US3132254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electric apparatus for detecting flaws in machine knitted material
Assignee: Individual
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Filing: 1961-11-27
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Granted: 1964-05-05
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Expires: 1981-11-27
Abstract
No abstract record available.
Inventors
- 👤 Woodward William Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:44
CPC Classifications
D; D04; D04B; D04B35/00; D04B35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
APPARATUS FOR DETECTING FLAWS IN KNITTED MATERIAL COMPRISING TWO PHOTO-ELECTRIC DEVICES SENSITIVE TO CHANGES IN DIFFERENT PORTIONS OF THE FABRIC EACH OF SAID PHOTOELECTRIC DEVICES BEING ELECTRICALLY CONNECTED TO A VARIABLE GAIN AMPLIFIER, A DETECTING DEVICE ARRANGED TO RESPOND TO A DIFFERENCE IN THE OUTPUTS OF THE TWO AMPLIFIERS CAUSED BY A FLAW IN THE FABRIC AND AN AUTOMATIC GAIN CONTROL WHICH CONSTANTLY TENDS TO REGULATE THE GAIN OF ONE AMPLIFIER RELATIVE TO THAT OF THE OTHER SO AS TO COMPENSATE FOR CHANGES IN THE CHARACTERISTICS OF THE TWO AMPLIFIERS SAID AUTOMATIC GAIN CONTROL HAVING A TIME DELAY ELEMENT WHICH RENDERS SAID AUTOMATIC GAIN CONTROL SLOW AS COMPARED WITH THE RESPONSE OF SAID PHOTO-ELECTRIC DEVICES CAUSED BY A FLAW IN THE FABRIC.
Claim 2
Dependent Claim
122 words
APPARATUS FOR DETECTING FLAWS IN KNITTED MATERIAL COMPRISING TWO PHOTO-ELECTRIC DEVICES SENSITIVE TO CHANGES IN DIFFERENT PORTIONS OF THE FABRIC EACH OF SAID PHOTOELECTRIC DEVICES BEING ELECTRICALLY CONNECTED TO A VARIABLE GAIN AMPLIFIER, A DETECTING DEVICE ARRANGED TO RESPOND TO A DIFFERENCE IN THE OUTPUTS OF THE TWO AMPLIFIERS CAUSED BY A FLAW IN THE FABRIC AND AN AUTOMATIC GAIN CONTROL WHICH CONSTANTLY TENDS TO REGULATE THE GAIN OF ONE AMPLIFIER RELATIVE TO THAT OF THE OTHER SO AS TO COMPENSATE FOR CHANGES IN THE CHARACTERISTICS OF THE TWO AMPLIFIERS SAID AUTOMATIC GAIN CONTROL HAVING A TIME DELAY ELEMENT WHICH RENDERS SAID AUTOMATIC GAIN CONTROL SLOW AS COMPARED WITH THE RESPONSE OF SAID PHOTO-ELECTRIC DEVICES CAUSED BY A FLAW IN THE FABRIC.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |