Electrical educational device
First Claim
1. A system for reproducing information recorded at periodic intervals on a magnetic tape in first and second channels including both data and control information comprising means including at least one magnetic head for reproducing as first and second electrical signals the information recorded at periodic intervals in said first and second channels on the magnetic tape, repectively;
- selection means including a plurality of switches individually selectively connectable to a voltage level for producing an output indicative of the manual selection of one of a plurality of selection states;
comparison means for comparing the output of said selection means with the control information reproduced by said magnetic head including a plurality of AND gates having one input connected to a respective one of said switches and means for applying said control information from said magnetic head to a second input of said AND gates;
indication means for providing first or second indications in dependence on the result of said comparing by said comparison means, including an electrical transducer and control means responsive to said comparison means for applying one or the other of said first and second electrical signals to said electrical transducer in accordance with the result of said comparison; and
timing means responsive to the detection of a tone at a first frequency during each periodic interval for enabling operation of said control means;
wherein said control information is provided in one of said first and second channels as one or more tones at a second frequency and wherein said means for applying said control information to said AND gates includes a tone decoder connected to receive one of said first and second electrical signals and a counter having an input connected to receive the output of said tone decoder and plurality of outputs connected respectively to the second inputs of said AND gates.
2 Assignments
0 Petitions
Accused Products
Abstract
A magnetic tape player has a stereo playback head for reproducing information from adjacent channels on a magnetic tape on which there is recorded a series of questions and answers in successive blocks. In a first portion of each block a given question and a plurality of possible answers are recorded in both channels, in a second portion of the block a coded indication of the correct answer to the question is recorded in one channel, and in a third portion of the block a correct indication is recorded in one channel and an incorrect indication is recorded in the other channel. The second portion of the block is marked by a first tone to indicate the start of the decision time during which one of a plurality of answer buttons is to be depressed to select an answer and the third portion of the block is marked by a second tone to indicate the end of the decision time. The coded indication of the correct answer as derived from the second portion of the block is then compared with the answer button which has been depressed, and the result of this comparison controls the passing of the one or the other channel to an audio output during reproduction of the information recorded in the third portion of the block.
21 Citations
20 Claims
-
1. A system for reproducing information recorded at periodic intervals on a magnetic tape in first and second channels including both data and control information comprising means including at least one magnetic head for reproducing as first and second electrical signals the information recorded at periodic intervals in said first and second channels on the magnetic tape, repectively;
- selection means including a plurality of switches individually selectively connectable to a voltage level for producing an output indicative of the manual selection of one of a plurality of selection states;
comparison means for comparing the output of said selection means with the control information reproduced by said magnetic head including a plurality of AND gates having one input connected to a respective one of said switches and means for applying said control information from said magnetic head to a second input of said AND gates;
indication means for providing first or second indications in dependence on the result of said comparing by said comparison means, including an electrical transducer and control means responsive to said comparison means for applying one or the other of said first and second electrical signals to said electrical transducer in accordance with the result of said comparison; and
timing means responsive to the detection of a tone at a first frequency during each periodic interval for enabling operation of said control means;
wherein said control information is provided in one of said first and second channels as one or more tones at a second frequency and wherein said means for applying said control information to said AND gates includes a tone decoder connected to receive one of said first and second electrical signals and a counter having an input connected to receive the output of said tone decoder and plurality of outputs connected respectively to the second inputs of said AND gates. - View Dependent Claims (2, 3, 4, 5, 6)
- selection means including a plurality of switches individually selectively connectable to a voltage level for producing an output indicative of the manual selection of one of a plurality of selection states;
-
7. A magnetic tape player for reproducing from first and second channels of a magnetic tape sequential blocks of information including data and control information, said control information being recorded in one of said first and second channels and including one or more tones at a first frequency, comprising a tape unit including a playback head for reproducing as electrical signals the sequential blocks of information from the magnetic tape;
- an audio output circuit including at least one speaker to which the output of said playback head is to be selectively applied;
selection means for providing an indication of the manual selection of one of a plurality of available choices which are each assigned a different numerical value; and
control means responsive to the numerical value indicated by tones at said first frequency provided as part of the control information in each block of information reproduced by said playback head and the numerical value of the manual selection indication from said selection means for selectively applying the data in said block of information which is recorded either in said first or said second channel to said audio output circuit. - View Dependent Claims (8, 9, 10, 11, 12, 13)
- an audio output circuit including at least one speaker to which the output of said playback head is to be selectively applied;
-
14. A magnetic tape player for reproducing recorded information from a magnetic tape having first and second recorded channels, comprising reproducing means for selectively reproducing the information recorded on said first and said second recorded channels as first and second electrical signals;
- transducer means responsive to said first and second electrical signals for audibly presenting said recorded information;
selection means for indicating the manual selection of one of a plurality of selection states;
connection means for connecting only one or the other of said first and second electrical signals to said transducer means; and
logic circuit means responsive to said selection means and to control signals forming part of said recorded information in one of said first and second recorded channels as provided by said reproducing means for controlling said connection means, whereby the recorded information of only one of said first and second recorded channels is audibly presented by said transducer means in a selective manner at any given time, including means responsive to said control signals for controlling said connection means to apply to said transducer means that one of said first and second electrical signals which is derived from the recorded channel not including said control signals while said control signals are being detected and for controlling said connection means to apply either of said first and second electrical signals to said transducer means at other times depending on the correspondence between the output of said selection means and said control signals. - View Dependent Claims (15, 16)
- transducer means responsive to said first and second electrical signals for audibly presenting said recorded information;
-
17. A method of recording a series of questions and answers as successive blocks of information in first and second channels on a magnetic tape comprising the steps of
magnetically recording the same question in both of said first and second channels in a first portion of a block of information; -
magnetically recording in a least one of said first and second channels in a second portion of the block of information following said first portion a code indication of the answer to the question recorded in said first portion; and magnetically recording in a third portion of the block of information following said second portion a first indication of a correct response in one of said first and second channels and a second indication of an incorrect response in the other of said first and second channels. - View Dependent Claims (18, 19, 20)
-
Specification