GB271198A - Improvements in and relating to cranes - Google Patents
Improvements in and relating to cranesInfo
- Publication number
- GB271198A GB271198A GB693926A GB693926A GB271198A GB 271198 A GB271198 A GB 271198A GB 693926 A GB693926 A GB 693926A GB 693926 A GB693926 A GB 693926A GB 271198 A GB271198 A GB 271198A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jib
- head
- luffing
- sheave
- sheaves
- 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
- B66C2700/0314—Cranes in which it is essential that the load is moving horizontally during the luffing movement of the arm or jib in combination with the movement of the counterweight
Abstract
271,198. Tuckett, F. S. March 12, 1926. Jib-cranes.-To ensure horizontal travel of the load in luffing the load rope p is passed directly from the jib-head to a guide-sheave i<1> on the end of luffing arm i connected with the jib head, and the sheave i<1> is constrained to move along a line i<1>, r determined so that each of the distances KL, KM, KN &c. bears the same proportion to the corresponding height FF<1>, GG<1>, HH<1> &c. by which the head-sheave rises in luffing from the mid-position C. In the arrangement shown, the distances KL &c. are each one-third of the heights FF<1> &c. and the load-rope is reeved round sheaves at i', i<2>, i<1> before passing to the hoisting drum r, the axes of the sheaves and drum being collinear. The jib is balanced by a weight s suspended on a rope attached to the pin or cross-head of the sheaves i, or to a sheave mounted on the pin. The luffing links X, Y may be operated by screw- and-nut mechanism.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB693926A GB271198A (en) | 1926-03-12 | 1926-03-12 | Improvements in and relating to cranes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB693926A GB271198A (en) | 1926-03-12 | 1926-03-12 | Improvements in and relating to cranes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB271198A true GB271198A (en) | 1927-05-26 |
Family
ID=9823591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB693926A Expired GB271198A (en) | 1926-03-12 | 1926-03-12 | Improvements in and relating to cranes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB271198A (en) |
-
1926
- 1926-03-12 GB GB693926A patent/GB271198A/en not_active Expired
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