Patent US3597092A successfully refreshed from Google Patents.
US3597092A
Expired / Lapsed
US
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Instrument for measuring a projected distance
Assignee: Geotronics AB
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Filing: 1969-09-26
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Granted: 1971-08-03
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Expires: 1989-09-26
Abstract
Abstract For measuring the projected distance between a pair of points, an optical lens system is arranged with its optical axis parallel to the direction of projection. The axis is deflected in opposite directions towards a pair of deflectors causing perpendicular deflections into directions parallel to the axis. The spacing between the deflectors is adjustable and can be read off from a scale. The lens system is adjustable parallel to the adjustment of the deflectors.
Inventors
- 👤 Erik Niss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:58
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/14; G01B11/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
An instrument for measuring the projected distance between a pair of points, comprising: a lens system having its optical axis parallel to a predetermined direction of projection, primary deflecting means for deflecting said optical axis in opposite directions perpendicular to said optical axis, a pair of secondary deflecting means for perpendicularly deflecting said opposite directions back to said predetermined direction, means for adjusting the spacing of said secondary deflecting means, a scale for reading off said spacing, means for adjusting the back focal length of said lens system, and coupling means connected between said focal-length-adjusting means and said spacing-adjusing means.
Claim 2
Dependent Claim
100 words
An instrument for measuring the projected distance between a pair of points, comprising: a lens system having its optical axis parallel to a predetermined direction of projection, primary deflecting means for deflecting said optical axis in opposite directions perpendicular to said optical axis, a pair of secondary deflecting means for perpendicularly deflecting said opposite directions back to said predetermined direction, means for adjusting the spacing of said secondary deflecting means, a scale for reading off said spacing, means for adjusting the back focal length of said lens system, and coupling means connected between said focal-length-adjusting means and said spacing-adjusing means.
Claim 3
Dependent Claim
27 words
An instrument according to claim 1, in which said spacing-adjusting means comprises a carriage supporting one of said secondary deflecting means and movable in said opposite directions.
Claim 4
Dependent Claim
30 words
An instrument according to claim 1, in which said lens system is adjustable in a direction parallel to the direction of adjustment of the spacing of said secondary deflecting means.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |