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 like

Info

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
Application number
GB14559/45A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RUPERT WOODVILLE HARDISTY
STC PLC
Original Assignee
RUPERT WOODVILLE HARDISTY
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by RUPERT WOODVILLE HARDISTY, Standard Telephone and Cables PLC filed Critical RUPERT WOODVILLE HARDISTY
Priority to GB14559/45A priority Critical patent/GB592917A/en
Priority to FR933015D priority patent/FR933015A/en
Priority to ES175006A priority patent/ES175006A1/en
Priority to BE471104D priority patent/BE471104A/xx
Priority to CH277490D priority patent/CH277490A/en
Publication of GB592917A publication Critical patent/GB592917A/en
Expired legal-status Critical Current

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

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.
GB14559/45A 1945-06-08 1945-06-08 Improvements in or relating to volume control and mixing arrangements in broadcasting systems and the like Expired GB592917A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE511541A (en) * 1951-05-21

Cited By (6)

* Cited by examiner, † Cited by third party
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
CH277490A (en) 1951-08-31
FR933015A (en) 1948-04-08
BE471104A (en) 1947-08-11

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