JPS58164359U - public telephone - Google Patents
public telephoneInfo
- Publication number
- JPS58164359U JPS58164359U JP6172782U JP6172782U JPS58164359U JP S58164359 U JPS58164359 U JP S58164359U JP 6172782 U JP6172782 U JP 6172782U JP 6172782 U JP6172782 U JP 6172782U JP S58164359 U JPS58164359 U JP S58164359U
- Authority
- JP
- Japan
- Prior art keywords
- call
- power supply
- relay
- public telephone
- power
- 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
Links
Landscapes
- Prepayment Telephone Systems (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の公衆電話機を示′すブロック図である。
第２図は本考案の第１実施例の構成を示すブロック図、
第３図は本考案の第２実施例を示すブロック図である。
１１・・・・・・公衆電話機、１２・・・・・・制御回
路、１３・・・・・・通話リレー、１３ａ・・・・・・
接点、１４・・・・・・交換機、１５・・・・・・通話
回路、２１・・・・・・電源監視リレー、２−１ａ・・
・・・・第１の接点、２１ｂ・・・・・・第２の接点、
２２・・・・・・フックスイッチ、２３・・・・・・ダ
イオード、２４．２５・・・・・・トランジスタ、２６
．２７・・・・・・ツ 。
エナーダイオード。FIG. 1 is a block diagram showing a conventional public telephone. FIG. 2 is a block diagram showing the configuration of the first embodiment of the present invention;
FIG. 3 is a block diagram showing a second embodiment of the present invention. 11...Public telephone, 12...Control circuit, 13...Telephone relay, 13a...
Contact, 14... Exchange, 15... Call circuit, 21... Power monitoring relay, 2-1a...
....first contact, 21b...second contact,
22...Hook switch, 23...Diode, 24.25...Transistor, 26
．． 27...tsu. Ener diode.
Claims (1)
が有料通話の場合に転極するとともに、商用電源を制御
回路電源とし該商用電源の停電時には通話リレニの復１
田はって通話リレー接点を開放して通話ループを切断す
る公衆電話機において；前記商用電源の停電時に前記通
話リレーより先に復旧しその接点によって停電時に通話
ループを保持する電源監視リレーと、商用電源の停電時
および通話ループ電流の転極時に前記電源監視リレーの
動作によって前記通話回路への通話ループ電流の供給を
阻止するダイオードとを備えたことを特徴とする公衆電
話機。The polarity of the call loop current supplied from the exchange to the call circuit is reversed in the case of a paid call, and the commercial power supply is used as the control circuit power supply, and in the event of a power outage of the commercial power supply, the call relay is restored.
In a public telephone that opens a call relay contact to disconnect the call loop; a power monitoring relay that recovers before the call relay when the commercial power supply is out of power and maintains the call loop during the power outage by the contact; 1. A public telephone set comprising: a diode that blocks the supply of the call loop current to the call circuit by operating the power supply monitoring relay during a power outage or when the call loop current changes polarity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6172782U JPS58164359U (en) | 1982-04-27 | 1982-04-27 | public telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6172782U JPS58164359U (en) | 1982-04-27 | 1982-04-27 | public telephone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58164359U true JPS58164359U (en) | 1983-11-01 |
| JPS6333395Y2 JPS6333395Y2 (en) | 1988-09-06 |
Family
ID=30071909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6172782U Granted JPS58164359U (en) | 1982-04-27 | 1982-04-27 | public telephone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58164359U (en) |
-
1982
- 1982-04-27 JP JP6172782U patent/JPS58164359U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6333395Y2 (en) | 1988-09-06 |
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