FR1028532A - Dispositif indicateur visuel - Google Patents

Dispositif indicateur visuel

Info

Publication number
FR1028532A
FR1028532A FR1028532DA FR1028532A FR 1028532 A FR1028532 A FR 1028532A FR 1028532D A FR1028532D A FR 1028532DA FR 1028532 A FR1028532 A FR 1028532A
Authority
FR
France
Prior art keywords
indicating device
visual indicating
visual
indicating
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)
Inventor
Marcel-Andre Procot
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 FR1028532A publication Critical patent/FR1028532A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
    • G08B13/1654—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems
    • G08B13/1672—Actuation by interference with mechanical vibrations in air or other fluid using passive vibration detection systems using sonic detecting means, e.g. a microphone operating in the audio frequency range
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
FR1028532D 1950-11-28 1950-11-28 Dispositif indicateur visuel Expired FR1028532A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1028532T 1950-11-28

Publications (1)

Publication Number Publication Date
FR1028532A true FR1028532A (fr) 1953-05-26

Family

ID=9581326

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1028532D Expired FR1028532A (fr) 1950-11-28 1950-11-28 Dispositif indicateur visuel

Country Status (1)

Country Link
FR (1) FR1028532A (fr)

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