US3887452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optimum electroplating plant control device
Assignee: Hitachi Ltd
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Filing: 1972-10-31
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Granted: 1975-06-03
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Expires: 1992-10-31
Abstract
Abstract A control device provided with a memory for determining and memorizing a critical breakdown temperature of the component elements of the control device in order to use them to the best advantage in, say, a galvanizing process, thereby to control the output current of the control device in accordance with the difference between the critical breakdown temperature and an actually detected temperature of the component elements.
Inventors
- 👤 Toshio Mannaka
- 👤 Hidehiro Kitanosono
- 👤 Shigemichi Matsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:19
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/12; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
An optimum control system for regulating the plating current in and speed of a plating line, said system comprising speed control means for controlling the speed of said plating line, said speed control means including speed detection means for detecting the speed of said plating line, current control means for controlling the plating current of said plating line, said current control means including current detection means for detecting the plating current of said plating line, temperature detection means for detecting the temperature of said current control means, and system control means responsive to said detected speed, current and temperature for continuously regulating said speed control means and said current control means in accordance with a predetermined relationship based on the speed, current and temperature of said plating line, whereby the plating current of said plating line is continuously maintained at a level such that the temperature of said current control means is kept immediately below the critical breakdown temperature of said current control means.
Claim 2
Dependent Claim
164 words
An optimum control system for regulating the plating current in and speed of a plating line, said system comprising speed control means for controlling the speed of said plating line, said speed control means including speed detection means for detecting the speed of said plating line, current control means for controlling the plating current of said plating line, said current control means including current detection means for detecting the plating current of said plating line, temperature detection means for detecting the temperature of said current control means, and system control means responsive to said detected speed, current and temperature for continuously regulating said speed control means and said current control means in accordance with a predetermined relationship based on the speed, current and temperature of said plating line, whereby the plating current of said plating line is continuously maintained at a level such that the temperature of said current control means is kept immediately below the critical breakdown temperature of said current control means.
Claim 3
Dependent Claim
164 words
An optimum control system for regulating the plating current in and speed of a plating line, said system comprising speed control means for controlling the speed of said plating line, said speed control means including speed detection means for detecting the speed of said plating line, current control means for controlling the plating current of said plating line, said current control means including current detection means for detecting the plating current of said plating line, temperature detection means for detecting the temperature of said current control means, and system control means responsive to said detected speed, current and temperature for continuously regulating said speed control means and said current control means in accordance with a predetermined relationship based on the speed, current and temperature of said plating line, whereby the plating current of said plating line is continuously maintained at a level such that the temperature of said current control means is kept immediately below the critical breakdown temperature of said current control means.
Claim 4
Dependent Claim
164 words
An optimum control system for regulating the plating current in and speed of a plating line, said system comprising speed control means for controlling the speed of said plating line, said speed control means including speed detection means for detecting the speed of said plating line, current control means for controlling the plating current of said plating line, said current control means including current detection means for detecting the plating current of said plating line, temperature detection means for detecting the temperature of said current control means, and system control means responsive to said detected speed, current and temperature for continuously regulating said speed control means and said current control means in accordance with a predetermined relationship based on the speed, current and temperature of said plating line, whereby the plating current of said plating line is continuously maintained at a level such that the temperature of said current control means is kept immediately below the critical breakdown temperature of said current control means.
Claim 5
Dependent Claim
22 words
An optimum control system as claimed in claim 1 wherein said current control means includes thyristor means for controlling said plating current.
Claim 6
Dependent Claim
30 words
An optimum control system as claimed in claim 2 wherein said thyristor means includes a thyristor and said temperature detection means includes means for detecting the temperature of said thyristor.
Claim 7
Dependent Claim
26 words
An optimum control system as claimed in claim 3 wherein said tempeRature detection means further includes means for detecting the ambient temperature of said plating line.
Claim 8
Dependent Claim
51 words
An optimum control system as claimed in claim 1 wherein said system control means includes a memory unit for storing the critical breakdown temperature of said current control means, and an arithmetic unit for determining the difference between the temperature of said current control means and said stored critical breakdown temperature.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |