GB320380A - Improvements in and relating to automatic or semi-automatic telephone systems - Google Patents

Improvements in and relating to automatic or semi-automatic telephone systems

Info

Publication number
GB320380A
GB320380A GB20147/28A GB2014728A GB320380A GB 320380 A GB320380 A GB 320380A GB 20147/28 A GB20147/28 A GB 20147/28A GB 2014728 A GB2014728 A GB 2014728A GB 320380 A GB320380 A GB 320380A
Authority
GB
United Kingdom
Prior art keywords
relay
circuit
over
register
group
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
GB20147/28A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB320380A publication Critical patent/GB320380A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • C23G1/065—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors sulfur-containing compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
GB20147/28A 1929-10-04 1928-07-11 Improvements in and relating to automatic or semi-automatic telephone systems Expired GB320380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US370380XA 1929-10-04 1929-10-04

Publications (1)

Publication Number Publication Date
GB320380A true GB320380A (en) 1929-10-11

Family

ID=21892107

Family Applications (2)

Application Number Title Priority Date Filing Date
GB20147/28A Expired GB320380A (en) 1929-10-04 1928-07-11 Improvements in and relating to automatic or semi-automatic telephone systems
GB29738/30A Expired GB370380A (en) 1929-10-04 1930-10-04 Improvements in or relating to the pickling of metals, and the like processes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB29738/30A Expired GB370380A (en) 1929-10-04 1930-10-04 Improvements in or relating to the pickling of metals, and the like processes

Country Status (2)

Country Link
FR (1) FR677069A (enrdf_load_stackoverflow)
GB (2) GB320380A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120305C1 (enrdf_load_stackoverflow) * 1991-06-20 1992-08-27 Mtu Muenchen Gmbh
CN103194760B (zh) * 2013-04-02 2015-07-08 北京化工大学 一种处理石油储备设备内部的硫铁化合物的泡沫型清洗剂

Also Published As

Publication number Publication date
FR677069A (enrdf_load_stackoverflow)
GB370380A (en) 1932-04-07

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