FR1069004A - Appareil de signalisation électromagnétique à projection lumineuse sur un écran - Google Patents

Appareil de signalisation électromagnétique à projection lumineuse sur un écran

Info

Publication number
FR1069004A
FR1069004A FR1069004DA FR1069004A FR 1069004 A FR1069004 A FR 1069004A FR 1069004D A FR1069004D A FR 1069004DA FR 1069004 A FR1069004 A FR 1069004A
Authority
FR
France
Prior art keywords
screen
light projection
signaling device
electromagnetic signaling
electromagnetic
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
Giuseppe Previati
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 FR1069004A publication Critical patent/FR1069004A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/40—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character is selected from a number of characters arranged one beside the other, e.g. on a common carrier plate
    • G09F9/405—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character is selected from a number of characters arranged one beside the other, e.g. on a common carrier plate the selected character being projected on a common screen accommodating only one character at a time, to provide the same display position for all characters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
FR1069004D 1951-10-16 1952-10-15 Appareil de signalisation électromagnétique à projection lumineuse sur un écran Expired FR1069004A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1069004X 1951-10-16

Publications (1)

Publication Number Publication Date
FR1069004A true FR1069004A (fr) 1954-07-02

Family

ID=11430247

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1069004D Expired FR1069004A (fr) 1951-10-16 1952-10-15 Appareil de signalisation électromagnétique à projection lumineuse sur un écran

Country Status (1)

Country Link
FR (1) FR1069004A (fr)

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