GB390027A - A releasing device for attachment to existing pit props of section metal, tubes or timber - Google Patents

A releasing device for attachment to existing pit props of section metal, tubes or timber

Info

Publication number
GB390027A
GB390027A GB1700132A GB1700132A GB390027A GB 390027 A GB390027 A GB 390027A GB 1700132 A GB1700132 A GB 1700132A GB 1700132 A GB1700132 A GB 1700132A GB 390027 A GB390027 A GB 390027A
Authority
GB
United Kingdom
Prior art keywords
prop
fitting
extensions
timber
tubes
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
GB1700132A
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.)
FERDINAND RICHARDS
Original Assignee
FERDINAND RICHARDS
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 FERDINAND RICHARDS filed Critical FERDINAND RICHARDS
Priority to GB1700132A priority Critical patent/GB390027A/en
Publication of GB390027A publication Critical patent/GB390027A/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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • 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
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props
    • E21D15/526—Extensible units located above or below standard props for step-by-step extension of the prop
    • 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
    • E21D15/60—Devices for withdrawing props or chocks

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)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

390,027. Mine props. RICHARDS, F., 14, Brynheulog Street, Port Talbot, Glamorgan. June 16, 1932, No. 17001. [Class 20 (ii).] A head or foot fitting 1 for pit props is arranged so that it is held normally in alignment with the prop by means of a stop, removal of which allows tilting between the prop and fitting. The fitting 1 is provided with a groove 2, against which abuts the wedgeshaped end of the prop, and also with extensions 4 which embrace the prop, pin-stops 5 in these extensions being used to retain the fitting and prop in alignment. Removal of one of the stops 5 will allow relative rotation and disengagement of the prop and and the fitting. A hinged stop 6, Fig. 6, may be used in place of a pin stop 5. The extensions may comprise rods 23 provided with eyes 24, 25, Fig. 12, and the fitting may be formed as a socket to receive a wooden plug.
GB1700132A 1932-06-16 1932-06-16 A releasing device for attachment to existing pit props of section metal, tubes or timber Expired GB390027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1700132A GB390027A (en) 1932-06-16 1932-06-16 A releasing device for attachment to existing pit props of section metal, tubes or timber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1700132A GB390027A (en) 1932-06-16 1932-06-16 A releasing device for attachment to existing pit props of section metal, tubes or timber

Publications (1)

Publication Number Publication Date
GB390027A true GB390027A (en) 1933-03-30

Family

ID=10087454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1700132A Expired GB390027A (en) 1932-06-16 1932-06-16 A releasing device for attachment to existing pit props of section metal, tubes or timber

Country Status (1)

Country Link
GB (1) GB390027A (en)

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