JPS55116224A - Earthquake detector - Google Patents

Earthquake detector

Info

Publication number
JPS55116224A
JPS55116224A JP2414179A JP2414179A JPS55116224A JP S55116224 A JPS55116224 A JP S55116224A JP 2414179 A JP2414179 A JP 2414179A JP 2414179 A JP2414179 A JP 2414179A JP S55116224 A JPS55116224 A JP S55116224A
Authority
JP
Japan
Prior art keywords
earthquake
voltage
polarity
conductive ball
couples
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
JP2414179A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6228842B2 (enrdf_load_stackoverflow
Inventor
Yoshihiro Nakatani
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP2414179A priority Critical patent/JPS55116224A/ja
Publication of JPS55116224A publication Critical patent/JPS55116224A/ja
Publication of JPS6228842B2 publication Critical patent/JPS6228842B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
JP2414179A 1979-03-01 1979-03-01 Earthquake detector Granted JPS55116224A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2414179A JPS55116224A (en) 1979-03-01 1979-03-01 Earthquake detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2414179A JPS55116224A (en) 1979-03-01 1979-03-01 Earthquake detector

Publications (2)

Publication Number Publication Date
JPS55116224A true JPS55116224A (en) 1980-09-06
JPS6228842B2 JPS6228842B2 (enrdf_load_stackoverflow) 1987-06-23

Family

ID=12130037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2414179A Granted JPS55116224A (en) 1979-03-01 1979-03-01 Earthquake detector

Country Status (1)

Country Link
JP (1) JPS55116224A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59163524A (ja) * 1983-03-08 1984-09-14 Alps Electric Co Ltd 無方向性移動検出器
JPS61178619A (ja) * 1985-02-04 1986-08-11 Nippon Denon Kk 振動感知装置
WO1991011737A1 (en) * 1990-01-25 1991-08-08 Matsushita Electric Industrial Co., Ltd. Earthquake sensor
JPH04118633U (ja) * 1991-04-03 1992-10-23 株式会社タカラ 振動センサ
JP2007205851A (ja) * 2006-02-01 2007-08-16 Seiko Instruments Inc 振動センサ
JP2007316040A (ja) * 2006-05-29 2007-12-06 Takahata Seiko Kk 水道メータユニット体

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51131984U (enrdf_load_stackoverflow) * 1975-04-17 1976-10-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51131984U (enrdf_load_stackoverflow) * 1975-04-17 1976-10-23

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59163524A (ja) * 1983-03-08 1984-09-14 Alps Electric Co Ltd 無方向性移動検出器
JPS61178619A (ja) * 1985-02-04 1986-08-11 Nippon Denon Kk 振動感知装置
WO1991011737A1 (en) * 1990-01-25 1991-08-08 Matsushita Electric Industrial Co., Ltd. Earthquake sensor
US5396223A (en) * 1990-01-25 1995-03-07 Matsushita Electric Industrial Co., Ltd. Earthquake detecting apparatus
JPH04118633U (ja) * 1991-04-03 1992-10-23 株式会社タカラ 振動センサ
JP2007205851A (ja) * 2006-02-01 2007-08-16 Seiko Instruments Inc 振動センサ
JP2007316040A (ja) * 2006-05-29 2007-12-06 Takahata Seiko Kk 水道メータユニット体

Also Published As

Publication number Publication date
JPS6228842B2 (enrdf_load_stackoverflow) 1987-06-23

Similar Documents

Publication Publication Date Title
JPS55116224A (en) Earthquake detector
JPS5365774A (en) Radiant ray detector
JPS52124829A (en) Common buss control circuit
JPS5210514A (en) Transformation device
JPS54153057A (en) Tactile detecting array
JPS5217886A (en) Multikind ion detector
JPS527768A (en) Device to detect specific gravity and surface of liquid
JPS52143833A (en) Method and device for charging by corona discharge
JPS53100446A (en) Trouble detecting device of electric machine and apparatus
JPS5230465A (en) Specific gravity difference separating device
JPS5279899A (en) Liquid crystal display unit
JPS5376860A (en) Inclination measuring system
JPS5476186A (en) Voltage detector
JPS51127672A (en) Explosionproof-type cathode-ray-tube
JPS5214464A (en) Surface resistance measuring device
JPS5250123A (en) Purity aberration detection equipment
JPS5220059A (en) Electric type level
JPS5263361A (en) Static electricity angle detection device
JPS5240375A (en) Maximum value measuring device
JPS51111027A (en) N+1 stand-by test method
JPS5316845A (en) Gas insulation protective gap device
JPS5614938A (en) Bubble and liquid level detecting system
JPS55112508A (en) Electronic compass
JPS5257866A (en) Acceleration level sensor
DEMINOV et al. Response of the ionosphere to rapid changes in large-scale electric fields. I- Atomic ions