CH270703A - Additional device for amplifying telephone calls. - Google Patents
Additional device for amplifying telephone calls.Info
- Publication number
- CH270703A CH270703A CH270703DA CH270703A CH 270703 A CH270703 A CH 270703A CH 270703D A CH270703D A CH 270703DA CH 270703 A CH270703 A CH 270703A
- Authority
- CH
- Switzerland
- Prior art keywords
- additional device
- telephone calls
- telephone set
- telephone
- amplifying
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
- H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Description
<B>Zusatzgerät zur</B> Verstärkung <B>von</B> Telephongesprächen. Gegenstand dieser Erfindung ist ein mit einem Telephonapparat induktiv koppelbares Zusatzgerät zur Verstärkung von Telephon- gesprächen.
Die Erfindung soll mehreren Personen ein Mithören eines Telephongespräches sowie eine bequeme Benutzung des Telephonappa- rates ermöglichen, ohne die Notwendigkeit, das Mikrotelephon in der Hand halten zu müssen.
Dies ist dadurch erreicht, dass gemäss der Erfindung in ein gemeinsames, in der Nähe des Telephonapparates aufzustellendes Ge häuse eine Induktionspule, ein mit dieser ver bundener Verstärker und ein an letzterem angeschlossener dynamischer Lautsprecher eingebaut sind, wobei die Induktionsspule dazu bestimmt ist, vom Streufluss eines Or gans des Telephonapparates beeinflusst zu werden.
Die Zeichnung veranschaulicht, teils sche matisch, eine beispielsweise Ausführungsform des Erfindungsgegenstandes.
Fig. 1 zeigt einen Tischtelephonapparat, zu dessen Gesprächsverstärkung das Gerät dient, mit gestrichelt angedeutetem Mikro telephon.
Fig. 2 stellt das Gerätegehäuse mit dem zwecks Gesprächsverstärkung daraufgelegten Mikrotelephon dar.
Fig. 3 ist das Schaltschema dieses Gerätes. Die zum Auflegen des Hörers M des Telephon-Handapparates 6 bestimmte obere Wandungsplatte des Gerätegehäuses 1 be steht aus einem nicht magnetisierbaren Mate rial, z.
B. aus einem Kunstpressstoff. In diesem Gehäuse 1 sind, wie aus dem Schema in Fig. 3 ersichtlich ist, eine Induktionsspule 8, ein von der Gleichrichterröhre 5 für den Heizstrom und den Röhren 2 und 3 gebil detes Verstärkeraggregat für die vom Hörer M des Telephonapparates in der Spule 8 indu zierten Ströme sowie ein an sich bekannter, in der Zeichnung nicht dargestellter dynami scher Lautsprecher eingebaut.
4 ist die Zulei tung für den Anschluss des Verstärkeraggre- gates an ein Wechselstromnetz und 9 der dazu gehörige, durch einen Knopf am Gerätegehäuse betätigbare Schalter. Mit 11 ist der zwischen das Verstärkeraggregat 2, 3, 5 und die zu dem im Gehäuse angeordneten Lautsprecher 12 (Fig. 2) führende Leitung L eingebaute Ausgangstranformator bezeichnet. Der Dreh knopf 10 am Gerätegehäuse dient für die an sich bekannte Tonstärkeregulierung.
An Stelle der Gleichrichterröhre 5 könnte dieses Gerät mit einem Selengleichrichter aus gerüstet sein; es könnte aber auch für Bat teriebetrieb gebaut sein.
<B> Additional device for </B> reinforcement <B> of </B> telephone calls. The subject of this invention is an additional device that can be inductively coupled to a telephone set for amplifying telephone calls.
The invention is intended to enable several people to listen in on a telephone conversation and to use the telephone set conveniently without the need to hold the microphone in their hands.
This is achieved in that, according to the invention, in a common housing to be set up in the vicinity of the telephone set, an induction coil, an amplifier connected to this and a dynamic loudspeaker connected to the latter are built in, the induction coil being intended to remove a leakage flux Organ of the telephone set to be influenced.
The drawing illustrates, partly cal matic, an example embodiment of the subject invention.
Fig. 1 shows a desk phone, the device is used to amplify the conversation, with a broken line micro-phone.
Fig. 2 shows the device housing with the microphone placed on it for the purpose of enhancing the conversation.
Fig. 3 is the circuit diagram of this device. For hanging up the listener M of the telephone handset 6 certain upper wall plate of the device housing 1 be available from a non-magnetizable Mate rial, z.
B. from a plastic. In this housing 1, as can be seen from the diagram in Fig. 3, an induction coil 8, one of the rectifier tube 5 for the heating current and the tubes 2 and 3 gebil detes amplifier unit for the from the listener M of the telephone set in the coil 8 indu adorned currents as well as a known, not shown in the drawing dynami cal loudspeaker installed.
4 is the supply line for connecting the amplifier unit to an alternating current network and 9 is the associated switch which can be operated by a button on the device housing. 11 with the output transformer installed between the amplifier unit 2, 3, 5 and the line L leading to the loudspeaker 12 (FIG. 2) arranged in the housing is designated. The rotary knob 10 on the device housing is used for the known volume control.
Instead of the rectifier tube 5, this device could be equipped with a selenium rectifier; but it could also be built for battery operation.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH278196T | 1949-07-19 | ||
CH270703T | 1949-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH270703A true CH270703A (en) | 1950-09-15 |
Family
ID=25731233
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH270703D CH270703A (en) | 1949-07-19 | 1948-10-02 | Additional device for amplifying telephone calls. |
CH278196D CH278196A (en) | 1949-07-19 | 1949-07-19 | Additional device for amplifying telephone calls. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH278196D CH278196A (en) | 1949-07-19 | 1949-07-19 | Additional device for amplifying telephone calls. |
Country Status (1)
Country | Link |
---|---|
CH (2) | CH270703A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1112126B (en) * | 1960-04-30 | 1961-08-03 | Krone Kg | Additional device for telephones |
-
1948
- 1948-10-02 CH CH270703D patent/CH270703A/en unknown
-
1949
- 1949-07-19 CH CH278196D patent/CH278196A/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH278196A (en) | 1951-09-30 |
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