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US4524319A
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US
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Method for the determination of kinetics of structure formation in a binder
Assignee: TERRITORIALNOE GEOLOGISCHESKOE UPRAVENIE TSENTRALNYKH RAIONOV
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Filing: 1982-02-26
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Granted: 1985-06-18
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Expires: 2002-02-26
Abstract
Abstract A method for monitoring structural changes in a binder in contact with a solid object, while the binder is curing. Conductivity measuring pick-ups are placed in the binder mass and at the boundary between the binder and the solid object. A low amplitude AC voltage is applied to each pick-up at a low frequency, and the pick-up output signals are compared by a differential inductive bridge. The difference between the output signals is indicative of the extent of adhesion of the binder to the solid object. Preferably, only those components of the pick-up signals which are in phase with the applied AC voltage are employed for the comparison.
Inventors
- 👤 Igor L. Eberling
- 👤 Lev A. Tereschenko
- 👤 Nikolai I. Nikolaev
- 👤 Arian M. Yakovlev
- 👤 Vitaly I. Kovalenko
- 👤 Nikolai K. Lipatov
- 👤 Ruben A. Tatevosian
- 👤 Mikhail Y. Titov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:14
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/38; G01N33/383; E; E21; E21B; E21B47/00; E21B47/005; G01N27/00; G01N27/02; G01N27/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
A process for monitoring structural changes in a binder having at least one solid object in contact therewith, during curing of the binder, comprising the steps of: immersing a first conductivity monitoring pickup in a zone of said binder at the boundary between the binder and said solid object; immersing a second conductivity monitoring pickup in a zone of said binder remote from said boundary; applying an AC voltage not exeeding 50 mv. to each of said pickups, said voltage having a frequency in the range of about 5 KHz. to about 30 KHz., to cause each pickup to provide an output signal corresponding to the electrical conductivity of the corresponding binder zone; comparing said output signals to provide a differential output signal corresponding to the difference in electrical conductivity of the binder between said zones and indicative of the extent of adhesion of said binder to said solid object; and displaying or recording said differential output signal.
Claim 2
Dependent Claim
158 words
A process for monitoring structural changes in a binder having at least one solid object in contact therewith, during curing of the binder, comprising the steps of: immersing a first conductivity monitoring pickup in a zone of said binder at the boundary between the binder and said solid object; immersing a second conductivity monitoring pickup in a zone of said binder remote from said boundary; applying an AC voltage not exeeding 50 mv. to each of said pickups, said voltage having a frequency in the range of about 5 KHz. to about 30 KHz., to cause each pickup to provide an output signal corresponding to the electrical conductivity of the corresponding binder zone; comparing said output signals to provide a differential output signal corresponding to the difference in electrical conductivity of the binder between said zones and indicative of the extent of adhesion of said binder to said solid object; and displaying or recording said differential output signal.
Claim 3
Dependent Claim
28 words
The process according to claim 1, wherein said comparing step comprises comparing only those components of said pick-up output signals which are in phase with said AC 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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |