GB837160A - Improvements in and relating to a rectifying filter for a telephone fee meter - Google Patents
Improvements in and relating to a rectifying filter for a telephone fee meterInfo
- Publication number
- GB837160A GB837160A GB1280/58A GB128058A GB837160A GB 837160 A GB837160 A GB 837160A GB 1280/58 A GB1280/58 A GB 1280/58A GB 128058 A GB128058 A GB 128058A GB 837160 A GB837160 A GB 837160A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- pulses
- transistor
- meter
- burats
- 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
- 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
- H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measuring Volume Flow (AREA)
Abstract
837,160. Automatic exchange systems. SODECO SOC. DES COMPTEURS DE GENEVE. Jan. 14, 1958 [Jan. 22, 1957], No. 1280/58. Class 40 (4). Metering at a substation is effected by burats of 16 kc/s. pulses and the invention is concerned with accurate response to metering burats. A resonant circuit passes pulses of the required frequency to a rectifying and voltage doubling circuit 5, 6, 7, 8 which feeds the emitter-base circuit of a transistor 9, the collector circuit of which includes the winding of a meter 10. The end of the burat of pulses produces an immediate cessation of current through the meter. If the substation is close to the exchange the voltage on the line may be high. Gas tube 4 then ignites, so detuning the filter circuit which passes on a limited amount of current. The tube 4 may be in parallel with condenser 2 and the transistor circuit may be modified in detail (Figs. 2 and 5, not shown). The transistor may be replaced by a resonant circuit 11, 12, Fig. 3, which produces a rapid discharge of condensers 7, 8 at the end of the burst of pulses.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH837160X | 1957-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB837160A true GB837160A (en) | 1960-06-09 |
Family
ID=4540832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1280/58A Expired GB837160A (en) | 1957-01-22 | 1958-01-14 | Improvements in and relating to a rectifying filter for a telephone fee meter |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE563974A (en) |
| CH (1) | CH350019A (en) |
| DE (1) | DE1017668B (en) |
| GB (1) | GB837160A (en) |
| NL (2) | NL224242A (en) |
-
0
- NL NL111939D patent/NL111939C/xx active
- BE BE563974D patent/BE563974A/xx unknown
- NL NL224242D patent/NL224242A/xx unknown
-
1957
- 1957-01-22 CH CH350019D patent/CH350019A/en unknown
- 1957-02-05 DE DES52210A patent/DE1017668B/en active Pending
-
1958
- 1958-01-14 GB GB1280/58A patent/GB837160A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH350019A (en) | 1960-11-15 |
| BE563974A (en) | |
| NL224242A (en) | |
| DE1017668B (en) | 1957-10-17 |
| NL111939C (en) |
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