GB328325A - Improvements in or relating to call recording apparatus for use in telephone systems - Google Patents

Improvements in or relating to call recording apparatus for use in telephone systems

Info

Publication number
GB328325A
GB328325A GB274929A GB274929A GB328325A GB 328325 A GB328325 A GB 328325A GB 274929 A GB274929 A GB 274929A GB 274929 A GB274929 A GB 274929A GB 328325 A GB328325 A GB 328325A
Authority
GB
United Kingdom
Prior art keywords
relay
springs
magnet
magnets
platen roller
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
GB274929A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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
Priority to BE358514D priority Critical patent/BE358514A/xx
Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Priority to GB274929A priority patent/GB328325A/en
Priority to FR671317D priority patent/FR671317A/fr
Publication of GB328325A publication Critical patent/GB328325A/en
Expired 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
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
GB274929A 1929-01-26 1929-01-26 Improvements in or relating to call recording apparatus for use in telephone systems Expired GB328325A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE358514D BE358514A (no) 1929-01-26
GB274929A GB328325A (en) 1929-01-26 1929-01-26 Improvements in or relating to call recording apparatus for use in telephone systems
FR671317D FR671317A (fr) 1929-01-26 1929-03-12 Perfectionnements aux systèmes téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB274929A GB328325A (en) 1929-01-26 1929-01-26 Improvements in or relating to call recording apparatus for use in telephone systems

Publications (1)

Publication Number Publication Date
GB328325A true GB328325A (en) 1930-04-28

Family

ID=9745152

Family Applications (1)

Application Number Title Priority Date Filing Date
GB274929A Expired GB328325A (en) 1929-01-26 1929-01-26 Improvements in or relating to call recording apparatus for use in telephone systems

Country Status (3)

Country Link
BE (1) BE358514A (no)
FR (1) FR671317A (no)
GB (1) GB328325A (no)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3809051A1 (de) * 1988-03-18 1989-09-28 Rheinmetall Gmbh Verfahren zur herstellung einer einlage zum belegen einer sprengstoffladung

Also Published As

Publication number Publication date
BE358514A (no)
FR671317A (fr) 1929-12-11

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