US3718774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instructional tape recorder for preventing erroneous erasure on a double track magnetic tape using two sensing means
Assignee: Panasonic Holdings Corp
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Filing: 1970-08-13
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Granted: 1973-02-27
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Expires: 1990-08-13
Abstract
Abstract An instructional tape recorder comprises a recording and a reproducing means for recording and reproducing an instructional tape which has an instructional program recorded intermittently thereon and an oral response of a student made to said instructional program. Said instructional tape recorder can be used as a conventional tape recorder and as an instructional tape recorder by operating a selecting switch. Said magnetic tape having said instructional program is protected from an erroneous erasure by detecting a break out lug made in the back edge of a tape case containing said magnetic tape. Said magnetic tape is divided into two recording tracks, and each of which is used for recording and reproducing said instructional program and an oral response of a student.
Inventors
- 👤 M Kosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:32
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G09; G09B; G09B5/00; G09B5/04; G11B15/05; G11B15/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
274 words
An instructional tape recorder adapted for use with a tape case containing a magnetic tape having an upper and a lower track therein and having right and left breakout lugs in the back edge thereof, comprising in combination, a driving means for moving said magnetic tape, a recording and reproducing means, a recording switch actuated by a recording button for controlling said recording and reproducing means to record and reproduce an oral signal, an electrical switch to change the track used for recording said oral signal from said upper track to said lower track of said magnetic tape, a first sensing means and a second sensing means for detecting the presence of said right and left breakout lugs, respectively, a first locking means connected with said first sensing means for selectively locking said recording button to prevent depression thereof, a second locking means connected with said second sensing means and said electrical switch for selectively locking said recording button to prevent depression thereof, whereby said first sensing means actuates said first locking means to prevent said recording button from being depressed when said right breakout lug is broken, and simultaneously said second sensing means actuates said second locking means in cooperation with said electrical switch in order to prevent said recording button from being depressed, either when said left breakout lug is broken and said electrical switch selects said lower track of said magnetic tape as the track used for recording said oral signal, or when said left breakout lug is not broken and said electrical switch selects said upper track of said magnetic tape as the track used for recording said oral signal.
Claim 2
Dependent Claim
274 words
An instructional tape recorder adapted for use with a tape case containing a magnetic tape having an upper and a lower track therein and having right and left breakout lugs in the back edge thereof, comprising in combination, a driving means for moving said magnetic tape, a recording and reproducing means, a recording switch actuated by a recording button for controlling said recording and reproducing means to record and reproduce an oral signal, an electrical switch to change the track used for recording said oral signal from said upper track to said lower track of said magnetic tape, a first sensing means and a second sensing means for detecting the presence of said right and left breakout lugs, respectively, a first locking means connected with said first sensing means for selectively locking said recording button to prevent depression thereof, a second locking means connected with said second sensing means and said electrical switch for selectively locking said recording button to prevent depression thereof, whereby said first sensing means actuates said first locking means to prevent said recording button from being depressed when said right breakout lug is broken, and simultaneously said second sensing means actuates said second locking means in cooperation with said electrical switch in order to prevent said recording button from being depressed, either when said left breakout lug is broken and said electrical switch selects said lower track of said magnetic tape as the track used for recording said oral signal, or when said left breakout lug is not broken and said electrical switch selects said upper track of said magnetic tape as the track used for recording said oral signal.
Claim 3
Dependent Claim
227 words
An instructional tape recorder adapted for use with a tape case containing a magnetic tape having an upper and lower track therein and having right and left breakout lugs in the back edge thereof, comprising in combination, a driving means for moving said magnetic tape, a recording and reproducing means, a recording switch actuated by a recording button for controlling said recording and reproducing means to record and reproduce an oral signal, an electrical switch to change the track used for recording said oral signal to said lower track from said upper track of said magnetic tape, a first sensing means and a second sensing means for detecting the presence of said right and left breakout lugs, respectively, a locking means connected with said first sensing means for selectively locking said recording button to prevent depression thereof, a connecting means connecting said second sensing means to said electrical switch for actuating said electrical switch, whereby said first sensing means actuates said locking means to prevent said recording button from being depressed when said right breakout lug is broken, and simultaneously said second sensing means actuates said electrical switch through said connecting means in order to select said upper track and said lower track of said magnetic tape as the track used for recording said oral signal when said left breakout lug is broken and not broken, respectively.
Claim 4
Dependent Claim
227 words
An instructional tape recorder adapted for use with a tape case containing a magnetic tape having an upper and lower track therein and having right and left breakout lugs in the back edge thereof, comprising in combination, a driving means for moving said magnetic tape, a recording and reproducing means, a recording switch actuated by a recording button for controlling said recording and reproducing means to record and reproduce an oral signal, an electrical switch to change the track used for recording said oral signal to said lower track from said upper track of said magnetic tape, a first sensing means and a second sensing means for detecting the presence of said right and left breakout lugs, respectively, a locking means connected with said first sensing means for selectively locking said recording button to prevent depression thereof, a connecting means connecting said second sensing means to said electrical switch for actuating said electrical switch, whereby said first sensing means actuates said locking means to prevent said recording button from being depressed when said right breakout lug is broken, and simultaneously said second sensing means actuates said electrical switch through said connecting means in order to select said upper track and said lower track of said magnetic tape as the track used for recording said oral signal when said left breakout lug is broken and not broken, respectively.
Claim 5
Dependent Claim
283 words
An instructional tape recorder adapted for use with a tape case containing a magnetic tape having an upper and a lower track therein and having right and left breakout lugs in the back edge thereof, comprising in combination, a dRiving means for moving said magnetic tape, a recording and reproducing means, a recording switch operated by a recording button for controlling said recording and reproducing means to record and reproduce an oral signal, a first electrical switch to change the track used for recording said oral signal from said upper track to said lower track of said magnetic tape, a first sensing means and a second sensing means for detecting the presence of said right and left breakout lugs respectively, a locking means connected with said first sensing means for selectively locking said recording button to prevent depression thereof, a second electrical switch connected with said second sensing means, an electrical network connected with said recording switch and said first and second electrical switches for stopping the recording function of said instructional tape recorder and simultaneously making a warning signal by sound and/or light, whereby said first sensing means actuates said locking means to prevent said recording button from being depressed when said right breakout lug is broken, and simultaneously said electrical network stops said recording function and makes said warning signal, either when said left breakout lug is broken and said first electrical switch selects said lower track of said magnetic tape as the track used for recording said oral signal, or when said left breakout lug is not broken and said first electrical switch selects said upper track of said magnetic tape as the track used for recording said oral signal.
Claim 6
Dependent Claim
283 words
An instructional tape recorder adapted for use with a tape case containing a magnetic tape having an upper and a lower track therein and having right and left breakout lugs in the back edge thereof, comprising in combination, a dRiving means for moving said magnetic tape, a recording and reproducing means, a recording switch operated by a recording button for controlling said recording and reproducing means to record and reproduce an oral signal, a first electrical switch to change the track used for recording said oral signal from said upper track to said lower track of said magnetic tape, a first sensing means and a second sensing means for detecting the presence of said right and left breakout lugs respectively, a locking means connected with said first sensing means for selectively locking said recording button to prevent depression thereof, a second electrical switch connected with said second sensing means, an electrical network connected with said recording switch and said first and second electrical switches for stopping the recording function of said instructional tape recorder and simultaneously making a warning signal by sound and/or light, whereby said first sensing means actuates said locking means to prevent said recording button from being depressed when said right breakout lug is broken, and simultaneously said electrical network stops said recording function and makes said warning signal, either when said left breakout lug is broken and said first electrical switch selects said lower track of said magnetic tape as the track used for recording said oral signal, or when said left breakout lug is not broken and said first electrical switch selects said upper track of said magnetic tape as the track used for recording said oral signal.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |