US1642603A - Reenforced mine prop - Google Patents

Reenforced mine prop Download PDF

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Publication number
US1642603A
US1642603A US113540A US11354026A US1642603A US 1642603 A US1642603 A US 1642603A US 113540 A US113540 A US 113540A US 11354026 A US11354026 A US 11354026A US 1642603 A US1642603 A US 1642603A
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United States
Prior art keywords
prop
reenforced
mine prop
mine
pipe
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Expired - Lifetime
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US113540A
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Martin J Conway
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    • 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

Definitions

  • My invention relates to a mine prop, particularly to a metal mine prop having a reenforcingA core or interior of Wood.
  • the general object of my invention is to provide a mine prop possessing increased strength over a Wooden prop of equal cross sectional area.
  • FIG. 1 is a longitudinal sectional view of a mine prop embodying my invention
  • FIG. 2 is a cross section on the line 2-2, Figure 1.
  • a length of pipe 10 is provided of the desired diameter according to the final dimensions required in the particular prop.
  • the prop is completed by means of two turned hard-Wood end plugs 12 having tenons 13 or inner ends of reduced ⁇ 30 diameter having a driving lit in the ends of the pipe 10.
  • a shoulder 14 on each plug is poduced at the base of thereduced inner end 192e. .serial No. 113,540.
  • the length of the tenonsor reduced inner ends 13 is such that the plugs complete with the central core 11 a solid reenforcement for the complete length of the pipe 10.
  • the pipe 10 is inpractice made of steel 4o and constitutes a casing for the major portion of the length of the prop and with the reenforcement provided by the core 11 and end plugs as described, strength is obtained materially beyond a prop made of Wood as i demonstrated by actual trial. Y
  • a mine prop having a metal casing, a central hard-Wood core in said casing and terminating short of the ends thereof, and plugs having tenons, said tenons having a driving fit in the ends' lof said casing and extending inward to the ends of said core.

Description

M. J. CONWAY y RBENFORCEDMINE PROP` Filed June s.'V 1926 WITNESSES TN n EWG, MJU
ATTORNEYS Patented` Sept. 13, 1927.
uNrrlezDv STATES MARTIN J. CONWAY, OF STUBENVILLE, OHIO.
REENFORCED .MINE PROP.
Application led June 3,
My invention relates to a mine prop, particularly to a metal mine prop having a reenforcingA core or interior of Wood.
The general object of my invention is to provide a mine prop possessing increased strength over a Wooden prop of equal cross sectional area.
The distinguishing features and advantages of my improved mine prop Will clearly appear as the description proceeds.
y Reference is to be had to the accompanying drawingsforming a part of this specification, it being understood that the ydrawings are merely illustrative of one example ofthe invention.
Figure 1 is a longitudinal sectional view of a mine prop embodying my invention Y Figure 2 is a cross section on the line 2-2, Figure 1. Y In carrying out my invention in accordance With the illustrated example, a length of pipe 10 is provided of the desired diameter according to the final dimensions required in the particular prop. Within the pipe 10 is a central turned hard-Wood core 11 terminating at its ends short of the ends of the pipe 10. The prop is completed by means of two turned hard-Wood end plugs 12 having tenons 13 or inner ends of reduced `30 diameter having a driving lit in the ends of the pipe 10. A shoulder 14 on each plug is poduced at the base of thereduced inner end 192e. .serial No. 113,540.
or tenon 13 sovthat the outer portion of larger diameter abuts at said shoulders against the ends of the pipe 10. The length of the tenonsor reduced inner ends 13 is such that the plugs complete with the central core 11 a solid reenforcement for the complete length of the pipe 10.
The pipe 10 is inpractice made of steel 4o and constitutes a casing for the major portion of the length of the prop and with the reenforcement provided by the core 11 and end plugs as described, strength is obtained materially beyond a prop made of Wood as i demonstrated by actual trial. Y
I Would state furthermore that While the illustrated example constitutes a practical embodiment of my invention,` I do not limit myself strictly to the exact details herein illustrated, since, manifestly, the same can loe considerably varied Without departure from the spirit of the invention as defined in the appended claim.
Having thus described my invention, I claim:
As an article of manufacture, a mine prop having a metal casing, a central hard-Wood core in said casing and terminating short of the ends thereof, and plugs having tenons, said tenons having a driving fit in the ends' lof said casing and extending inward to the ends of said core.
MARTIN J. CONWAY.
US113540A 1926-06-03 1926-06-03 Reenforced mine prop Expired - Lifetime US1642603A (en)

Priority Applications (1)

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US113540A US1642603A (en) 1926-06-03 1926-06-03 Reenforced mine prop

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US113540A US1642603A (en) 1926-06-03 1926-06-03 Reenforced mine prop

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130770A2 (en) * 1983-06-24 1985-01-09 Bestobell South Africa Limited Collapsible elongate mine support
EP0142280A2 (en) * 1983-10-14 1985-05-22 Bestobell South Africa Limited Elongate mine support
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
US4535496A (en) * 1983-11-08 1985-08-20 Parker Dennis D Water bed bar

Cited By (7)

* 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
EP0130770A2 (en) * 1983-06-24 1985-01-09 Bestobell South Africa Limited Collapsible elongate mine support
EP0130770A3 (en) * 1983-06-24 1986-05-14 Bestobell South Africa Limited Collapsible elongate mine support
EP0142280A2 (en) * 1983-10-14 1985-05-22 Bestobell South Africa Limited Elongate mine support
EP0142280A3 (en) * 1983-10-14 1986-05-21 Bestobell South Africa Limited Elongate mine support
US4535496A (en) * 1983-11-08 1985-08-20 Parker Dennis D Water bed bar

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