Patent US2758712A successfully refreshed from Google Patents.
US2758712A
Expired / Lapsed
US
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Detecting apparatus
Assignee: LINDERMAN ENGINEERING Co
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Filing: 1952-08-18
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Granted: 1956-08-14
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Expires: 1972-08-18
Abstract
No abstract record available.
Inventors
- 👤 Garrett B Linderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/892; G01N21/894
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
PIN HOLE DETECTING APPARATUS FOR METAL PLATE COMPRISING FEEDING MEANS DIRECTING WORK ALONG A PREDETERMINED PATH, A SOURCE OF LIGHT PRODUCING A COMPONENT BEYOND THE VISIBLE RANGE, PHOTOELECTRIC MEANS RESPONSIVE TO SAID COMPONENT, A HOUSING FOR SAID RESPONSIVE MEANS OPAQUE TO VISIBLE LIGHT, A FILTER TRANSPARENT SUBSTANTIALLY ONLY TO SAID COMPONENT FORMING A PORTION OF SAID HOUSING EXPOSED TO LIGHT FROM SAID SOURCE PENETRATING SAID PLATE, SAID SOURCE AND RESPONSIVE MEANS BEING DISPOSED ON OPPOSITE SIDES OF SAID PATH, MODULATING MEANS PROVIDING A FREQUENCY CONTROLLING SAID SOURCE TO PRODUCE PULSATIONS OF LIGHT SUBSTANTIALLY EXCEEDING THAT OF COMMERCIAL LIGHTING FREQUENCIES, AMPLIFYING MEANS SHARPLY TUNED TO THE PULSATION RATE OF SAID SOURCE, SAID AMPLIFYING MEANS HAVING AN INPUT CIRCUIT CONNECTED WITH SAID RESPONSIVE MEANS AND AN OUTPUT CIRCUIT INCLUDING CLASSIFYING APPARATUS DISTINGUISHING CONTINUOUS MATERIAL FROM THAT CONTAINING HOLES.
Claim 2
Dependent Claim
136 words
PIN HOLE DETECTING APPARATUS FOR METAL PLATE COMPRISING FEEDING MEANS DIRECTING WORK ALONG A PREDETERMINED PATH, A SOURCE OF LIGHT PRODUCING A COMPONENT BEYOND THE VISIBLE RANGE, PHOTOELECTRIC MEANS RESPONSIVE TO SAID COMPONENT, A HOUSING FOR SAID RESPONSIVE MEANS OPAQUE TO VISIBLE LIGHT, A FILTER TRANSPARENT SUBSTANTIALLY ONLY TO SAID COMPONENT FORMING A PORTION OF SAID HOUSING EXPOSED TO LIGHT FROM SAID SOURCE PENETRATING SAID PLATE, SAID SOURCE AND RESPONSIVE MEANS BEING DISPOSED ON OPPOSITE SIDES OF SAID PATH, MODULATING MEANS PROVIDING A FREQUENCY CONTROLLING SAID SOURCE TO PRODUCE PULSATIONS OF LIGHT SUBSTANTIALLY EXCEEDING THAT OF COMMERCIAL LIGHTING FREQUENCIES, AMPLIFYING MEANS SHARPLY TUNED TO THE PULSATION RATE OF SAID SOURCE, SAID AMPLIFYING MEANS HAVING AN INPUT CIRCUIT CONNECTED WITH SAID RESPONSIVE MEANS AND AN OUTPUT CIRCUIT INCLUDING CLASSIFYING APPARATUS DISTINGUISHING CONTINUOUS MATERIAL FROM THAT CONTAINING HOLES.
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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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |