GB377489A - Improvements in alarm devices for use in connection with telephone systems - Google Patents

Improvements in alarm devices for use in connection with telephone systems

Info

Publication number
GB377489A
GB377489A GB25787/31A GB2578731A GB377489A GB 377489 A GB377489 A GB 377489A GB 25787/31 A GB25787/31 A GB 25787/31A GB 2578731 A GB2578731 A GB 2578731A GB 377489 A GB377489 A GB 377489A
Authority
GB
United Kingdom
Prior art keywords
shaft
disc
alarm
magnet
lifted
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
GB25787/31A
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
Priority to DE1930H0040230 priority Critical patent/DE567446C/en
Priority to BE382314D priority patent/BE382314A/xx
Priority to FR722639D priority patent/FR722639A/en
Priority to CH162598D priority patent/CH162598A/en
Application filed by Individual filed Critical Individual
Priority to GB25787/31A priority patent/GB377489A/en
Publication of GB377489A publication Critical patent/GB377489A/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)

Abstract

377,489. Police alarm systems. HUEMER, L., 12, Keifernstrasse, Dusseldorf, Germany. Sept. 14, 1931, No. 25787. [Class 40 (i).] A telephone substation is provided with apparatus by which, in the event of an alarm, the receiver is lifted and the impulse dial is operated automatically to call a police station, while a gramophone is started to transmit a message thereto. When an alarm occurs, a magnet 8 energizes and by means of a lever 6 releases a gear wheel 3 which rotates under control of a spring 4 and drives the shaft 1. Alternatively, the gear wheel 3 may be driven by a motor the circuit of which is closed by the magnet 8. The switch-hook 19 is raised by means of a lever 15 carrying a roller 17 which is lifted from a notch in a disc 13 upon the rotation of the shaft 1. A disc 23 toothed at a part of its periphery rotates through a single revolution a disc 28 which is provided with projecting studs 29 for engaging a toothed wheel 12 fixed to the shaft of the impulse dial 20, in order to effect the setting movements in accordance with the number to be transmitted. The shaft 1 also drives a gramophone turntable 34, the sound being brought to the vicinity of the microphone by means of a flexible tube 47. Wipers 40, 41, 42 co-operate with a contact disc 38 having segments arranged so that the circuit of the magnet 8 is maintained independently of the alarm contact for a complete revolution of the shaft 1, while a buzzer 46 is sounded intermittently.
GB25787/31A 1930-08-30 1931-09-14 Improvements in alarm devices for use in connection with telephone systems Expired GB377489A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE1930H0040230 DE567446C (en) 1930-08-30 1930-08-30 Alarm device for the automatic transmission of an alarm call over the subscriber line of a self-access telephone network
BE382314D BE382314A (en) 1930-08-30 1931-08-28
FR722639D FR722639A (en) 1930-08-30 1931-08-28 Alarm signaling signal for telephone circuits
CH162598D CH162598A (en) 1930-08-30 1931-08-28 Alarm device.
GB25787/31A GB377489A (en) 1930-08-30 1931-09-14 Improvements in alarm devices for use in connection with telephone systems

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1930H0040230 DE567446C (en) 1930-08-30 1930-08-30 Alarm device for the automatic transmission of an alarm call over the subscriber line of a self-access telephone network
CH162598T 1931-08-28
GB25787/31A GB377489A (en) 1930-08-30 1931-09-14 Improvements in alarm devices for use in connection with telephone systems

Publications (1)

Publication Number Publication Date
GB377489A true GB377489A (en) 1932-07-28

Family

ID=10233294

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25787/31A Expired GB377489A (en) 1930-08-30 1931-09-14 Improvements in alarm devices for use in connection with telephone systems

Country Status (5)

Country Link
BE (1) BE382314A (en)
CH (1) CH162598A (en)
DE (1) DE567446C (en)
FR (1) FR722639A (en)
GB (1) GB377489A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE896065C (en) * 1950-06-07 1953-11-09 Samuel Dunseith Mckellen Alarm device with dials for automatic telecommunication connection
DE1035700B (en) * 1955-09-23 1958-08-07 Siemens Ag Circuit arrangement for the delivery of messages via telephone lines

Also Published As

Publication number Publication date
BE382314A (en) 1931-09-30
CH162598A (en) 1933-06-30
FR722639A (en) 1932-03-26
DE567446C (en) 1933-01-03

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