DE304089C - - Google Patents

Info

Publication number
DE304089C
DE304089C DE1915304089D DE304089DA DE304089C DE 304089 C DE304089 C DE 304089C DE 1915304089 D DE1915304089 D DE 1915304089D DE 304089D A DE304089D A DE 304089DA DE 304089 C DE304089 C DE 304089C
Authority
DE
Germany
Prior art keywords
telephone
thermal
detector
telephony
telegraphy
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 - Lifetime
Application number
DE1915304089D
Other languages
German (de)
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.)
Filing date
Publication of DE304089C publication Critical patent/DE304089C/de
Application filed filed Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06Receivers
    • H04B1/16Circuits
    • H04B1/22Circuits for receivers in which no local oscillation is generated

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Die Erfindung betrifft ein Verfahren der drahtlosen Übertragung elektrischer Wellen zum Zweck der Telegraphie oder Telephonie und beruht auf der Beobachtung, daß bei Benutzung eines thermischen Telephons beliebiger Bauart als Empfänger der bisher zwischen dem Luftleiter der Empfängerstelle und dem Telephon eingeschaltete Detektor in Wegfall kommen kann.The invention relates to a method of wireless transmission of electrical waves for the purpose of telegraphy or telephony and is based on the observation that at Use of a thermal telephone of any type as a receiver of the previously between the air conductor of the receiving station and the telephone switched on detector in omission can come.

ίο Versuche haben ergeben, daß das als Empfänger dienende thermische Telephon gleichzeitig die Aufgabe des Detektors erfüllen kann. Dieser Vorgang ist offenbar darauf zurückzuführen, daß ein thermisches Telephon voll-ίο Experiments have shown that the recipient serving thermal telephone can simultaneously fulfill the task of the detector. This process is evidently due to the fact that a thermal telephone is fully

!5 kommen induktionsfrei arbeitet. Es hat sich ferner herausgestellt, daß auch der sonst im Nebenschluß zu dem Telephon angeordnete Kondensator und die in dem Nebenschlußkreise befindliche Batterie bei Benutzung eines thermischen Telephons als Empfänger in Wegfall kommen können. Hierdurch wird nicht nur eine wesentliche Vereinfachung der zur drahtlosen Übertragung elektrischer Wellen dienenden Einrichtung bedingt, sondern gleichzeitig auch die Bedienung der Einrichtung erleichtert und eine Reihe von Fehlerquellen ausgeschlossen, die bei den bisher üblichen, mit Detektor und Kondensator arbeitenden Einrichtungen auftreten.! 5 works without induction. It has furthermore it was pointed out that also the one otherwise arranged in shunt to the telephone Capacitor and the battery in the shunt circuit when using a thermal Telephones can be omitted as receivers. This not only significantly simplifies the wireless one Transmission of electrical waves serving device conditionally, but simultaneously also facilitates the operation of the device and eliminates a number of sources of error, those in the previously common devices that work with detector and capacitor appear.

Auf der Zeichnung ist als Ausführungsbeispiel eine Empfängerstelle nach der vorliegenden Erfindung schematisch dargestellt.In the drawing, a receiver location according to the present invention is shown as an exemplary embodiment Invention shown schematically.

An den Luftleiter α der Empfängerstelle ist das thermische Telephon b angeschlossen, das zweckmäßig unter Einschaltung einer Induk- 3^ tionsspule c von regelbarer Wirkung geerdet ist. Α to the air director of the receiver location is attached, the thermal telephone b, which is expedient grounded with inclusion of an induction coil 3 ^ c tion of controllable effect.

Es hat sich gezeigt, daß die Güte der Lautwiedergabe des thermischen Telephons innerhalb gewisser Grenzen mit der Steigerung des inneren Widerstandes des Telephons wächst.It has been shown that the quality of the sound reproduction of the thermal telephone within certain limits with the increase in internal resistance of the telephone grows.

Aus vorstehendem ergibt sich, daß die zur Ausführung des beschriebenen Verfahrens dienende Einrichtung sehr einfach ist und nur einen äußerst geringen Raum in Anspruch nimmt. Dieser Umstand sowie die Einfachheit der Bedienung der zur Wellenübertragung dienenden -Einrichtung ist besonders für die drahtlose Telegraphie oder Telephonie im Felde und zur See von großer Bedeutung.From the above it follows that the used to carry out the method described Setup is very simple and takes up very little space. This fact as well as the simplicity the operation of the device used for wave transmission is particularly important for the wireless telegraphy or telephony in the field and at sea is of great importance.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren der drahtlosen Übertragung elektrischer Wellen zum Zweck der Telegraphie oder Telephonie unter Wegfall des Detektors, gekennzeichnet durch die Verwendung eines mit dem Lüftleiter der Empfängerstelle verbundenen thermischen Telephons, das gleichzeitig als Detektor und Empfänger dient.Method of wireless transmission of electrical waves for the purpose of telegraphy or telephony with the elimination of the detector, characterized by the use a thermal telephone connected to the air duct of the receiving station, which also functions as a detector and receiver serves. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DE1915304089D 1915-02-05 1915-02-05 Expired - Lifetime DE304089C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE304089T 1915-02-05

Publications (1)

Publication Number Publication Date
DE304089C true DE304089C (en)

Family

ID=32668454

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1915304089D Expired - Lifetime DE304089C (en) 1915-02-05 1915-02-05

Country Status (3)

Country Link
DE (1) DE304089C (en)
FR (1) FR480854A (en)
GB (1) GB191503954A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1531253A (en) * 1976-02-02 1978-11-08 Kyriacou N Vehicle with suspension system

Also Published As

Publication number Publication date
GB191503954A (en) 1916-03-09
FR480854A (en) 1916-10-04

Similar Documents

Publication Publication Date Title
DE2645087C2 (en) PBX
DE1803539B2 (en) 30.0 ^ .6S "37420 8/8/68" 56894 TV Telephony Facility
DE304089C (en)
DE1141343B (en) Circuit arrangement for telephone subscriber stations with a touch dialing device
DE3129506C2 (en)
US1369805A (en) Secret-communication system
DE1100088B (en) Arrangement for remote control of dictation machines via telephone lines
DE348267C (en) Device for the interference-free recording of sound waves and other pressure waves, in particular underwater sound waves
DE355543C (en) Telephone device for use on aircraft, with two telephone stations
DE761462C (en) Arrangement for the transmission of calls and dialing signals in multiple carrier frequency systems
US1532172A (en) Means for receiving weak signal currents
DE1902091C3 (en) Arrangement for keying out of band signals into the transmission path of a carrier-frequency telephone transmission device
DE499736C (en) Device for high-frequency telephony with two-way communication, in which the modulators of the two communication stations are supplied with the same carrier frequency generated by only one vibration generator
US1340942A (en) Signaling system
DE569033C (en) Telecommunication circuit for telegraphy and telephony, in which a lower frequency range is used for telephonic and the higher frequency range for telegraphic transmission
DE471143C (en) Intercom for wireless telephony
DE195700C (en)
DE612630C (en) Circuit arrangement for telephone systems with several branches on a common line, which can be called optionally
DE416155C (en) Circuit arrangement for sending and receiving, in particular low-frequency electrical vibrations
US1512293A (en) System of telephony and telegraphy
DE542788C (en) Transmitter for submarine cable telegraphy with a transmission capacitor between the beginning of the cable and the transmission contact and an impedance between the beginning of the cable and earth for pre-distortion of the transmission current curve
DE240517C (en)
AT224701B (en) Method and arrangement with which the words spoken in front of a telephone set can be made incomprehensible to a third party attending the conversation
DE477114C (en) Process for increasing the efficiency in circuits that are free of feedback between the receiving and transmitting circuits
DE353920C (en) Circuit arrangement for the unification of the transmission and reception circuit in wireless telephone connections, in multiple telephony with high-frequency alternating currents along lines, etc.