GB172000A - Improvements in meters for telephone systems - Google Patents

Improvements in meters for telephone systems

Info

Publication number
GB172000A
GB172000A GB30630/21A GB3063021A GB172000A GB 172000 A GB172000 A GB 172000A GB 30630/21 A GB30630/21 A GB 30630/21A GB 3063021 A GB3063021 A GB 3063021A GB 172000 A GB172000 A GB 172000A
Authority
GB
United Kingdom
Prior art keywords
circuit
electricity
charge
spring
shunt
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
Application number
GB30630/21A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB172000A publication Critical patent/GB172000A/en
Expired legal-status Critical Current

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
    • H04M15/10—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)
  • Measurement Of Current Or Voltage (AREA)

Abstract

172,000. Siemens & Halske Akt.-Ges. Nov. 26, 1920, [Convention date]. Electrolytic meters.-A meter for telephone systems comprises a metallic conductor of predetermined dimensions immersed in an electrolyte and adapted to be disintegrated by a given quantity of electricity. The figure shows an example in which a copper wire 2 is sealed in the bottom of a glass concontainer 5 and soldered at its other end to a spring 3 held under tension. After a given quantity of electricity has passed, the wire 2 becomes so weak that it is drawn out of the electrolvte by the spring 3, thereby breaking the circuit. An attendant then inserts a new conductor, the number of replacements fixing the charge to be made. The apparatus is arranged in a local circuit which is closed for the duration of the conversation, and the strength of the current in the circuit may be varied according to the rate of charge. The cell may be connected in shunt across a signalling device which gives an indication when the shunt circuit is broken.
GB30630/21A 1920-11-26 1921-11-16 Improvements in meters for telephone systems Expired GB172000A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE172000X 1920-11-26

Publications (1)

Publication Number Publication Date
GB172000A true GB172000A (en) 1922-12-21

Family

ID=5689731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30630/21A Expired GB172000A (en) 1920-11-26 1921-11-16 Improvements in meters for telephone systems

Country Status (1)

Country Link
GB (1) GB172000A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4860269A (en) * 1986-11-08 1989-08-22 U.S. Philips Corporation Electrochemical time switching device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4860269A (en) * 1986-11-08 1989-08-22 U.S. Philips Corporation Electrochemical time switching device

Similar Documents

Publication Publication Date Title
Cahan et al. The Silver‐Silver Oxide Electrode
GB1475800A (en) Telephone transmission system
GB172000A (en) Improvements in meters for telephone systems
US1524937A (en) Electrode for electrolytic conductivity cells
US3424617A (en) Sealed battery with charge-control electrode
US1829935A (en) Storage battery and container therefor
US2794170A (en) Cable-testing apparatus
US1705944A (en) Electrolytic device
GB234788A (en) Level testing devices for electric accumulators
GB313208A (en) Improvements in or relating to electrical indicating and/or recording apparatus
GB1208653A (en) Improvements in or relating to methods of and/or means for finding average temperature over a period of time
US1694687A (en) Electrolyte-level gauge
US1264982A (en) Means and method for metering electricity.
US1724065A (en) Rectifier electrode
US1254939A (en) Means and method for metering electricity.
US2471660A (en) Storage battery with level indicator
Foster Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers
Lockwood Electricity, Magnetism and Electric Telegraphy
SU25647A1 (en) Device for the control test of dry galvanic cells
GB451817A (en) Improvements in methods of measuring the magnitude of the force of gravity
GB445336A (en) Apparatus for measuring or indicating the state of charge and discharge of an electric accumulator battery
GB190917488A (en) An Appliance for Preventing Fraud in connection with Electricity Meters.
PL33298B1 (en) Device for detecting direct current in conductors
US1384734A (en) Electrical testing system and apparatus
GB522140A (en) Telephone line tester