GB592917A - Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like - Google Patents
Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the likeInfo
- Publication number
- GB592917A GB592917A GB14559/45A GB1455945A GB592917A GB 592917 A GB592917 A GB 592917A GB 14559/45 A GB14559/45 A GB 14559/45A GB 1455945 A GB1455945 A GB 1455945A GB 592917 A GB592917 A GB 592917A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- amplifiers
- amplifier
- studio
- transformer
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
- H04H60/04—Studio equipment; Interconnection of studios
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
- H03G1/0041—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using thermistors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Control Of Amplification And Gain Control (AREA)
Abstract
592,917. Transmission systems. STANDARD TELEPHONES & CABLES, Ltd., and HARDISTY, R. W. June 8, 1945, No. 14559. [Class 40 (iv)] A volume control arrangement for broadcasting and similar systems comprises a source of sound signals located in a studio, a transmission line connecting the source to an amplifier located at a distant point and control means in the studio for controlling the resistance of a thermistor which forms part of the amplifier and controls the gain thereof. The arrangement may be used for mixing and then comprises a number of microphones 2 and 3 connected to amplifiers 16 and 17 and control stations 22 and 23 in the studio with lines 26 and 27 to control thermistors in the amplifiers. An additional source of sound 18 such as a recording device may be connected to an amplifier 19 and controlled from a station 24. The outputs of all these amplifiers may be combined in an amplifier 21 controlled from station 25. The amplifiers may comprise a valve 30 whose cathode is connected to earth through a bias resistance 31. The transmission line is connected to terminals 32 and 33 and the signals then pass through a transformer 34 and a thermistor arrangement to the grid of the valve. One thermistor has its resistance element 37 connected between the transformer and the grid while the other has its resistance 38 serving as the grid resistance. The output of the valve passes through transformer 39. Specifications 541,922, [Group XXXVI], and 558,757 are referred to.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14559/45A GB592917A (en) | 1945-06-08 | 1945-06-08 | Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like |
FR933015D FR933015A (en) | 1945-06-08 | 1946-08-28 | Improvements to program control systems |
ES175006A ES175006A1 (en) | 1945-06-08 | 1946-09-18 | IMPROVEMENTS IN OR RELATING TO VOLUME CONTROL DEVICES IN BROADCASTING AND SIMILAR SYSTEMS |
BE471104D BE471104A (en) | 1945-06-08 | 1947-02-11 | |
CH277490D CH277490A (en) | 1945-06-08 | 1947-09-30 | Installation comprising an amplifier and volume control means. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14559/45A GB592917A (en) | 1945-06-08 | 1945-06-08 | Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB592917A true GB592917A (en) | 1947-10-02 |
Family
ID=10043413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14559/45A Expired GB592917A (en) | 1945-06-08 | 1945-06-08 | Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE471104A (en) |
CH (1) | CH277490A (en) |
ES (1) | ES175006A1 (en) |
FR (1) | FR933015A (en) |
GB (1) | GB592917A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2342798A (en) * | 1998-10-16 | 2000-04-19 | Mitel Corp | Telephone headset click-free muting circuit |
GB2344711A (en) * | 1998-12-11 | 2000-06-14 | Mitel Corp | Telephone headset click-free muting circuit |
US6751316B1 (en) | 1998-12-11 | 2004-06-15 | Mitel Corporation | Click-free muting circuit for headset |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE511541A (en) * | 1951-05-21 |
-
1945
- 1945-06-08 GB GB14559/45A patent/GB592917A/en not_active Expired
-
1946
- 1946-08-28 FR FR933015D patent/FR933015A/en not_active Expired
- 1946-09-18 ES ES175006A patent/ES175006A1/en not_active Expired
-
1947
- 1947-02-11 BE BE471104D patent/BE471104A/xx unknown
- 1947-09-30 CH CH277490D patent/CH277490A/en unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2342798A (en) * | 1998-10-16 | 2000-04-19 | Mitel Corp | Telephone headset click-free muting circuit |
US6292560B1 (en) | 1998-10-16 | 2001-09-18 | Mitel Corporation | Click-free muting circuit for headset |
GB2342798B (en) * | 1998-10-16 | 2003-04-16 | Mitel Corp | Telephone headset click-free muting circuit |
GB2344711A (en) * | 1998-12-11 | 2000-06-14 | Mitel Corp | Telephone headset click-free muting circuit |
GB2344711B (en) * | 1998-12-11 | 2004-02-25 | Mitel Corp | Click-free muting circuit for headset |
US6751316B1 (en) | 1998-12-11 | 2004-06-15 | Mitel Corporation | Click-free muting circuit for headset |
Also Published As
Publication number | Publication date |
---|---|
ES175006A1 (en) | 1946-11-01 |
FR933015A (en) | 1948-04-08 |
BE471104A (en) | 1947-08-11 |
CH277490A (en) | 1951-08-31 |
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