FR550538A - Indicator for mines - Google Patents

Indicator for mines

Info

Publication number
FR550538A
FR550538A FR550538DA FR550538A FR 550538 A FR550538 A FR 550538A FR 550538D A FR550538D A FR 550538DA FR 550538 A FR550538 A FR 550538A
Authority
FR
France
Prior art keywords
mines
indicator
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
David Evans
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 FR550538A publication Critical patent/FR550538A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B3/00—Applications of devices for indicating or signalling operating conditions of elevators
    • B66B3/02—Position or depth indicators
    • B66B3/026—Mechanical devices that can be illuminated

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR550538D 1922-04-22 1922-04-22 Indicator for mines Expired FR550538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR550538T 1922-04-22

Publications (1)

Publication Number Publication Date
FR550538A true FR550538A (en) 1923-03-12

Family

ID=8936266

Family Applications (1)

Application Number Title Priority Date Filing Date
FR550538D Expired FR550538A (en) 1922-04-22 1922-04-22 Indicator for mines

Country Status (1)

Country Link
FR (1) FR550538A (en)

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