GB779269A - Improvements in or relating to burglar alarms - Google Patents

Improvements in or relating to burglar alarms

Info

Publication number
GB779269A
GB779269A GB2624954A GB2624954A GB779269A GB 779269 A GB779269 A GB 779269A GB 2624954 A GB2624954 A GB 2624954A GB 2624954 A GB2624954 A GB 2624954A GB 779269 A GB779269 A GB 779269A
Authority
GB
United Kingdom
Prior art keywords
contactor
disc
recorded message
head
connection
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
GB2624954A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2624954A priority Critical patent/GB779269A/en
Publication of GB779269A publication Critical patent/GB779269A/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)
  • Alarm Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

779,269. Automatic exchange systems, LANDER, A. Nov. 3, 1955 [Sept. 10, 1954], No. 26249/54. Class 40 (4). In a substation arrangement for establishing a connection over the automatic telephone network in response to the operation of a burglar detector and for sending a recorded message over the connection, the disc which produces the impulse trains to establish the connection is separate from the gramophone record carrying the recorded message, and is mounted on a shaft which is non-coaxial with that carrying the gramophone record. The impulsing disc 9 has a continuous groove tracked from the centre to the periphery by a tracking needle carried by a contactor head. After this head has tracked the first few convolutions 10 (to allow time for the reversion of dial tone from the exchange) a contactor mounted on the head engages the ramp members 12, consisting of wire loops mounted in holes 12A adjacent the groove, which are grouped so as to operate the contactor to produce the required impulse trains (e.g. " 999 "). The contactor then tracks off the edge of the disc to come to rest on a rest member. During this time the pick-up traverses a plain portion of the gramophone record, and thereafter reaches the portion of the record containing the recorded message.
GB2624954A 1954-09-10 1954-09-10 Improvements in or relating to burglar alarms Expired GB779269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2624954A GB779269A (en) 1954-09-10 1954-09-10 Improvements in or relating to burglar alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2624954A GB779269A (en) 1954-09-10 1954-09-10 Improvements in or relating to burglar alarms

Publications (1)

Publication Number Publication Date
GB779269A true GB779269A (en) 1957-07-17

Family

ID=10240682

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2624954A Expired GB779269A (en) 1954-09-10 1954-09-10 Improvements in or relating to burglar alarms

Country Status (1)

Country Link
GB (1) GB779269A (en)

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