Automatic leveling telescope including a reversible two-sided pendulum mirror
Abstract
Abstract A TELESCOPE, PARTICULARLY FOR MEASURING OR SIGHTING AS FOR GEODETIC PURPOSES, COMPRISING A ROTATABLE TUBULAR MEMBER IN AXIAL ALIGNMENT WITH A LIGHT ENTRANCE APERTURE AND HAVING AN OBJECT MOUNTED THEREIN FOR ROTATION THEREWITH, A COLLIMATING MARK FIXED NEAR THE OPTICAL AXIS OF THE OBJECTIVE, A PENDULUM MIRROR FOR AUTOMATIC LEVELING OF THE SIGHTING LINE OF THE TELESCOPE, THE MIRROR HAVING FRONT AND BACK REFLECTING SURFACES AND BEING POSITIONED SO THAT IMAGING RAYS ENTERING THE APERTURE PASS THROUGH THE OBJECTIVE TO THE MIRROR AND ARE REFLECTED THEREFROM BACK TO THE OBJECTIVE, MEANS FOR FOCUSING IMAGING RAYS TRAVERSING THE OBJECTIVE ONTO THE COLLIMATING MARK, AN EYEPIECE FOR VIEWING THE COLLIMATING MARK, AND AN OPTICAL SYSTEM FOR DIRECTING IMAGES REFLECTED FROM THE MIRROR TO THE EYEPIECE.
Inventors
- 👤 Gerhard Huther
Bibliographic Details
Claims Analysis
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |