Patent
1974-10-15
1976-06-22
Wolff, John H.
35 48A, G09B 308
Patent
active
039641767
ABSTRACT:
The invention relates to an instructional apparatus in which a holding mechanism has depressions in its upper surface of two different depths, means being provided to hold a printed format containing selected areas indicating answer choices on the upper surface of the holding mechanism. The selected areas in the format are arranged to align with the depressions and are defined by holes through the printed sheet. A blank response sheet is sandwiched between the printed format and the upper surface of the holding mechanism. The user pushes a stylus through the selected hole, and thence through the blank response sheet and into the underlying depression. If he has selected the correct answer the stylus will make a large hole in the blank sheet because the correct selections are above deep depressions whereas incorrect answer selections are above shallow depressions. The blank response sheet, therefore, provides a permanent indication of right and wrong answers since right answers will show up as large holes in the sheet and wrong answers will show up as small holes. The blank response sheet may be part of a roll of paper carried by rollers positioned at opposite sides of the holding mechanism so that the response sheet can be incrementally shifted to enable the printed format to be used a second and subsequent times.
REFERENCES:
patent: 3174231 (1965-03-01), Schure
patent: 3177595 (1965-04-01), Yonkers et al.
patent: 3579864 (1971-05-01), Littwin
patent: 3696526 (1972-10-01), Roeder et al.
patent: 3747229 (1973-07-01), Harte
Chase D. A. N.
Wolff John H.
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