US4352556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector for electrooptical distance measurement
Assignee: Leica Aarau AG
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Filing: 1980-03-19
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Granted: 1982-10-05
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Expires: 2000-03-19
Abstract
Abstract A reflector for electrooptical measurement of the distance between a first (3) and a second point (4) is arranged with a right angle sighting device (13) in a common case (8). The reflector (6) may thus be set up at a point (5) where the directions to the first (3) and second points (4) form a right angle. This facilitates the distance measurement between points (3, 4) that are not suited for the set up of reflectors or where visual contact between the points (3, 4) is impaired by an obstacle (1).
Inventors
- 👤 Erwin Haefliger
- 👤 Fritz Hinden
- 👤 Aldo Lardelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:37
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/02; G02; G02B; G02B7/00; G02B7/18; G02B7/182
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
A reflector for electrooptical measurement of the distance between a first and a second point in cooperation with a master station at the first point with: a right angle sighting device near to the reflector (6); means for arranging the right angle sighting device (13) with the reflector (6) at a distance from the second point (4) for concurrent observation of markers (20, 18) both at the first (3) and second points (4), the directions of the markers with respect to a reference point (19) at the reflector (6) forming a right angle only if the marker images (20, 18), as observed, are coincident; a triple mirror (7) tiltable around a horizontal axis (11) for reflecting the measurement beam back to the first point (3) and a pentaprism (13) near to the triple mirror (7) for sighting the marker (18) at the second point (4) at a right angle when the marker (20) at the first point (3) near the master station (2) is observed in a straight line along the side of the pentaprism (13); comprising further a case (8) with an opening (9,10) at each side around the horizontal axis and a holder (12) for the pentaprism that may be inserted into each one of the openings (9, 10) as required.
Claim 2
Dependent Claim
213 words
A reflector for electrooptical measurement of the distance between a first and a second point in cooperation with a master station at the first point with: a right angle sighting device near to the reflector (6); means for arranging the right angle sighting device (13) with the reflector (6) at a distance from the second point (4) for concurrent observation of markers (20, 18) both at the first (3) and second points (4), the directions of the markers with respect to a reference point (19) at the reflector (6) forming a right angle only if the marker images (20, 18), as observed, are coincident; a triple mirror (7) tiltable around a horizontal axis (11) for reflecting the measurement beam back to the first point (3) and a pentaprism (13) near to the triple mirror (7) for sighting the marker (18) at the second point (4) at a right angle when the marker (20) at the first point (3) near the master station (2) is observed in a straight line along the side of the pentaprism (13); comprising further a case (8) with an opening (9,10) at each side around the horizontal axis and a holder (12) for the pentaprism that may be inserted into each one of the openings (9, 10) as required.
Claim 3
Dependent Claim
26 words
A reflector as claimed in claim 1, comprising a holder (12) and a case (8) with side openings (9, 10) each configured with a bayonet joint.
Claim 4
Dependent Claim
24 words
A reflector as claimed in claim 1, comprising means for arranging the pentaprism with the triple mirror to be tilted independently of each other.
Claim 5
Dependent Claim
32 words
A reflector as claimed in claim 1, comprising a right angle sighting device (13) with a holder (12) having apertures (12', 12") within its rim for sighting at the markers (20, 18).
Claim 6
Dependent Claim
31 words
A reflector as claimed in claim 4, wherein the apertures (12', 12") within the rim of the holder (12) allow the reflector (6) to be aimed at the first point (3).
References Cited (Backward Citations)
US3348448A
Cited
US3758212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |