DE604646C - Device for secret image transmission in which the image cylinders are driven with changing speed - Google Patents
Device for secret image transmission in which the image cylinders are driven with changing speedInfo
- Publication number
- DE604646C DE604646C DEE39651D DEE0039651D DE604646C DE 604646 C DE604646 C DE 604646C DE E39651 D DEE39651 D DE E39651D DE E0039651 D DEE0039651 D DE E0039651D DE 604646 C DE604646 C DE 604646C
- Authority
- DE
- Germany
- Prior art keywords
- image
- transmission
- driven
- changing speed
- secret
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/44—Secrecy systems
- H04N1/448—Rendering the image unintelligible, e.g. scrambling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/44—Secrecy systems
- H04N1/448—Rendering the image unintelligible, e.g. scrambling
- H04N1/4493—Subsequently rendering the image intelligible using a co-operating image, mask or the like
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimiles In General (AREA)
- Facsimile Scanning Arrangements (AREA)
Description
Die Erfindung betrifft eine Einrichtung für geheime Bildübertragung, bei der die BiIdzylinder während der Übertragung mit wechselnder Geschwindigkeit angetrieben werden. So werden die z. B. von einer Funkstation aus übertragenen Bilder oder Schriftstücke bei denjenigen Empfängern zur Unkenntlichkeit 'verzerrt, die nicht in 'entsprechender Weise, d.h. mit dem gleichen Schlüssel arbeiten wie der Sender, selbst wenn sie mit diesem synchron laufen.The invention relates to a device for secret image transmission in which the image cylinder are driven at varying speeds during transmission. So the z. B. from a radio station from transferred images or documents to those recipients unrecognizable 'distorted, which do not' work in a 'corresponding way, i.e. with the same key like the transmitter, even if they are synchronized with it.
Gemäß der Erfindung erfolgt nun die Geschwindigkeitsänderung der Bildzylinder durch eine besonders einfache Anordnung, nämlich durch ein exzentrisches Rad auf der Achse des Bildzylinders, das über ein frei verschiebbares Zwischenrad mit einem dritten Rad in Eingriff steht, welches auf der An-. triebswelle sitzt, die ihrerseits durch leine mittels Handgriffes lösbare Kupplung mit dem Antrieb verbunden ist.According to the invention, the change in speed of the image cylinder now takes place by a particularly simple arrangement, namely by an eccentric wheel on the Axis of the image cylinder, which is connected to a third via a freely movable intermediate wheel Wheel is engaged, which is on the. The drive shaft is seated, in turn, by leash is connected to the drive by means of a detachable coupling.
Ein Beispiel für die Ausführungsform der Erfindung zeigt die Zeichnung in einem Schnitt durch ein Bildübertragungsgerät. Der Antrieb ist durch einen an das Wechselstromnetz angeschlossenen Synchronmotor oder durch ein phonisches Rad/?· gegeben. Dieses arbeitet über das kegelige Kupplungsglied-A, das durch einen mit diesem durch eine Rückführfeder verbundenen, geriffelten Knopf i? ein- und ausgerückt werden kann, auf das Übersetzungsgetriebe, welches sich aus drei Zahnrädern zusammensetzt. Ein Zahnrad P1 sitzt auf der Achse des phonisehen Rades, P2 ist «in frei verschiebbares Zwischenrad ohne feststehende Achse, und P3 sitzt auf der Achse des Bildzylinders C. Das ZahnradP3 ist zur Durchführung der bereits erwähnten Verschlüsselung exzentrisch ausgebildet.An example of the embodiment of the invention is shown in the drawing in a section through an image transmission device. The drive is provided by a synchronous motor connected to the AC mains or by a phonic wheel /? ·. This works via the conical coupling element-A, which is connected by a knurled button i? can be engaged and disengaged on the transmission gear, which is composed of three gears. A gear P 1 is located on the axis of phonisehen wheel, P 2 i st "in a freely displaceable intermediate wheel without fixed axis, and P 3 is seated on the axis of the image cylinder C. The ZahnradP 3 is for performing the above-mentioned encryption formed eccentric.
Die Empfangsgeräte sind dem Sendegerät vollkommen gleich. Motor bzw. phonisches Rad/? und ZahnräderP1,P2 und P3 sind die gleichen wie beim Sender. In der Ruhelage ist die Kupplung Λ gelöst. Der Zeichenstift T, der über die SpindelV und zwei Zahnräder zwangsläufig mit dem Bildzylinder gekuppelt ist, wird auf den auf dem Bildzylinder befindlichen Papierstreifen !eingestellt. Ein von der Sendestelle übertragener Strom- 5" stoß, der den Beginn der Sendung anzeigt, gibt beim Empfänger das Zeichen dazu, daß durch Lösen des Knopfes B die Kupplung .A eingerückt und damit der Bildzylinder C über das Getriebe mit dem phonischen Rad/? gekuppelt und in Bewegung versetzt wird, der nun in genauer Übereinstimmung mit dem Bildzylinder des Senders läuft. Die Übereinstimmung der Geschwindigkeiten tritt aber nicht ein bei unrechtmäßig angeschlossenen, ebenfalls synchronisierten Geräten, die kein Getriebe mit exzentrischen Zahnrädern haben.The receiving devices are exactly the same as the sending device. Motor or phonic wheel /? and gears P 1 , P 2 and P 3 are the same as on the transmitter. In the rest position, clutch Λ is released. The drawing pen T, which is inevitably coupled to the image cylinder via the spindle V and two cogwheels, is adjusted to the paper strip! Located on the image cylinder. A current 5 "impulse transmitted by the transmission point, which indicates the beginning of the transmission, signals to the receiver that, by releasing button B, the clutch .A is engaged and the image cylinder C via the transmission with the phonic wheel /? is coupled and set in motion, which now runs in exact accordance with the image cylinder of the transmitter.
Claims (3)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE39651D DE604646C (en) | Device for secret image transmission in which the image cylinders are driven with changing speed | ||
FR673695D FR673695A (en) | 1928-08-22 | Equipment for radio broadcasting of documents | |
GB2474929A GB317787A (en) | 1929-08-13 | Improvements in or relating to apparatus for broadcasting documents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE39651D DE604646C (en) | Device for secret image transmission in which the image cylinders are driven with changing speed |
Publications (1)
Publication Number | Publication Date |
---|---|
DE604646C true DE604646C (en) | 1934-10-25 |
Family
ID=7078675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE39651D Expired DE604646C (en) | Device for secret image transmission in which the image cylinders are driven with changing speed |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE604646C (en) |
FR (1) | FR673695A (en) |
GB (1) | GB317787A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE948984C (en) * | 1938-07-28 | 1956-09-13 | Lorenz C Ag | Encryption device for telegraph devices |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6392487A (en) * | 1986-10-08 | 1988-04-22 | Adogaa Kogyo Kk | Copying material |
JPS63173683A (en) * | 1987-01-13 | 1988-07-18 | Adogaa Kogyo Kk | Copying material |
-
0
- DE DEE39651D patent/DE604646C/en not_active Expired
-
1928
- 1928-08-22 FR FR673695D patent/FR673695A/en not_active Expired
-
1929
- 1929-08-13 GB GB2474929A patent/GB317787A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE948984C (en) * | 1938-07-28 | 1956-09-13 | Lorenz C Ag | Encryption device for telegraph devices |
Also Published As
Publication number | Publication date |
---|---|
GB317787A (en) | 1930-09-04 |
FR673695A (en) | 1930-01-17 |
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