IT1025224B - Apparecchiatua di comunicazione sonora multiscopo - Google Patents

Apparecchiatua di comunicazione sonora multiscopo

Info

Publication number
IT1025224B
IT1025224B IT28826/74A IT2882674A IT1025224B IT 1025224 B IT1025224 B IT 1025224B IT 28826/74 A IT28826/74 A IT 28826/74A IT 2882674 A IT2882674 A IT 2882674A IT 1025224 B IT1025224 B IT 1025224B
Authority
IT
Italy
Prior art keywords
communication equipment
sound communication
multi purpose
purpose sound
equipment
Prior art date
Application number
IT28826/74A
Other languages
English (en)
Original Assignee
Itt
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 Itt filed Critical Itt
Application granted granted Critical
Publication of IT1025224B publication Critical patent/IT1025224B/it

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
IT28826/74A 1973-10-29 1974-10-28 Apparecchiatua di comunicazione sonora multiscopo IT1025224B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US410776A US3873980A (en) 1973-10-29 1973-10-29 Sound communication system

Publications (1)

Publication Number Publication Date
IT1025224B true IT1025224B (it) 1978-08-10

Family

ID=23626167

Family Applications (1)

Application Number Title Priority Date Filing Date
IT28826/74A IT1025224B (it) 1973-10-29 1974-10-28 Apparecchiatua di comunicazione sonora multiscopo

Country Status (6)

Country Link
US (1) US3873980A (it)
JP (1) JPS5419123B2 (it)
CA (1) CA1006825A (it)
DE (1) DE2450118A1 (it)
FR (1) FR2248959A1 (it)
IT (1) IT1025224B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040050A (en) * 1972-01-07 1977-08-02 Nunn Jr Ewing D Emergency vehicle audible warning system
JPH02113699A (ja) * 1988-10-22 1990-04-25 Sasaki Denki Seisakusho:Kk サイレンアンプ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747092A (en) * 1971-12-07 1973-07-17 Carson Mfg Co Inc Electronic siren circuit

Also Published As

Publication number Publication date
JPS50155106A (it) 1975-12-15
CA1006825A (en) 1977-03-15
US3873980A (en) 1975-03-25
DE2450118A1 (de) 1975-04-30
JPS5419123B2 (it) 1979-07-12
FR2248959A1 (it) 1975-05-23

Similar Documents

Publication Publication Date Title
SE400012B (sv) Hogtalare
SE406422B (sv) Rumsnetverk
IT987335B (it) Disposizione di selezione telefonica
BE797074A (nl) Luidsprekend telefoontoestel
DK138570B (da) Højttaleranordning.
BE796830A (nl) Communicatie-ontvanger
DK150058C (da) Hoejttalersystem
AT332919B (de) Lautsprecher
AT321388B (de) Kopfhörer
BR7406897D0 (pt) Esquema de transmissao telefonica
DK138569B (da) Højttaleranordning.
NL181389C (nl) Signaalvereffenaar.
NO136236C (no) Hemodialyseapparatur.
IT1003592B (it) Microtelefono
IT1017707B (it) Sistema di comunicazione sonora multiscopo
AT325125B (de) Kopfhörer
BR7405447D0 (pt) Alto falante
NL7415585A (nl) Telefoontoestel.
SE389954B (sv) Telefonapparat
IT1025224B (it) Apparecchiatua di comunicazione sonora multiscopo
NL7405042A (nl) Rondstralende luidsprekerbox.
NO741353L (no) Undersjøisk byggverk.
IT992415B (it) Montatura di altoparlante
ATA1022673A (de) Kopfhoerer
IT981141B (it) Amplificatori di segnali di tele comunicazioni