DE348528C - Device for frequency doubling of alternating currents for signaling purposes - Google Patents
Device for frequency doubling of alternating currents for signaling purposesInfo
- Publication number
- DE348528C DE348528C DENDAT348528D DE348528DD DE348528C DE 348528 C DE348528 C DE 348528C DE NDAT348528 D DENDAT348528 D DE NDAT348528D DE 348528D D DE348528D D DE 348528DD DE 348528 C DE348528 C DE 348528C
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- frequency doubling
- frequency
- alternating currents
- signaling purposes
- 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
- 230000011664 signaling Effects 0.000 title claims 2
- 239000012528 membrane Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Description
Der Gegenstand der Erfindung besteht inThe object of the invention consists in
einer Einrichtung, Wechselströme derjenigen Periode, die eine Membran ausführen kann, verdoppeln zu können. Zu diesem Zweck wird eine für Mikrophon und Telephon gemeinsame Membran benutzt, die unter dem Einfluß des dem Telephon zugeführten Wechselstromes Schwingungen ausführt. Die Magnetspulen des Telephons enthalten an Stelle der permanenten Magnete Kerne aus weichem Eisen, so daß die Membran bei jedem Anwachsen des Stromes unabhängig von der Stromrichtung angezogen wird, also periodische Bewegungen der doppelten Frequenz des zugeführten Wechselstromes ausführt. Die Membran ist dem Telephon und Mikrophon gemeinsam.a device, alternating currents of the period that a membrane can carry out, to be able to double. For this purpose one is common for microphone and telephone Diaphragm used under the influence of the alternating current supplied to the telephone Performs vibrations. The solenoid coils of the phone contain in place of the permanent ones Magnets cores made of soft iron, so that the membrane with each increase of the current independent of the current direction is attracted, so periodic movements of twice the frequency of the supplied alternating current executes. The membrane is common to the telephone and microphone.
Ein Ausführungsbeispiel zeigt die Abbildung. Die Membran δ ist zwischen dem Telephon a und dem Mikrophon c angeordnet. Die Magnetspulen des Telephons enthalten Kerne d aus weichem Eisen, die die Membran mit der doppelten Frequenz des dem Telephon zugeführten Wechselstrome beeinflussen. Auf der anderen Seite der Membran ist ein Filzring e, der in bekannter Weise mit Kohlepulver gefüllt sein kann, angeordnet. Legt man an die die Verbindung mit dem Kohlekontakt bzw. dem Gehäuse herstellenden Anschlüsse f und g einen Stromkreis, so pulsiert in diesem ein Wechselstrom der doppelten Frequenz des zugeführten, so daß man mit dieser Einrichtung eine Frequenzverdopplung herbeiführen kann. Durch Verwendung der vorbeschriebenen Einrichtung in Serienschaltung läßt sich die Frequenz in Abhängigkeit von der Anzahl der verwendeten Apparate steigern, so daß man beispielsweise bei Verwendung von n-Apparaten einen Wechselstrom der 2n-fachen Frequenz des zugeführten Wechselstromes erhält. Es ist z. B. hierdurch möglich, ein akustisch nicht hörbares Signal geringer Frequenz auf der Empfangsstelle hörbar zu machen.The illustration shows an exemplary embodiment. The membrane δ is arranged between the telephone a and the microphone c. The magnetic coils of the telephone contain cores d made of soft iron which affect the membrane at twice the frequency of the alternating current supplied to the telephone. A felt ring e, which can be filled with carbon powder in a known manner, is arranged on the other side of the membrane. If a circuit is applied to the connections f and g which establish the connection with the carbon contact or the housing, an alternating current of twice the frequency of the supplied one pulsates in this circuit, so that a frequency doubling can be brought about with this device. By using the above-described device in series connection, the frequency can be increased as a function of the number of apparatuses used, so that, for example, when using n apparatuses, an alternating current of 2n times the frequency of the alternating current supplied is obtained. It is Z. B. This makes it possible to make an acoustically inaudible signal of low frequency audible at the receiving station.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE348528T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE348528C true DE348528C (en) | 1922-02-10 |
Family
ID=6257446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT348528D Expired DE348528C (en) | Device for frequency doubling of alternating currents for signaling purposes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE348528C (en) |
-
0
- DE DENDAT348528D patent/DE348528C/en not_active Expired
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