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
Links
Landscapes
- Burglar Alarm Systems (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5638049A (en) * | 1993-03-11 | 1997-06-10 | Arakawa & Co., Ltd. | Crime prevention display device, exhibit crime prevention alarm control method and apparatus therefor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4984269A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1972-12-15 | 1974-08-13 | ||
JPS53114397A (en) * | 1977-03-14 | 1978-10-05 | Tokai Kagaku Kogyo Kk | Supersonic alarm |
-
1979
- 1979-02-21 JP JP1845479A patent/JPS55112692A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS55112692A (en) | 1980-08-30 |
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