DE2421005A1 - Drucktastensperre - Google Patents

Drucktastensperre

Info

Publication number
DE2421005A1
DE2421005A1 DE19742421005 DE2421005A DE2421005A1 DE 2421005 A1 DE2421005 A1 DE 2421005A1 DE 19742421005 DE19742421005 DE 19742421005 DE 2421005 A DE2421005 A DE 2421005A DE 2421005 A1 DE2421005 A1 DE 2421005A1
Authority
DE
Germany
Prior art keywords
push button
perforated plate
plunger
plate
touches
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.)
Pending
Application number
DE19742421005
Other languages
German (de)
English (en)
Inventor
Michael Peter Morgan-Jones
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of DE2421005A1 publication Critical patent/DE2421005A1/de
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Push-Button Switches (AREA)
  • Telephone Set Structure (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
DE19742421005 1973-06-28 1974-04-30 Drucktastensperre Pending DE2421005A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3079573A GB1437793A (enrdf_load_stackoverflow) 1973-06-28 1973-06-28

Publications (1)

Publication Number Publication Date
DE2421005A1 true DE2421005A1 (de) 1975-01-30

Family

ID=10313250

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19742421005 Pending DE2421005A1 (de) 1973-06-28 1974-04-30 Drucktastensperre

Country Status (2)

Country Link
DE (1) DE2421005A1 (enrdf_load_stackoverflow)
GB (1) GB1437793A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
GB1437793A (enrdf_load_stackoverflow) 1976-06-03

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