Title: Audio-visual system including audio-visual slides

Abstract: An audio-visual system for providing correlated audio and visual presentations from audio-visual slides in a sequence corresponding to a branched learning format. Upon an operator selecting a presented response choice, a projected program containing first indicia providing a binary number indicating the number of steps and second indicia indicating the direction which the slide magazine should be stepped to be in position for presenting the next slide, is sensed and the binary number is stored in a register. The magazine is stepped in the indicated direction; and the number of steps taken are counted and compared to the binary number stored in the register. When the compared counts are equal, the stepping of the magazine is stopped.

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Other info:

Inventors: Roche, John L. (St. Paul, MN, US)

Application Number: 255450
Filing Date: 1972-05-22
Publication_date: 1976-03-09
Assignee: Minnesota Mining and Manufacturing Co. (St. Paul, MN)
Primary Class(es): 434/310 353/19, 434/325
Other Classes:
US Patent Ref:

3122054	Feb, 1964	Dimitracopoulos	353/18.
3353280	Nov, 1967	Emde	35/9.
3383781	May, 1968	Diuzet	35/9.
3471942	Oct, 1969	Weitzman	35/9.
3497966	Mar, 1970	Gaven	35/9.
3501851	Mar, 1970	Price	35/9.
3541699	Nov, 1970	Baker	35/9.
3608208	Sep, 1971	Willardson	35/9.

Other Refs:
Primary Examiner: Grieb, Wm. H.
Assistant Examiner:
Attorney: Alexander, Sell, Steldt & DeLaHunt