Interactive teaching system

Claim 2

In an interactive communication system, the combination comprising a lecture tape on which a lecture is recorded, a series of lecture address signals recorded on said lecture tape at locations identifying selected portions of said lecture, an answer tape on which a series of answers to questions that may be raised by said lecture are recorded in spaced sequential locations, a series of answer address signals recorded on said answer tape at locations identifying the beginning of each recorded answer, a tape recorder comprising switching means for selectively reproducing signals recorded on two tapes and adapted to receive said lecture and answer tapes, and means controlled by said address signals and said switching means for moving said answer tape to a location correlated with the position of said lecture tape while said tape recorder is reproducing said lecture.

Claim 3

In an interactive teaching system, the combination comprising a tape recorder adapted to receive two tapes, said tape recorder cOmprising a first set of transducers for reproducing signals recorded on a first tape, a second set of transducers for reproducing signals recorded on a second tape, first reversible drive means for transporting a first tape received by said recorder in opposite directions over a range of positions adjacent said first set of transducers, second reversible drive means for transporting a second tape received by said recorder in opposite directions over a range of positions adjacent said second set of transducers, graphic recording means responsive to applied signals for producing a graphic display, an acoustic transducer responsive to applied signals for producing an audible signal, switching means settable to first and second states, means controlled by said switching means in its first state for connecting a first transducer of said first set to said graphic recording means and connecting a second transducer of said first set to said acoustic transducer, means controlled by said switching means in its second state for connecting a first transducer of said second set to said graphic recording means and connecting a second transducer of said second set to said acoustic transducer, and sensing means responsive to the positions of tapes received by said recorder and actuated by said switching means in its first state for controlling said second drive means to transport the second tape to a position relative to said second set of transducers determined by the position of the first tape relative to said first set of transducers.

Claim 4

In an interactive teaching system, the combination comprising a tape recorder adapted to receive two tapes, said tape recorder cOmprising a first set of transducers for reproducing signals recorded on a first tape, a second set of transducers for reproducing signals recorded on a second tape, first reversible drive means for transporting a first tape received by said recorder in opposite directions over a range of positions adjacent said first set of transducers, second reversible drive means for transporting a second tape received by said recorder in opposite directions over a range of positions adjacent said second set of transducers, graphic recording means responsive to applied signals for producing a graphic display, an acoustic transducer responsive to applied signals for producing an audible signal, switching means settable to first and second states, means controlled by said switching means in its first state for connecting a first transducer of said first set to said graphic recording means and connecting a second transducer of said first set to said acoustic transducer, means controlled by said switching means in its second state for connecting a first transducer of said second set to said graphic recording means and connecting a second transducer of said second set to said acoustic transducer, and sensing means responsive to the positions of tapes received by said recorder and actuated by said switching means in its first state for controlling said second drive means to transport the second tape to a position relative to said second set of transducers determined by the position of the first tape relative to said first set of transducers.

Claim 5

The apparatus of claim 2, in which said sensing means comprises a third transducer of said first set for reproducing first address signals recorded on the first tape, a first register for storing a first location signal determined by the first address signals, a third transducer of said second set for reproducing second address signals recorded on the second tape, a second register for storing a second location signal determined by said second address signals, and means responsive to the signals stored in said registers for controlling said second drive means to bring said stored signals into agreement.

Claim 6

The apparatus of claim 3, further comprising manually operable means for producing a third location signal, and means controlled by said switching means in its second state, said second reigster, and said manually operable means for controlling said second drive means to bring the signal stored in said second register into agreement with said third location signal.

Claim 7

The apparatus of claim 4, further comprising means controlled by said switching means in its first state, said register, and said manually operable means for controlling said first drive means to bring the signal stored in said first register into agreement with said third location signal.

Claim 8

The apparatus of claim 2, in which said sensing means comprises a first position transducer adapted to engage a first tape received by said recorder and produce a first position signal in accordance with the position of the first tape relative to said first set of transducers, a second position transducer adapted to engage a second tape received by said recorder and produce a second position signal in accordance with the position of the second tape relative to said second set of transducers, and means responsive to said position signals for controlling said second drive means to bring said position signals into agreement.

Claim 9

An interactive teaching system, comprising a lecture record on which signals are recorded representing a lecture together with a series of address signals distributed in sequence through the lecture, an answer record on which a series of signals representing answers to questions that may be raised by the lecture are recorded in a spaced sequence interspersed with a series of address signals in one-to-one correspondence with the series of address signals on said lecture record, first transducers means for reproducing signals from a relatively movIng record, first drive means adapted to engage said lecture record and move it relative to said first transducer means over a predetermined path, second transducer means for reproducing signals from a relatively moving record, second drive means adapted to engage said second record and operable to move said second record relative to said second transducer means over a predetermined path, switching means settable to first and second states, an acoustic transducer, first register means controlled by address signals reproduced by said first transducer means for storing a signal representing the current location of said first record relative to said first transducer means when said first record is engaged by said first drive means, second register means controlled by address signals reproduced by said second transducer means for storing a signal representing the current location of said second record relative to said first transducer means when said second record is engaged with said second drive means, means controlled by said switching means for connecting said first or said second transducer means to said acoustic transducer according as said switching means is in its first or its second state, respectively, and means actuated by said switching means in its first state and controlled by said first and second register means for operating said second drive means to move said second record relative to said second transducer means until the signals stored in said register means are in agreement.

Claim 10

An interactive teaching system, comprising a lecture record on which signals are recorded representing a lecture together with a series of address signals distributed in sequence through the lecture, an answer record on which a series of signals representing answers to questions that may be raised by the lecture are recorded in a spaced sequence interspersed with a series of address signals in one-to-one correspondence with the series of address signals on said lecture record, first transducers means for reproducing signals from a relatively movIng record, first drive means adapted to engage said lecture record and move it relative to said first transducer means over a predetermined path, second transducer means for reproducing signals from a relatively moving record, second drive means adapted to engage said second record and operable to move said second record relative to said second transducer means over a predetermined path, switching means settable to first and second states, an acoustic transducer, first register means controlled by address signals reproduced by said first transducer means for storing a signal representing the current location of said first record relative to said first transducer means when said first record is engaged by said first drive means, second register means controlled by address signals reproduced by said second transducer means for storing a signal representing the current location of said second record relative to said first transducer means when said second record is engaged with said second drive means, means controlled by said switching means for connecting said first or said second transducer means to said acoustic transducer according as said switching means is in its first or its second state, respectively, and means actuated by said switching means in its first state and controlled by said first and second register means for operating said second drive means to move said second record relative to said second transducer means until the signals stored in said register means are in agreement.

Claim 11

An interactive teaching system, comprising a lecture record on which signals are recorded representing a lecture together with a series of address signals distributed in sequence through the lecture, and at least one comment signal at a predetermined point in the lecture, a first set of said signals identifying the locations of predetermined points in the lecture, an answer record on which a series of signals representing answers to questions that may be raised by the lecture are recorded in a spaced sequence interspersed with recorded signals representing at least one comment which may be an answer to a question that may be raised by the lecture, said answer and comment being interspersed with a series of address signals in one-to-one correspondence with the series of address signals on said lecture record, each of the address signals next preceding an answer being in a second set, each of said address signals preceding a comment in a third set, said sets being mutually non-intersecting, first transducer means for reproducing signals from a relatively moving record, first drive means adapted to engage said lecture record and move it relative to said first transducer means over a predetermined path, second transducer means for reproducing signals from a relatively moving record, second drive means adapted to engage said second record and operable to move said second record relative to said second transducer means over a predetermined path, switching means settable to first and second states, an acoustic transducer, first register means controlled by address signals reproduced by said first transducer means for storing a signals representing the current location of said first record relative to said first transducer means when said first record is engaged by said first drive means, second register means controlled by address signals reproduced by said second transducer means for storing a signal representing the current location of said second record relative to said second transducer means when said second record is engaged with said second drive means, means controlled by said switching means for connecting said first or said second transducer means to said acoustic transducer according as said switching means is in its first or its second state, respectively, means actuated by said switching means in its first state and controlled by said first and second register means for operating said second drive means to move said second record relative to said second transducer means until the Signals stored in said register means are in agreement, and means responsive to a comment signal reproduced by said first transducer means for setting said switching means to its second state.

Claim 12

An interactive teaching system, comprising a lecture record on which signals are recorded representing a lecture together with a series of address signals distributed in sequence through the lecture, and at least one comment signal at a predetermined point in the lecture, a first set of said signals identifying the locations of predetermined points in the lecture, an answer record on which a series of signals representing answers to questions that may be raised by the lecture are recorded in a spaced sequence interspersed with recorded signals representing at least one comment which may be an answer to a question that may be raised by the lecture, said answer and comment being interspersed with a series of address signals in one-to-one correspondence with the series of address signals on said lecture record, each of the address signals next preceding an answer being in a second set, each of said address signals preceding a comment in a third set, said sets being mutually non-intersecting, first transducer means for reproducing signals from a relatively moving record, first drive means adapted to engage said lecture record and move it relative to said first transducer means over a predetermined path, second transducer means for reproducing signals from a relatively moving record, second drive means adapted to engage said second record and operable to move said second record relative to said second transducer means over a predetermined path, switching means settable to first and second states, an acoustic transducer, first register means controlled by address signals reproduced by said first transducer means for storing a signals representing the current location of said first record relative to said first transducer means when said first record is engaged by said first drive means, second register means controlled by address signals reproduced by said second transducer means for storing a signal representing the current location of said second record relative to said second transducer means when said second record is engaged with said second drive means, means controlled by said switching means for connecting said first or said second transducer means to said acoustic transducer according as said switching means is in its first or its second state, respectively, means actuated by said switching means in its first state and controlled by said first and second register means for operating said second drive means to move said second record relative to said second transducer means until the Signals stored in said register means are in agreement, and means responsive to a comment signal reproduced by said first transducer means for setting said switching means to its second state.

Claim 13

In combination, a first supply reel, a first takeup reel, a lecture tape having a lecture recorded thereon and opposite ends connected one to said first supply reel and one to said first takeup reel for movement therebetween in opposite directions relative to a first playback station upon rotation of said first reel, a second supply reel, a second takeup reel, an answer tape having a series of answers to questions that may be raised by the lecture recorded thereon and opposite ends connected one to said second supply reel and one to said second takeup reel for movement therebetween in opposite directions relative to a second playback station upon rotation of said second reels, first means for rotating said first reels, second means for rotating said second reels, means for selectively playing said lecture tape or said answer tape, and means effective when said lecture tape is being played for rotating said second reels to move said answer tape to positions relative to said second playback station determined by the position of said lecture tape relative to said first playback station.

Claim 14

In combination, a first supply reel, a first takeup reel, a lecture tape having a lecture recorded thereon and opposite ends connected one to said first supply reel and one to said first takeup reel for movement therebetween in opposite directions relative to a first playback station upon rotation of said first reel, a second supply reel, a second takeup reel, an answer tape having a series of answers to questions that may be raised by the lecture recorded thereon and opposite ends connected one to said second supply reel and one to said second takeup reel for movement therebetween in opposite directions relative to a second playback station upon rotation of said second reels, first means for rotating said first reels, second means for rotating said second reels, means for selectively playing said lecture tape or said answer tape, and means effective when said lecture tape is being played for rotating said second reels to move said answer tape to positions relative to said second playback station determined by the position of said lecture tape relative to said first playback station.

Claim 15

In an interactive teaching system, the combination comprising a lecture record on which a lecture and a first series of address signals at predetermined points in said lecture are recorded, an answer record on which a series of answers to questions that may be raised by points in the lecture and a corresponding second series of address signals are recorded, at least a subset of said address signals on said answer record being located on said answer record at the beginnings of said answers, record playing means adapted to receive said records, said record playing means comprising first transducer means movable relative to said first record for reproducing signals recorded thereon, second transducer means movable relative to said second record for reproducing signals recorded thereon, a speaker, means for selectively connecting one or the other of said transducer means to said speaker to reproduce lecture or answer signals from said first or said second record, respectively, means controlled by both of said transducer means and responsive to said address signals on both of said records for sensing the relative positions of said records relative to their associated transducer means, and means controlled by said sensing means to move said answer record relative to said second transducer means to a position determined by the position of said lecture record relative to said first transducer means while said first transducer means is connected to said speaker.

Claim 16

In an interactive teaching system, the combination comprising a lecture record on which a lecture and a first series of address signals at predetermined points in said lecture are recorded, an answer record on which a series of answers to questions that may be raised by points in the lecture and a corresponding second series of address signals are recorded, at least a subset of said address signals on said answer record being located on said answer record at the beginnings of said answers, record playing means adapted to receive said records, said record playing means comprising first transducer means movable relative to said first record for reproducing signals recorded thereon, second transducer means movable relative to said second record for reproducing signals recorded thereon, a speaker, means for selectively connecting one or the other of said transducer means to said speaker to reproduce lecture or answer signals from said first or said second record, respectively, means controlled by both of said transducer means and responsive to said address signals on both of said records for sensing the relative positions of said records relative to their associated transducer means, and means controlled by said sensing means to move said answer record relative to said second transducer means to a position determined by the position of said lecture record relative to said first transducer means while said first transducer means is connected to said speaker.

Claim 17

The apparatus of claim 10, further comprising manual means for producing a requested address signal in said second series, and means controlled by said manual means and said sensing means for moving said answer record relative to said second transducer means to a position determined by said requested address signal.

Claim 18

The apparatus of claim 11, further comprising a lecture map on which are perceptibly recorded an outline of said lecture, a list of questions corresponding to said recorded answers, means for associating each question with a point in said lecture that may raise the question, and means identifying each of said subset of address signals associated with a different one of said questions.

Claim 19

The apparatus of claim 12, further comprising a graphic recorder responsive to applied position signals for producing a graphic display, and in which at least one set of position signals is recorded on at least one of said records, and further comprising coupling means comprising at least one of said transducer means for applying said position signals to said recorded when the record on which said position signals are recorded is being reproduced by said speaker.

Claim 20

The apparatus of claim 13, in which said position sIgnals are frequency modulated, and in which a reference signal at constant frequency is recorded simultaneously with said position signal for reproduction therewith by said transducer means, and further comprising means responsive to said reproduced reference signal for compensating said position signals for wow and flutter frequency deviations while applying said position signals to said recorder.

Claim 21

The apparatus of claim 11, further comprising a graphic recorder responsive to applied position signals for producing a graphic display, and in which at least one set of position signals is recorded on at least one of said records, and further comprising coupling means comprising at least one of said transducer means for applying said position signals to said recorder when the record on which said position signals are recorded is being reproduced by said speaker.

Claim 22

The apparatus of claim 15, in which said position signals are frequency modulated, and in which a response signal at constant frequency is recorded simultaneously with said position signals for reproduction therewith by said transducer means, and further comprising means responsive to said reproduced reference signal for compensating said position signals for wow and flutter frequency deviations while applying said position, signals to said recorded.

Claim 23

In an interactive communication system, the combination comprising a lecture tape on which a lecture is recorded, a series of lecture address signals recorded on said lecture tape at locations identifying selected portions of said lecture, an answer tape on which a series of answers to questions that may be raised by said lecture are recorded in spaced sequential locations, a series of answer address signals recorded on said answer tape at locations identifying the beginning of each recorded answer, a tape recorder comprising switching means for selectively reproducing signals recorded on two tapes and adapted to receive said lecture and said answer tapes, means controlled by said address signals and said switching means for moving said answer tape to a location correlated with the position of said lecture tape while said tape recorder is reproducing said lecture, manual means for producing a requested address signal in said series, and means controlled by said manual means and said answer address signals for moving said answer tape to the location at which the answer corresponding to said requested address signal begsins.

Claim 24

In an interactive communication system, the combination comprising a lecture tape on which a lecture is recorded, a series of lecture address signals recorded on said lecture tape at locations identifying selected portions of said lecture, an answer tape on which a series of answers to questions that may be raised by said lecture are recorded in spaced sequential locations, a series of answer address signals recorded on said answer tape at locations identifying the beginning of each recorded answer, a tape recorder comprising switching means for selectively reproducing signals recorded on two tapes and adapted to receive said lecture and said answer tapes, means controlled by said address signals and said switching means for moving said answer tape to a location correlated with the position of said lecture tape while said tape recorder is reproducing said lecture, manual means for producing a requested address signal in said series, and means controlled by said manual means and said answer address signals for moving said answer tape to the location at which the answer corresponding to said requested address signal begsins.

Claim 25

The apparatus of claim 17, further comprising a lecture map on which are perceptibly recorded an outline of said lecture, a list of questions corresponding to said recorded answers, means for associating each question with a point in the lecture that may raise the question, and means identifying the address signal at the location at which the answer to the question begins associated with each question.

Claim 26

The apparatus of claim 17, further comprising a graphic recorder responsive to applied position signals for producing a graphic display, and in which at least one set of position signals is recorded on at least one of said tapes, and further comprising coupling means comprising said tape recorder for applying said position signals to said graphic recorder when the tape on which said position signals is recorded is being reproduced by said tape recorded.

Claim 27

The apparatus of claim 19, in which said position signals are frequency modulated, and in which a response signal at constant frequency is recorded simultaneously with said position signal for reproduction therewith by said transducer means, and further comprising means responsive to said reproduced reference signal for compensating said position signals for wow and flutter frequency deviations while applying said position signals to said graphic recorder.

Claim 28

The apparatus of claim 21, further comprising a lecture map on which are perceptibly recorded an outline of said lecture, a list of questions corresponding to said recorder answers, means for associating each quesTion with a point in said lecture that may raise the question, and means identifying each of said answer address signals associated with a different on of said questions.

Claim 29

In an interactive teaching system, the combination comprising a tape recorder adapted to receive two tapes, said tape recorder comprising a first set of transducers for reproducing signals recorded on a first tape, a second set of transducers for reproducing signals recorded on a second tape, first reversible drive means for transporting a first tape received by said recorder in opposite directions over a range of positions adjacent said first set of transducers, second reversible drive means for transporting a second tape received by said recorder in opposite directions over a range of positions adjacent said second set of transducers, graphic recording means responsive to applied signals for producing a graphic display, an acoustic transducer responsive to applied signals for producing an audible signal, switching means settable to first and second states, means actuated by said switching means in its first state for connecting a first transducer of said first set to said graphic recording means and connecting a second transducer of said first set to said acoustic transducer, means actuated by said switching means in its second state for connecting a first transducer of said second set to said graphic recording means and connecting a second transducer of said second set to said acoustic transducer, means responsive to the position of a first tape received by said recorder relative to said first transducer means for producing a first signal, means responsive to the position of a second tape received by said recorder relative to said second transducer means for producing a second signal, manually operable means for producing a third signal, means actuated by said switching means in its first state and responsive to said first and third signals for operating said first drive means to move the first tape to a position relative to said first transducer means determined by said third signal, and means actuated by said switching means in its second state and responsive to said first and second signals for operating said first drive means to move the first tape to a position relative to said first transducer means determined by said second signal.

Claim 30

In an interactive teaching system, the combination comprising a tape recorder adapted to receive two tapes, said tape recorder comprising a first set of transducers for reproducing signals recorded on a first tape, a second set of transducers for reproducing signals recorded on a second tape, first reversible drive means for transporting a first tape received by said recorder in opposite directions over a range of positions adjacent said first set of transducers, second reversible drive means for transporting a second tape received by said recorder in opposite directions over a range of positions adjacent said second set of transducers, graphic recording means responsive to applied signals for producing a graphic display, an acoustic transducer responsive to applied signals for producing an audible signal, switching means settable to first and second states, means actuated by said switching means in its first state for connecting a first transducer of said first set to said graphic recording means and connecting a second transducer of said first set to said acoustic transducer, means actuated by said switching means in its second state for connecting a first transducer of said second set to said graphic recording means and connecting a second transducer of said second set to said acoustic transducer, means responsive to the position of a first tape received by said recorder relative to said first transducer means for producing a first signal, means responsive to the position of a second tape received by said recorder relative to said second transducer means for producing a second signal, manually operable means for producing a third signal, means actuated by said switching means in its first state and responsive to said first and third signals for operating said first drive means to move the first tape to a position relative to said first transducer means determined by said third signal, and means actuated by said switching means in its second state and responsive to said first and second signals for operating said first drive means to move the first tape to a position relative to said first transducer means determined by said second signal.

Claim 31

In an interactive teaching system, the combination comprising a lecture record on which a lecture is recorded, an answer record on which a series of answers to questions that may be raised by points in the lecture are recorded, record playing means adapted to receive said records, said record playing means comprising a first transducer movable relative to said lecture record for reproducing signals recorded thereon, a second transducer movable relative to said answer record for reproducing signals recorded thereon, a speaker, means for selectively connecting one or the other of said transducers to said speaker to reproduce signals from said lecture or said answer record, respectively, means for sensing the relative positions of said records relative to their associated transducer, and means controlled by said sensing means to move said answer record relative to said second transducer to a position determined by the position of said lecture record relative to said first transducer while said first transducer is connected to said speaker, in which said lecture record comprises a lecture tape on which said lecture is recorded, in which said answer record comprises an answer tape on which said answers are recorded in spaced sequential locations, in which said record playing means is a tape recorder adapted to receive said lecture tape and said answer tape for said movement relative to said transducer, in which said means for sensing the relative positions of said records comprises a series of lecture address signals recorded on said lecture tapes at locations identifying selected portions of said lecture, a series of answer address signals rEcorded on said answer tape at locations identifying the beginning of each recorded answer, and signal detecting means controlled by said address signals, and in which said means controlled by said sensing means comprises means controlled by said address signal detecting means and means for connecting said transducers to said speaker for moving said answer tape relative to said second transducer to a position determined by the position of said lecture tape relative to said second transducer while said first transducer is connected to said speaker.

Claim 32

In an interactive teaching system, the combination comprising a lecture record on which a lecture is recorded, an answer record on which a series of answers to questions that may be raised by points in the lecture are recorded, record playing means adapted to receive said records, said record playing means comprising a first transducer movable relative to said lecture record for reproducing signals recorded thereon, a second transducer movable relative to said answer record for reproducing signals recorded thereon, a speaker, means for selectively connecting one or the other of said transducers to said speaker to reproduce signals from said lecture or said answer record, respectively, means for sensing the relative positions of said records relative to their associated transducer, and means controlled by said sensing means to move said answer record relative to said second transducer to a position determined by the position of said lecture record relative to said first transducer while said first transducer is connected to said speaker, in which said lecture record comprises a lecture tape on which said lecture is recorded, in which said answer record comprises an answer tape on which said answers are recorded in spaced sequential locations, in which said record playing means is a tape recorder adapted to receive said lecture tape and said answer tape for said movement relative to said transducer, in which said means for sensing the relative positions of said records comprises a series of lecture address signals recorded on said lecture tapes at locations identifying selected portions of said lecture, a series of answer address signals rEcorded on said answer tape at locations identifying the beginning of each recorded answer, and signal detecting means controlled by said address signals, and in which said means controlled by said sensing means comprises means controlled by said address signal detecting means and means for connecting said transducers to said speaker for moving said answer tape relative to said second transducer to a position determined by the position of said lecture tape relative to said second transducer while said first transducer is connected to said speaker.

Claim 33

An interactive communication system, comprising a first record on which signals representing a first audiovisual presentation are recorded together with first address signals identifying predetermined locations on said first record, a second record on which signals representing a series of other audiovisual presentations are recorded together with second address signals identifying the location of each of said other audiovisual presentation signals on said second record, first playback means movable relative to said first record and selectively operable to reproduce signals recorded thereon, second playback means movable relative to second record and selectively operable to reproduce the signals recorded thereon, first switching means settable to first and second states, an audiovisual system responsive to applied signals representing an audiovisual presentation for producing the audiovisual presentation represented by the applied signals, means actuated by said first switching means in its first state for applying signals from said first record to said audiovisual system, second switching means settable to first and second states, means actuated by said first switching means in its second state and said second switching means in its first state for applying signals from said second playback means representing audiovisual presentations to said audiovisual system, manually operable means for producing a desired address signal, means actuated by said first switching means in its second state and said second switching means in its first state and controlled by address signals produced by said second playback means and said desired address signal for moving said second playback means relative to said second record to selectively reproduce the audiovisual presentation identified by said desired address signal, means for sensing said first and second address signals, and means actuated by said first switching means in its first state and said second switching means in its second state and controlled by said sensing means in response to said first and second address signals for moving said second playback means relative to said second record to positions correlated with the positions of said first record while said first record is supplying signals to said audiovisual system, in which said first audiovisual presentation is a lecture accompanied by at least one graphic display, in which said second audiovisual presentation is a series of answers to questions that may be raised by points in the lecture accompanied by at least one graphic display, said recorded signals comprising audio signals and position signals determinative of said graphic display, and in which said audiovisual system comprises a speaker, a graphic recorder responsive to applied position signals for producing a graphic display, and a lecture map on which are perceptibly recorded an outline of said lecture, a list of questions corresponding to said recorded answers, means for associating each question with a point in said lecture that may raise the question, and means identifying each of said second address signals associated with a different one of said questions, said first switching means in its first state applying signals from said first record to said speaker and said graphic recorder, and said means actuated by said first switching means in its second state and said second switching means in its first state comprising means for applying signals from said second rEcord to said speaker and said graphic recorder.

Claim 34

An interactive communication system, comprising a first record on which signals representing a first audiovisual presentation are recorded together with first address signals identifying predetermined locations on said first record, a second record on which signals representing a series of other audiovisual presentations are recorded together with second address signals identifying the location of each of said other audiovisual presentation signals on said second record, first playback means movable relative to said first record and selectively operable to reproduce signals recorded thereon, second playback means movable relative to second record and selectively operable to reproduce the signals recorded thereon, first switching means settable to first and second states, an audiovisual system responsive to applied signals representing an audiovisual presentation for producing the audiovisual presentation represented by the applied signals, means actuated by said first switching means in its first state for applying signals from said first record to said audiovisual system, second switching means settable to first and second states, means actuated by said first switching means in its second state and said second switching means in its first state for applying signals from said second playback means representing audiovisual presentations to said audiovisual system, manually operable means for producing a desired address signal, means actuated by said first switching means in its second state and said second switching means in its first state and controlled by address signals produced by said second playback means and said desired address signal for moving said second playback means relative to said second record to selectively reproduce the audiovisual presentation identified by said desired address signal, means for sensing said first and second address signals, and means actuated by said first switching means in its first state and said second switching means in its second state and controlled by said sensing means in response to said first and second address signals for moving said second playback means relative to said second record to positions correlated with the positions of said first record while said first record is supplying signals to said audiovisual system, in which said first audiovisual presentation is a lecture accompanied by at least one graphic display, in which said second audiovisual presentation is a series of answers to questions that may be raised by points in the lecture accompanied by at least one graphic display, said recorded signals comprising audio signals and position signals determinative of said graphic display, and in which said audiovisual system comprises a speaker, a graphic recorder responsive to applied position signals for producing a graphic display, and a lecture map on which are perceptibly recorded an outline of said lecture, a list of questions corresponding to said recorded answers, means for associating each question with a point in said lecture that may raise the question, and means identifying each of said second address signals associated with a different one of said questions, said first switching means in its first state applying signals from said first record to said speaker and said graphic recorder, and said means actuated by said first switching means in its second state and said second switching means in its first state comprising means for applying signals from said second rEcord to said speaker and said graphic recorder.