US3245307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moire fringe apparatus for measuring small movements
Assignee: US Philips Corp
•
Filing: 1962-09-24
•
Granted: 1966-04-12
•
Expires: 1982-09-24
Abstract
No abstract record available.
Inventors
- 👤 Lang Hendrik De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01D5/38; G01B; G01B21/00; G01B21/02; G01B21/06; G01B21/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A DEVICE FOR MEASURING THE DISPLACEMENT OF A MOVABLE MEMBER WITH RESPECT TO A FIXED POINT COMPRISING A RASTED COUPLED TO SAID MOVABLE MEMBER, SAID RASTER HAVING A PLURALITY OF PARALLEL SPACED LINES DEFINING OPAQUE AND TRANSPARENT AREAS WHICH ARE ORIENTED SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF MOVEMENT OF THE MOVABLE MEMBER, MEANS TO PROJECT A LIGHT BEAM AT A GIVEN AREA CONSTITUTING A PORTION LESS THAN A WHOLE OF THE RASTER, OPTICAL MEANS FOR PRODUCING A PLURALITY OF PHASE-DISPLACED IMAGES OF SAID RASTER PORTION MOVING IN DIRECTIONS OTHER THAN THE DIRECTION OF MOVEMENT OF THE RASTER AT THE RASTER, REFLECTOR MEANS POSITIONED TO INTERCEPT SAID IMAGES AND RETURN SAID PHASE DISPLACED RASTER IMAGES PORTIONS BACK THROUGH SAID OPTICAL MEANS TO BE COINCIDENT WITH SAID
Claim 2
Independent Claim
125 words
A DEVICE FOR MEASURING THE DISPLACEMENT OF A MOVABLE MEMBER WITH RESPECT TO A FIXED POINT COMPRISING A RASTED COUPLED TO SAID MOVABLE MEMBER, SAID RASTER HAVING A PLURALITY OF PARALLEL SPACED LINES DEFINING OPAQUE AND TRANSPARENT AREAS WHICH ARE ORIENTED SUBSTANTIALLY PERPENDICULAR TO THE DIRECTION OF MOVEMENT OF THE MOVABLE MEMBER, MEANS TO PROJECT A LIGHT BEAM AT A GIVEN AREA CONSTITUTING A PORTION LESS THAN A WHOLE OF THE RASTER, OPTICAL MEANS FOR PRODUCING A PLURALITY OF PHASE-DISPLACED IMAGES OF SAID RASTER PORTION MOVING IN DIRECTIONS OTHER THAN THE DIRECTION OF MOVEMENT OF THE RASTER AT THE RASTER, REFLECTOR MEANS POSITIONED TO INTERCEPT SAID IMAGES AND RETURN SAID PHASE DISPLACED RASTER IMAGES PORTIONS BACK THROUGH SAID OPTICAL MEANS TO BE COINCIDENT WITH SAID
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |