FR807546A - Postes téléphoniques anti-déflagrants, par exemple pour mines grisouteuses - Google Patents

Postes téléphoniques anti-déflagrants, par exemple pour mines grisouteuses

Info

Publication number
FR807546A
FR807546A FR807546DA FR807546A FR 807546 A FR807546 A FR 807546A FR 807546D A FR807546D A FR 807546DA FR 807546 A FR807546 A FR 807546A
Authority
FR
France
Prior art keywords
explosion
telephone sets
gas mines
proof telephone
proof
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)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR807546A publication Critical patent/FR807546A/fr
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
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR807546D 1935-10-03 1935-10-03 Postes téléphoniques anti-déflagrants, par exemple pour mines grisouteuses Expired FR807546A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR807546T 1935-10-03

Publications (1)

Publication Number Publication Date
FR807546A true FR807546A (fr) 1937-01-14

Family

ID=9252502

Family Applications (1)

Application Number Title Priority Date Filing Date
FR807546D Expired FR807546A (fr) 1935-10-03 1935-10-03 Postes téléphoniques anti-déflagrants, par exemple pour mines grisouteuses

Country Status (1)

Country Link
FR (1) FR807546A (fr)

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