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JPS5546152A - Earthquake sensing unit - Google Patents

Earthquake sensing unit

Info

Publication number
JPS5546152A
JPS5546152A JP11969378A JP11969378A JPS5546152A JP S5546152 A JPS5546152 A JP S5546152A JP 11969378 A JP11969378 A JP 11969378A JP 11969378 A JP11969378 A JP 11969378A JP S5546152 A JPS5546152 A JP S5546152A
Authority
JP
Japan
Prior art keywords
concave
sensing unit
steel ball
entire circumference
stable operation
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
JP11969378A
Other languages
Japanese (ja)
Inventor
Toshihiro Shigemura
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP11969378A priority Critical patent/JPS5546152A/en
Publication of JPS5546152A publication Critical patent/JPS5546152A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To give stable operation at earthquake region and to reduce the sensitivity to other mechanical vibrations, by providing the convex curve having fine curvature around the entire circumference at the upper end of the concave or hole mounting steel ball.
CONSTITUTION: The circular concave 12 3.35mm in diameter is placed at the upper surface of the mounting stand 11, and the fine convex curved surface 13 in 0.2W 0.3mm in curvature is formed at the entire circumference at the upper end of the concave 12. The operation characteristics of steel ball having the radius of 7/8 inch for example, mounted on this concave 12 shows very stable operation at the earthquake region (1.4W3.3Hz) and it is insensitive to the mechanical vibration (more than 10Hz).
COPYRIGHT: (C)1980,JPO&Japio
JP11969378A 1978-09-28 1978-09-28 Earthquake sensing unit Pending JPS5546152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11969378A JPS5546152A (en) 1978-09-28 1978-09-28 Earthquake sensing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11969378A JPS5546152A (en) 1978-09-28 1978-09-28 Earthquake sensing unit

Publications (1)

Publication Number Publication Date
JPS5546152A true JPS5546152A (en) 1980-03-31

Family

ID=14767714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11969378A Pending JPS5546152A (en) 1978-09-28 1978-09-28 Earthquake sensing unit

Country Status (1)

Country Link
JP (1) JPS5546152A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6163239A (en) * 1984-09-04 1986-04-01 Teikoku Denki Seisakusho:Kk Method of high-frequency thawing of frozen tuna

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126359U (en) * 1974-08-15 1976-02-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5126359U (en) * 1974-08-15 1976-02-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6163239A (en) * 1984-09-04 1986-04-01 Teikoku Denki Seisakusho:Kk Method of high-frequency thawing of frozen tuna
JPS6225008B2 (en) * 1984-09-04 1987-06-01 Teikoku Denki Seisakusho Kk

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