NL174889B - ELECTRIC HIGH VOLTAGE SWITCH WITH CLOSED GAS CIRCUIT. - Google Patents

ELECTRIC HIGH VOLTAGE SWITCH WITH CLOSED GAS CIRCUIT.

Info

Publication number
NL174889B
NL174889B NLAANVRAGE7404111,A NL174889DA NL174889B NL 174889 B NL174889 B NL 174889B NL 174889D A NL174889D A NL 174889DA NL 174889 B NL174889 B NL 174889B
Authority
NL
Netherlands
Prior art keywords
high voltage
gas circuit
voltage switch
closed gas
electric high
Prior art date
Application number
NLAANVRAGE7404111,A
Other languages
Dutch (nl)
Original Assignee
Siemens Ag
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.)
Publication of NL174889B publication Critical patent/NL174889B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Working Measures On Existing Buildindgs (AREA)
NLAANVRAGE7404111,A 1951-12-29 ELECTRIC HIGH VOLTAGE SWITCH WITH CLOSED GAS CIRCUIT. NL174889B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1951R0007973 DE919344C (en) 1951-12-29 1951-12-29 Articulated connection with two hinge points of caps for longwall construction, especially for the punch-free mining front

Publications (1)

Publication Number Publication Date
NL174889B true NL174889B (en)

Family

ID=7397773

Family Applications (2)

Application Number Title Priority Date Filing Date
NL86462D NL86462C (en) 1951-12-29
NLAANVRAGE7404111,A NL174889B (en) 1951-12-29 ELECTRIC HIGH VOLTAGE SWITCH WITH CLOSED GAS CIRCUIT.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL86462D NL86462C (en) 1951-12-29

Country Status (5)

Country Link
BE (1) BE516589A (en)
DE (1) DE919344C (en)
FR (1) FR1069747A (en)
GB (1) GB729171A (en)
NL (2) NL174889B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1186819B (en) * 1955-02-04 1965-02-11 Aloys Vanwersch Articulated connection of caps for longwall mining in underground operations
DE1250935B (en) * 1960-12-20

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE819233C (en) * 1948-10-02 1951-10-31 Gelsenkirchener Bergwerks Akti Articulated connection, especially for connecting two steel caps in mining operations

Also Published As

Publication number Publication date
NL86462C (en)
BE516589A (en)
FR1069747A (en) 1954-07-12
GB729171A (en) 1955-05-04
DE919344C (en) 1954-10-21

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