US1910537A - Signal receiving means - Google Patents
Signal receiving means Download PDFInfo
- Publication number
- US1910537A US1910537A US459624A US45962430A US1910537A US 1910537 A US1910537 A US 1910537A US 459624 A US459624 A US 459624A US 45962430 A US45962430 A US 45962430A US 1910537 A US1910537 A US 1910537A
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- US
- United States
- Prior art keywords
- glow
- condenser
- receiving means
- circuit
- signal receiving
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/06—Demodulator circuits; Receiver circuits
Definitions
- This invention broadly relates to a method of signal reception and more specifically to a system adapted to receive such signals when non-modulated waves are used.
- WVhenever non-modulated waves are dealt with in the transmission of signals, it is customary in connection with the reception of such signals to use and have recourse to heterodyning in order to render the wave-trains readable or audible.
- the local heterodyne oscillator 01' wave-generator must be able to generate a highly constant frequency with the result that considerable difficulties are met with in practice which are especially serious whenever short waves are dealt with.
- audio frequency oscillations are employed for rendering signals readable or audible, and these audio frequency oscillations are produced by the ignition (striking) and the rupturing (or breaking) of the discharge in a glow-discharge lamp.
- the plate circuit of audion tube 1 which may be regeneratively coupled if desired as shown by the circuit 2, is connected in series with an anode battery 3 and a resistance 4.
- a glow-discharge lamp 5 in series with a telephone 6.
- a suitably dimensioned condenser 7 It is of advantage to provide a potentiometer device 8 in shunt to the plate battery 3. Thus, by the aid of this potentiometer the potential acting at the glow-discharge lamp may be kept below the rupturing potential.
- the rectified oscillations result in a fall of potential across the resistance 4 and the charging of condenser 7, discharge taking place periodically by way of the glow-discharge lamp 5.
- the audible frequency perceivable in the telephone receiver 6 depends upon the size of the condenser 7 the resistance a, the constants of the glow-discharge lamp and the intensity of the current flowing through resistance 4.
- An arrangement such as described may be used for the recording of incoming signals, as for instance, for purposes of picture telegraphy by having a strip or tape of material reacting to light travel past the glow-discharge lamp 5 in any desired manner.
- a strip or tape of material reacting to light travel past the glow-discharge lamp 5 in any desired manner.
- a space discharge device having input and output circuits, a current source and an impedance in series connected in the output circuit, an impedance shunted across said current source, a glow discharge device and a translating means in series connected between one end of said first named impedance and an intermediate point of said second named impedance and a condenser shunted 7 across said glow discharge device.
- a thermionic repeater device having a signal input circuit connected between the input electrodes thereof, a repeater circuit connected between the output electrodes of said device, a source of direct current and an impedance connected in series in said output circuit, a condenser connected in parallel with said direct current source, a glow discharge device and a translating device connected in series across said impedance and a portion of said direct current source, and a condenser connected in parallel with said glow discharge device.
- An arrangement for translating high frequency message waves comprising an electron discharge device having an input circuit and an output circuit, a grid leak and condenser arranged in said input circuit for allowing direct current to flow through said device in the absence of high frequency voltage and for reducing direct current flow through said device when said input circuit is energized with high frequency energy, a glow discharge tube in said output circuit,
Description
May 23, 1933. B, HAGEN 1,910,537
SIGNAL RECEIVING MEANS Filed June '7, 1930 610 [AMP INVENTOR GERHARU B. HAGEN ATTORNEY Patented May 23, 1933 UNITED STATES PATENT OFFICE GERHARD B. HAGEN, OF BERLIN, GERMANY, ASSIGNOR TO TELEFUNKEN GESELL- SCI-IAFT FUR DRAI-ITLOSE TELEGRAPI-IIE M. B. H., OF .IBERLIN, GERMANY, A CORPO- RATION F GERMANY SIGNAL RECEIVING MEANS Application filed June 7, 1930, Serial No. 459,624, and. in Germany June 8, 1929.
This invention broadly relates to a method of signal reception and more specifically to a system adapted to receive such signals when non-modulated waves are used.
WVhenever non-modulated waves are dealt with in the transmission of signals, it is customary in connection with the reception of such signals to use and have recourse to heterodyning in order to render the wave-trains readable or audible. In such cases it is known that the local heterodyne oscillator 01' wave-generator must be able to generate a highly constant frequency with the result that considerable difficulties are met with in practice which are especially serious whenever short waves are dealt with.
According to the present invention, audio frequency oscillations are employed for rendering signals readable or audible, and these audio frequency oscillations are produced by the ignition (striking) and the rupturing (or breaking) of the discharge in a glow-discharge lamp.
The invention will best be understood from a reading of the following detailed specification in connection with the drawing the single figure of which illustrates diagrammatically a preferred embodiment of my invention.
In said drawing the plate circuit of audion tube 1 which may be regeneratively coupled if desired as shown by the circuit 2, is connected in series with an anode battery 3 and a resistance 4. In parallel with the audion tube there is connected a glow-discharge lamp 5 in series with a telephone 6. In parallel relation to the glow-discharge lamp 5 is a suitably dimensioned condenser 7 It is of advantage to provide a potentiometer device 8 in shunt to the plate battery 3. Thus, by the aid of this potentiometer the potential acting at the glow-discharge lamp may be kept below the rupturing potential.
When electro-magnetic waves are received 4 in the circuit, say, impressed upon the input 9, the rectified oscillations result in a fall of potential across the resistance 4 and the charging of condenser 7, discharge taking place periodically by way of the glow-discharge lamp 5. The audible frequency perceivable in the telephone receiver 6 depends upon the size of the condenser 7 the resistance a, the constants of the glow-discharge lamp and the intensity of the current flowing through resistance 4.
An arrangement such as described may be used for the recording of incoming signals, as for instance, for purposes of picture telegraphy by having a strip or tape of material reacting to light travel past the glow-discharge lamp 5 in any desired manner. Of course, it is possible to have the light aifect light sensitive material through an optical system;
I claim:
1. In a signalling system of the kind described, a space discharge device having input and output circuits, a current source and an impedance in series connected in the output circuit, an impedance shunted across said current source, a glow discharge device and a translating means in series connected between one end of said first named impedance and an intermediate point of said second named impedance and a condenser shunted 7 across said glow discharge device.
2. In a receiving system, a thermionic repeater device having a signal input circuit connected between the input electrodes thereof, a repeater circuit connected between the output electrodes of said device, a source of direct current and an impedance connected in series in said output circuit, a condenser connected in parallel with said direct current source, a glow discharge device and a translating device connected in series across said impedance and a portion of said direct current source, and a condenser connected in parallel with said glow discharge device.
3. An arrangement for translating high frequency message waves comprising an electron discharge device having an input circuit and an output circuit, a grid leak and condenser arranged in said input circuit for allowing direct current to flow through said device in the absence of high frequency voltage and for reducing direct current flow through said device when said input circuit is energized with high frequency energy, a glow discharge tube in said output circuit,
a condenser in parallel with said glow tube, and a resistance also in said output in circuit with said glow tube and condenser whereby reduced current flow through said device due to high frequency currents impressed on said input circuit allows said tube, condenser and resistance to generate low frequency oscillations in said output circuit and Whereby increased current flow through said device due to absence of high frequency currents in said input circuit prevents said tube, condenser and resistance from generating low frequency oscillations.
GERHARD B. HAGEN.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1910537X | 1929-06-08 |
Publications (1)
Publication Number | Publication Date |
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US1910537A true US1910537A (en) | 1933-05-23 |
Family
ID=7748894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US459624A Expired - Lifetime US1910537A (en) | 1929-06-08 | 1930-06-07 | Signal receiving means |
Country Status (1)
Country | Link |
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US (1) | US1910537A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2786138A (en) * | 1953-12-10 | 1957-03-19 | Donald M Wherry | Highly selective keying circuit |
-
1930
- 1930-06-07 US US459624A patent/US1910537A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2786138A (en) * | 1953-12-10 | 1957-03-19 | Donald M Wherry | Highly selective keying circuit |
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