JPS53144300A - Alarm device - Google Patents

Alarm device

Info

Publication number
JPS53144300A
JPS53144300A JP5870277A JP5870277A JPS53144300A JP S53144300 A JPS53144300 A JP S53144300A JP 5870277 A JP5870277 A JP 5870277A JP 5870277 A JP5870277 A JP 5870277A JP S53144300 A JPS53144300 A JP S53144300A
Authority
JP
Japan
Prior art keywords
physical quantity
variation
alarm device
alarm
sound
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.)
Pending
Application number
JP5870277A
Other languages
Japanese (ja)
Inventor
Koshiro Iwasaki
Junichi Mameta
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5870277A priority Critical patent/JPS53144300A/en
Publication of JPS53144300A publication Critical patent/JPS53144300A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Alarm Devices (AREA)

Abstract

PURPOSE: To detect the variation amount of the physical quantity as well for the device which gives an alarm when detecting the fact that the varying physical quantity becomes higher or lower than the prescribed level, and thus to produce the alarm sound with variation of the tone or the sound volume in accordance with variation of the physical quantity.
COPYRIGHT: (C)1978,JPO&Japio
JP5870277A 1977-05-23 1977-05-23 Alarm device Pending JPS53144300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5870277A JPS53144300A (en) 1977-05-23 1977-05-23 Alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5870277A JPS53144300A (en) 1977-05-23 1977-05-23 Alarm device

Publications (1)

Publication Number Publication Date
JPS53144300A true JPS53144300A (en) 1978-12-15

Family

ID=13091843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5870277A Pending JPS53144300A (en) 1977-05-23 1977-05-23 Alarm device

Country Status (1)

Country Link
JP (1) JPS53144300A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104616424A (en) * 2014-06-30 2015-05-13 杨泽松 System for preventing children from kicking quilt

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993002U (en) * 1972-11-30 1974-08-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4993002U (en) * 1972-11-30 1974-08-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104616424A (en) * 2014-06-30 2015-05-13 杨泽松 System for preventing children from kicking quilt

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