US3652166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geodetic sighting instrument
Assignee: Magyar Optikai Muvek
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Filing: 1970-05-04
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Granted: 1972-03-28
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Expires: 1990-05-04
Abstract
Abstract Geodetic sighting instrument with a gas laser light source and beaming, sighting and observation systems; the optical axis of said gas laser is arranged in a way free to rotate about a vertical axis and perpendicular to the direction of sighting. The instrument has a light reflecting system consisting of directive mirrors to direct the beam used for the marking of direction, a sighting reflecting device being interposed between said gas laser and said observation system including at least one reflecting device free to rotate about an axis perpendicular to the direction to be marked out.
Inventors
- 👤 Dezso Bessko
- 👤 Gyula Gallai
- 👤 Pal Farnady
- 👤 Geza Jozsa
- 👤 Margit Kovy
- 👤 Laszlo Teller
- 👤 Andras Suba
- 👤 Sandor Tisza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:59
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; G; G01; G01C; G01C15/00; G01C15/002; G01C5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A device for establishing a sight line in a predetermined desired direction, said device comprising a support, a geodetic sighting instrument mounted on said support, said instrument comprising a gas laser light source, a beaming system for receiving light from the laser light source and forwarding it as an expanded, collimated laser beam, a sighting system for receiving the beam of laser light and emitting it in a line outwardly of the instrument, and an observation system for observing target impingement of the emitted laser beam, the support and the instrument carried thereby being rotatable about a vertical axis, a first reflecting system to direct the laser light from the laser source to the beaming system, said sighting system comprising a second reflecting system including at least one reflecting means free to rotate about an axis perpendicular to said vertical axis and to the direction of the emitted laser beam, whereby the emitted laser beam can be directed in any desired direction to establish said sight line.
Claim 2
Independent Claim
167 words
A device for establishing a sight line in a predetermined desired direction, said device comprising a support, a geodetic sighting instrument mounted on said support, said instrument comprising a gas laser light source, a beaming system for receiving light from the laser light source and forwarding it as an expanded, collimated laser beam, a sighting system for receiving the beam of laser light and emitting it in a line outwardly of the instrument, and an observation system for observing target impingement of the emitted laser beam, the support and the instrument carried thereby being rotatable about a vertical axis, a first reflecting system to direct the laser light from the laser source to the beaming system, said sighting system comprising a second reflecting system including at least one reflecting means free to rotate about an axis perpendicular to said vertical axis and to the direction of the emitted laser beam, whereby the emitted laser beam can be directed in any desired direction to establish said sight line.
Claim 3
Dependent Claim
44 words
A device as claimed in claim 1, wherein the observation system comprises at least one reflecting means free to rotate about an axis common with that of the reflecting means of the second reflecting system, a telescope coaxial with said axis, and a prism.
Claim 4
Dependent Claim
24 words
A device as claimed in claim 2, further comprising a levelling (or angle measuring) system rotating together with the sighting and observation reflecting means.
Claim 5
Dependent Claim
69 words
A device as claimed in claim 1, wherein the gas laser has a resonator comprising mirrors set in mirror holders by means of sealing elements made of resilient material, an enclosure for the gas laser made of material having a thermal coefficient of expansion not more than 3 X 10 6/*C., said enclosure having end plates, saId mirror holders being adjustably fastened to the end plates of the enclosure.
Claim 6
Dependent Claim
55 words
A device as claimed in claim 1, further comprising an operation transverter connected to one of the electrodes and to the ground terminal of said gas laser, and another, starting transverter connected to the other electrode and the ground terminal of said gas laser, and a diode bridging the output terminals of the starting transverter.
Claim 7
Dependent Claim
23 words
A device as claimed in claim 5, wherein the operation frequency of said starting and operation transverters is not less than 20 kHz.
Claim 8
Dependent Claim
17 words
A device as claimed in claim 1, further comprising a laser supply unit integral with the instrument.
Claim 9
Dependent Claim
16 words
A device as claimed in claim 1, further comprising a current source integral with the instrument.
Claim 10
Dependent Claim
17 words
A device as claimed in claim 8, further comprising a laser supply unit integral with the instrument.
Claim 11
Dependent Claim
22 words
A device as claimed in claim 2, further comprising an angle measuring system rotating together with the sighting and observation reflecting means.
References Cited (Backward Citations)
US3321248A
Cited
US3533700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |