DE374085C - Key circuit for the purposes of wireless messaging - Google Patents

Key circuit for the purposes of wireless messaging

Info

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
Application number
DEL48679D
Other languages
German (de)
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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.)
Publication date
Priority to DEL48679D priority Critical patent/DE374085C/en
Priority claimed from DEL48573D external-priority patent/DE369880C/en
Application granted granted Critical
Publication of DE374085C publication Critical patent/DE374085C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C1/00Amplitude modulation
    • H03C1/08Amplitude modulation by means of variable impedance element
    • H03C1/10Amplitude modulation by means of variable impedance element the element being a current-dependent inductor
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/02Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/04Modulator 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)

PATENTANSPRÜCHE: r. Tastschaltung für die Zwecke der clrahtlosen Nachrichtenübermittlung nach Patent 36988o, dadurch gekennzeichnet, elaß zwecks Verwendung nur eines Transformators der Generator in einem geschlossenen Kreis angeordnet ist, während der Transformator bei geöffneter Taste den Strahlkreis (Antenne) unterbricht. PATENT CLAIMS: r. Key circuit for the purpose of wireless communication according to patent 36988o, characterized in that for the purpose of using only one transformer, the generator is arranged in a closed circuit, while the transformer interrupts the beam circuit (antenna) when the key is open. 2. Schaltungsanordnung nach Anspruch r, dadurch gekennzeichnet, daß der Transformator, an dessen Stelle auch Drosseln treten können, in die Erdleitung eingeschaltet ist.2. Circuit arrangement according to claim r, characterized in that the transformer, in the place of which chokes can also be used in which the earth line is switched on.
DEL48679D 1919-07-16 Key circuit for the purposes of wireless messaging Expired DE374085C (en)

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)

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