JPS56100536A - Alarm system - Google Patents

Alarm system

Info

Publication number
JPS56100536A
JPS56100536A JP278180A JP278180A JPS56100536A JP S56100536 A JPS56100536 A JP S56100536A JP 278180 A JP278180 A JP 278180A JP 278180 A JP278180 A JP 278180A JP S56100536 A JPS56100536 A JP S56100536A
Authority
JP
Japan
Prior art keywords
audio frequency
level
becomes large
signal
frequency signal
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.)
Granted
Application number
JP278180A
Other languages
Japanese (ja)
Other versions
JPS6027080B2 (en
Inventor
Kinya Osumi
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.)
ORION KOGU SEISAKUSHO KK
ORION KOUGU SEISAKUSHO KK
Original Assignee
ORION KOGU SEISAKUSHO KK
ORION KOUGU SEISAKUSHO KK
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 ORION KOGU SEISAKUSHO KK, ORION KOUGU SEISAKUSHO KK filed Critical ORION KOGU SEISAKUSHO KK
Priority to JP278180A priority Critical patent/JPS6027080B2/en
Publication of JPS56100536A publication Critical patent/JPS56100536A/en
Publication of JPS6027080B2 publication Critical patent/JPS6027080B2/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)
  • Alarm Systems (AREA)
  • Traffic Control Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To simplify the constitution to improve economic characteristic of the total system, by constituting the receiver by the audio frequency generating device which generates an audio frequency signal and the amplifying device which amplifies the audio frequency signal level in proportion to the detection level. CONSTITUTION:The receiving signal given to terminal R is detected by detecting device D. The detection output of device D becomes the control input of amplifying device A. Device A amplifies the level of the audio frequency signal from audio frequency generating device L in proportion to the level of the detection output and sends the amplified result to speaker device S. Consequently, when the strength of the signal transmitted from the emergency car becomes large according to approach of the emergency car, the level of the detection output becomes large, and the output level of the amplifying device becomes large, and the output of the speaker becomes large. Thus, since the audio frequency signal generating device is provided in the receiver side, it is unnecessary to add audible signal information into the transmission signal and provide the demodulating circuit in the receiver side.
JP278180A 1980-01-14 1980-01-14 alarm system Expired JPS6027080B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP278180A JPS6027080B2 (en) 1980-01-14 1980-01-14 alarm system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP278180A JPS6027080B2 (en) 1980-01-14 1980-01-14 alarm system

Publications (2)

Publication Number Publication Date
JPS56100536A true JPS56100536A (en) 1981-08-12
JPS6027080B2 JPS6027080B2 (en) 1985-06-27

Family

ID=11538874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP278180A Expired JPS6027080B2 (en) 1980-01-14 1980-01-14 alarm system

Country Status (1)

Country Link
JP (1) JPS6027080B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050552U (en) * 1983-09-12 1985-04-09 株式会社ケンウッド emergency alert system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050552U (en) * 1983-09-12 1985-04-09 株式会社ケンウッド emergency alert system

Also Published As

Publication number Publication date
JPS6027080B2 (en) 1985-06-27

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