GB312425A - Improvements in luffing cranes - Google Patents
Improvements in luffing cranesInfo
- Publication number
- GB312425A GB312425A GB795728A GB795728A GB312425A GB 312425 A GB312425 A GB 312425A GB 795728 A GB795728 A GB 795728A GB 795728 A GB795728 A GB 795728A GB 312425 A GB312425 A GB 312425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rope
- sheaves
- round
- lever
- jib head
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
- B66C23/08—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
- B66C23/10—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
- B66C2700/0307—Cranes in which it is essential that the load is moving horizontally during the luffing movement of the arm or jib
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
312,425. Jardine, J. March 15, 1928. Addition to 267,825. Jib cranes. - The form of level-luffing crane according to the parent Specification in which the load block is suspended in a bight of the hoisting rope, is modified by leading one branch of the rope round sheaves at the jib head and on the frame, instead of sheaves at the jib head and on the compensating lever. The free end of the rope is anchored to the lever or passed around a sheave therein and anchored to a fixed point. As shown in Fig. 1, the hoisting rope F passes from the drum E over sheaves H on the frame A and K on the jib head, round the load block L and then as many times as required round sheaves I, M at the jib head and J on the frame and is finally anchored to the compensating lever C at c<2>. The lever is connected at c<1> by a rod, rope or chain D to the jib head. In a modification, Fig. 2. (not shown) the rope passes from the drum round sheaves such as J, M, then round the load block and finally to the compensating lever.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB795728A GB312425A (en) | 1928-03-15 | 1928-03-15 | Improvements in luffing cranes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB795728A GB312425A (en) | 1928-03-15 | 1928-03-15 | Improvements in luffing cranes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB312425A true GB312425A (en) | 1929-05-30 |
Family
ID=9843013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB795728A Expired GB312425A (en) | 1928-03-15 | 1928-03-15 | Improvements in luffing cranes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB312425A (en) |
-
1928
- 1928-03-15 GB GB795728A patent/GB312425A/en not_active Expired
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