GB170013A - Apparatus for the influencing of electric waves produced by cathodetubes, and more especially for telephony without wires or along wire - Google Patents
Apparatus for the influencing of electric waves produced by cathodetubes, and more especially for telephony without wires or along wireInfo
- Publication number
- GB170013A GB170013A GB26802/21A GB2680221A GB170013A GB 170013 A GB170013 A GB 170013A GB 26802/21 A GB26802/21 A GB 26802/21A GB 2680221 A GB2680221 A GB 2680221A GB 170013 A GB170013 A GB 170013A
- Authority
- GB
- United Kingdom
- Prior art keywords
- battery
- valve
- resistance
- condenser
- circuit
- 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
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
- H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
- H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode
Landscapes
- Transmitters (AREA)
Abstract
170,013. Huth Ges., Dr. E. F., and K³hn, L. Dec. 2, 1919, [Convention date]. Addition to 148,801. Thermionic modulating systems.-The output of a valve oscillator is modulated in accordance with speech or other signals by connecting a resistance in shunt to the valve battery, such resistance being varied by the signal producer. High-frequency current is prevented from passing through the resistance or the battery by providing a condenser in shunt, which condenser does not form part of the oscillatory output circuit of the valve oscillator. The variable resistance may comprise a valve with its grid potential controlled by the signal producer. The latter arrangement is shown in Fig. 2 in which the plate circuit of the oscillating valve is. energized by a battery q, which is also connected across the main electrodes of the modulating valve b, the grid of which is influenced by a microphone. A condenser k separate from the condenser of the oscillatory circuit z is connected across the battery q and forms a short-circuit for the high-frequency current. A choke-coil d is preferably connected in the leads of the battery q, and tends to keep the battery current constant during the fluctuations of the resistance of the tube b.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH76704D DE420290C (en) | 1919-04-04 | 1919-04-04 | Device for controlling tube transmitters |
| DE170013X | 1919-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB170013A true GB170013A (en) | 1922-01-10 |
Family
ID=25754630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26802/21A Expired GB170013A (en) | 1919-04-04 | 1920-07-10 | Apparatus for the influencing of electric waves produced by cathodetubes, and more especially for telephony without wires or along wire |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH95772A (en) |
| FR (1) | FR521393A (en) |
| GB (1) | GB170013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5087537A (en) * | 1989-10-11 | 1992-02-11 | International Business Machines Corporation | Lithography imaging tool and related photolithographic processes |
-
1920
- 1920-07-10 GB GB26802/21A patent/GB170013A/en not_active Expired
- 1920-07-30 FR FR521393A patent/FR521393A/en not_active Expired
- 1920-10-16 CH CH95772D patent/CH95772A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5087537A (en) * | 1989-10-11 | 1992-02-11 | International Business Machines Corporation | Lithography imaging tool and related photolithographic processes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR521393A (en) | 1921-07-11 |
| CH95772A (en) | 1922-08-01 |
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