US3760636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing and grading of timber
Assignee: MEASURING PROCESS CONTROL Ltd
•
Filing: 1971-11-29
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Granted: 1973-09-25
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Expires: 1991-11-29
Abstract
Abstract A method of testing timber in which a length of timber is bent by applying equal bending couples at two spaced points. The magnitude or directions of each couple is then changed and the change in curvature so produced all along the length between the two points is measured.
Inventors
- 👤 V Serry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/20; G01N33/00; G01N33/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
The method of testing timber which consists in the steps of firstly bending a length of timber by applying equal bending couples at two points spaced along the length, secondly equally altering said bending couples for changing the extent or direction of bending, and thirdly measuring along the whole length of timber between the said points the lateral change in deflection produced by said second step relative to the deflection produced by said first step for determining the change in curvature produced by said equal alteration of the bending couples.
Claim 2
Independent Claim
90 words
The method of testing timber which consists in the steps of firstly bending a length of timber by applying equal bending couples at two points spaced along the length, secondly equally altering said bending couples for changing the extent or direction of bending, and thirdly measuring along the whole length of timber between the said points the lateral change in deflection produced by said second step relative to the deflection produced by said first step for determining the change in curvature produced by said equal alteration of the bending couples.
Claim 3
Dependent Claim
37 words
The method claimed in claim 1, in which at each point the timber is supported on a fixed abutment and a load is applied to the timber adjacent to this point to produce the desired bending couple.
Claim 4
Dependent Claim
33 words
The method claimed in claim 1, in which at each point the timber is supported in a pivoted jaw which is then rotated through the angle required to apply the desired bending couple.
Claim 5
Dependent Claim
35 words
The method claimed in claim 1, in which the bending couples are applied at opposite ends of the length of timber under test whereby to effect a test of the whole piece in one position.
Claim 6
Dependent Claim
42 words
The method claimed in claim 1, in which bending couples are applied successively at spaced pairs of points along the length of timber, the span covered between the points of one pair overlapping the span covered between the points of another pair.
Claim 7
Dependent Claim
27 words
The method claimed in claim 5, in which each pair of points constitutes a separate testing station, the piece of timber being moved laterally between each station.
Claim 8
Dependent Claim
28 words
The method claimed in claim 1, in which the change in deflection is measured by a plurality of sensor arranged at equi-spaced points along the length of timber.
References Cited (Backward Citations)
US2742782A
Cited
US3286516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |