Document Type and Number:
Japanese Patent JPS4929251
Kind Code:
B1
Abstract:
A film projector presents film frames in sequence. The lateral edge of the film adjacent each frame is a dark surface having eight code spots for answer selection and a three bit binary code. The code spots are dark or clear and read by a photocell. A sound tape machine includes three audio channels and a control channel having a high frequency advance signal and a low frequency tape stop signal. A binary decoder establishes output power at one of a plurality of power lines. A matrix board connects the power leads to control lines through diodes. The control lines are connected to branch circuits of a master control to operate the film projector and the tape machine in predetermined sequences with the output of the tape machine establishing an automatic film advance or a semi-automatic film advance. A film frame may provide a question and multiple choice answers. A response circuit includes a correct answer relay and an incorrect answer relay selectively connected in the master circuit to establish an interrelated control of the projector and tape machine.
Application Number:
JP5532170A
Publication Date:
August 02, 1974
Filing Date:
June 26, 1970
Export Citation:
International Classes:
G09B7/08