GB278835A - Electrical controlling means - Google Patents

Electrical controlling means

Info

Publication number
GB278835A
GB278835A GB1941626A GB1941626A GB278835A GB 278835 A GB278835 A GB 278835A GB 1941626 A GB1941626 A GB 1941626A GB 1941626 A GB1941626 A GB 1941626A GB 278835 A GB278835 A GB 278835A
Authority
GB
United Kingdom
Prior art keywords
control
impedance
impedances
tappings
values
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
GB1941626A
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.)
HAROLD LISTER KIRKE
Original Assignee
HAROLD LISTER KIRKE
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 HAROLD LISTER KIRKE filed Critical HAROLD LISTER KIRKE
Priority to GB1941626A priority Critical patent/GB278835A/en
Publication of GB278835A publication Critical patent/GB278835A/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

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

278,835. Kirke, H. L. Aug. 5, 1926. Attenuation equalizers and similar impedance networks. -An arrangement for controlling the output of, for example, a loud speaker Z, Fig. 1, in such a way that the amount of control is independent of the varying impedance of the apparatus Z and all frequencies are ccntrolled to the same extent, comprises variable series and shunt impedances R1, R2 of values R0 (I-r/r), R0/I-r respectively, where R0 is the impedance of the source and r is the amount of control i.e, the ratio of the voltage across terminals 3, 4 with the control present to that without any control. Impedances R1, R2 must be of the same kind (resistive, inductive or capacitative) as the impedance R0. Fig. 4 shows a construction in which the impedances R1, R2 are combined in a single unit, each provided with a number of tappings so as to give a series of values of r. The tappings are so chosen that for corresponding points R1 = (I-/r)<2> R2 and the two contact arms 5, 6 are operated simultaneously bv a single knob. Specification 260,537 is referred to.
GB1941626A 1926-08-05 1926-08-05 Electrical controlling means Expired GB278835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1941626A GB278835A (en) 1926-08-05 1926-08-05 Electrical controlling means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1941626A GB278835A (en) 1926-08-05 1926-08-05 Electrical controlling means

Publications (1)

Publication Number Publication Date
GB278835A true GB278835A (en) 1927-10-20

Family

ID=10128981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1941626A Expired GB278835A (en) 1926-08-05 1926-08-05 Electrical controlling means

Country Status (1)

Country Link
GB (1) GB278835A (en)

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