GB351377A - Improvements relating to metallic pit props - Google Patents

Improvements relating to metallic pit props

Info

Publication number
GB351377A
GB351377A GB3523130A GB3523130A GB351377A GB 351377 A GB351377 A GB 351377A GB 3523130 A GB3523130 A GB 3523130A GB 3523130 A GB3523130 A GB 3523130A GB 351377 A GB351377 A GB 351377A
Authority
GB
United Kingdom
Prior art keywords
stop
improvements relating
class
recess
pillar
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
GB3523130A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3523130A priority Critical patent/GB351377A/en
Publication of GB351377A publication Critical patent/GB351377A/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
    • E21D15/02—Non-telescopic props
    • E21D15/06—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability
    • E21D15/10—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability with dog-clutch or pin-and-hole connection

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)
  • Joining Of Building Structures In Genera (AREA)

Abstract

351,377. Mine props. WILSON, J., North View, Bonnybridge, Stirlingshire. Nov. 22, 1930, No. 35231. Addition to 292,036, [Class 20 (ii), Buildings and structures, Miscellaneous accessories &c.]. [Class 20 (ii).] An improvement in the prop of the parent Specification comprises the use of a stop to prevent complete removal of the pillar from the tubular socket. The stop consists of a removable screw 7 in the pillar adapted to engage a recess 9 in the upper part of the bayonet slot in the tubular socket, the recess being so positioned that the stop will clear the edge 13 of the slot to allow complete collapse of the parts.
GB3523130A 1930-11-22 1930-11-22 Improvements relating to metallic pit props Expired GB351377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3523130A GB351377A (en) 1930-11-22 1930-11-22 Improvements relating to metallic pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3523130A GB351377A (en) 1930-11-22 1930-11-22 Improvements relating to metallic pit props

Publications (1)

Publication Number Publication Date
GB351377A true GB351377A (en) 1931-06-25

Family

ID=10375350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3523130A Expired GB351377A (en) 1930-11-22 1930-11-22 Improvements relating to metallic pit props

Country Status (1)

Country Link
GB (1) GB351377A (en)

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