Patent US3405221A successfully refreshed from Google Patents.
US3405221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction and rate of turn reference system
Assignee: HARRY L NELSON
•
Filing: 1963-08-12
•
Granted: 1968-10-08
•
Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Harry L Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:03
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/16; G01; G01C; G01C23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A DIRECTION AND RATE OF TURN REFERENCE SYSTEM COMPRISING: (A) A DIRECTION INDICATING COMPASS COMPRISING: (1) A COMPASS ROSE ELEMENT OF CIRCULAR CONFIGURATION AND BEING ANGULARLY CALIBRATED ABOUT ITS PERIPHERY, (2) AN INDEX MARKER ELEMENT POSITIONED WITH RESPECT TO SAID COMPASS ROSE ELEMENT TO DESIGNATE PARTICULAR ANGULAR DESIGNATIONS ON SAID COMPASS ROSE ELEMENT AS A FUNCTION OF ORIENTATION OF SAID COMPASS, AND (3) ONE OF THE TWO SAID ELEMENTS, SAID COMPASS ROSE ELEMENT OR SAID INDEX MARKER ELEMENT, BEING MOVABLE WITH RESPECT TO THE OTHER TO ACCOMPLISH AN INDICATED CHANGE OF INDICATION UPON CHANGE OF ORIENTATION OF SAID COMPASS; (B) A RATE OF TURN DIRECTING MEANS INCLUDING AN INDICATOR CORRESPONDING TO THE MOVABLE ELEMENT OF SAID ELEMENTS OF SAID COMPASS AND SAID INDICATOR BEING POSITIONED IN CONCENTRIC ALIGNMENT WITH THE MOVABLE SAID ELEMENT TO DISPLAY AN ALIGNED PRESENTATION WITH SAID MOVABLE SAID ELEMENT WHEN THE MOVABLE SAID ELEMENT AND SAID INDICATOR ARE MOVED IN POSITION ABOUT THEIR AXIS AT THE SAME RATE OF ROTATION; AND (C) ROTATIONAL DRIVING MEANS COUPLED TO SAID DIRECTING MEANS FOR ROTATING SAID INDICATOR IN EITHER DIRECTION OF ROTATION AND AT A SELECTED RATE OF ROTATION.
Claim 2
Dependent Claim
190 words
A DIRECTION AND RATE OF TURN REFERENCE SYSTEM COMPRISING: (A) A DIRECTION INDICATING COMPASS COMPRISING: (1) A COMPASS ROSE ELEMENT OF CIRCULAR CONFIGURATION AND BEING ANGULARLY CALIBRATED ABOUT ITS PERIPHERY, (2) AN INDEX MARKER ELEMENT POSITIONED WITH RESPECT TO SAID COMPASS ROSE ELEMENT TO DESIGNATE PARTICULAR ANGULAR DESIGNATIONS ON SAID COMPASS ROSE ELEMENT AS A FUNCTION OF ORIENTATION OF SAID COMPASS, AND (3) ONE OF THE TWO SAID ELEMENTS, SAID COMPASS ROSE ELEMENT OR SAID INDEX MARKER ELEMENT, BEING MOVABLE WITH RESPECT TO THE OTHER TO ACCOMPLISH AN INDICATED CHANGE OF INDICATION UPON CHANGE OF ORIENTATION OF SAID COMPASS; (B) A RATE OF TURN DIRECTING MEANS INCLUDING AN INDICATOR CORRESPONDING TO THE MOVABLE ELEMENT OF SAID ELEMENTS OF SAID COMPASS AND SAID INDICATOR BEING POSITIONED IN CONCENTRIC ALIGNMENT WITH THE MOVABLE SAID ELEMENT TO DISPLAY AN ALIGNED PRESENTATION WITH SAID MOVABLE SAID ELEMENT WHEN THE MOVABLE SAID ELEMENT AND SAID INDICATOR ARE MOVED IN POSITION ABOUT THEIR AXIS AT THE SAME RATE OF ROTATION; AND (C) ROTATIONAL DRIVING MEANS COUPLED TO SAID DIRECTING MEANS FOR ROTATING SAID INDICATOR IN EITHER DIRECTION OF ROTATION AND AT A SELECTED RATE OF ROTATION.
References Cited (Backward Citations)
US2532974A
Cited
US2614251A
Cited
US2809444A
Cited
US3114788A
Cited
US2928187A
Cited
US2896145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |