US3219830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive apparatus for reading graduated scales
Assignee: Individual
•
Filing: 1960-09-06
•
Granted: 1965-11-23
•
Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Sharman Godfrey Alan
- 👤 Sharman John Alan Brooke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:27
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A SCALE READING APPARATUS COMPRISING A FIRST PART MOUNTED FOR MOVEMENT RELATIVE TO A SECOND PART, A GRADUATED SCALE MOUNTED ON SAID FIRST PART, SAID SCALE INCLUDING AT LEAST TWO SERIES OF GRADUATIONS COMPRISING TRANSPARENT AND OPAQUE MARKINGS, SAID SCALE HAVING A FIRST PORTION AND A SECOND PORTION, MEANS MOUNTED ON SAID SECOND PART FOR ILLUMINATING THE FIRST PORTION OF SAID SCALE, OPTICAL MEANS MOUNTED ON SAID SECOND PART FOR PROJECTING AN IMAGE OF SAID ILLUMINATED FIRST PORTION ONTO THE SECOND PORTION OF SAID SCALE, AND PHOTOELECTRIC MEANS MOUNTED ON SAID SECOND PART TO RECEIVE LIGHT TRANSMITTED THROUGH SAID SECOND PORTION OF SAID SCALE, AND MASKING MEANS MOVABLE RELATIVE TO SAID PORTIONS OF SAID SCALE FOR OBSTRUCTING TRANSMISSION OF LIGHT THROUGH ALL BUT ONE OF SAID SERIES OF GRADUATIONS.
Claim 2
Dependent Claim
129 words
A SCALE READING APPARATUS COMPRISING A FIRST PART MOUNTED FOR MOVEMENT RELATIVE TO A SECOND PART, A GRADUATED SCALE MOUNTED ON SAID FIRST PART, SAID SCALE INCLUDING AT LEAST TWO SERIES OF GRADUATIONS COMPRISING TRANSPARENT AND OPAQUE MARKINGS, SAID SCALE HAVING A FIRST PORTION AND A SECOND PORTION, MEANS MOUNTED ON SAID SECOND PART FOR ILLUMINATING THE FIRST PORTION OF SAID SCALE, OPTICAL MEANS MOUNTED ON SAID SECOND PART FOR PROJECTING AN IMAGE OF SAID ILLUMINATED FIRST PORTION ONTO THE SECOND PORTION OF SAID SCALE, AND PHOTOELECTRIC MEANS MOUNTED ON SAID SECOND PART TO RECEIVE LIGHT TRANSMITTED THROUGH SAID SECOND PORTION OF SAID SCALE, AND MASKING MEANS MOVABLE RELATIVE TO SAID PORTIONS OF SAID SCALE FOR OBSTRUCTING TRANSMISSION OF LIGHT THROUGH ALL BUT ONE OF SAID SERIES OF GRADUATIONS.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |