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Patent US3669868A successfully refreshed from Google Patents.
US3669868A
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US
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Layer thickness indicating device for electrolytically deposited materials
Assignee: Fernsteuergeraete Kurt Oelsch GmbH
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Filing: 1970-07-30
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Granted: 1972-06-13
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Expires: 1990-07-30
Abstract
Abstract A device for indicating the thickness of a layer of material deposited in an electrolytic bath. In the device, the output signal from a constant voltage source is fed to a voltage proportioning circuit wherein the input voltage is proportioned according to the current density and efficiency of the electrolytic bath and for the deposition equivalent and the specific weight of the particular material to be deposited in the electrolytic bath. The thus proportioned voltage signal is then integrated with respect to time and an indication of the integrated value provided as a continuous measure of the thickness of the layer of material being deposited in the electrolytic bath.
Inventors
- 👤 Hans-Wilhelm Lieber
- 👤 Rolf Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:33
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
The device as defined in claim 1 including means for causing indication by said indicating means to be initiated at the instant the deposition of the material in the electrolytic bath is initiated.
Claim 2
Dependent Claim
15 words
The device as defined in claim 1 wherein said integrating means is a measuring motor.
Claim 3
Dependent Claim
43 words
The device as defined in claim 3 wherein said indicating means has a pointer for continuously indicating the instantaneous thickness of the layer of material deposited and a movable marker which is set at the desired thickness of the layer of deposited material.
Claim 4
Dependent Claim
60 words
The device as defined in claim 1 wherein said indicating means includes a pulse generator coupled to the output of said integrating means for producing pulses proportional to the output signal from said integrating means, and a digital counter connected to the output of said generator for providing an indication of the number of pulses produced by said pulse generator.
Claim 5
Dependent Claim
28 words
A device as defined in claim 1 wherein said indicating means includes meaNs for providing a signal whenever a desired layer thickness of deposited material has been reached.
Claim 6
Dependent Claim
40 words
A device as defined in claim 1 wherein said first potentiometer is a motor driven potentiometer whose sliding contact is automatically positioned in accordance with an output signal from a means for regulating the current density of the electrolytic bath.
Claim 7
Dependent Claim
30 words
A device as defined in claim 1 wherein said first potentiometer, said second potentiometer and said voltage divider are connected in cascade one to the next in a selected sequence.
Claim 8
Dependent Claim
158 words
A device as defined in claim 8 wherein said first potentiometer has a first end, a second end and its sliding contact defines an intermediate point between its ends; said second potentiometer has a first end, a second end and its sliding contact defines an intermediate point between its ends; said voltage divider has a first end, a second end and an intermediate point between its ends; said first ends are connected together and to a point of reference voltage; one of said second ends is connected to said constant voltage source; a second one of said second ends is connected to a first one of said intermediate points; a third one of said second ends is connected to a second one of said intermediate points; and a third one of said intermediate points is connected to one terminal of said integrating means, the other terminal of said integrating means being connected to said point of reference voltage.
Claim 9
Dependent Claim
135 words
A device as defined in claim 8 wherein said first potentiometer has a first end and a second end; said second potentiometer has a first end and a second end; said voltage divider has a first end, a second end and an intermediate point between its ends; said first ends are connected together and to a point of reference voltage; said second end of said potentiometer is connected to said constant voltage source; said second end of said voltage divider is connected to said sliding contact of said first potentiometer; said second end of said second potentiometer is connected to said intermediate point; and said sliding contact of said second potentiometer is connected to one terminal of said integrating means, the other terminal of said integrating means being connected to said point of reference voltage.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |