US3787988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and electronic machine for teaching arithmetic computation
Assignee: Pentax Corp
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Filing: 1971-12-30
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Granted: 1974-01-29
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Expires: 1991-12-30
Abstract
Abstract A method and machine for teaching students such as school children arithmetic computation. The machine has a display matrix provided with a plurality of display locations which can be selected by the student, and the student can select numerals to be displayed at selected display locations so that a given arithmetic problem can be set into the display matrix and the mental calculation performed by the student can be displayed to provide at the matrix an indication of a result to the problem as calculated by the student. An electronic structure automatically calculates the correct result to the problem introduced by the student, and at each stage of the computations performed by the student, as numerals selected by the student appear at the display matrix, there is an automatic indication of whether the correct calculations have been performed by the student, with the student also having the possibility of displaying the correct final result which may be compared with the result which the student has calculated.
Inventors
- 👤 T Nakajima
- 👤 M Niiho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:14
CPC Classifications
G; G09; G09B; G09B19/00; G09B19/02; G09B19/025
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
246 words
In an electronic machine for teaching arithmetic computation, display means having a plurality of display locations, manually operable numeral selecting means for selecting problem and computation numerals to be displayed at said locations, manually operable function selecting means for selecting arithmetic functions to be carried out with the selected problem numerals, electronic operatively connected with both of said selecting means and with said display means for controlling the latter to display manually selected problem and computation numerals and for automatically performing correct arithmetic computations with signals received from said function selecting means, said electronic means actuating said display means to display only the manually selected problem and computation numerals, and comparing means operatively connected with said electronic means and with said display means for comparing the automatically determined but not displayed correct computations step-by-step with the manually selected computation numerals as each of the latter numerals is selected during a sequential computation enumeration from which a result is elicited and said display means including a nonnumerical indicating means operatively connected with said comparing means to be actuated thereby for indicating whether the manually selected and displayed computation numerals are correct as each of the latter numerals appears at said display means in response to operation of said manually operable numeral selecting means by the operator so that the operator without receiving an indication of the correct numeral can replace at a given display location an incorrect numeral with another numeral until the correct numeral is displayed.
Claim 2
Dependent Claim
246 words
In an electronic machine for teaching arithmetic computation, display means having a plurality of display locations, manually operable numeral selecting means for selecting problem and computation numerals to be displayed at said locations, manually operable function selecting means for selecting arithmetic functions to be carried out with the selected problem numerals, electronic operatively connected with both of said selecting means and with said display means for controlling the latter to display manually selected problem and computation numerals and for automatically performing correct arithmetic computations with signals received from said function selecting means, said electronic means actuating said display means to display only the manually selected problem and computation numerals, and comparing means operatively connected with said electronic means and with said display means for comparing the automatically determined but not displayed correct computations step-by-step with the manually selected computation numerals as each of the latter numerals is selected during a sequential computation enumeration from which a result is elicited and said display means including a nonnumerical indicating means operatively connected with said comparing means to be actuated thereby for indicating whether the manually selected and displayed computation numerals are correct as each of the latter numerals appears at said display means in response to operation of said manually operable numeral selecting means by the operator so that the operator without receiving an indication of the correct numeral can replace at a given display location an incorrect numeral with another numeral until the correct numeral is displayed.
Claim 3
Dependent Claim
57 words
The combination of claim 1 and wherein said comparing means is operatively connected with said electronic means and with said display means for actuating said display means to independently indicate at said display means a correct final result to be compared with the final result displayed in response to operation of the manually operable numeral selecting means.
Claim 4
Dependent Claim
43 words
The combination of claim 2 and wherein a manually operable result-indicating means is operatively connected with said electronic means for acting through the latter on said comparing means to provide through the latter at said display means an indication of a correct result.
Claim 5
Dependent Claim
41 words
The combination of claim 1 and wherein a manually operable location selecting means is operatively connected with said electronic means for acting through the latter on said display means to select the locations of the latter where numerals will be displayed.
Claim 6
Dependent Claim
75 words
The combination of claim 4 and wherein said display means includes horizontal rows of display locations, said rows being vertically distributed one beneath the next at said display means, and said manually operable location selecting means including vertical shift keys for shifting a selected location vertically from one row to the next, and horizontal shift keys for shifting a selected location horizontally in a given row from one location therein to the next location therein.
Claim 7
Dependent Claim
22 words
The combination of claim 5 and wherein an indicating means is operatively connected with said display means for indicating the selected location.
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |