GB732199A - Device for controlling a telephonograph - Google Patents

Device for controlling a telephonograph

Info

Publication number
GB732199A
GB732199A GB2174053A GB2174053A GB732199A GB 732199 A GB732199 A GB 732199A GB 2174053 A GB2174053 A GB 2174053A GB 2174053 A GB2174053 A GB 2174053A GB 732199 A GB732199 A GB 732199A
Authority
GB
United Kingdom
Prior art keywords
amplifier
ups
pick
coding device
telephonograph
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
GB2174053A
Inventor
Max Handschin
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.)
PROMUNDO
Original Assignee
PROMUNDO
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 PROMUNDO filed Critical PROMUNDO
Priority to GB2174053A priority Critical patent/GB732199A/en
Publication of GB732199A publication Critical patent/GB732199A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/652—Means for playing back the recorded messages by remote control over a telephone line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

732,199. Substation equipment. PROMUNDO. Aug. 6, 1953, No. 21740/53. Class 40 (4). In a phonographic device for answering calls, the exchange line 1, 2 is connected to the primary winding 3 of a transformer 4 having two secondary windings 5 and 9, of which one, 9, is connected through an amplifier 10 to a coding device which controls the reproduction of recorded messages in accordance with a code of speech impulses, while the other secondary winding 5 is connected through an amplifier 6 to either of the two pick-ups 7 and 8, a phase-reversing device 14 being connected between the two amplifiers 6 and 10 so that signals from the pick-ups 7 and 8 reaching the amplifier 10 by two different paths neutralize themselves and do not reach the coding device.
GB2174053A 1953-08-06 1953-08-06 Device for controlling a telephonograph Expired GB732199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2174053A GB732199A (en) 1953-08-06 1953-08-06 Device for controlling a telephonograph

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2174053A GB732199A (en) 1953-08-06 1953-08-06 Device for controlling a telephonograph

Publications (1)

Publication Number Publication Date
GB732199A true GB732199A (en) 1955-06-22

Family

ID=10168002

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2174053A Expired GB732199A (en) 1953-08-06 1953-08-06 Device for controlling a telephonograph

Country Status (1)

Country Link
GB (1) GB732199A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183948B (en) * 1961-01-12 1964-12-23 Telefunken Patent Memories, especially micro memories for information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183948B (en) * 1961-01-12 1964-12-23 Telefunken Patent Memories, especially micro memories for information

Similar Documents

Publication Publication Date Title
GB732199A (en) Device for controlling a telephonograph
GB879606A (en) Improvements relating to inductive loop communication systems
ES218226A1 (en) Transformers
US2275405A (en) Intercommunication system
GB961755A (en) Level control arrangement for telephone substation sets comprising speech and/or receiving amplifiers
ES207702A1 (en) Sound detector device diminating telephone devices without connection with themselves (Machine-translation by Google Translate, not legally binding)
US2345046A (en) Intercommunicating system
ES255344A1 (en) Improvements in amplifiers appliances for telephones (Machine-translation by Google Translate, not legally binding)
GB697080A (en) Improvements in or relating to loading coils
GB805392A (en) Improvements in or relating to microphone units
CA609908A (en) Tone controlled telephone answering device
GB779156A (en) A remote control device for use with apparatus incorporating a loud speaker
GB459198A (en) Improvements in or relating to operators' sets for telephone systems
GB298249A (en) Improvements in or relating to apparatus for the electrical transmission of sound from gramophone records
GB749694A (en) Hybrid circuits for connecting a four wire transmission line to a two wire transmission line
GB141790A (en) Improved means for recording sound
GB976179A (en) Improvements in and relating to loudspeaking telephone systems and apparatus
GB554114A (en) Coils for relays and inductive apparatus
ES440331A1 (en) Negative impedance repeater with double amplification, for telephone lines
GB583975A (en) Improvements in and relating to loudspeaking intercommunicating telephones
GB666912A (en) Improvements in duplex telephone transmission systems
GB889733A (en) Improvements relating to inductive loop communication systems
ES26158U (en) Device for capturing and reproducing sounds between telephones and radio receivers (Machine-translation by Google Translate, not legally binding)
ES203745A1 (en) A new intercommunicator system (Machine-translation by Google Translate, not legally binding)
GB876305A (en) Improvements in or relating to electrical signalling systems