US3277588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instruction terminal
Assignee: International Business Machines Corp
•
Filing: 1964-08-20
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Granted: 1966-10-11
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Expires: 1984-08-20
Abstract
No abstract record available.
Inventors
- 👤 John J Lynott
- 👤 Robert C Treseder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:34
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/08; G03; G03B; G03B21/00; G03B21/10; G03B21/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
AN INSTRUMENT TERMINAL FOR PROVIDING RANDOM ACCESS DISPLAY AND DETECTING STUDENT RESPONSES, COMPRISING: A PLURALITY OF STORAGE MEDIA HAVING DISPLAY IMAGES THEREON; MEANS FOR STORING SAID PLURALITY OF STORAGE MEDIA; A DISPLAY SCREEN; AN OPTICAL SYSTEM HAVING AN OPTICAL PATH FOR PROJECTING A DISPLAY IMAGE FROM ONE OF SAID STORAGE MEDIA ONTO SAID DISPLAY SCREEN; A RANDOM ACCESS SELECTOR AND PICKER MECHANISM FOR PICKING A SELECTED STORAGE MEDIUM FROM SAID STORAGE MEANS AND PLACING SAID SELECTED STORAGE MEDIUM IN SAID OPTICAL PATH FOR PROJECTION; A STUDENT RESPONSE WAND HAVING A PHOTODETECTOR THEREIN, SAID WAND BEING MANUALLY POSITIONABLE, WHEREBY A STUDENT MAY POSITION SAID WAND, AND THEREBY SAID PHOTODETECTOR, AT A SELECTED POSITION ON SAID DISPLAY SCREEN; MEANS FOR ALTERNATELY SCANNING LINES OF LIGHT VERTICALLY AND HORIZONTALLY ACROSS SAID DISPLAY SCREEN, ILLUMINATING SAID PHOTODETECTOR UPON INTERSECTING WITH SAID WAND WHEN SAID WAND IS MANUALLY POSITIONED ON SAID DISPLAY SCREEN; AND MEANS FOR DETECTING THE POSITION OF EITHER OF SAID LINES OF LIGHT ON SAID SCREEN WHEN SAID PHOTODETECTOR IS ILLUMINATED.
Claim 2
Dependent Claim
169 words
AN INSTRUMENT TERMINAL FOR PROVIDING RANDOM ACCESS DISPLAY AND DETECTING STUDENT RESPONSES, COMPRISING: A PLURALITY OF STORAGE MEDIA HAVING DISPLAY IMAGES THEREON; MEANS FOR STORING SAID PLURALITY OF STORAGE MEDIA; A DISPLAY SCREEN; AN OPTICAL SYSTEM HAVING AN OPTICAL PATH FOR PROJECTING A DISPLAY IMAGE FROM ONE OF SAID STORAGE MEDIA ONTO SAID DISPLAY SCREEN; A RANDOM ACCESS SELECTOR AND PICKER MECHANISM FOR PICKING A SELECTED STORAGE MEDIUM FROM SAID STORAGE MEANS AND PLACING SAID SELECTED STORAGE MEDIUM IN SAID OPTICAL PATH FOR PROJECTION; A STUDENT RESPONSE WAND HAVING A PHOTODETECTOR THEREIN, SAID WAND BEING MANUALLY POSITIONABLE, WHEREBY A STUDENT MAY POSITION SAID WAND, AND THEREBY SAID PHOTODETECTOR, AT A SELECTED POSITION ON SAID DISPLAY SCREEN; MEANS FOR ALTERNATELY SCANNING LINES OF LIGHT VERTICALLY AND HORIZONTALLY ACROSS SAID DISPLAY SCREEN, ILLUMINATING SAID PHOTODETECTOR UPON INTERSECTING WITH SAID WAND WHEN SAID WAND IS MANUALLY POSITIONED ON SAID DISPLAY SCREEN; AND MEANS FOR DETECTING THE POSITION OF EITHER OF SAID LINES OF LIGHT ON SAID SCREEN WHEN SAID PHOTODETECTOR IS ILLUMINATED.
References Cited (Backward Citations)
US3121959A
Cited
US3141243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |