US3146531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Teaching device
Assignee: Field Enterprises Educational Corp
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Filing: 1961-10-02
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Granted: 1964-09-01
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Expires: 1981-10-02
Abstract
No abstract record available.
Inventors
- 👤 David C Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:57
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
283 words
A TEACHING DEVICE COMPRISING A BASE, A SUPPORT WHEEL MOUNTED ON SAID BASE FOR ROTATION ABOUT AN AXIS WITH RESPECT THERETO, A TEST SHEET MOUNTED ON SAID SUPPORT WHEEL FOR ROTATION THEREWITH ABOUT SAID AXIS AND HAVING THEREON A PLURALITY OF QUESTIONS ARRANGED IN A FIRST CIRCULAR PATH ABOUT SAID AXIS AND A CORRESPONDING PLURALITY OF ANSWERS ARRANGED IN A SECOND CIRCULAR PATH ABOUT SAID AXIS, A WORK SHEET MOUNTED ON SAID SUPPORT WHEEL FOR ROTATION THEREWITH ABOUT SAID AXIS AND HAVING THEREON A PLURALITY OF ANSWER SPACES ARRANGED IN A THIRD CIRCULAR PATH ABOUT SAID AXIS AND A CORRESPONDING PLURALITY OF SCORING SPACES ARRANGED IN A FOURTH CIRCULAR PATH ABOUT SAID AXIS, THE NUMBER OF SAID ANSWER SPACES AND SAID SCORING SPACES CORRESPONDING TO THE NUMBER OF SAID QUESTIONS ON SAID TEST SHEET, A COVER MOUNTED ON SAID BASE AND COVERING SAID SUPPORT WHEEL AND SAID TEST SHEET AND SAID WORK SHEET, A FIRST WINDOW IN SAID COVER AND OVERLYING SAID FIRST CIRCULAR PATH FOR DISPLAYING A QUESTION TO BE ANSWERED THERETHROUGH, A SECOND WINDOW IN SAID COVER AND OVERLYING SAID THIRD CIRCULAR PATH FOR DISPLAYING AN ANSWER SPACED THERETHROUGH, A THIRD WINDOW IN SAID COVER AND OVERLYING SAID FIRST CIRCULAR PATH AT A POINT CIRCUMFERENTIALLY SPACED WITH RESPECT TO SAID FIRST WINDOW FOR DISPLAYING THE PRECEDING QUESTION THERETHROUGH, A FOURTH WINDOW IN SAID COVER AND OVERLYING SAID SECOND PATH FOR DISPLAYING THE ANSWER ON SAID TEST SHEET CORRESPONDING TO THE QUESTION DISPLAYED THROUGH SAID THIRD WINDOW, A FIFTH WINDOW IN SAID COVER AND OVERLYING SAID THIRD CIRCULAR PATH AT A POINT DISPOSED CIRCUMFERENTIALLY FROM SAID SECOND WINDOW FOR DISPLAYING THERETHROUGH THE ANSWER ON SAID WORK SHEET CORRESPONDING TO THE QUESTION DISPLAYED
Claim 2
Dependent Claim
283 words
A TEACHING DEVICE COMPRISING A BASE, A SUPPORT WHEEL MOUNTED ON SAID BASE FOR ROTATION ABOUT AN AXIS WITH RESPECT THERETO, A TEST SHEET MOUNTED ON SAID SUPPORT WHEEL FOR ROTATION THEREWITH ABOUT SAID AXIS AND HAVING THEREON A PLURALITY OF QUESTIONS ARRANGED IN A FIRST CIRCULAR PATH ABOUT SAID AXIS AND A CORRESPONDING PLURALITY OF ANSWERS ARRANGED IN A SECOND CIRCULAR PATH ABOUT SAID AXIS, A WORK SHEET MOUNTED ON SAID SUPPORT WHEEL FOR ROTATION THEREWITH ABOUT SAID AXIS AND HAVING THEREON A PLURALITY OF ANSWER SPACES ARRANGED IN A THIRD CIRCULAR PATH ABOUT SAID AXIS AND A CORRESPONDING PLURALITY OF SCORING SPACES ARRANGED IN A FOURTH CIRCULAR PATH ABOUT SAID AXIS, THE NUMBER OF SAID ANSWER SPACES AND SAID SCORING SPACES CORRESPONDING TO THE NUMBER OF SAID QUESTIONS ON SAID TEST SHEET, A COVER MOUNTED ON SAID BASE AND COVERING SAID SUPPORT WHEEL AND SAID TEST SHEET AND SAID WORK SHEET, A FIRST WINDOW IN SAID COVER AND OVERLYING SAID FIRST CIRCULAR PATH FOR DISPLAYING A QUESTION TO BE ANSWERED THERETHROUGH, A SECOND WINDOW IN SAID COVER AND OVERLYING SAID THIRD CIRCULAR PATH FOR DISPLAYING AN ANSWER SPACED THERETHROUGH, A THIRD WINDOW IN SAID COVER AND OVERLYING SAID FIRST CIRCULAR PATH AT A POINT CIRCUMFERENTIALLY SPACED WITH RESPECT TO SAID FIRST WINDOW FOR DISPLAYING THE PRECEDING QUESTION THERETHROUGH, A FOURTH WINDOW IN SAID COVER AND OVERLYING SAID SECOND PATH FOR DISPLAYING THE ANSWER ON SAID TEST SHEET CORRESPONDING TO THE QUESTION DISPLAYED THROUGH SAID THIRD WINDOW, A FIFTH WINDOW IN SAID COVER AND OVERLYING SAID THIRD CIRCULAR PATH AT A POINT DISPOSED CIRCUMFERENTIALLY FROM SAID SECOND WINDOW FOR DISPLAYING THERETHROUGH THE ANSWER ON SAID WORK SHEET CORRESPONDING TO THE QUESTION DISPLAYED
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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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |