US3751826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the application of printed learning programs
Assignee: Individual
•
Filing: 1971-09-03
•
Granted: 1973-08-14
•
Expires: 1991-09-03
Abstract
Abstract A programmed learning device employing a plurality of rotating discs with questions and answers provided thereon and an eraseable surface with cooperating eraser in a housing provided with windows.
Inventors
- 👤 H Kunert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:30
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
Device for the application of printed learning programs, consisting of a bottom plate, a cover plate, a rotating disk arranged between them which reveals a mAnually graspable circumferential toothing or the like for the rotation of the rotating disk around a central pivot, a learning program sheet arranged on the rotating disk for rotation therewith and on which are printed program problems and their solutions in sector-shaped fields, a writing surface, a sector-shaped window in the cover plate, through which simultaneously at least two successive program problems and the solution of one of the programs will be visible and through which the user can record his program solution on said writing surface, which surface is on the rotating disk, the said writing surface capable of being written on repeatedly and can be erased, a pivotal erasing device positioned between the cover plate and the bottom plate for the automatic erasing of the writing tablet in case of a rotation by 360* and also for erasing a limited angular extent of said writing surface.
Claim 2
Dependent Claim
173 words
Device for the application of printed learning programs, consisting of a bottom plate, a cover plate, a rotating disk arranged between them which reveals a mAnually graspable circumferential toothing or the like for the rotation of the rotating disk around a central pivot, a learning program sheet arranged on the rotating disk for rotation therewith and on which are printed program problems and their solutions in sector-shaped fields, a writing surface, a sector-shaped window in the cover plate, through which simultaneously at least two successive program problems and the solution of one of the programs will be visible and through which the user can record his program solution on said writing surface, which surface is on the rotating disk, the said writing surface capable of being written on repeatedly and can be erased, a pivotal erasing device positioned between the cover plate and the bottom plate for the automatic erasing of the writing tablet in case of a rotation by 360* and also for erasing a limited angular extent of said writing surface.
Claim 3
Dependent Claim
18 words
Device according to claim 1 characterized by the fact that the rotating disk defines the writing surface itself.
Claim 4
Dependent Claim
25 words
Device according to claim 2 characterized by the fact that the erasing device is a wiper which rests against the top of the writing surface.
Claim 5
Dependent Claim
29 words
Device according to claim 3 characterized by the fact that the wiper is carried by a manually operable and swingable arm, the wiper being swingable into the said window.
Claim 6
Dependent Claim
42 words
Device according to claim 2 characterized by the fact that the part of the window which is intended for the entry of the solution lies radially outside that part of the window below which the program problems and program solutions are arranged.
Claim 7
Dependent Claim
55 words
Device according to claim 1 characterized by the fact that the writing surface is a two-layer laminate written upon by pressure on both layers and erased by separating them, and wherein said wiper is positioned between said layers and is manually swingable downwardly into the zone of the said window where an answer is written.
Claim 8
Dependent Claim
20 words
Device according to claim 1 characterized by the fact that the bottom plate and the cover plate are firmly connected.
Claim 9
Dependent Claim
49 words
Device according to claim 1 characterized by the fact that the writing surface erasing device is arranged directly next to the window and that it can be swung into the window in order to erase the writing tablet in the area of the window by means of a handle.
Claim 10
Dependent Claim
29 words
Device according to claim 4 characterized by the fact that a middle part of the cover plate can be flipped up for the purpose of changing learning program sheets.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |