JPS5450352A - Centralized meter inspector - Google Patents
Centralized meter inspectorInfo
- 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
Links
Landscapes
- Small-Scale Networks (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Arrangements For Transmission Of Measured Signals (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
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)
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 |
-
1977
- 1977-09-28 JP JP11561377A patent/JPS5450352A/en active Pending
Cited By (6)
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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