GB340048A - New or improved means for controlling the amplification and/or transmission and/or reproduction of sound by electricity - Google Patents

New or improved means for controlling the amplification and/or transmission and/or reproduction of sound by electricity

Info

Publication number
GB340048A
GB340048A GB2949929A GB2949929A GB340048A GB 340048 A GB340048 A GB 340048A GB 2949929 A GB2949929 A GB 2949929A GB 2949929 A GB2949929 A GB 2949929A GB 340048 A GB340048 A GB 340048A
Authority
GB
United Kingdom
Prior art keywords
microphone
dial
amplifier
over
resistance
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
GB2949929A
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.)
LAURENCE HERBERT PEARSON
Original Assignee
LAURENCE HERBERT PEARSON
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 LAURENCE HERBERT PEARSON filed Critical LAURENCE HERBERT PEARSON
Priority to GB2949929A priority Critical patent/GB340048A/en
Publication of GB340048A publication Critical patent/GB340048A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/02—Remote control of amplification, tone or bandwidth

Landscapes

  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

340,048. Pearson, L. H., and Randall, W. J. Sept. 30, 1929. Systems for transmitting music.-In a system comprising one or more microphones for pick-ups and an associated amplifier, variable amounts of resistance are connected to the amplifier to vary its effectiveness by means controlled from a distance by impulses. The same means may be used for connecting up the appropriate microphone, &c. Specification 332,572 [Class 40 (v), Wireless signalling &c.], is referred to. As shown, there is an impulse dial A for each microphone H. When a dial is moved off-normal, its contact c is closed and sluggish relays Rl - - R3 and the back-stroke sbepping- magnet SM are operated. During the return movement, R3 disconnects the input to the amplifier, and when the dial stops the relays fall back. A particular microphone is now connected up over LI, the input transformer is shunted by a. particular resistance over L2 and the pilot lamp of the microphone concerned is lit over L3 to a particular degree of brightness depending on the shunting resistance connected up. To restore the apparatus to normal, a number is dialled to bring L3 to the homing terminals. A similar arrangement but with only one dial is described in the Provisional Specification,
GB2949929A 1929-09-30 1929-09-30 New or improved means for controlling the amplification and/or transmission and/or reproduction of sound by electricity Expired GB340048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2949929A GB340048A (en) 1929-09-30 1929-09-30 New or improved means for controlling the amplification and/or transmission and/or reproduction of sound by electricity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2949929A GB340048A (en) 1929-09-30 1929-09-30 New or improved means for controlling the amplification and/or transmission and/or reproduction of sound by electricity

Publications (1)

Publication Number Publication Date
GB340048A true GB340048A (en) 1930-12-24

Family

ID=10292502

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2949929A Expired GB340048A (en) 1929-09-30 1929-09-30 New or improved means for controlling the amplification and/or transmission and/or reproduction of sound by electricity

Country Status (1)

Country Link
GB (1) GB340048A (en)

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