GB1354091A – Teaching system and devices
– Google Patents
GB1354091A – Teaching system and devices
– Google Patents
Teaching system and devices
Info
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
1973-01-15
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
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Joannou C J
Original Assignee
Joannou C J
Priority date (The priority date 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 date listed.)
1973-01-15
Filing date
1973-01-15
Publication date
1974-06-05
1973-01-15
Application filed by Joannou C J
filed
Critical
Joannou C J
1974-06-05
Publication of GB1354091A
publication
Critical
patent/GB1354091A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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.
GB1354091D
1973-01-15
1973-01-15
Teaching system and devices
Expired
GB1354091A
(en)
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)
* Cited by examiner, † Cited by third party
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)
* Cited by examiner, † Cited by third party
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
Similar Documents
Publication
Publication Date
Title
GB1227168A
(en)
1971-04-07
GB1364268A
(en)
1974-08-21
Electronic editing system for video tape recorders
GB1273749A
(en)
1972-05-10
Improvements in or relating to the slow motion picture reproduction in video tape recorders
GB1044054A
(en)
1966-09-28
Information recording and reproducing apparatus and method
JP2693417B2
(en)
1997-12-24
Recording and playback device
GB810111A
(en)
1959-03-11
Device for locating position of magnetic tape or wire recordings
GB1354091A
(en)
1974-06-05
Teaching system and devices
GB1497178A
(en)
1978-01-05
Control signal magnetic recording and/or reproducing apparatus
GB1131273A
(en)
1968-10-23
Video recorder and/or reproducer
GB1330666A
(en)
1973-09-19
Reproducing device
GB833278A
(en)
1960-04-21
Improvements in or relating to recording of reproducing apparatus
CA1111134A
(en)
1981-10-20
Cue recording system for magnetic recorder
GB1322295A
(en)
1973-07-04
Method of producing copy tape
JPS5786151A
(en)
1982-05-29
Tape recorder
JPS5680864A
(en)
1981-07-02
Tape for doll operating command recorder
FR2365853A1
(en)
1978-04-21
Rotary head video tape recorder – allows intermittent scanning of oblique recording tracks or scanning at different rates
JPS5745785A
(en)
1982-03-15
Voice signal noise eliminating circuit for magnetic record reproducing device
JPS61153891A
(en)
1986-07-12
Magnetic tape and magnetic recording reproducing device
GB683797A
(en)
1952-12-03
Magnetic head for sound recording and sound reproducing
JPS61220159A
(en)
1986-09-30
Recording and reproducing device
GB914069A
(en)
1962-12-28
Improvements in reproducing and recording-reproducing systems
GB854651A
(en)
1960-11-23
Improvements in and relating to the recording of television programmes
JPS5749942A
(en)
1982-03-24
Sound projector
JPS5478103A
(en)
1979-06-22
Cue signal recorder of magnetic recorder-reproducer
SU486353A1
(en)
1975-09-30
Magnetic recorder for mute
Legal Events
Date
Code
Title
Description
1974-10-02
PS
Patent sealed
1980-08-28
PCNP
Patent ceased through non-payment of renewal fee
