GB118969A - Improvements in Pit Props. - Google Patents

Improvements in Pit Props.

Info

Publication number
GB118969A
GB118969A GB27118A GB27118A GB118969A GB 118969 A GB118969 A GB 118969A GB 27118 A GB27118 A GB 27118A GB 27118 A GB27118 A GB 27118A GB 118969 A GB118969 A GB 118969A
Authority
GB
United Kingdom
Prior art keywords
props
pit props
pit
fryar
bruising
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
GB27118A
Inventor
Mark Fryar
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 GB27118A priority Critical patent/GB118969A/en
Publication of GB118969A publication Critical patent/GB118969A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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

Abstract

118,969. Fryar, M. Jan. 5, 1918. Mine props. - The ends and particularly the lower ends of wooden pit props a r e weakened by boring in them longitudinal or transverse holes a or by hammering, rolling, or otherwise bruising the exterior thereof so as partially to destroy the cohesion of the wood fibres as shown in Fig. 9.
GB27118A 1918-01-05 1918-01-05 Improvements in Pit Props. Expired GB118969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB27118A GB118969A (en) 1918-01-05 1918-01-05 Improvements in Pit Props.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27118A GB118969A (en) 1918-01-05 1918-01-05 Improvements in Pit Props.

Publications (1)

Publication Number Publication Date
GB118969A true GB118969A (en) 1918-09-19

Family

ID=32669675

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27118A Expired GB118969A (en) 1918-01-05 1918-01-05 Improvements in Pit Props.

Country Status (1)

Country Link
GB (1) GB118969A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520980A (en) * 1979-11-02 1985-06-04 Mine Support Systems (Proprietary) Ltd. Elongate compression bearing member
US4534531A (en) * 1980-07-22 1985-08-13 Brown Allan H G Elongated prop for supporting a load
EP0160133A1 (en) * 1982-08-26 1985-11-06 Bestobell South Africa Limited Elongate mine prop
US4915339A (en) * 1982-08-06 1990-04-10 H L & H Timer Products (Proprietary) Limited Mine prop

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4520980A (en) * 1979-11-02 1985-06-04 Mine Support Systems (Proprietary) Ltd. Elongate compression bearing member
US4534531A (en) * 1980-07-22 1985-08-13 Brown Allan H G Elongated prop for supporting a load
US4915339A (en) * 1982-08-06 1990-04-10 H L & H Timer Products (Proprietary) Limited Mine prop
EP0160133A1 (en) * 1982-08-26 1985-11-06 Bestobell South Africa Limited Elongate mine prop

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