FR65231E - Voice frequency receivers - Google Patents

Voice frequency receivers

Info

Publication number
FR65231E
FR65231E FR65231DA FR65231E FR 65231 E FR65231 E FR 65231E FR 65231D A FR65231D A FR 65231DA FR 65231 E FR65231 E FR 65231E
Authority
FR
France
Prior art keywords
voice frequency
frequency receivers
receivers
voice
frequency
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
Other languages
French (fr)
Inventor
Ciro Della Giovanna
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR65231E publication Critical patent/FR65231E/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
    • H04Q1/444—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR65231D 1951-04-27 1952-07-04 Voice frequency receivers Expired FR65231E (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL160821 1951-04-27
IT319073X 1951-07-10
NL219653 1957-08-06

Publications (1)

Publication Number Publication Date
FR65231E true FR65231E (en) 1956-02-07

Family

ID=27273552

Family Applications (1)

Application Number Title Priority Date Filing Date
FR65231D Expired FR65231E (en) 1951-04-27 1952-07-04 Voice frequency receivers

Country Status (1)

Country Link
FR (1) FR65231E (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097489B (en) * 1956-09-20 1961-01-19 Siemens Ag Circuit arrangement for the reception of characters transmitted by two preferably audio-frequency characteristic frequencies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1097489B (en) * 1956-09-20 1961-01-19 Siemens Ag Circuit arrangement for the reception of characters transmitted by two preferably audio-frequency characteristic frequencies

Similar Documents

Publication Publication Date Title
CH317527A (en) Electroacoustic converter
FR1034903A (en) Self-blowing switches
FR1066199A (en) Acoustic frequency system
FR1066097A (en) Voice frequency receivers
FR1067372A (en) Loud speaker
FR1034138A (en) Belt improvements
FR65231E (en) Voice frequency receivers
FR64957E (en) Voice frequency receivers
FR75213E (en) Voice frequency receivers
FR1061569A (en) Antenna improvements
CH319073A (en) Voice frequency receiver
FR1054543A (en) Frequency detector
FR1041547A (en) Loudspeaker enhancements
FR64437E (en) Voice frequency receivers
FR1058370A (en) Superheterodyne receiver
FR1082394A (en) Superheterodyne receiver
AT172077B (en) Schnellselche
FR1034353A (en) Vacuum auto-bleach
FR1073375A (en) Superheterodyne receiver
FR1064043A (en) Loud speaker
FR1031018A (en) Loud speaker
AT181747B (en) voice recorder
FR1022028A (en) Voice frequency signaler
FI26584A (en) Sät att framställa äkta färgningar och tryck
AT180604B (en) Television receiver