US3300867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic compass
Assignee: Kaman Aircraft Corp
•
Filing: 1964-03-23
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Granted: 1967-01-31
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Expires: 1984-03-23
Abstract
No abstract record available.
Inventors
- 👤 Edward J Sampson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:05
CPC Classifications
G; G01; G01C; G01C17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN A MAGNETIC COMPASS FOR USE WITH A VEHICLE, THE COMBINATION COMPRISING A HOUSING HAVING A TRANSPARENT BOTTOM, A COMPASS CARD SUPPORTED WITHIN SAID HOUSING FOR MOVEMENT ABOUT A VERTICAL AXIS AND INCLUDING A DOWNWARDLY DIRECTED ANNULAR FACE HAVING A CENTRAL OPENING AND HAVING REFERENCE MARKINGS ARRANGED IN AN ANNULAR SERIES ABOUT SAID VERTICAL AXIS, SAID REFERENCE MARKING BEING LOCATED AT THE RADIALLY INNER MARGIN OF SAID CARD FACE, A REFERENCE ELEMENT FIXED RELATIVE TO SAID HOUSING AND LOCATED WITHIN SAID CENTRAL OPENING OF SAID CARD FACE, SAID REFERENCE ELEMENT HAVING AT LEAST ONE REFERENCE MARK THEREON FOR COOPERATION WITH SAID REFERENCE MARKINGS OF SAID COMPASS CARD, AND A MIRROR POSITIONED BELOW SAID TRANSPARENT BOTTOM AND AT AN INCLINED ANGLE TO SAID VERTICAL AXIS FOR REFLECTING AN IMAGE OF SAID DOWNWARDLY DIRECTED FACE OF SAID COMPASS CARD, SAID MIRROR BEING OF SUFFICIENT SIZE TO REFLECT AN IMAGE OF THE COMPLETE ANNULAR SERIES OF SAID REFERENCE MARKINGS AND OF SAID REFERENCE ELEMENT.
Claim 2
Dependent Claim
161 words
IN A MAGNETIC COMPASS FOR USE WITH A VEHICLE, THE COMBINATION COMPRISING A HOUSING HAVING A TRANSPARENT BOTTOM, A COMPASS CARD SUPPORTED WITHIN SAID HOUSING FOR MOVEMENT ABOUT A VERTICAL AXIS AND INCLUDING A DOWNWARDLY DIRECTED ANNULAR FACE HAVING A CENTRAL OPENING AND HAVING REFERENCE MARKINGS ARRANGED IN AN ANNULAR SERIES ABOUT SAID VERTICAL AXIS, SAID REFERENCE MARKING BEING LOCATED AT THE RADIALLY INNER MARGIN OF SAID CARD FACE, A REFERENCE ELEMENT FIXED RELATIVE TO SAID HOUSING AND LOCATED WITHIN SAID CENTRAL OPENING OF SAID CARD FACE, SAID REFERENCE ELEMENT HAVING AT LEAST ONE REFERENCE MARK THEREON FOR COOPERATION WITH SAID REFERENCE MARKINGS OF SAID COMPASS CARD, AND A MIRROR POSITIONED BELOW SAID TRANSPARENT BOTTOM AND AT AN INCLINED ANGLE TO SAID VERTICAL AXIS FOR REFLECTING AN IMAGE OF SAID DOWNWARDLY DIRECTED FACE OF SAID COMPASS CARD, SAID MIRROR BEING OF SUFFICIENT SIZE TO REFLECT AN IMAGE OF THE COMPLETE ANNULAR SERIES OF SAID REFERENCE MARKINGS AND OF SAID REFERENCE ELEMENT.
References Cited (Backward Citations)
GB191029677A
Cited
US1388292A
Cited
US1701034A
Cited
US1961312A
Cited
US1944104A
Cited
US2215622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |