DE976753C - Electric locking device for magnetic recorders - Google Patents
Electric locking device for magnetic recordersInfo
- Publication number
- DE976753C DE976753C DEB13791A DEB0013791A DE976753C DE 976753 C DE976753 C DE 976753C DE B13791 A DEB13791 A DE B13791A DE B0013791 A DEB0013791 A DE B0013791A DE 976753 C DE976753 C DE 976753C
- Authority
- DE
- Germany
- Prior art keywords
- sound
- recording
- magnetic
- circuit
- sound carrier
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
- G11B15/06—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing auxiliary features on record carriers or containers, e.g. to stop machine near the end of a tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
- G11B15/04—Preventing, inhibiting, or warning against accidental erasing or double recording
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Description
Elektrische Verriegelungsvorrichtung für Magnettongeräte In der Technik magnetischer Tonaufzeichnungen werden kombinierte Geräte verwendet, die zur Aufzeichnung und Wiedergabe einer Nachricht auf bzw. von einem magnetischen, band- oder drahtförmigen, walzen- oder plattenförmigen Tonträger eingerichtet sind und einen Aufsprechkopf, einen Löschkopf und einen Hörkopf besitzen. Ein Betr iebsartenschalter erlaubt die Umschaltung zwischen den verschiedenen Verwendungsarten. Ein häufig auftretender Fehler bei der Verwendung dieser Geräte ist die Fehlbedienung des Betriebsartenschalters. Durch die Fehlbedienung, so wenn z. B. während der Wiedergabe auf »Aufnahme« oder »Löschen« geschaltet wird, wird die Tonaufzeichnung verdorben, weil die Darbietung ein Loch erhält, welches nicht mehr auszubessern ist. Besonders unangenehm ist dies bei wertvollen Originalen wie Archivaufnahmen, sprechenden Büchern usw.Electrical locking device for magnetic sound devices In technology Magnetic sound recordings are combined devices used for recording and playback of a message on or from a magnetic, tape or wire-shaped, cylindrical or plate-shaped sound carriers are set up and a recording head, have an erase head and a hearing head. An operating mode switch allows the Switching between the different types of use. A common one The error when using these devices is incorrect operation of the operating mode switch. Due to the incorrect operation, so if z. B. during playback on »Record« or "Delete" is switched, the sound recording will be spoiled because the performance receives a hole that cannot be repaired. This is particularly uncomfortable for valuable originals such as archive recordings, speaking books, etc.
Man hat diese Fehlermöglichkeit dadurch auszuschalten versucht, daß die Kassette eines z. B. drahtförmigen Magnettonträgers räumliche Merkmale erhielt,, durch die über mechanische und elektrische Mittel im Gerät in Form eines Fühlers oder Abtasters und eines Schalters der Oszillatorkreis unterbrochen wurde. Es sind auch Kontaktvorrich- Lungen für Tonwiedergabegeräte bekannt, die durch räumliche Merkmale, wie Perforationen am Tonträger selbst, gesteuert werden.Attempts have been made to eliminate this possibility of error in that the cassette of a z. B. wire-shaped magnetic sound carrier received spatial characteristics, by means of mechanical and electrical means in the device in the form of a probe or scanner and a switch, the oscillator circuit has been interrupted. There are also contact device Lungs known for sound reproducers that can be controlled by spatial features such as perforations on the sound carrier itself.
Die Erfindung löst demgegenüber die Aufgabe, das irrtümliche Löschen einer nach dem Magnettonverfahren hergestellten Aufzeichnung auf dem Tonträger zu verhindern, in der Weise, daß der Tonaufzeichnung eine Steuerschwingung überlagert ist, die bei der Wiedergabe einen Steuerkreis des Gerätes beeinflußt, oder daß der Tonträger mit der zu schützenden Aufzeichnung außerhalb seiner mit Tonspuren versehenen Fläche elektrisch leitende Flächenteile aufweist, welche mit Kontaktvorrichtungen zusammenarbeiten, in beiden Fällen mit der Wirkung, den Aufnahme- und/oder Löschkreis des Gerätes zu verriegeln oder zu unterbrechen.In contrast, the invention solves the problem of erroneous deletion a recording made by the magnetic sound process on the sound carrier prevent, in such a way that a control oscillation is superimposed on the sound recording is that influences a control circuit of the device during playback, or that the Sound carrier with the recording to be protected outside of its soundtrack Surface has electrically conductive surface parts, which with contact devices work together, in both cases with the effect of the admission and / or extinguishing circle to lock or interrupt the device.
Während mechanisch wirkende Verriegelungsglieder sehr kleine Fertigungs- und Einstelltoleranzen benötigen, die an Wartung und Instandsetzung erhebliche Anforderungen stellen, kann eine in der Tonspur aufgezeichnete Steuerschwingung in einfacher Weise unter Verwendung von bekannten elektrischen Weichen ausgesiebt werden und ein Relais betätigen oder unmittelbar auf ein Resonanzrelais wirken, welches den Aufnahmekreis unterbricht oder verriegelt. Da die Steuerschwingung zugleich mit der eigentlichen Tonaufzeichnung abgenommen wird, ist kein besonderer Abnahmekopf erforderlich. Ein elektrisches Sieb ist ein leicht austauschbares Bauteil; die Maßtoleranzen des Gerätes, des Tonträgers oder seiner Kassette sind ohne Bedeutung für die erstrebte Wirkung, besondere Anforderungen an die Fertigungsgenauigkeit, Wartung und Instandsetzung müssen nicht gestellt werden. Dasselbe gilt für die Verwendung elektrisch leitender Flächenteile in Verbindung mit der Kontaktvorrichtung eines elektrischen Kreises. Bei einem plattenförmigen Tonträger können die leitenden Flächen z. B. nahe dem Zentrier loch oder in dem Loch selbst vorgesehen sein.While mechanically acting locking elements are very small manufacturing and setting tolerances that place considerable demands on maintenance and repair a control oscillation recorded in the sound track can be set in a simple manner be screened out using known electrical switches and a relay actuate or act directly on a resonance relay, which the recording circuit interrupted or locked. Since the control oscillation is at the same time as the actual No special pick-up head is required. A electric sieve is an easily replaceable component; the dimensional tolerances of the device, the sound carrier or its cassette are irrelevant for the desired effect, special requirements for manufacturing accuracy, maintenance and repair do not have to be asked. The same applies to the use of electrically conductive ones Surface parts in connection with the contact device of an electrical circuit. In the case of a plate-shaped sound carrier, the conductive surfaces can, for. B. near the Centering hole or be provided in the hole itself.
Die Erfindung ist nicht auf bestimmte Arten von Tonträgern beschränkt, und der Fachmann kann sich zu ihrer Verwirklichung beliebiger zweckdienlicher elektrischer Maßnahmen bedienen.The invention is not limited to certain types of sound carriers, and the person skilled in the art can refer to any suitable electrical device for their realization Operate measures.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB13791A DE976753C (en) | 1951-02-17 | 1951-02-17 | Electric locking device for magnetic recorders |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB13791A DE976753C (en) | 1951-02-17 | 1951-02-17 | Electric locking device for magnetic recorders |
Publications (1)
Publication Number | Publication Date |
---|---|
DE976753C true DE976753C (en) | 1964-04-16 |
Family
ID=6957714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB13791A Expired DE976753C (en) | 1951-02-17 | 1951-02-17 | Electric locking device for magnetic recorders |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE976753C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090614A1 (en) * | 1982-03-29 | 1983-10-05 | Fanuc Ltd. | Memory cassette holding apparatus |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE554344C (en) * | 1929-10-15 | 1932-07-07 | Aeg | Contact device for sound reproduction devices tape-shaped sound carriers |
DE582383C (en) * | 1931-02-05 | 1933-08-14 | Echophon Maschinen Akt Ges | Disconnection device for electromagnetic speaking machines with magnetizable, rewindable, wire or tape-shaped phonetic transcription carrier according to the Poulsen method |
DE633160C (en) * | 1931-11-26 | 1936-07-21 | Tobis Tonbild Syndikat Akt Ges | Device for recording or playing back sound recordings |
DE665291C (en) * | 1936-07-26 | 1938-09-21 | Julius Pintsch Kom Ges | Device for automatic triggering of switching processes on film equipment |
DE674007C (en) * | 1934-03-22 | 1939-04-03 | Julius Pintsch Kom Ges | Optical sound recording and playback device with endless tape |
CH222293A (en) * | 1940-12-14 | 1942-07-15 | Licentia Gmbh | Method for inserting additions or changes in dictations recorded by the magnetic sound method and the like. |
US2466514A (en) * | 1944-11-23 | 1949-04-05 | Armour Res Found | Magnetic recording and reproducing device with means to prevent accidental erase of record medium |
US2515190A (en) * | 1944-07-17 | 1950-07-18 | Armour Res Found | Record protector for magnetic recording and reproducing devices |
DE804374C (en) * | 1948-12-11 | 1951-04-23 | Schaub Appbau Ges M B H G | Method and device for marking selected parts of a magnetic sound recording |
-
1951
- 1951-02-17 DE DEB13791A patent/DE976753C/en not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE554344C (en) * | 1929-10-15 | 1932-07-07 | Aeg | Contact device for sound reproduction devices tape-shaped sound carriers |
DE582383C (en) * | 1931-02-05 | 1933-08-14 | Echophon Maschinen Akt Ges | Disconnection device for electromagnetic speaking machines with magnetizable, rewindable, wire or tape-shaped phonetic transcription carrier according to the Poulsen method |
DE633160C (en) * | 1931-11-26 | 1936-07-21 | Tobis Tonbild Syndikat Akt Ges | Device for recording or playing back sound recordings |
DE674007C (en) * | 1934-03-22 | 1939-04-03 | Julius Pintsch Kom Ges | Optical sound recording and playback device with endless tape |
DE665291C (en) * | 1936-07-26 | 1938-09-21 | Julius Pintsch Kom Ges | Device for automatic triggering of switching processes on film equipment |
CH222293A (en) * | 1940-12-14 | 1942-07-15 | Licentia Gmbh | Method for inserting additions or changes in dictations recorded by the magnetic sound method and the like. |
US2515190A (en) * | 1944-07-17 | 1950-07-18 | Armour Res Found | Record protector for magnetic recording and reproducing devices |
US2466514A (en) * | 1944-11-23 | 1949-04-05 | Armour Res Found | Magnetic recording and reproducing device with means to prevent accidental erase of record medium |
DE804374C (en) * | 1948-12-11 | 1951-04-23 | Schaub Appbau Ges M B H G | Method and device for marking selected parts of a magnetic sound recording |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090614A1 (en) * | 1982-03-29 | 1983-10-05 | Fanuc Ltd. | Memory cassette holding apparatus |
US4544971A (en) * | 1982-03-29 | 1985-10-01 | Fanuc Ltd. | Memory cassette holding apparatus |
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