Patent US3128562A successfully refreshed from Google Patents.
US3128562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azimuth compass
Assignee: Individual
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Filing: 1961-06-30
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Granted: 1964-04-14
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Expires: 1981-06-30
Abstract
No abstract record available.
Inventors
- 👤 Yusa Toshikazu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:50
CPC Classifications
G; G01; G01C; G01C17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A COMPASS COMPRISING: (A) AN OUTER TRANSPARENT BODY SUCH AS A SPHERE AND AN INNER ROTATABLE HOLLOW BODY WITHIN SAID OUTER BODY, SAID INNER BODY HAVING MOUNTED THEREON A MAGNET RESPONSIVE TO THE MAGNETIC FIELD OF THE EARTH TO ORIENT THE INTERIOR BODY RELATIVE TO THE OUTER BODY, (B) A QUANTITY OF LIQUID PARTIALLY FILLING THE INNER BODY AND COMPLETELY FILLING THE SPACE BETWEEN THE INNER BODY AND THE OUTER BODY, THE REMAINDER OF THE SPACE IN THE INNER BODY BEING FILLED WITH A GAS, AND (C) MEANS TO CONNECT THE INTERIOR OF SAID INNER BODY WITH THE SPACE BETWEEN SAID INNER BODY AND SAID OUTER BODY COMPRISING A SPIGOT PROJECTION EXTENDING RADIALLY FROM AN INTERIOR WALL OF SAID INNER BODY TOWARD THE CENTER THEREOF WHEREIN THE END OF SAID SPIGOT IS CONSTANTLY IMMERSED IN THE LIQUID WITHIN SAID INNER BODY REGARDLESS OF THE RELATIVE POSITION OF SAID BODIES, SAID PROJECTION HAVING A PASSAGE CONNECTING THE INSIDE OF SAID INNER BODY TO THE SPACE BETWEEN SAID INNER AND OUTER BODIES,
Claim 2
Dependent Claim
170 words
A COMPASS COMPRISING: (A) AN OUTER TRANSPARENT BODY SUCH AS A SPHERE AND AN INNER ROTATABLE HOLLOW BODY WITHIN SAID OUTER BODY, SAID INNER BODY HAVING MOUNTED THEREON A MAGNET RESPONSIVE TO THE MAGNETIC FIELD OF THE EARTH TO ORIENT THE INTERIOR BODY RELATIVE TO THE OUTER BODY, (B) A QUANTITY OF LIQUID PARTIALLY FILLING THE INNER BODY AND COMPLETELY FILLING THE SPACE BETWEEN THE INNER BODY AND THE OUTER BODY, THE REMAINDER OF THE SPACE IN THE INNER BODY BEING FILLED WITH A GAS, AND (C) MEANS TO CONNECT THE INTERIOR OF SAID INNER BODY WITH THE SPACE BETWEEN SAID INNER BODY AND SAID OUTER BODY COMPRISING A SPIGOT PROJECTION EXTENDING RADIALLY FROM AN INTERIOR WALL OF SAID INNER BODY TOWARD THE CENTER THEREOF WHEREIN THE END OF SAID SPIGOT IS CONSTANTLY IMMERSED IN THE LIQUID WITHIN SAID INNER BODY REGARDLESS OF THE RELATIVE POSITION OF SAID BODIES, SAID PROJECTION HAVING A PASSAGE CONNECTING THE INSIDE OF SAID INNER BODY TO THE SPACE BETWEEN SAID INNER AND OUTER BODIES,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |