JPS6342236B2 - - Google Patents

Info

Publication number
JPS6342236B2
JPS6342236B2 JP54018454A JP1845479A JPS6342236B2 JP S6342236 B2 JPS6342236 B2 JP S6342236B2 JP 54018454 A JP54018454 A JP 54018454A JP 1845479 A JP1845479 A JP 1845479A JP S6342236 B2 JPS6342236 B2 JP S6342236B2
Authority
JP
Japan
Prior art keywords
ultrasonic
alarm
frequency selection
waves
pattern
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
JP54018454A
Other languages
English (en)
Japanese (ja)
Other versions
JPS55112692A (en
Inventor
Shiro Shirai
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.)
SEKOMU KK
Original Assignee
SEKOMU 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 SEKOMU KK filed Critical SEKOMU KK
Priority to JP1845479A priority Critical patent/JPS55112692A/ja
Publication of JPS55112692A publication Critical patent/JPS55112692A/ja
Publication of JPS6342236B2 publication Critical patent/JPS6342236B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
JP1845479A 1979-02-21 1979-02-21 Error prevention system in ultrasonic wave alarm Granted JPS55112692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1845479A JPS55112692A (en) 1979-02-21 1979-02-21 Error prevention system in ultrasonic wave alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1845479A JPS55112692A (en) 1979-02-21 1979-02-21 Error prevention system in ultrasonic wave alarm

Publications (2)

Publication Number Publication Date
JPS55112692A JPS55112692A (en) 1980-08-30
JPS6342236B2 true JPS6342236B2 (enrdf_load_stackoverflow) 1988-08-22

Family

ID=11972069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1845479A Granted JPS55112692A (en) 1979-02-21 1979-02-21 Error prevention system in ultrasonic wave alarm

Country Status (1)

Country Link
JP (1) JPS55112692A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2135475A1 (en) * 1993-03-11 1994-09-15 Hideo Arakawa Crime prevention display device, exhibit crime prevention alarm control method and apparatus therefor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4984269A (enrdf_load_stackoverflow) * 1972-12-15 1974-08-13
JPS53114397A (en) * 1977-03-14 1978-10-05 Tokai Kagaku Kogyo Kk Supersonic alarm

Also Published As

Publication number Publication date
JPS55112692A (en) 1980-08-30

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