRCUIT, THE SERVO MECHANISM BEING CONSTRUCTED AND ARRANGED TO OPERATE THE MEANS FOR VARYING THE POTENTIAL DIFFERENCE ACROSS THE BATH IN SUCH A MANNER THAT THE DIFFERENCE BETWEEN THE OUTPUT OF THE ELECTRICAL DEVICE AND SAID POTENTIAL DIFFERENCE PROPORTIONAL TO THAT ACROSS THE BATH AS MEASURED BY THE COMPARATOR CIRCUIT IS KEPT AT A CONSTANT PREDETERMINED VALUE.
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) | 1965-11-12 | 1966-05-14 | 1966-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-12 | 1970-05-14 | 1970-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-12 | 1974-05-14 | 1974-11-13 | $7700.00 | Window Closed / Lapsed |