US3454777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of object displacements and velocities
Assignee: Sequential Electronic Systems Inc
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Filing: 1965-05-10
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Granted: 1969-07-08
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Daniel H Marcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:19
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/486; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01P3/4802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
APPARATUS FOR MEASUREMENT OF THE DISPLACEMENT OF AN OBJECT COMPRISING: MEANS TO PROVIDE A MAIN LIGHT BEAM, A MOVABLE TRACK ADAPTED TO BE COUPLED TO THE OBJECT FOR MOVEMENT THEREWITH, SAID TRACK BEING DISPOSED IN THE PATH OF SAID MAIN LIGHT BEAM TO PROVIDE A MODULATED MAIN LIGHT BEAM, BEAM SPLITTING MEANS DISPOSED IN THE PATH OF SAID MODULATED LIGHT BEAM TO PROVIDE FIRST AND SECOND MODULATED SUBSIDIARY LIGHT BEAMS, A FIRST FIXED INTERROGATING GRATING DISPOSED IN THE PATH OF SAID FIRST MODULATED SUBSIDIARY LIGHT BEAM TO PROVIDE A FIRST OPTICAL INFORMATION SIGNAL, AND A SECOND FIXED INTERROGATING GRATING DISPOSED IN THE PATH OF SAID SECOND MODULATED SUBSIDIARY LIGHT BEAM TO PROVIDE A SECOND OPTICAL INFORMATION SIGNAL.
Claim 2
Dependent Claim
117 words
APPARATUS FOR MEASUREMENT OF THE DISPLACEMENT OF AN OBJECT COMPRISING: MEANS TO PROVIDE A MAIN LIGHT BEAM, A MOVABLE TRACK ADAPTED TO BE COUPLED TO THE OBJECT FOR MOVEMENT THEREWITH, SAID TRACK BEING DISPOSED IN THE PATH OF SAID MAIN LIGHT BEAM TO PROVIDE A MODULATED MAIN LIGHT BEAM, BEAM SPLITTING MEANS DISPOSED IN THE PATH OF SAID MODULATED LIGHT BEAM TO PROVIDE FIRST AND SECOND MODULATED SUBSIDIARY LIGHT BEAMS, A FIRST FIXED INTERROGATING GRATING DISPOSED IN THE PATH OF SAID FIRST MODULATED SUBSIDIARY LIGHT BEAM TO PROVIDE A FIRST OPTICAL INFORMATION SIGNAL, AND A SECOND FIXED INTERROGATING GRATING DISPOSED IN THE PATH OF SAID SECOND MODULATED SUBSIDIARY LIGHT BEAM TO PROVIDE A SECOND OPTICAL INFORMATION SIGNAL.
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |