GB1354091A - Teaching system and devices - Google Patents
Teaching system and devicesInfo
- Publication number
- GB1354091A GB1354091A GB1354091DA GB1354091A GB 1354091 A GB1354091 A GB 1354091A GB 1354091D A GB1354091D A GB 1354091DA GB 1354091 A GB1354091 A GB 1354091A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stylus
- signals
- fed
- input
- tape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/022—Draughting machines or drawing devices for keeping parallelism automatic
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/06—Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
1354091 Automatic electric control C J JOANNOU 15 Jan 1973 [10 Jan 1972] 2023/73 Heading G3N [Also in Divisions G1 and G5] Teaching apparatus whereby a lecture, including voice and drawings, is recorded on magnetic tape, and subsequently reproduced, comprises a stylus 1 movable over a sheet of paper 3 in x and y directions, a cassette tape recorder 5, a microphone 8 and a loud speaker with a grill 10. As shown diagrammatically in Fig. 2 the stylus is driven by electric motors 12, 13, in x and y directions respectively, and signals indicative of the x and y co-ordinates of the stylus are derived from resistive transducers 15, 16. A solenoid 14 operates to lower the stylus by tilting its holder, whereupon a switch 17 is closed. Recording procedure is effected Fig. 3 (not shown) by the signals from 15, and 16 controlling oscillators 18, 19 whose frequencies are dependent on the transducer signals. An oscillator 20 is controlled by the switch 17 and the three oscillator inputs are fed to one input of the recorder whose other input is fed by the microphone. Reproducing is effected Fig.4 (not shown) by feeding the one output from the tape through filter 22, 23, 24. The output of filter 22 is fed to a convector 25 supplying one input of amplifier 28 whose other input is fed from the x potentiometer 15. The output of the amplifier feeds a motor 12 to control the stylus in the x direction and the potentiometer 15. Similarly the output of filter 23 controls y movement. Narrow band filter 24 controls a solenoid to move the stylus in the z direction. Switches on the stylus associated with the motors 12, 13 provide for "power assisted steering" for the recording procesure, diagrammatical representations of the switches being disclosed in Figs. 5-9 (not shown). In a modification Figs. 10-18 (not shown) two styli are provided, one for record and one for playback. As shown in Fig. 11, the x and y motors 12, 13 drive a carriage arrangement which includes a support 74 carrying 4 electrodes 64.. .. 67 which moves under a dielectric sheet 4 which carries the paper 3. In recording procedure as shown in Fig. 17 the x electrodes 65, 67 are capacitatively coupled with the stylus and act through amplifier 86 and motor 12 to equalize the amplifier input. Similarly the y electrodes 66, 68 operate, so that the electrodes are centred with respect to the stylus, and the appropriate x and y signals from potentiometers 15, 16 are fed to oscillators and thence are recorded. An alternative method of processing the signals derived from potentiometers 15, 16 is disclosed in Figs. 18 (not shown). These signals control the pulse widths of outputs from multivibrators, these outputs being differentiated and used to trigger a multi-vibrator 96, which is also triggered by a relative low frequency signal from 95. Hence after each signal from 95 the multivibrator 96 produces a train of 4 pulses. The intervals between these is related to the pulse widths at 92, 93, 94, i.e. the signals from potentiometers 15, 16, and the pulses are fed to the first track of the tape. In playback, these signals from the tape are decoded and fed to operate the x and y motors and the stylus Fig. 19 (not shown). In alternatives postulated in the specification, (a) a single track channel may be utilized for both sound and graphics, (b) use of phonograph records is envisaged.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB202373 | 1973-01-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1354091A true GB1354091A (en) | 1974-06-05 |
Family
ID=9732256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1354091D Expired GB1354091A (en) | 1973-01-15 | 1973-01-15 | Teaching system and devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1354091A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008138514A2 (en) * | 2007-05-16 | 2008-11-20 | Up Management Gmbh | Inscribing device |
CN113178104A (en) * | 2021-04-22 | 2021-07-27 | 闫化存 | English blackboard teaching equipment and control method thereof |
-
1973
- 1973-01-15 GB GB1354091D patent/GB1354091A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008138514A2 (en) * | 2007-05-16 | 2008-11-20 | Up Management Gmbh | Inscribing device |
WO2008138514A3 (en) * | 2007-05-16 | 2009-01-29 | Up Man Gmbh | Inscribing device |
CN113178104A (en) * | 2021-04-22 | 2021-07-27 | 闫化存 | English blackboard teaching equipment and control method thereof |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |