GB463771A - An automatic distress signal transmitter with number setting mechanism for sending selector impulses over a subscriber's line to an automatic telephone exchange - Google Patents

An automatic distress signal transmitter with number setting mechanism for sending selector impulses over a subscriber's line to an automatic telephone exchange

Info

Publication number
GB463771A
GB463771A GB20434/36A GB2043436A GB463771A GB 463771 A GB463771 A GB 463771A GB 20434/36 A GB20434/36 A GB 20434/36A GB 2043436 A GB2043436 A GB 2043436A GB 463771 A GB463771 A GB 463771A
Authority
GB
United Kingdom
Prior art keywords
automatic
subscriber
line
alarm
signal transmitter
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
GB20434/36A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB463771A publication Critical patent/GB463771A/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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
    • 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)

Abstract

463,771. Gramophones. TELEFONAKTIEBOLAGET L. M. ERICSSON. July 23, 1936, No. 20434. Convention date, Aug. 8, 1935. [Class 40 (ii)] [Also in Group XXXIX] In automatic telephone sub-station burglar &c. alarm apparatus including a gramophone for sending an alarm to the receiving station as described in Specification 399,675, the turntable 6, which may be spring or electrically driven, is normally held by the engagement of a pin 41 with a lever 40 controlled by plunger 39. When the alarm circuit is operated, relay 44 releases drop 46 which forces down plunger 39 to release the turntable. The turntable may be stopped after the transmission of the alarm by engagement of pin 41 with a lever 49 operated by cam mechanism 20 which is driven by spring drum 2 and controls the sequence of operations.
GB20434/36A 1935-08-08 1936-07-23 An automatic distress signal transmitter with number setting mechanism for sending selector impulses over a subscriber's line to an automatic telephone exchange Expired GB463771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE463771X 1935-08-08

Publications (1)

Publication Number Publication Date
GB463771A true GB463771A (en) 1937-04-06

Family

ID=20310239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20434/36A Expired GB463771A (en) 1935-08-08 1936-07-23 An automatic distress signal transmitter with number setting mechanism for sending selector impulses over a subscriber's line to an automatic telephone exchange

Country Status (2)

Country Link
FR (1) FR809207A (en)
GB (1) GB463771A (en)

Also Published As

Publication number Publication date
FR809207A (en) 1937-02-26

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