BE475752A - - Google Patents

Info

Publication number
BE475752A
BE475752A BE475752DA BE475752A BE 475752 A BE475752 A BE 475752A BE 475752D A BE475752D A BE 475752DA BE 475752 A BE475752 A BE 475752A
Authority
BE
Belgium
Application number
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.)
Publication of BE475752A publication Critical patent/BE475752A/xx
Priority claimed from US336540A external-priority patent/US2319339A/en
Priority claimed from US482358A external-priority patent/US2356330A/en

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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection
    • 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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
BE475752D 1940-05-22 BE475752A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US336540A US2319339A (en) 1940-05-22 1940-05-22 Signaling system
US651521XA 1942-05-01 1942-05-01
US482358A US2356330A (en) 1943-04-09 1943-04-09 Signaling system

Publications (1)

Publication Number Publication Date
BE475752A true BE475752A (en)

Family

ID=27370736

Family Applications (1)

Application Number Title Priority Date Filing Date
BE475752D BE475752A (en) 1940-05-22

Country Status (2)

Country Link
BE (1) BE475752A (en)
GB (1) GB651521A (en)

Also Published As

Publication number Publication date
GB651521A (en) 1951-04-04

Similar Documents

Publication Publication Date Title
BE440256A (en)
BE437891A (en)
BE438794A (en)
BE467292A (en)
BE440079A (en)
BE432598A (en)
BE436800A (en)
BE437143A (en)
BE437554A (en)
BE437800A (en)
BE437808A (en)
BE437917A (en)
BE438183A (en)
BE438217A (en)
BE438273A (en)
BE438314A (en)
BE438353A (en)
BE438393A (en)
BE438615A (en)
BE438632A (en)
BE439070A (en)
BE439082A (en)
BE439223A (en)
BE439282A (en)
BE439378A (en)