GB185443A - Improvements in or connected with cranes or like goods raising and lowering apparatus - Google Patents
Improvements in or connected with cranes or like goods raising and lowering apparatusInfo
- Publication number
- GB185443A GB185443A GB956621A GB956621A GB185443A GB 185443 A GB185443 A GB 185443A GB 956621 A GB956621 A GB 956621A GB 956621 A GB956621 A GB 956621A GB 185443 A GB185443 A GB 185443A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jib
- pulley
- trolly
- link
- rope
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
185,443. Robertson, C. March 31, 1921. Jib cranes.-The head-sheave 6 moves up and down the jib during luffing, under the control of a lever 8 pivoted on the jib at 9 and connected to the crane frame by a link 11 and to the pulley trolly 5 by a link 10. A counterweight 12 for balancing the jib is suspended by a rope 13 attached to the pulley trolly 5 and passing over a pulley 15. In place of the rope 13 and pulley 15, a rod may be connected to the trolly 5 and anchored to a link, another rope or rod being taken to the counterweight. The load moves in an approximately horizontal path 20, 21 during luffing; the jib is balanced approximately in all intermediate positions, but at the maximum and minimum radii the jib is not balanced, so that the luffing-motor becomes overloaded, even when no load is on the crane hook.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB956621A GB185443A (en) | 1921-03-31 | 1921-03-31 | Improvements in or connected with cranes or like goods raising and lowering apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB956621A GB185443A (en) | 1921-03-31 | 1921-03-31 | Improvements in or connected with cranes or like goods raising and lowering apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB185443A true GB185443A (en) | 1922-08-31 |
Family
ID=9874452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB956621A Expired GB185443A (en) | 1921-03-31 | 1921-03-31 | Improvements in or connected with cranes or like goods raising and lowering apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB185443A (en) |
-
1921
- 1921-03-31 GB GB956621A patent/GB185443A/en not_active Expired
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