Patent US4414752A successfully refreshed from Google Patents.
US4414752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the correction of an error in the electric transmission of an indication
Assignee: Individual
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Filing: 1980-08-22
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Granted: 1983-11-15
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Expires: 2000-08-22
Abstract
Abstract To correct latitude-related errors in the delivery of data from a gyrocompass to an indicator through a synchro transmitter with three-phase Y-connected primary and secondary windings, the synchro transmitter is energized from a single-phase a-c source having one terminal connected to one primary winding and the other terminal connected to the two other primary windings with interposition of a variable resistance in series with one of the two latter windings. These two windings may be interchanged to correct errors of opposite sign.
Inventors
- 👤 Piero M. Derossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:21
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/38; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A device for the electrical transmission of an indication, comprising: inductor means with a first, a second and a third winding angularly spaced apart on a shaft in a Y-connection and centered on an axis defined by said shaft, the angular orientation of said inductor means on said shaft representing the indication to be transmitted; a source of single-phase alternating current having two terminals; first circuit means connecting a free end of said first winding to one of said terminals; second circuit means connecting free ends of said second and third windings to the other of said terminals, said second circuit means including selector means for introducing an impedance difference between the connections extending from said other of said terminals to said second and third windings to impart a corrective angle to the orientation of a magnetic field jointly generated by said windings; and pick-up winding means for detecting the orientation of said magnetic field and emitting signals representing said indication as modified by said corrective angle.
Claim 2
Independent Claim
167 words
A device for the electrical transmission of an indication, comprising: inductor means with a first, a second and a third winding angularly spaced apart on a shaft in a Y-connection and centered on an axis defined by said shaft, the angular orientation of said inductor means on said shaft representing the indication to be transmitted; a source of single-phase alternating current having two terminals; first circuit means connecting a free end of said first winding to one of said terminals; second circuit means connecting free ends of said second and third windings to the other of said terminals, said second circuit means including selector means for introducing an impedance difference between the connections extending from said other of said terminals to said second and third windings to impart a corrective angle to the orientation of a magnetic field jointly generated by said windings; and pick-up winding means for detecting the orientation of said magnetic field and emitting signals representing said indication as modified by said corrective angle.
Claim 3
Dependent Claim
27 words
A device as defined in claim 1 wherein said selector means comprises a control member coacting with graduations in terms of a parameter determining said corrective angle.
Claim 4
Independent Claim
168 words
A device for the electrical transmission of the indication of a gyrocompass, comprising: inductor means on a shaft mechanically linked with said gyrocompass for rotation about an axis defined by said shaft, said inductor means including a first, a second and a third winding angularly spaced apart in a Y-connection and centered on said axis; a source of single-phase alternating current having two terminals; first circuit means connecting a free end of said first winding to one of said terminals; second circuit means connecting free ends of said second and third windings to the other of said terminals, said second circuit means including selector means for introducing an impedance difference between the connections extending from said other of said terminals to said second and third windings to impart a corrective angle to the orientation of a magnetic field jointly generated by said windings; and pick-up winding means for detecting the orientation of said magnetic field and emitting signals representing the gyrocompass indication as modified by said corrective angle.
Claim 5
Independent Claim
168 words
A device for the electrical transmission of the indication of a gyrocompass, comprising: inductor means on a shaft mechanically linked with said gyrocompass for rotation about an axis defined by said shaft, said inductor means including a first, a second and a third winding angularly spaced apart in a Y-connection and centered on said axis; a source of single-phase alternating current having two terminals; first circuit means connecting a free end of said first winding to one of said terminals; second circuit means connecting free ends of said second and third windings to the other of said terminals, said second circuit means including selector means for introducing an impedance difference between the connections extending from said other of said terminals to said second and third windings to impart a corrective angle to the orientation of a magnetic field jointly generated by said windings; and pick-up winding means for detecting the orientation of said magnetic field and emitting signals representing the gyrocompass indication as modified by said corrective angle.
Claim 6
Dependent Claim
23 words
A device as defined in claim 3 wherein said selector means comprises a control member coacting with graduations in terms of geographical latitude.
Claim 7
Dependent Claim
48 words
A device as defined in claim 1, 2, 3 or 4 wherein said selector means includes first switch means for choosing among a multiplicity of impedance values and second switch means for introducing the chosen impedance value in series with either one of said second and third windings.
Claim 8
Dependent Claim
29 words
A device as defined in claim 5 wherein said indication is furnished by a gyrocompass, said second switch means having alternate positions for the northern and the southern hemisphere.
Claim 9
Dependent Claim
54 words
A device as defined in claim 1, 2, 3 or 4 wherein said selector means has a multiplicity of settings for choosing among as many different impedance values, further comprising a multiplicity of luminous indicator and energizing means coupled with said selector means for actuating a respective luminous indicator in any of said settings.
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |