Patent US4535775A successfully refreshed from Google Patents.
US4259633A
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Method and apparatus for measuring the moisture content of wood
Assignee: Thomasville Furniture Industries Inc
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Filing: 1978-07-25
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Granted: 1981-03-31
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Expires: 1998-07-25
Abstract
Abstract An improvement in devices for determining the moisture content of lumber by measuring the electrical resistance of the wood. A biasing system is provided so that the voltage supplied to the electrical contacts disposed in the wood may be adjusted. This arrangement allows for corrections to be made in the electrical operation of the device, which corrections compensate for anomalous properties of the wood.
Inventors
- 👤 Clifford M. Rosenau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:02
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A method of determining the wood moisture content of different species of woods comprising the steps of: (a) connecting a source of voltage potential through a set of electrodes across a sample of a particular wood species whose moisture content is to be measured; (b) correcting the voltage potential supplied by said source to compensate for reverse voltage effects inherent in each individual type of wood species being tested, said voltage potential being applied at or above the critical level for the development of reverse voltage effect, which critical level is that voltage potential above which the reverse voltage effect of the wood species remains essentially constant; (c) measuring one or more of the electrical properties of the circuit connected to the source and electrodes; (d) correlating the measured electrical properties of said circuit with wood moisture content.
Claim 2
Independent Claim
138 words
A method of determining the wood moisture content of different species of woods comprising the steps of: (a) connecting a source of voltage potential through a set of electrodes across a sample of a particular wood species whose moisture content is to be measured; (b) correcting the voltage potential supplied by said source to compensate for reverse voltage effects inherent in each individual type of wood species being tested, said voltage potential being applied at or above the critical level for the development of reverse voltage effect, which critical level is that voltage potential above which the reverse voltage effect of the wood species remains essentially constant; (c) measuring one or more of the electrical properties of the circuit connected to the source and electrodes; (d) correlating the measured electrical properties of said circuit with wood moisture content.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |