GB488517A - Improvements in or relating to devices for the audible detection of high frequency currents - Google Patents

Improvements in or relating to devices for the audible detection of high frequency currents

Info

Publication number
GB488517A
GB488517A GB24136/37A GB2413637A GB488517A GB 488517 A GB488517 A GB 488517A GB 24136/37 A GB24136/37 A GB 24136/37A GB 2413637 A GB2413637 A GB 2413637A GB 488517 A GB488517 A GB 488517A
Authority
GB
United Kingdom
Prior art keywords
frequency currents
rectifier
detector
frequency
current
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
GB24136/37A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB488517A publication Critical patent/GB488517A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

488,517. Current meters. SIEMENS &. HALSKE AKT.-GES. Sept. 3, 1937, No. 24136. Convention date, Nov. 23, 1938. [Class 37] [Also in Group XL] In a device for the audible detection and of unmodulated high-frequency currents, a low frequency audible detector 6 and a measuring instrument 5 are connected through a rectifier 4 across the secondary windings 3 of a transformer 2 which is excited by the high-frequency currents through the primary windings 1 and by an audio-frequency current through the second primary windings 10. the arrangement being such that the limiting value of the rectifier is exceeded, causing the detector 6 to respond, only when high-frequency currents are being received. The limiting value of the rectifier may be increased by applying a direct potential. If the apparent impedance of the second primary winding is equal to the resistance of the low frequency source, the response of the detector 6 will be independent of the magnitude of the highfrequency current, but if it is smaller than this resistance the response varies with the magnitude.
GB24136/37A 1936-11-23 1937-09-03 Improvements in or relating to devices for the audible detection of high frequency currents Expired GB488517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE488517X 1936-11-23

Publications (1)

Publication Number Publication Date
GB488517A true GB488517A (en) 1938-07-08

Family

ID=6543814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24136/37A Expired GB488517A (en) 1936-11-23 1937-09-03 Improvements in or relating to devices for the audible detection of high frequency currents

Country Status (2)

Country Link
FR (1) FR825787A (en)
GB (1) GB488517A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135786A (en) * 1983-02-25 1984-09-05 Clifford Yates Alternating current sensing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135786A (en) * 1983-02-25 1984-09-05 Clifford Yates Alternating current sensing device

Also Published As

Publication number Publication date
FR825787A (en) 1938-03-14

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