GB1238848A - - Google Patents

Info

Publication number
GB1238848A
GB1238848A GB1238848DA GB1238848A GB 1238848 A GB1238848 A GB 1238848A GB 1238848D A GB1238848D A GB 1238848DA GB 1238848 A GB1238848 A GB 1238848A
Authority
GB
United Kingdom
Prior art keywords
relay
message
head
alarm
tracks
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
Other languages
English (en)
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 filed Critical
Publication of GB1238848A publication Critical patent/GB1238848A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H04M11/045—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems using recorded signals, e.g. speech

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB1238848D 1967-10-26 1967-10-26 Expired GB1238848A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4878967 1967-10-26

Publications (1)

Publication Number Publication Date
GB1238848A true GB1238848A (enrdf_load_stackoverflow) 1971-07-14

Family

ID=10449912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1238848D Expired GB1238848A (enrdf_load_stackoverflow) 1967-10-26 1967-10-26

Country Status (1)

Country Link
GB (1) GB1238848A (enrdf_load_stackoverflow)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees