US4025192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical measuring method
Assignee: Geotronics AB
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Filing: 1975-11-25
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Granted: 1977-05-24
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Expires: 1995-11-25
Abstract
Abstract A method of measuring changes in the location of a physically inaccessible point on a surface is disclosed in which the surface may be moved relative to the measuring point between successive measurements.
Inventors
- 👤 Karl Ragnar Scholdstrom
- 👤 Holger Marcus
- 👤 Lennart Nordstrom
- 👤 Nils Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:00
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/026
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
242 words
A method of making a series of measurements of the relative position of a point on the surface of an object with respect to said object; said point moving with respect to a measuring instrument between said measurements; comprising the steps of: (a) measuring the location of first, second and third non-collinear reference points on said object with respect to said measuring instrument with said object in a first location relative to said measuring instrument; (b) measuring the location of said point on said surface with respect to said measuring instrument with said object in said first location with respect to said measuring instrument; (c) measuring the location of said first, second and third non-collinear reference points on said object with respect to said measuring instrument with said object in a second location with respect to said measuring instrument; (d) calculating the location of said point on said surface with respect to said first, second and third non-collinear reference points; (e) then calculating the location of said point on said surface with respect to said measuring instrument with said object in said second location with respect to said measuring instrument; (f) measuring the location of said point on said surface with respect to said measuring instrument with said object in said second location with respect to said measuring instrument; and (g) determining an estimate of wear of said surface by utilizing the calculation of step (e) and the measurement of step (f).
Claim 2
Independent Claim
242 words
A method of making a series of measurements of the relative position of a point on the surface of an object with respect to said object; said point moving with respect to a measuring instrument between said measurements; comprising the steps of: (a) measuring the location of first, second and third non-collinear reference points on said object with respect to said measuring instrument with said object in a first location relative to said measuring instrument; (b) measuring the location of said point on said surface with respect to said measuring instrument with said object in said first location with respect to said measuring instrument; (c) measuring the location of said first, second and third non-collinear reference points on said object with respect to said measuring instrument with said object in a second location with respect to said measuring instrument; (d) calculating the location of said point on said surface with respect to said first, second and third non-collinear reference points; (e) then calculating the location of said point on said surface with respect to said measuring instrument with said object in said second location with respect to said measuring instrument; (f) measuring the location of said point on said surface with respect to said measuring instrument with said object in said second location with respect to said measuring instrument; and (g) determining an estimate of wear of said surface by utilizing the calculation of step (e) and the measurement of step (f).
Claim 3
Dependent Claim
43 words
A method in accordance with claim 1 wherein said steps of measuring are accomplished by utilizing an electro-optical distance measuring instrument which provides an electrical signal indicative of distance and angular relationship of the point to be measured with respect to the instrument.
Claim 4
Dependent Claim
21 words
The method of claim 2 wherein said step utilizing electro-optical distance measuring equipment includes utilizing a laser electro-optical distance measuring instrument.
Claim 5
Dependent Claim
31 words
The method of claim 2 wherein said calculating and determining steps are accomplished by utilizing a digital computer whose input is connected to the output of said electro-optical distance measuring equipment.
Claim 6
Independent Claim
174 words
A method of determining the wear of a surface of an object at a specified location on the surface utilizing a measuring instrument, said method comprising the steps of: (a) measuring the location of first, second and third non-collinear reference points on said object with respect to said measuring instrument; (b) calculating the aiming angles and distance to a point at the specified location needed for operating said instrument by utilizing the measurements of step (a) and a first wear estimate; (c) measuring the distance to the surface at the specified location along the calculated aiming angles; (d) determining if the measured distance equals the calculated distance; (e) displaying said first wear estimate if the measured and calculated distances are equal as determined in step (d); (f) calculating a new estimate of wear based upon the difference between the measured and calculated distances as determined in step (d) if said distances are not equal; and (g) repeating the above steps beginning with step (b) utilizing said new estimate in place of said first estimate.
Claim 7
Independent Claim
174 words
A method of determining the wear of a surface of an object at a specified location on the surface utilizing a measuring instrument, said method comprising the steps of: (a) measuring the location of first, second and third non-collinear reference points on said object with respect to said measuring instrument; (b) calculating the aiming angles and distance to a point at the specified location needed for operating said instrument by utilizing the measurements of step (a) and a first wear estimate; (c) measuring the distance to the surface at the specified location along the calculated aiming angles; (d) determining if the measured distance equals the calculated distance; (e) displaying said first wear estimate if the measured and calculated distances are equal as determined in step (d); (f) calculating a new estimate of wear based upon the difference between the measured and calculated distances as determined in step (d) if said distances are not equal; and (g) repeating the above steps beginning with step (b) utilizing said new estimate in place of said first estimate.
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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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |