GB221421A - Props for mines - Google Patents
Props for minesInfo
- Publication number
- GB221421A GB221421A GB350424A GB350424A GB221421A GB 221421 A GB221421 A GB 221421A GB 350424 A GB350424 A GB 350424A GB 350424 A GB350424 A GB 350424A GB 221421 A GB221421 A GB 221421A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cap
- piece
- irons
- strutting
- bearer
- 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
Links
- 235000000396 iron Nutrition 0.000 abstract 2
- 238000007789 sealing Methods 0.000 abstract 1
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
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)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Buffer Packaging (AREA)
- Packaging Frangible Articles (AREA)
Abstract
221,421. Thielmann, P., and Goswin & Co., Kom.-Ges. Feb. 11, 1924. No Patent granted (Sealing fee not paid). Mine props of the type having a cap-piece filled with crushable material and slots in the cap-piece to allow escape thereof, have means whereby the height of the bearer may be adjusted. The cap-piece e is provided with a hemispherical top surface against which contact inclined portions of strutting irons, which are slotted at r to receive projections k on the cap-piece, and which have inclined upper portions n to receive the bearers c. The height of the bearer is adjusted by varying the distance apart of the strutting irons by means of bolts u.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB350424A GB221421A (en) | 1924-02-11 | 1924-02-11 | Props for mines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB350424A GB221421A (en) | 1924-02-11 | 1924-02-11 | Props for mines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB221421A true GB221421A (en) | 1924-09-11 |
Family
ID=9759576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB350424A Expired GB221421A (en) | 1924-02-11 | 1924-02-11 | Props for mines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB221421A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2450345A (en) * | 1944-03-06 | 1948-09-28 | Kervin William Martin | Protective cap for wood posts, poles, and the like |
DE1030281B (en) * | 1954-12-15 | 1958-05-22 | Dowty Mining Equipment Ltd | Pit punch with pivotably mounted end plate |
DE971164C (en) * | 1944-02-04 | 1958-12-18 | F W Moll Soehne Maschinenfabri | Pit punch head |
US5826398A (en) * | 1996-05-22 | 1998-10-27 | Carnicle; Michael A. | Device and method for protecting from reinforcement bar injury |
US6073415A (en) * | 1996-05-22 | 2000-06-13 | Carnicle; Michael A. | Device and method for protecting from reinforcement bar injury |
-
1924
- 1924-02-11 GB GB350424A patent/GB221421A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE971164C (en) * | 1944-02-04 | 1958-12-18 | F W Moll Soehne Maschinenfabri | Pit punch head |
US2450345A (en) * | 1944-03-06 | 1948-09-28 | Kervin William Martin | Protective cap for wood posts, poles, and the like |
DE1030281B (en) * | 1954-12-15 | 1958-05-22 | Dowty Mining Equipment Ltd | Pit punch with pivotably mounted end plate |
US5826398A (en) * | 1996-05-22 | 1998-10-27 | Carnicle; Michael A. | Device and method for protecting from reinforcement bar injury |
US6073415A (en) * | 1996-05-22 | 2000-06-13 | Carnicle; Michael A. | Device and method for protecting from reinforcement bar injury |
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