ES279732A1 - A system of internal vocal communications (Machine-translation by Google Translate, not legally binding) - Google Patents

A system of internal vocal communications (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES279732A1
ES279732A1 ES0279732A ES279732A ES279732A1 ES 279732 A1 ES279732 A1 ES 279732A1 ES 0279732 A ES0279732 A ES 0279732A ES 279732 A ES279732 A ES 279732A ES 279732 A1 ES279732 A1 ES 279732A1
Authority
ES
Spain
Prior art keywords
stations
translation
handset
machine
legally binding
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
ES0279732A
Other languages
Spanish (es)
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.)
Gai Tronics Corp
Original Assignee
Gai Tronics 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 Gai Tronics Corp filed Critical Gai Tronics Corp
Priority to ES0279732A priority Critical patent/ES279732A1/en
Publication of ES279732A1 publication Critical patent/ES279732A1/en
Expired legal-status Critical Current

Links

Landscapes

  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

A system of internal vocal communications comprising a plurality of separate stations; including each of the stations a loudspeaker with the associated power amplifier and the supply or power supply to it, a handset equipped with a telephone receiver and a low impedance differential pressure microphone, a microphone preamplifier and an output amplifier low input impedance and low output impedance of the order of 30 ohms and including an output transformer and selector switch; two pairs of twisted pair conductors that interconnect the selector switches of the different stations, one of the pairs being a conversation line and the other a call line, which allow the user, at will, to converse publicly through the loudspeakers and the line or private conversation from handset to handset between stations. (Machine-translation by Google Translate, not legally binding)
ES0279732A 1962-08-02 1962-08-02 A system of internal vocal communications (Machine-translation by Google Translate, not legally binding) Expired ES279732A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES0279732A ES279732A1 (en) 1962-08-02 1962-08-02 A system of internal vocal communications (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES0279732A ES279732A1 (en) 1962-08-02 1962-08-02 A system of internal vocal communications (Machine-translation by Google Translate, not legally binding)

Publications (1)

Publication Number Publication Date
ES279732A1 true ES279732A1 (en) 1963-06-01

Family

ID=34560994

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0279732A Expired ES279732A1 (en) 1962-08-02 1962-08-02 A system of internal vocal communications (Machine-translation by Google Translate, not legally binding)

Country Status (1)

Country Link
ES (1) ES279732A1 (en)

Similar Documents

Publication Publication Date Title
GB1280388A (en) Telephone instrument
ES452425A1 (en) Loudspeaking teleconferencing circuit
ES409421A1 (en) Electronic telephone transmission circuit
GB777184A (en) Improvements in or relating to telephone systems
ES279732A1 (en) A system of internal vocal communications (Machine-translation by Google Translate, not legally binding)
US3126448A (en) Station
US2655557A (en) Apparatus for use in telephone or like communication systems
US2813152A (en) Telephone intercommunication system
US2468911A (en) Communication system
US2761014A (en) Multiple-station selective communication system with single amplifier
US3439121A (en) Multiple channel loud-speaking telephone
US2240509A (en) Balanced telephone circuit
ES261154A1 (en) Conference call circuit
GB795144A (en) Improvements in or relating to loud-speaking telephone apparatus
US2100887A (en) Interior telephone equipment
JPS5329605A (en) Hand-free telephone set
US2502824A (en) Signaling device for sound powered telephone systems
ES439298A1 (en) Improvements introduced in the connections of interfone installations, intercommunication in duplex or installations of loudspeakers commanded by push buttons. (Machine-translation by Google Translate, not legally binding)
GB256431A (en) Improvements in or relating to telephonic apparatuses
JPS556928A (en) Extension answer connecting system for key telephone system
ES368640A1 (en) Interior telephone circuit. (Machine-translation by Google Translate, not legally binding)
GB674735A (en) Improvements in and relating to electrical communication systems
GB1350142A (en) Controllable attenuator
GB666868A (en) Loudspeaking telephone system
GB862262A (en) Improvements connected with loudspeaking intercommunication systems