CA1006825A - Sound communication system - Google Patents

Sound communication system

Info

Publication number
CA1006825A
CA1006825A CA212,380A CA212380A CA1006825A CA 1006825 A CA1006825 A CA 1006825A CA 212380 A CA212380 A CA 212380A CA 1006825 A CA1006825 A CA 1006825A
Authority
CA
Canada
Prior art keywords
communication system
sound communication
sound
communication
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
CA212,380A
Other versions
CA212380S (en
Inventor
Gordon S. Carroll
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.)
ITT Inc
Original Assignee
ITT Industries Inc
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 Industries Inc filed Critical ITT Industries Inc
Application granted granted Critical
Publication of CA1006825A publication Critical patent/CA1006825A/en
Expired legal-status Critical Current

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)
CA212,380A 1973-10-29 1974-10-28 Sound communication system Expired CA1006825A (en)

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
CA1006825A true CA1006825A (en) 1977-03-15

Family

ID=23626167

Family Applications (1)

Application Number Title Priority Date Filing Date
CA212,380A Expired CA1006825A (en) 1973-10-29 1974-10-28 Sound communication system

Country Status (6)

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

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 (en) * 1988-10-22 1990-04-25 Sasaki Denki Seisakusho:Kk Siren amplifier

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
IT1025224B (en) 1978-08-10
JPS50155106A (en) 1975-12-15
US3873980A (en) 1975-03-25
FR2248959A1 (en) 1975-05-23
DE2450118A1 (en) 1975-04-30
JPS5419123B2 (en) 1979-07-12

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