GB525019A - Improvements relating to the transmission of alternating currents and more particularly to the modulation of carrier currents in accordance with ringing currents - Google Patents

Improvements relating to the transmission of alternating currents and more particularly to the modulation of carrier currents in accordance with ringing currents

Info

Publication number
GB525019A
GB525019A GB4553/39A GB455339A GB525019A GB 525019 A GB525019 A GB 525019A GB 4553/39 A GB4553/39 A GB 4553/39A GB 455339 A GB455339 A GB 455339A GB 525019 A GB525019 A GB 525019A
Authority
GB
United Kingdom
Prior art keywords
currents
carrier
accordance
modulation
transmission
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
GB4553/39A
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz 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 Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Publication of GB525019A publication Critical patent/GB525019A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplitude Modulation (AREA)

Abstract

525,019. Electromagnetic relays. LORENZ AKT.-GES., C. Feb. 11, 1939, No..4553. Convention date, Feb. 12, 1938. [Class 38 (v)] [Also in Group XL] Alternating current, especially for modulating a carrier current in accordance with ringing signals, is transmitted by means of a relay. The alternating current source T is connected to the relay coil E through a rectifier G so that the contacts e only interrupt the carrier source F once per cycle, and an impedance A which may consist of a resistance, condenser, or resistancecondenser combination is connected in parallel with the rectifier to ensure that the relay releases every cycle of the source T.
GB4553/39A 1938-02-12 1939-02-11 Improvements relating to the transmission of alternating currents and more particularly to the modulation of carrier currents in accordance with ringing currents Expired GB525019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE525019X 1938-02-12

Publications (1)

Publication Number Publication Date
GB525019A true GB525019A (en) 1940-08-20

Family

ID=6552459

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4553/39A Expired GB525019A (en) 1938-02-12 1939-02-11 Improvements relating to the transmission of alternating currents and more particularly to the modulation of carrier currents in accordance with ringing currents

Country Status (1)

Country Link
GB (1) GB525019A (en)

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