Patent
1978-03-22
1979-09-04
Grieb, William H.
G09B 706
Patent
active
041663250
ABSTRACT:
A didactic, or teaching, apparatus upon which interrogatory documents, or test sheets, may be placed in the manner of an overlay on the face side of the machine. The interrogatory document, which contains at least one interrogative statement, or question, together with at least two alternative responses, or answers, will be visibly illuminated from behind by an arrangement of light emitting devices. The light will fall on the document from behind so as to distinctly transilluminate the document in the several areas occupied by the alternative responses. The several areas of the alternative responses are, at the same time, caused to individually cooperate with several coupling devices, wherein one separate coupling device is provided for each of the several alternative responses. The student continues the didactic activity by electing one alternative response, for each interrogatory statement, whereupon he places a handheld, pen-like, probe containing a portable coupling means which is responsively interactive with any one of the several coupling devices affixed to the machine. Cooperation is accomplished betwixt the selected coupling device and the portable, variously positioned, coupling means so as to cause the machine to respond to the student's choice through making a comparison of the choice with a signal pattern indicating proper choices which is derived from a unique, cipher-like, indicia present on each interrogatory document which may be meaningfully read by the machine, but not the student.
REFERENCES:
patent: 3057082 (1962-10-01), Wellington et al.
patent: 3100352 (1963-08-01), Boissevain
patent: 3740869 (1973-06-01), Pleasants
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