JPS5450352A - Centralized meter inspector - Google Patents

Centralized meter inspector

Info

Publication number
JPS5450352A
JPS5450352A JP11561377A JP11561377A JPS5450352A JP S5450352 A JPS5450352 A JP S5450352A JP 11561377 A JP11561377 A JP 11561377A JP 11561377 A JP11561377 A JP 11561377A JP S5450352 A JPS5450352 A JP S5450352A
Authority
JP
Japan
Prior art keywords
switches
self
selector
selecting
address
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
JP11561377A
Other languages
Japanese (ja)
Inventor
Akihisa Ueda
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 JP11561377A priority Critical patent/JPS5450352A/en
Publication of JPS5450352A publication Critical patent/JPS5450352A/en
Pending legal-status Critical Current

Links

Landscapes

  • Arrangements For Transmission Of Measured Signals (AREA)
  • Small-Scale Networks (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE: To reduce the switching times of the selecting switches of a selector by comparing the address signals with the self-address of the selector thereby to effect the self-hold of the selector switches.
CONSTITUTION: The coincidence between the address signals from a meter inspecting station 1 and the self-address of a town selector 3A is detected by a comparator circuit 8 so that the output of an FF 9 is reversed into a set output. Then, the simiconductor selecting switches 10 and 11 are turned on so that the switches of the selector 3A are self-held. As a result, similar selector switches 4A, 4B and so on, which are placed in medium and higher residences of a designated town block 2A, similar selecting swithes 5A, 5B and so on for respective stairs, which are connected with the switches 4A, 4B and so on, and similar selecting switches 5A1, 5A2 and so on, which are connected therewith, are self-held so that the meter inspecting signals of the meters M1 and M2 of the respective residences are fed to the station 1 through the lines of the self-held switches. As a result, the centralized meter inspections are accomplished through the selectors having a long life time and a reduced number of switching times
COPYRIGHT: (C)1979,JPO&Japio
JP11561377A 1977-09-28 1977-09-28 Centralized meter inspector Pending JPS5450352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11561377A JPS5450352A (en) 1977-09-28 1977-09-28 Centralized meter inspector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11561377A JPS5450352A (en) 1977-09-28 1977-09-28 Centralized meter inspector

Publications (1)

Publication Number Publication Date
JPS5450352A true JPS5450352A (en) 1979-04-20

Family

ID=14666975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11561377A Pending JPS5450352A (en) 1977-09-28 1977-09-28 Centralized meter inspector

Country Status (1)

Country Link
JP (1) JPS5450352A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856566A (en) * 1981-09-29 1983-04-04 Matsushita Electric Ind Co Ltd Interphone system for housing development
JPS58106941A (en) * 1981-12-18 1983-06-25 Matsushita Electric Ind Co Ltd Master-slave type interphone device
JPS5952958A (en) * 1982-09-20 1984-03-27 Aihon Kk Interphone system for multiple dwelling houses

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5856566A (en) * 1981-09-29 1983-04-04 Matsushita Electric Ind Co Ltd Interphone system for housing development
JPH0330345B2 (en) * 1981-09-29 1991-04-30
JPS58106941A (en) * 1981-12-18 1983-06-25 Matsushita Electric Ind Co Ltd Master-slave type interphone device
JPS6233786B2 (en) * 1981-12-18 1987-07-22 Matsushita Electric Ind Co Ltd
JPS5952958A (en) * 1982-09-20 1984-03-27 Aihon Kk Interphone system for multiple dwelling houses
JPH0419739B2 (en) * 1982-09-20 1992-03-31 Aiphone Co Ltd

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