DE374085C - Key circuit for the purposes of wireless messaging - Google Patents
Key circuit for the purposes of wireless messagingInfo
- Publication number
- DE374085C DE374085C DEL48679D DEL0048679D DE374085C DE 374085 C DE374085 C DE 374085C DE L48679 D DEL48679 D DE L48679D DE L0048679 D DEL0048679 D DE L0048679D DE 374085 C DE374085 C DE 374085C
- Authority
- DE
- Germany
- Prior art keywords
- transformer
- circuit
- purposes
- key
- key circuit
- 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
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/08—Amplitude modulation by means of variable impedance element
- H03C1/10—Amplitude modulation by means of variable impedance element the element being a current-dependent inductor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Description
Tastschaltung für die Zwecke der drahtlosen Nachrichtenübermittlung. In dem Hauptpatent 369880 ist eine Tastschaltung für die Zwecke der drahtlosen Nachrichtenübermittlung beschrieben, in welcher die Taste abwechselnd die Drosselwirkung zweier Transformatoren aufhebt.Tactile circuit for wireless messaging purposes. In the main patent 369880 a key circuit for the purpose of wireless communication is described in which the key alternately removes the choke effect of two transformers.
Gegenstand vorliegender Erfindung ist eine Tastschaltung, bei welcher gleichfalls clie Drosselwirkung eines Transformators ausgenutzt wird, jedoch nur ein Transformator Anwendung findet, der je nach der Stellung der Taste den Strahlkreis schließt oder öffnet, indem der Transformator beispielsweise in die Erdleitung eingeschaltet ist und bei ge-@ffneter Taste die Erdleitung abschaltet. Hierbei muß die Schaltungsanordnung derart getroffen werden, daß bei geöffneter Taste der Generator in einem geschlossenen Kreis liegt, so daß die Energielieferung nicht unterbrochen wird.The present invention is a key circuit in which likewise the choke effect of a transformer is used, but only a transformer is used which, depending on the position of the button, creates the beam circle closes or opens by switching the transformer into the earth line, for example and switches off the earth line when the button is open. The circuit arrangement must be taken in such a way that when the key is open, the generator is closed Circle so that the energy supply is not interrupted.
Bisher erfolgte die Zeichengebung dadurch, daß bei offener Taste die Hochfrequenzschwingungen über eine Kapazität geleitet wurden.So far, the signing has been done by the fact that when the key is open High frequency vibrations were conducted over a capacitance.
Sowohl dieses Verfahren wie ähnliche bekannte haben den Nachteil, daß die Speisestromquelle wie der Generator dauernd gleich belastet werden. Beim Senden mit großer Telegraphiergeschwindigkeit kann man nun gemäß vorliegender Erfindung den zweiten Transformator dadurch vermeiden, daß man lediglich einen Transformator in den Strahlkreis (Antenne) einschaltet. Die Taste ist hierbei im Transformator angeordnet, so daß dessen Drosselwirkung zur Geltung kommt.Both this method and similar known ones have the disadvantage that the supply current source and the generator are constantly loaded equally. At the Sending at high telegraphing speed can now be done according to the present invention Avoid the second transformer by having only one transformer switches on in the beam circle (antenna). The key is in the transformer arranged so that its throttling effect comes into play.
Infolgedessen wird während des Aussendens der Zeichen die Betriebsquelle un<1 der Generator voll belastet, während in den Zeichenpausen nur ein geringer Strom verbraucht wird. Dies wird dadurch ermöglicht, daß bei geöffneter Taste und demnach bei Abschaltung der Erdleitung der Generator in einem geschlossenen Kreis liegt.As a result, it becomes the operational source while the characters are being sent out un <1 the generator is fully loaded, while only a small amount during the pauses between drawing Electricity is consumed. This is made possible by the fact that when the and keys are open accordingly, when the earth line is switched off, the generator is in a closed circuit lies.
Ein Ausführungsbeispiel der Schaltung zeigt die Abbildung, in welcher der Generator g, der beispielsweise ein Lichtbogengenerätor oder eine Maschine sein kann, in einen aus Kapazität cl und c" und Selbstinduktion s bestehenden, geschlossenen Kreis eingeschaltet ist, in dessen Erdleitung sich der Transformator t mit der Taste a befindet. Der Generator kann durch eine Kapazität oder durch mehrere hintereinandergeschaltete Kapazitäten c3 kurzgeschlossen sein. An die Stelle des Transformators t können beispielsweise auch nvei Drosseln treten, von denen die eine mit Eisenkernen versehen ist und durch die Taste abwechselnd kurzgeschlossen und :eingeschaltet wird. Auch kann die Anordnung derart erfolgen, daß Transformator oder Drosseln nicht direkt in die Erdleitung, sondern in den Antennenzweig eingeschaltet sind.An embodiment of the circuit is shown in the figure in which the generator g, which can for example be an arc generator or a machine, is switched on in a closed circuit consisting of capacitance cl and c ″ and self-induction s, in whose earth line the transformer t is connected The generator can be short-circuited by a capacitance or by several capacitors c3 connected in series. Instead of the transformer t, for example, nvei chokes can be used, one of which is provided with iron cores and alternately short-circuited and switched on by the button The arrangement can also be made in such a way that the transformer or chokes are not connected directly to the earth line, but rather to the antenna branch.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL48679D DE374085C (en) | 1919-07-16 | Key circuit for the purposes of wireless messaging |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL48679D DE374085C (en) | 1919-07-16 | Key circuit for the purposes of wireless messaging | |
DEL48573D DE369880C (en) | 1919-07-16 | 1919-07-16 | Key circuit for the purposes of wireless messaging |
Publications (1)
Publication Number | Publication Date |
---|---|
DE374085C true DE374085C (en) | 1923-04-19 |
Family
ID=25985854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL48679D Expired DE374085C (en) | 1919-07-16 | Key circuit for the purposes of wireless messaging |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE374085C (en) |
-
0
- DE DEL48679D patent/DE374085C/en not_active Expired
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