Patent US3819250A successfully refreshed from Google Patents.
US3433568A
Expired / Lapsed
US
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Motion sensing apparatus
Assignee: Singer General Precision Inc
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Filing: 1964-01-21
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Granted: 1969-03-18
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Expires: 1984-01-21
Abstract
No abstract record available.
Inventors
- 👤 Clement A Skalski
- 👤 John C Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:48
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A MOTION SENSING APPARATUS COMPRISING THREE SPHERICAL MIRRORS FIXED ABOUT A COMMON CENTER IN EQUALLY SPACED RELATION ABOUT THE EQUATOR OF THE SPHERE DEFINED BY THE MIRROS TO FORM AN EQUILATREAL TRANGULAR OPTICAL CIRCUIT, MEANS FOR GENERATING COUNTER-ROTATING LIGHT BEAMS IN SAID EQUILATERAL TRIANGULAR OPTICAL CIRCUIT EACH HAVING THE SAME WAVE LENGTH, ONE OF SAID MIRRORS TRANSMITTING A FRACTION OF THE LIGHT BEAMS THERETHROUGH, SAID ONE MIRROR HAVING A PLANAR REAR SURFACE, A PLANO-CONVEX LENS BEHIND SAID ONE MIRROR HAVING ITS PLANAR SURFACE FACING THE PLANAR REAR SURFACE OF SAID ONE MIRROR, THE CONFRONTING FLAT FACES OF SAID MIRROR AND LENS DEFINING A WEDGE ANGLE TO ELIMINATE THE EFFECT OT REFLECTIONS, THE CONVEX SURFACE OF SAID PLANO-CONVEX LENS HAVING THE SAME RADIUS OF CURVATURE AS SAID ONE MIRROR FOR STRAIGHTENING THE WAVE FRONTS OF THE LIGHT BEAMS TRANSMITTED THROUGH SAID ONE MIRROR, COMBINING CIRCUIT MEANS FOR COMBINING THE LIGHT BEAMS FROM SAID CONVEX LENS INTO ONE BEAM, A PHOTO-DETECTOR ENERGIZED BY SAID ONE BEAM, AND FREQUENCY MEASURING MEANS FOR MEASURING AND BEAT FREQUENCY IN THE OUTPUT OF SAID PHOTO-DECTOR RESULTING FROM ROTATION OF THE APPARATUS.
Claim 2
Dependent Claim
185 words
A MOTION SENSING APPARATUS COMPRISING THREE SPHERICAL MIRRORS FIXED ABOUT A COMMON CENTER IN EQUALLY SPACED RELATION ABOUT THE EQUATOR OF THE SPHERE DEFINED BY THE MIRROS TO FORM AN EQUILATREAL TRANGULAR OPTICAL CIRCUIT, MEANS FOR GENERATING COUNTER-ROTATING LIGHT BEAMS IN SAID EQUILATERAL TRIANGULAR OPTICAL CIRCUIT EACH HAVING THE SAME WAVE LENGTH, ONE OF SAID MIRRORS TRANSMITTING A FRACTION OF THE LIGHT BEAMS THERETHROUGH, SAID ONE MIRROR HAVING A PLANAR REAR SURFACE, A PLANO-CONVEX LENS BEHIND SAID ONE MIRROR HAVING ITS PLANAR SURFACE FACING THE PLANAR REAR SURFACE OF SAID ONE MIRROR, THE CONFRONTING FLAT FACES OF SAID MIRROR AND LENS DEFINING A WEDGE ANGLE TO ELIMINATE THE EFFECT OT REFLECTIONS, THE CONVEX SURFACE OF SAID PLANO-CONVEX LENS HAVING THE SAME RADIUS OF CURVATURE AS SAID ONE MIRROR FOR STRAIGHTENING THE WAVE FRONTS OF THE LIGHT BEAMS TRANSMITTED THROUGH SAID ONE MIRROR, COMBINING CIRCUIT MEANS FOR COMBINING THE LIGHT BEAMS FROM SAID CONVEX LENS INTO ONE BEAM, A PHOTO-DETECTOR ENERGIZED BY SAID ONE BEAM, AND FREQUENCY MEASURING MEANS FOR MEASURING AND BEAT FREQUENCY IN THE OUTPUT OF SAID PHOTO-DECTOR RESULTING FROM ROTATION OF THE APPARATUS.
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |