GB390486A - Improvements in or relating to devices for regulating the volume of sound - Google Patents

Improvements in or relating to devices for regulating the volume of sound

Info

Publication number
GB390486A
GB390486A GB19018/31A GB1901831A GB390486A GB 390486 A GB390486 A GB 390486A GB 19018/31 A GB19018/31 A GB 19018/31A GB 1901831 A GB1901831 A GB 1901831A GB 390486 A GB390486 A GB 390486A
Authority
GB
United Kingdom
Prior art keywords
resistance
terminals
output
tapping
terminal
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
GB19018/31A
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.)
Societe Francaise Radio Electrique
Original Assignee
Societe Francaise Radio Electrique
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 Societe Francaise Radio Electrique filed Critical Societe Francaise Radio Electrique
Publication of GB390486A publication Critical patent/GB390486A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/24—Frequency- independent attenuators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Adjustable Resistors (AREA)
  • Amplifiers (AREA)

Abstract

390,486. Sets of resistances. SOC. FRANCAISE RADIO-ELECTRIQUE, 79, Boulevard Haussmann, Paris. July 1, 1931, No. 19018. Convention date, July 3, 1930. Void [Published under Sect. 91 of the Acts]. [Class 37.] A potentiometric resistance, particularly for use as a volume control for the output of audiofrequency amplifiers, is so arranged that the resistance between the output terminals is the same for all positions of the potentiometer tapping. As shown, the potentiometric resistance is connected between input terminals A, B and is divided into equal steps each of resistance r. Tappings are taken to output terminals D1 .. Dn, a resistance being included between each terminal D1 .. Dn and the corresponding tapping point X1 . . Xn of such a value that the resistance between the output terminals CD1, CD2, &c. is constant. If a high resistance can be connected in series with the audiofrequency source between the terminals A, B, the values of the resistances connected to the tapping points may be r, 2r, 3r, &c., i.e. the resistance between the output terminal D1 .. Dn and the corresponding tapping point X1 .. Xn is equal to that between the tapping point and the input terminal A. The resistance of the output circuit may differ from that between the terminals A, B. The resistance between the terminals A, B may be provided with a sliding contact to vary the tapping point, the resistance between this point and the output terminal being simultaneously varied.
GB19018/31A 1931-06-22 1931-07-01 Improvements in or relating to devices for regulating the volume of sound Expired GB390486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR41242T 1931-06-22

Publications (1)

Publication Number Publication Date
GB390486A true GB390486A (en) 1933-04-06

Family

ID=8677423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19018/31A Expired GB390486A (en) 1931-06-22 1931-07-01 Improvements in or relating to devices for regulating the volume of sound

Country Status (4)

Country Link
US (1) US1912719A (en)
BE (2) BE388757A (en)
FR (2) FR714252A (en)
GB (1) GB390486A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125677A (en) * 1953-07-20 1964-03-17 Certificate of correction
US3453529A (en) * 1967-02-17 1969-07-01 Weston Instruments Inc Attenuators having constant output resistance
US3478259A (en) * 1967-07-06 1969-11-11 Frank R Bradley Voltage divider with constant source impedance stages
US4021614A (en) * 1974-12-30 1977-05-03 Teledyne, Inc. Woofer equalizer
JPH01305612A (en) * 1988-06-02 1989-12-08 Toshiba Corp Attenuator

Also Published As

Publication number Publication date
BE380796A (en)
FR714252A (en) 1931-11-10
US1912719A (en) 1933-06-06
FR41242E (en) 1932-12-02
BE388757A (en)

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