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FR1094811A - Improvements to automatic alarm devices - Google Patents

Improvements to automatic alarm devices

Info

Publication number
FR1094811A
FR1094811A FR1094811DA FR1094811A FR 1094811 A FR1094811 A FR 1094811A FR 1094811D A FR1094811D A FR 1094811DA FR 1094811 A FR1094811 A FR 1094811A
Authority
FR
France
Prior art keywords
automatic alarm
alarm devices
devices
automatic
alarm
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
French (fr)
Inventor
Samuel Dunseith Mckellen
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
Application granted granted Critical
Publication of FR1094811A publication Critical patent/FR1094811A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
    • 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)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Burglar Alarm Systems (AREA)
FR1094811D 1950-06-07 1951-06-07 Improvements to automatic alarm devices Expired FR1094811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14206/50A GB682276A (en) 1950-06-07 1950-06-07 Improvements in or relating to automatic alarm devices

Publications (1)

Publication Number Publication Date
FR1094811A true FR1094811A (en) 1955-05-24

Family

ID=10036978

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1094811D Expired FR1094811A (en) 1950-06-07 1951-06-07 Improvements to automatic alarm devices

Country Status (4)

Country Link
US (1) US2729707A (en)
CH (1) CH294194A (en)
FR (1) FR1094811A (en)
GB (1) GB682276A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128350A (en) * 1959-04-14 1964-04-07 Hesselgren Tore Signalling system
US3104286A (en) * 1960-07-15 1963-09-17 Mc Graw Edison Co Mechanical telephone dialing instrument

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867500A (en) * 1930-01-08 1932-07-12 Felix F Denzler Automatic fire and burglar alarm system
BE392860A (en) * 1931-12-06
US2036420A (en) * 1932-06-06 1936-04-07 Julius C Lowry Signal apparatus
BE424390A (en) * 1936-11-04
US2131565A (en) * 1937-02-16 1938-09-27 Lauersdorf Albino Oscar Automatic device for effecting telephone calls and transmitting signals
US2276954A (en) * 1939-12-13 1942-03-17 Bell Telephone Labor Inc Call transmitter
US2358586A (en) * 1942-10-20 1944-09-19 American Telephone & Telegraph Telephone call transmitter
FR956829A (en) * 1946-09-03 1950-02-08
US2469278A (en) * 1947-03-18 1949-05-03 Ralph A Sears Telephone alarm system

Also Published As

Publication number Publication date
CH294194A (en) 1953-10-31
US2729707A (en) 1956-01-03
GB682276A (en) 1952-11-05

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