Patent US3768015A successfully refreshed from Google Patents.
US3768015A
Expired / Lapsed
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Electrolytic timing cell
Assignee: Catalyst Research Corp
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Filing: 1971-11-15
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Granted: 1973-10-23
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Expires: 1991-11-15
Abstract
Abstract An electrolytic timing cell utilizing three electrodes, one of which contains a very specific quantity of a plateable metal, the second of which acts as a dummy electrode through which current is passed causing a reduction of metal ions, and the third of which is a reference electrode in contact with the electrolyte and which acts as a stable voltage reference. An output signal indicative of the end of a timing period is derived between the first and third electrodes. The reference electrode stabilizes the timing circuit voltage so that a voltage change occurs only at the end of the timing sequence.
Inventors
- 👤 J Moser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:40
CPC Classifications
G; G04; G04F; G04F10/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
An electrolytic timing cell comprising a container, an electrolyte disposed within said container, first and second electrodes disposed within said electrolyte, the first of said electrodes being formed from a metal which does not easily oxidize and having a plating of an oxidizable metal thereon, means for establishing a potential between said electrodes to cause the plated metal on said first electrode to go into solution in the electrolyte as ions and become plated on the second electrode, a third electrode in electrical contact with said electrolyte, and means connected between said third and first electrodes for producing an electrical signal when all of the metal plated on said one electrode has been removed therefrom.
Claim 2
Dependent Claim
115 words
An electrolytic timing cell comprising a container, an electrolyte disposed within said container, first and second electrodes disposed within said electrolyte, the first of said electrodes being formed from a metal which does not easily oxidize and having a plating of an oxidizable metal thereon, means for establishing a potential between said electrodes to cause the plated metal on said first electrode to go into solution in the electrolyte as ions and become plated on the second electrode, a third electrode in electrical contact with said electrolyte, and means connected between said third and first electrodes for producing an electrical signal when all of the metal plated on said one electrode has been removed therefrom.
Claim 3
Dependent Claim
19 words
The timing cell of claim 1 in which the third electrode is positioned between the first and second electrodes.
Claim 4
Dependent Claim
21 words
The timing cell of claim 2 in which the third electrode is of the same metal as the oxidizable metal plating.
Claim 5
Dependent Claim
37 words
The timing cell of claim 1 wherein said container is formed from a metal to which said third electrode is connected, and means for insulating said container and said third electrode from said first and second electrodes.
Claim 6
Dependent Claim
21 words
The timing cell of claim 1 wherein said container is formed from dielectric material and said electrodes extend into the container.
Claim 7
Dependent Claim
18 words
The timing cell of claim 5 wherEin said electrodes are insulated one from the other by rubber spacers.
Claim 8
Dependent Claim
18 words
The timing cell of claim 3 wherein said electrodes are insulated one from the other by polypropylene wool.
Claim 9
Dependent Claim
25 words
The timing cell of claim 1 wherein said first and third electrodes are connected to the gate and source electrodes of a field effect transistor.
Claim 10
Dependent Claim
18 words
The timing cell of claim 1 including a constant current source connected to said first and second electrodes.
Claim 11
Dependent Claim
37 words
The timing cell of claim 9 including a plurality of impedance elements adapted to be connected across said first and second electrodes, and switch means for selectively connecting said impedance elements across said first and second electrodes.
References Cited (Backward Citations)
US3428894A
Cited
US3679945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |