GB673788A - Improvements in or relating to circuit-arrangements for use in automatic signalling systems of telephone systems - Google Patents
Improvements in or relating to circuit-arrangements for use in automatic signalling systems of telephone systemsInfo
- Publication number
- GB673788A GB673788A GB25998/50A GB2599850A GB673788A GB 673788 A GB673788 A GB 673788A GB 25998/50 A GB25998/50 A GB 25998/50A GB 2599850 A GB2599850 A GB 2599850A GB 673788 A GB673788 A GB 673788A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- systems
- wire
- arrangements
- relating
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
- H04Q1/36—Pulse-correcting arrangements, e.g. for reducing effects due to interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
- H04M15/10—Metering calls from calling party, i.e. A-party charged for the communication
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
673,788. Telephone exchange systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 25, 1950 [Oct. 28, 1949], No. 25998/50. Class 40 (iv). A relay which has to be operated over a conversation wire while conversation is taking place comprises a short - circuited winding. This winding damps out the currents induced in the wire due to the change of flux in the relay on operation and also slows up the rate of operation of the relay so reducing the rate of change of flux. The relay may also comprise a thick residual stop for the same purpose. The relay in question Z may be a metering relay operated by metering pulses from a time zone transmitter TZO which are smoothed by the network R, C6, L4, C5, L3 and applied to the b-wire.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL673788X | 1949-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB673788A true GB673788A (en) | 1952-06-11 |
Family
ID=19802212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25998/50A Expired GB673788A (en) | 1949-10-28 | 1950-10-25 | Improvements in or relating to circuit-arrangements for use in automatic signalling systems of telephone systems |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE828997C (en) |
FR (1) | FR1026583A (en) |
GB (1) | GB673788A (en) |
-
1950
- 1950-10-25 GB GB25998/50A patent/GB673788A/en not_active Expired
- 1950-10-25 DE DEN3044A patent/DE828997C/en not_active Expired
- 1950-10-26 FR FR1026583D patent/FR1026583A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE828997C (en) | 1952-01-21 |
FR1026583A (en) | 1953-04-29 |
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