FR729083A - Device for automatic lighting of telephone devices - Google Patents

Device for automatic lighting of telephone devices

Info

Publication number
FR729083A
FR729083A FR729083DA FR729083A FR 729083 A FR729083 A FR 729083A FR 729083D A FR729083D A FR 729083DA FR 729083 A FR729083 A FR 729083A
Authority
FR
France
Prior art keywords
telephone devices
automatic lighting
lighting
automatic
telephone
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
Marcel-Jean-Pierre Veron
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 FR729083A publication Critical patent/FR729083A/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
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR729083D 1931-12-30 1931-12-30 Device for automatic lighting of telephone devices Expired FR729083A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR729083T 1931-12-30

Publications (1)

Publication Number Publication Date
FR729083A true FR729083A (en) 1932-07-18

Family

ID=9112228

Family Applications (1)

Application Number Title Priority Date Filing Date
FR729083D Expired FR729083A (en) 1931-12-30 1931-12-30 Device for automatic lighting of telephone devices

Country Status (1)

Country Link
FR (1) FR729083A (en)

Similar Documents

Publication Publication Date Title
FR729083A (en) Device for automatic lighting of telephone devices
FR715690A (en) Device for the automatic lighting of swinging barriers
FR751001A (en) Optical device for lighting devices
FR733882A (en) Support device for telephone receivers
FR794792A (en) Lighting device
FR753733A (en) Device for automatic loading of cinematographic devices
FR728850A (en) Lighting device for microscopes
FR779608A (en) Lighting device for microscopes
FR775225A (en) Device for lighting elongated diffusing surfaces
FR732319A (en) Automatic starting device
FR798534A (en) Suspension device for lighting devices
FR846076A (en) Device for automatic selection of currencies
FR663409A (en) Device for automatic ignition of electric lighting devices
FR697925A (en) Suspension device for lighting devices
FR805580A (en) Lighting device for projection devices
FR800968A (en) Device for adjusting installations for stage lighting
FR732071A (en) Device for lighting discs sending calls for automatic telephony
FR748564A (en) Device for the automatic disinfection of telephone transmitters and headphones
FR630250A (en) Suspension device for lighting devices
FR755115A (en) Automatic replacement device for gas lighting devices
FR835991A (en) Lighting device for microscopes
FR713666A (en) Signaling device for automatic telephone installation
FR763629A (en) Device for lighting the dials of telecommunication receivers
FR728677A (en) Device for automatic lubrication of compressors
FR726689A (en) Automatic lighting device for capacitor drums for radio stations