GB759620A - Apparatus for testing pit props - Google Patents

Apparatus for testing pit props

Info

Publication number
GB759620A
GB759620A GB27036/53A GB2703653A GB759620A GB 759620 A GB759620 A GB 759620A GB 27036/53 A GB27036/53 A GB 27036/53A GB 2703653 A GB2703653 A GB 2703653A GB 759620 A GB759620 A GB 759620A
Authority
GB
United Kingdom
Prior art keywords
pit props
testing
testing pit
oct
props
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
GB27036/53A
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.)
Mannesmann Demag AG
Original Assignee
Demag 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.)
Filing date
Publication date
Application filed by Demag AG filed Critical Demag AG
Publication of GB759620A publication Critical patent/GB759620A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/46—Telescopic props with load-measuring devices; with alarm devices
    • E21D15/465—Telescopic props with load-measuring devices; with alarm devices with essential hydraulic or pneumatic details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

759,620. Testing pit props. DEMAG AKT.- GES. Oct. 2, 1953 [Oct. 24, 1952], No. 27036/53. Class 20(2). An apparatus for testing pit props comprises a frame having a cross-head 1 and a hydraulicallyoperated plunger 6 coupled by longitudinal members 2, and means 11 for measuring the length and compression of the prop in relation to the pressure applied as indicated by a pressure gauge. The whole may be mounted on skids or wheels.
GB27036/53A 1952-10-24 1953-10-02 Apparatus for testing pit props Expired GB759620A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE759620X 1952-10-24

Publications (1)

Publication Number Publication Date
GB759620A true GB759620A (en) 1956-10-24

Family

ID=6660535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27036/53A Expired GB759620A (en) 1952-10-24 1953-10-02 Apparatus for testing pit props

Country Status (1)

Country Link
GB (1) GB759620A (en)

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