Patent US3552834A successfully refreshed from Google Patents.
US3552834A
Expired / Lapsed
US
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Optical instrument for measuring or controlling angular positions
Assignee: Jungner Instrument AB
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Filing: 1967-05-08
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Granted: 1971-01-05
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Expires: 1987-05-08
Abstract
Abstract THE OPTICAL INSTRUMENT OF THE PRESENT INVENTION IS UTILIZED FOR MEASURING OR SETTING ANGULAR POSITIONS. THE OPTICAL SYSTEM IS DISPOSED INSIDE A TUBE WHICH IS ROTATABLY MOUNTED IN A STATIONARY CASING IN SUCH A MANNER THAT THE OPTICAL RADIATION PASSES THROUGH THE TUBE. THE ROTOR OF A SYNCHRO IS SUPPORTED ON THE TUBE AND THE STATOR OF THE SYNCHRO IS SUPPORTED ON THE CASING. THE ROTOR CAN BE PROVIDED WITH SLIP RINGS TO SUPPLY ELECTRICAL CURRENT TO THE ROTOR WINDING, OR THE TUBE CAN BE MANUFACTURED FROM A MAGNETIC MATERIAL PART OF WHICH IS FORMED AS A ROTOR. A MULTI-POLE SYNCHO CAN BE COMBINED WITH A SINGLE-POLE SYNCHRO IN ORDER TO PROVIDE A COARSE-FINE SIGNAL.
Inventors
- 👤 Georg Vogl
- 👤 Bo Hogstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
G; G01; G01C; G01C1/00; G01C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |