US3221418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching machine
Assignee: International Business Machines Corp
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Filing: 1963-05-24
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Granted: 1965-12-07
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Expires: 1983-05-24
Abstract
No abstract record available.
Inventors
- 👤 Gerhard E Hoernes
- 👤 Harvey S Long
- 👤 Gerald A Maley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A TEACHING MACHINE CONTROLED BY RECORDS CONTAINING A PRINTED QUESTION AND ANSWER AND AN ANSWER PERFORATED IN COLUMNS OF INDEX POSITIONS, CERTAIN OF SAID RECORDS ALSO BEARING A PREDETERMINED CONTROL PERFORATION AND BEING ARRANGED IN AT LEAST ONE SUCCESSIVE SERIES OF RECORDS; A RECORD FEED; A STATION AT WHICH SAID QUESTION IS EXPOSED AND BOTH PRINTED AND PERFORATED ANSWERS ARE CONCEALED; A PLURALITY OF KIEYS; PERFORATION SENSING MEANS; COMPARING MEANS JOINTLY CONTROLLED BY OPERATION OF ONE OF SAID KEYS AND SAID SENSING MEANS; CONTROL MEANS ACTUATED BY SAID COMPARING MEANS TO OPERATE SAID FEED; A PRESETTABLE CONTROL DEVICE; AND MEANS OPERATED JOINTLY BY SAID COMPARING MEANS AND SAID PRESETTABLE CONTROL DEVICE TO INITIATE A SKIPPING OPERATION OF SAID RECORD FEED TO PASS ALL SUBSEQUENT RECORDS BEARING SAID PREDETERMINED CONTROL PERFORATION THROUGH THE MACHINE WITHOUT INDIVIDUAL VERIFICATION THEREOF.
Claim 2
Dependent Claim
138 words
IN A TEACHING MACHINE CONTROLED BY RECORDS CONTAINING A PRINTED QUESTION AND ANSWER AND AN ANSWER PERFORATED IN COLUMNS OF INDEX POSITIONS, CERTAIN OF SAID RECORDS ALSO BEARING A PREDETERMINED CONTROL PERFORATION AND BEING ARRANGED IN AT LEAST ONE SUCCESSIVE SERIES OF RECORDS; A RECORD FEED; A STATION AT WHICH SAID QUESTION IS EXPOSED AND BOTH PRINTED AND PERFORATED ANSWERS ARE CONCEALED; A PLURALITY OF KIEYS; PERFORATION SENSING MEANS; COMPARING MEANS JOINTLY CONTROLLED BY OPERATION OF ONE OF SAID KEYS AND SAID SENSING MEANS; CONTROL MEANS ACTUATED BY SAID COMPARING MEANS TO OPERATE SAID FEED; A PRESETTABLE CONTROL DEVICE; AND MEANS OPERATED JOINTLY BY SAID COMPARING MEANS AND SAID PRESETTABLE CONTROL DEVICE TO INITIATE A SKIPPING OPERATION OF SAID RECORD FEED TO PASS ALL SUBSEQUENT RECORDS BEARING SAID PREDETERMINED CONTROL PERFORATION THROUGH THE MACHINE WITHOUT INDIVIDUAL VERIFICATION THEREOF.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |