DE365437C - Wireless telegraphy and telephony reception arrangement - Google Patents
Wireless telegraphy and telephony reception arrangementInfo
- Publication number
- DE365437C DE365437C DEG48223D DEG0048223D DE365437C DE 365437 C DE365437 C DE 365437C DE G48223 D DEG48223 D DE G48223D DE G0048223 D DEG0048223 D DE G0048223D DE 365437 C DE365437 C DE 365437C
- Authority
- DE
- Germany
- Prior art keywords
- hand
- tuning
- switching
- wireless telegraphy
- telephony
- 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
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
Description
Empfangsanordnung für drahtlose Telegraphie und Telephonie. Die Erfindung besteht in einer Einrichtung an einem Empfänger für drahtlose Telegraphie und Telephonie für größeren Wellenbereich, durch die der Empfang an einzelnen Punkten oder begrenzten Teilen des ganzen Wellenbereichs ausführbar, an den übrigen Teilen des Bereichs aber unmöglich gemacht wird. Das kann durch ein Organ erreicht werden, mit dein die Abstimmittel seiner Schwingungskreise teilbereichsweise wirksam bzw. unwirksam gemacht werden.Receiving arrangement for wireless telegraphy and telephony. The invention consists in a device on a receiver for wireless telegraphy and telephony for a larger wave range, by means of which reception can be carried out at individual points or limited parts of the entire wave range, but is made impossible at the other parts of the range. This can be achieved by an organ with which the tuning means of its oscillation circles can be made effective or ineffective in some areas.
Ein solcher Empfänger eignet sich besonders für Zeitungsdienst, wo verschiedenartige Nachrichten mit verschiedenen Wellen aufnehrhbar, bestimmte Wellenbereiche aber für unbefugte Aufnahmen gesperrt sein sollen.Such a receiver is particularly suitable for newspaper service where Various messages with different waves can be picked up, certain wave ranges but should be blocked for unauthorized recordings.
Auf der Zeichnung ist schematisch ein Ausführungsbeispiel für eine derartige Anordnun- veranschaulicht.In the drawing, an embodiment of a is schematically such an arrangement is illustrated.
Mit einem Empfängerschwingungskreis ist ein Schaltorgan verbunden, das z. B. aus einer Schaltscheibe i besteht, die auf der Achse des DrehkondensatorS 2 des Schwingungskreises befestigt ist. Die Schaltscheibe arbeitet mit einem Kontakt 3 zusammen derart, daß durch einen Zahnkopf der Scheibe der Kontakt geschlossen, beim Einfallen des Kontakthebels in eine Zahnlücke aber der Kontakt geöffnet wird. Die beiden Kontaktkleinmen sind so an den Schwingungskreis zwischen der Selbstinduktion 4 und dem Drehkondensator 2 gelegt, daß letzterer bei Schließung des Kontaktes kurzgeschlossen wird. Für die Schließungsbereiche entsprechend der Bereiche der Zahnköpfe ist also das Abstimmittel unwirksam und demnach der Einp#fang überhaupt unmöglich gemacht. Durch die Wahl der Verzahnung ist man so in der Lage, den Empfänger für beliebig viele und beliebig gelegene Wellenbereiche nutzbar zu machen bzw. zu sperren.With a receiver oscillating circuit, a switching element is connected, which z. B. consists of a switching disk i, which is attached to the axis of the variable capacitor S 2 of the oscillating circuit. The switching disk works together with a contact 3 in such a way that the contact is closed by a tooth tip of the disk, but the contact is opened when the contact lever falls into a tooth gap. The two small contacts are placed on the oscillating circuit between the self-induction 4 and the variable capacitor 2 that the latter is short-circuited when the contact closes. For the closure areas corresponding to the areas of the tooth tips, the tuning means is ineffective and therefore the capture is made impossible at all. By choosing the toothing, you are able to use or block the receiver for any number of wave ranges in any location.
Mit dem Schaltorgan ist die Vorrichtung zum Feinabstimmen innerhalb der einstellbaren Wellenbereiche unmittelbar verbunden, indem in den Grenzen einer Zahnlücke das Feinabstimmen ohne weiteres möglich ist.With the switching element, the fine-tuning device is within of the adjustable wave ranges directly connected by within the limits of a Tooth gap fine tuning is easily possible.
Das gezeichnete Beispiel deutet nur einen Empfängerkreis schematisch an; dies kann z. B. der sekundäre Empfangskreis sein. Zweckmäßi- werden aber emäß der weiteren t# 9 Erfindung die Abstimmkondensatoren für den Primär- und Sekundärkreis miteinander und mit der Schaltscheibe zwangläufig verbunden, so daß mit derselben Achse die gleichzeitige Ein- und Ausschaltung der verschiedenen Wellen im ganzen Empfänger und die Feinabstimmung möglich ist.The example shown shows only one group of recipients; this can e.g. B. be the secondary receiving circuit. Expediently, however, according to the further t # 9 invention, the tuning capacitors for the primary and secondary circuit are positively connected to one another and to the switching disk, so that the simultaneous switching on and off of the various waves in the entire receiver and fine-tuning is possible with the same axis.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG48223D DE365437C (en) | Wireless telegraphy and telephony reception arrangement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEG48223D DE365437C (en) | Wireless telegraphy and telephony reception arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
DE365437C true DE365437C (en) | 1922-12-15 |
Family
ID=7128593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEG48223D Expired DE365437C (en) | Wireless telegraphy and telephony reception arrangement |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE365437C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750586C (en) * | 1939-09-10 | 1945-01-19 | Arrangement for radio equipment to block the reception of certain transmitters | |
DE971802C (en) * | 1954-08-24 | 1959-04-02 | Telefunken Gmbh | Recipients with automatic voting |
DE972748C (en) * | 1952-01-29 | 1959-09-17 | Gen Motors Corp | Pre-selection device for radio receivers |
-
0
- DE DEG48223D patent/DE365437C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750586C (en) * | 1939-09-10 | 1945-01-19 | Arrangement for radio equipment to block the reception of certain transmitters | |
DE972748C (en) * | 1952-01-29 | 1959-09-17 | Gen Motors Corp | Pre-selection device for radio receivers |
DE971802C (en) * | 1954-08-24 | 1959-04-02 | Telefunken Gmbh | Recipients with automatic voting |
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