US3355819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching machine
Assignee: Didactics Corp
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Filing: 1965-09-16
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Granted: 1967-12-05
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Expires: 1985-09-16
Abstract
No abstract record available.
Inventors
- 👤 Jack W Hannah
- 👤 Harrold E Hiatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A TEACHING DEVICE FOR VISUALLY PROJECTING A LOGICAL SEQUENCE OF INDIVIDUAL FRAMES OF A SELF-CONTAINED FILM LESSON SERIES AND INDIVIDUAL LESSON FRAMES, COMPRISING A FILM, A SERIES OF FRAMES ON SAID FILM, EACH FRAME CONTAINING A CODED ADDRESS AND HAVING AT LEAST ONE CODE IDENTITY CORRESPONDING TO CODED ADDRESSES ON OTHER FRAMES IN THE FILM, MECHANICAL MEANS TO INDICATE A RESPONSE TO A VISUAL STIMULUS FROM A FIRST FRAME, ELECTRICAL MEANS ACTUATED BY SAID MECHANICAL MEANS THEREBY PRODUCING A FIRST SIGNAL FROM A CODED ADDRESS ON SAID FIRST FRAME, AND A SECOND SIGNAL WHICH CORRESPONDS TO THE CODED ADDRESS OF ANOTHER FRAME TO BE POSITIONED TO BE PROJECTED AND VIEWED, DRIVING MEANS TO MOVE SAID SERIES OF FRAMES PAST THE POSITION WHERE A FRAME CAN BE PROJECTED AND VIEWED, A REGISTER COMPARATOR DEVICE TO START SAID DRIVING MEANS UPON RECEIVING SAID FIRST SIGNAL FROM A CODED ADDRESS ON SAID FIRST FRAME AND STOP SAID DRIVING MEANS UPON RECEIPT OF SAID SECOND SIGNAL THROUGH A SECOND FRAME HAVING A CODED ADDRESS WHICH MATCHES A MEMORY-OVERRIDE DEAT FIRST FRAME; FURTHER INCLUDING A MEMORY-OVERRIDE DEVICE COMPRISING ANOTHER ELECTRICAL MEANS RESPONSIVE TO ANOTHER CODE IDENTITY ON A SELECTED PLURALITY OF SAID FRAMES HAVING EITHER SAID SINGLE PREDETERMINED CODE IDENTY, OR SAID PLURALITY OF CODE IDENTITIES FOR INITATING
Claim 2
Dependent Claim
213 words
A TEACHING DEVICE FOR VISUALLY PROJECTING A LOGICAL SEQUENCE OF INDIVIDUAL FRAMES OF A SELF-CONTAINED FILM LESSON SERIES AND INDIVIDUAL LESSON FRAMES, COMPRISING A FILM, A SERIES OF FRAMES ON SAID FILM, EACH FRAME CONTAINING A CODED ADDRESS AND HAVING AT LEAST ONE CODE IDENTITY CORRESPONDING TO CODED ADDRESSES ON OTHER FRAMES IN THE FILM, MECHANICAL MEANS TO INDICATE A RESPONSE TO A VISUAL STIMULUS FROM A FIRST FRAME, ELECTRICAL MEANS ACTUATED BY SAID MECHANICAL MEANS THEREBY PRODUCING A FIRST SIGNAL FROM A CODED ADDRESS ON SAID FIRST FRAME, AND A SECOND SIGNAL WHICH CORRESPONDS TO THE CODED ADDRESS OF ANOTHER FRAME TO BE POSITIONED TO BE PROJECTED AND VIEWED, DRIVING MEANS TO MOVE SAID SERIES OF FRAMES PAST THE POSITION WHERE A FRAME CAN BE PROJECTED AND VIEWED, A REGISTER COMPARATOR DEVICE TO START SAID DRIVING MEANS UPON RECEIVING SAID FIRST SIGNAL FROM A CODED ADDRESS ON SAID FIRST FRAME AND STOP SAID DRIVING MEANS UPON RECEIPT OF SAID SECOND SIGNAL THROUGH A SECOND FRAME HAVING A CODED ADDRESS WHICH MATCHES A MEMORY-OVERRIDE DEAT FIRST FRAME; FURTHER INCLUDING A MEMORY-OVERRIDE DEVICE COMPRISING ANOTHER ELECTRICAL MEANS RESPONSIVE TO ANOTHER CODE IDENTITY ON A SELECTED PLURALITY OF SAID FRAMES HAVING EITHER SAID SINGLE PREDETERMINED CODE IDENTY, OR SAID PLURALITY OF CODE IDENTITIES FOR INITATING
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |