GB814184A - Improvements relating to adjustable supports or props - Google Patents
Improvements relating to adjustable supports or propsInfo
- Publication number
- GB814184A GB814184A GB1494756A GB1494756A GB814184A GB 814184 A GB814184 A GB 814184A GB 1494756 A GB1494756 A GB 1494756A GB 1494756 A GB1494756 A GB 1494756A GB 814184 A GB814184 A GB 814184A
- Authority
- GB
- United Kingdom
- Prior art keywords
- prop
- levers
- telescopic
- teeth
- pulleys
- 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
- 239000002184 metal Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000009416 shuttering Methods 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G25/00—Shores or struts; Chocks
- E04G25/04—Shores or struts; Chocks telescopic
- E04G25/08—Shores or struts; Chocks telescopic with parts held relatively to each other by friction or gripping
-
- 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
- E21D15/58—Devices for setting props or chocks
- E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Prostheses (AREA)
Abstract
814,184. Telescopic props. HAHN, A. May 14, 1956, No. 14947/56. Addition to 737,218. Class 20(2) An adjustable telescopic support or prop for use as a mine prop or for supporting shuttering, scaffolding, canal linings or the like, comprises an inner cylindrical telescopic part 4 and an outer telescopic part 18 carrying a casing 1 formed with inclined slots 19 which receive axles 14a on which are eccentrically mounted supporting and lifting pulleys 14 the profiles of which are adapted to the cylindrical shape of the inner telescopic part 4, the pulleys 14 being rotatable by means of cranks 15 to cause the inner part 4 to be lifted relatively to the outer part 18. The surface of the pulleys 14 are preferably provided with teeth. A reduction gear 16 may be provided between the crank 15 and the axle 14a of the lifting pulley 14 on one side. Two locking levers 3 are mounted eccentrically on axles 9 rotatable in bearings in the casing 1, each locking lever being provided with a gripping face comprising, as seen in side elevation, a curved portion 5 merging into a straight portion 6, and shaped as seen in plan to conform to the cylindrical surface of the inner prop part 4. The levers 3 resist any tendency of the inner prop part 4 to move back into the outer prop part 18 and as the load on the prop increases their curved portions 5 roll against the prop part 4 until their straight portions 6 engage the part 4. The portions 5, 6 are provided with teeth and the portion 6 may be given a friction covering of hard metal as by filling the gaps between the teeth with such hard metals. The axles 14a and the levers 3 may be acted upon by springs 17, 2 respectively. The levers 3 are maintained in supporting relationship with the inner prop part 4 by means of levers 10 which rest upon a rotatable shaft 12. To release the prop, the shaft 12 is turned by means of a lever 13 so that a cut-away portion on the shaft 12 permits one or other of the levers 10 to be deflected downwardly, thereby moving the corresponding lever 3 out of supporting relationship with the prop part 4.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB814184A true GB814184A (en) | 1959-06-03 |
Family
ID=1731136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1494756A Expired GB814184A (en) | 1956-05-14 | Improvements relating to adjustable supports or props |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB814184A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1258572B (en) * | 1966-12-05 | 1968-01-11 | Alexander Hahn | Lifting device designed as a jack |
| WO2023191637A1 (en) * | 2022-04-01 | 2023-10-05 | Viking Arm AS | Locking device, system and tool |
-
1956
- 1956-05-14 GB GB1494756A patent/GB814184A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1258572B (en) * | 1966-12-05 | 1968-01-11 | Alexander Hahn | Lifting device designed as a jack |
| WO2023191637A1 (en) * | 2022-04-01 | 2023-10-05 | Viking Arm AS | Locking device, system and tool |
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