GB271465A - Improved circuit arrangement for modulating the oscillations generated by a thermionic device - Google Patents
Improved circuit arrangement for modulating the oscillations generated by a thermionic deviceInfo
- Publication number
- GB271465A GB271465A GB13036/27A GB1303627A GB271465A GB 271465 A GB271465 A GB 271465A GB 13036/27 A GB13036/27 A GB 13036/27A GB 1303627 A GB1303627 A GB 1303627A GB 271465 A GB271465 A GB 271465A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- grid
- modulating
- resistance
- 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
- H03C1/22—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to same grid
Landscapes
- Details Of Audible-Bandwidth Transducers (AREA)
- Hybrid Cells (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
271,465. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. May 22, 1926, [Convention date]. Thermionic modulating and keying systems.- The modulating device M, e.g. the key or microphone, is arranged to vary the impedance of an auxiliarv valve EH which is connected in series with a resistance R forming part of the grid circuit of a valve TH which forms part of the gridleak circuit of the valve O to be controlled. The valve EH is provided with grid and anode batteries B, S and a grid leak LW so that the charge applied when the key is depressed can leak away. Owing to the rectifying properties of the valves EH, TH the battery S may be replaced by an alternating source which for telephony is of a frequency above audibility. The biasing battery VB and the resistance R are so chosen that the desired current flows in the grid circuit of the valve 0 which may be an oscillator or an amplifier fed from an independent drive. The grid leak path of the valve O preferably includes an inductance L and a resistance W in addition to the anode-cathode discharge path of the valve TH.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL271465X | 1926-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB271465A true GB271465A (en) | 1927-09-22 |
Family
ID=19781957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13036/27A Expired GB271465A (en) | 1926-05-22 | 1927-05-14 | Improved circuit arrangement for modulating the oscillations generated by a thermionic device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1784610A (en) |
| BE (1) | BE342399A (en) |
| DE (1) | DE491329C (en) |
| FR (1) | FR633555A (en) |
| GB (1) | GB271465A (en) |
| NL (1) | NL18677C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690495A (en) * | 1945-03-19 | 1954-09-28 | United Shoe Machinery Corp | Seam welding of thermoplastic sheets |
| US2589477A (en) * | 1946-03-28 | 1952-03-18 | Rca Corp | Oscillation generator system |
| US2760069A (en) * | 1952-11-22 | 1956-08-21 | Westinghouse Electric Corp | Electronic keying |
| MX2008008518A (en) * | 2005-12-29 | 2008-11-18 | Volvo Trucks North America | Removably clamped platform. |
-
0
- BE BE342399D patent/BE342399A/xx unknown
- NL NL18677D patent/NL18677C/xx active
-
1927
- 1927-04-26 DE DEN27221D patent/DE491329C/en not_active Expired
- 1927-04-28 FR FR633555D patent/FR633555A/en not_active Expired
- 1927-05-14 GB GB13036/27A patent/GB271465A/en not_active Expired
- 1927-05-21 US US193201A patent/US1784610A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL18677C (en) | |
| BE342399A (en) | |
| FR633555A (en) | 1928-01-31 |
| US1784610A (en) | 1930-12-09 |
| DE491329C (en) | 1930-02-08 |
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