Patent US3099749A successfully refreshed from Google Patents.
US3099749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric device for measurement of areas
Assignee: Individual
•
Filing: 1961-07-12
•
Granted: 1963-07-30
•
Expires: 1981-07-12
Abstract
No abstract record available.
Inventors
- 👤 Alexander T Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:00
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
A DEVICE FOR MEASURING THE AREA OF AN OPAQUE, FLAT SPECIMEN COMPRISING A HOUSING CARRYING A PLURALITY OF LAMPS SPACED FROM A LIGHT-PERMEABLE PLATE WHICH CONSTITUTES A SUPPORT FOR THE SPECIMEN; A FIRST SELF-GENERATING PHOTOCELL SPACED FROM THE CENTER OF THE PLATE AND ILLUMINATED BY LIGHT RAYS EMERGING FROM THE PLATE; A FIRST RESISTOR CONNECTED ACROSS THE FIRST PHOTOCELL; A SECOND SELF-GENERATING PHOTOCELL SPACED FROM A MASK HAVING AN APERTURE FORMED THEREIN; A SECOND RESISTOR CONNECTED ACROSS THE SECOND PHOTOCELL; A THIRD AND FOURTH RESISTOR; CIRCUIT ELEMENTS CONNECTING THE SAID FOUR RESISTORS TO FORM A BALANCED ELECTRICAL NETWORK; A LAMP ILLUMINATING THE SECOND PHOTOCELL THROUGH THE SAID APERTURE; MEANS FOR ENERGIZING ALL OF THE SAID LAMPS FROM A VOLTAGE SOURCE HAVING A PREDETERMINED VOLTAGE; A PIVOTALLY-MOUNTED ARM HAVING AN OPAQUE VANE SECURED THERETO, SAID VANE ADAPTED TO REDUCE THE EFFECTIVE SIZE OF SAID APERTURE UPON PIVOTAL MOVEMENT OF THE SAID ARM; A SCALE CALIBRATED IN UNITS OF AREA AND COOPERATING WITH THE FREE END OF THE SAID ARM; AND MEANS FOR BALANCING THE ELECTRICAL NETWORK WHEN THE SPECIMEN IS NOT POSITIONED ON THE SAID PLATE AND THE FREE END OF SAID ARM IS ALIGNED WITH THE ZERO MARK ON THE SCALE.
Claim 2
Independent Claim
201 words
A DEVICE FOR MEASURING THE AREA OF AN OPAQUE, FLAT SPECIMEN COMPRISING A HOUSING CARRYING A PLURALITY OF LAMPS SPACED FROM A LIGHT-PERMEABLE PLATE WHICH CONSTITUTES A SUPPORT FOR THE SPECIMEN; A FIRST SELF-GENERATING PHOTOCELL SPACED FROM THE CENTER OF THE PLATE AND ILLUMINATED BY LIGHT RAYS EMERGING FROM THE PLATE; A FIRST RESISTOR CONNECTED ACROSS THE FIRST PHOTOCELL; A SECOND SELF-GENERATING PHOTOCELL SPACED FROM A MASK HAVING AN APERTURE FORMED THEREIN; A SECOND RESISTOR CONNECTED ACROSS THE SECOND PHOTOCELL; A THIRD AND FOURTH RESISTOR; CIRCUIT ELEMENTS CONNECTING THE SAID FOUR RESISTORS TO FORM A BALANCED ELECTRICAL NETWORK; A LAMP ILLUMINATING THE SECOND PHOTOCELL THROUGH THE SAID APERTURE; MEANS FOR ENERGIZING ALL OF THE SAID LAMPS FROM A VOLTAGE SOURCE HAVING A PREDETERMINED VOLTAGE; A PIVOTALLY-MOUNTED ARM HAVING AN OPAQUE VANE SECURED THERETO, SAID VANE ADAPTED TO REDUCE THE EFFECTIVE SIZE OF SAID APERTURE UPON PIVOTAL MOVEMENT OF THE SAID ARM; A SCALE CALIBRATED IN UNITS OF AREA AND COOPERATING WITH THE FREE END OF THE SAID ARM; AND MEANS FOR BALANCING THE ELECTRICAL NETWORK WHEN THE SPECIMEN IS NOT POSITIONED ON THE SAID PLATE AND THE FREE END OF SAID ARM IS ALIGNED WITH THE ZERO MARK ON THE SCALE.
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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |