US3579861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-channel electronic question-response system
Assignee: BRD Inc
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Filing: 1969-02-06
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Granted: 1971-05-25
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Expires: 1989-02-06
Abstract
Abstract The teaching response system disclosed entails a control unit used by an instructor and a plurality of response unit used by individual students. The correct answer to a question is selected on a multiposition switch in the control unit and the students select their answers on similar multiposition switches in the response units. A timed correct answer signal is transmitted to the response units, wherein the students'' answers are individually compared with the indicated correct answer and individual correctness signals are derived and transmitted over a single communication channel in sequence from the respective response units back to the control unit, in which they are recorded and displayed. The system relies upon time coincidence for determining correctness of the answers selected on the response units and sequencing means for monitoring the individual correctness signals.
Inventors
- 👤 Thomas E Hallett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:27
CPC Classifications
G; G09; G09B; G09B7/00; G09B7/06; G09B7/07; G09B7/073
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
129 words
A single-channel electronic question-response system comprising: a. a control unit including means for indicating a correct answer to a question and transmitting a correct answer signal to said response units simultaneously, b. a plurality of response units each incluDing means for indicating a selected answer, means for receiving said correct answer signal, and means for comparing said selected answer and correct answer to provide a correctness indication signal, and c. single channel communication means coupling said control unit with said response units including sequencing means for transmitting respective correctness indication signals from said response units individually to said control unit in a predetermined sequence, d. said control unit further including means responsive in said predetermined sequence to said respective correctness indication signals for displaying separate correctness indications corresponding thereto.
Claim 2
Dependent Claim
129 words
A single-channel electronic question-response system comprising: a. a control unit including means for indicating a correct answer to a question and transmitting a correct answer signal to said response units simultaneously, b. a plurality of response units each incluDing means for indicating a selected answer, means for receiving said correct answer signal, and means for comparing said selected answer and correct answer to provide a correctness indication signal, and c. single channel communication means coupling said control unit with said response units including sequencing means for transmitting respective correctness indication signals from said response units individually to said control unit in a predetermined sequence, d. said control unit further including means responsive in said predetermined sequence to said respective correctness indication signals for displaying separate correctness indications corresponding thereto.
Claim 3
Dependent Claim
53 words
The system defined in claim 1 wherein said means for indicating and transmitting a correct answer signal comprises means for providing a timed control signal establishing a predetermined time interval and means for superimposing on said control signal a correct answer signal selectively timed within said interval in accordance with said correct answer.
Claim 4
Dependent Claim
19 words
means coupled with said response switch means for providing a signal timed in accordance with the answer selected thereon,
Claim 5
Dependent Claim
19 words
means coupled with said response switch means for providing a signal timed in accordance with the answer selected thereon,
Claim 6
Dependent Claim
24 words
means for transmitting to said response units a correct answer signal timed in accordance with the correct answer selected on said control switch means,
Claim 7
Dependent Claim
24 words
means for transmitting to said response units a correct answer signal timed in accordance with the correct answer selected on said control switch means,
Claim 8
Dependent Claim
15 words
means for receiving from said response units signals indicating correctness of answers selected thereon, and
Claim 9
Dependent Claim
15 words
means for receiving from said response units signals indicating correctness of answers selected thereon, and
Claim 10
Dependent Claim
11 words
means for receiving said correct answer signal from said control unit,
Claim 11
Dependent Claim
11 words
means for receiving said correct answer signal from said control unit,
Claim 12
Dependent Claim
55 words
The system defined in claim 2 wherein said response unit includes means responsive to said control signal, said selected answer indicating means comprises means for selecting a time within said interval indicating the selected answer, and said comparing means comprises means for determining time coincidence between said selected time and said timed correct answer signal.
Claim 13
Dependent Claim
109 words
The system defined in claim 2 wherein said means for providing a timed control signal comprises a pulse generator and a counter having a plurality of outputs successively energized by pulses from said generator; said correct answer indicating and transmitting means comprises control switch means having an output and selectable input means operable to connect said output to selected one of said counter outputs in accordance with the correct answer; and inhibit means coupled between said pulse generator and said transmitting means and responsive to the output of said control switch means to inhibit transmission of a pulse to said response units at a time indicating said correct answer.
Claim 14
Dependent Claim
25 words
coincidence determining means for detecting time coincidence between said correct answer signal and said selected answer signal and operable to provide a correctness indication, and
Claim 15
Dependent Claim
25 words
coincidence determining means for detecting time coincidence between said correct answer signal and said selected answer signal and operable to provide a correctness indication, and
Claim 16
Dependent Claim
12 words
means for displaying said correctness signals; b. said response units each including
Claim 17
Dependent Claim
12 words
means for displaying said correctness signals; b. said response units each including
Claim 18
Dependent Claim
121 words
The system defined in claim 4 wherein said response unit includes missing pulse detector means and a pulse counter adapted to receive pulses transmitted by said control unit and having a plurality of outputs successively energized thereby; and wherein said selected answer indicating means comprises response switch means having an output and selectable input means operable to connect said output to a selected one of said response unit pulse counter outputs in accordance with the answer selected, and said coincidence determining means is coupled to said missing pulse detector and to the response switch means output to respond to a predetermined time relationship between the missing pulse inhibited by said inhibit means and energization of the selected response unit counter output.
Claim 19
Dependent Claim
16 words
means for transmitting to said control unit a correctness signal in accordance with said correctness indication.
Claim 20
Dependent Claim
16 words
means for transmitting to said control unit a correctness signal in accordance with said correctness indication.
Claim 21
Dependent Claim
100 words
The system defined in claim 13 wherein said displaying means includes a plurality of inputs corresponding respectively to said response units and each coupled to said sequencing means; and wherein said sequencing means includes timing control means coupled to said displaying means inputs and operable to render them sequentially and individually responsive to said communication means, and in each response unit a transmission control means responsive to the timing control means in said control unit to effect transmission of the individual correctness signal of said response unit in time coincidence with responsiveness of the corresponding input of said displaying means.
Claim 22
Dependent Claim
122 words
The system defined in claim 6 wherein said timing control means includes: a pulse generator; a pulse counter having a plurality of outputs successively energized by pulses supplied by said generator; and a plurality of AND gates each having a first input coupled to said communication means, a second input coupled to one output of said counter, and an output coupled to an input of said display means; and wherein each response unit iNcludes a pulse counter coupled to receive pulses from said control unit and having a plurality of outputs successively energized thereby; said response units having means responsively coupled to respectively different response unit counter outputs and controlled by energization thereof to transmit said correctness signal in said predetermined sequence.
Claim 23
Dependent Claim
19 words
An electronic question-response system comprising a control unit and a plurality of response units; a. said control unit including
Claim 24
Dependent Claim
19 words
An electronic question-response system comprising a control unit and a plurality of response units; a. said control unit including
Claim 25
Dependent Claim
131 words
The system defined in claim 8 wherein said means for transmitting a timed correct answer signal includes: a. a pulse generator, b. a pulse counter coupled to receive pulses from said generator and having a plurality of outputs successively energized thereby, c. said control switch means having an output and selectable input means operable to connect said output to a selected one of said pulse counter outputs, d. control signal output means coupled to said pulse generator and operable in response thereto to transmit to said response units a control signal defining a predetermined time interval, and e. means interposed between said pulse generator and said control signal output means and responsive to said control switch means output to modulate said control signal upon energization of the selected pulse counter output.
Claim 26
Dependent Claim
92 words
The system defined in claim 9 wherein: A. said correct answer receiving means including means responsive to said control signal, b. said response switch means includes means for providing said timed selected answer signal within said predetermined time interval, c. each response unit further includes detector means coupled to said correct signal receiving means for detecting the modulation of said control signal, and d. said coincidence determining means is coupled to said response switch means to said detector means to determine time coincidence between said modulation and said timed selected answer signal.
Claim 27
Dependent Claim
62 words
The system defined in claim 10 wherein: a. said control signal output means comprises means for transmitting pulses from said pulse generator to said response units, b. said interposed modulation means comprises an inhibit circuit operable to inhibit transmission of a pulse in response to energization of the selected pulse counter output, and c. said detector means comprises a missing pulse detector.
Claim 28
Dependent Claim
160 words
The system defined in claim 9 wherein: a. said control signal output means comprises means for transmitting pulses from said pulse generator to said response units, b. each response unit includes a pulse counter coupled to said correct answer signal receiving means and having a plurality of outputs successively energized by said transmitted pulses and c. each response unit further includes means responsive to a different output of the pulse counter therein and operable to control the correctness signal transmitting means, whereby said correctness signals are transmitted in sequence to said control unit, and d. said means for displaying correctness signals includes a plurality of inputs corresponding respectively to said response units and each coupled to said correctness signal receiving means, and means coupled to said display means inputs and respective outputs of the pulse counter of said control unit for rendering said display means inputs sequentially responsive to said receiving means upon successive energization of said pulse counter outputs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |