JPS5217762A - Monitoring circuit of operating relays condition - Google Patents

Monitoring circuit of operating relays condition

Info

Publication number
JPS5217762A
JPS5217762A JP9303575A JP9303575A JPS5217762A JP S5217762 A JPS5217762 A JP S5217762A JP 9303575 A JP9303575 A JP 9303575A JP 9303575 A JP9303575 A JP 9303575A JP S5217762 A JPS5217762 A JP S5217762A
Authority
JP
Japan
Prior art keywords
condition
monitoring circuit
operating relays
relays
operating
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
JP9303575A
Other languages
Japanese (ja)
Inventor
Masaru Takamiko
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 JP9303575A priority Critical patent/JPS5217762A/en
Publication of JPS5217762A publication Critical patent/JPS5217762A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To monitor the condition of the relays in a circuit composed of magnetic relays (used in telephone switch board etc.) by photo-couplers.
COPYRIGHT: (C)1977,JPO&Japio
JP9303575A 1975-08-01 1975-08-01 Monitoring circuit of operating relays condition Pending JPS5217762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9303575A JPS5217762A (en) 1975-08-01 1975-08-01 Monitoring circuit of operating relays condition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9303575A JPS5217762A (en) 1975-08-01 1975-08-01 Monitoring circuit of operating relays condition

Publications (1)

Publication Number Publication Date
JPS5217762A true JPS5217762A (en) 1977-02-09

Family

ID=14071226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9303575A Pending JPS5217762A (en) 1975-08-01 1975-08-01 Monitoring circuit of operating relays condition

Country Status (1)

Country Link
JP (1) JPS5217762A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5427706A (en) * 1977-08-04 1979-03-02 Fujitsu Ltd Traffic measurement system
JPS59149087A (en) * 1983-02-15 1984-08-25 松下電器産業株式会社 Transfer unit for printing curved surface
JPS61121060U (en) * 1985-07-04 1986-07-30

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834030B1 (en) * 1969-05-02 1973-10-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834030B1 (en) * 1969-05-02 1973-10-18

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5427706A (en) * 1977-08-04 1979-03-02 Fujitsu Ltd Traffic measurement system
JPS59149087A (en) * 1983-02-15 1984-08-25 松下電器産業株式会社 Transfer unit for printing curved surface
JPH032067B2 (en) * 1983-02-15 1991-01-14 Matsushita Electric Ind Co Ltd
JPS61121060U (en) * 1985-07-04 1986-07-30

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