GB522041A - Improvements in or relating to lifting devices - Google Patents
Improvements in or relating to lifting devicesInfo
- Publication number
- GB522041A GB522041A GB35302/38A GB3530238A GB522041A GB 522041 A GB522041 A GB 522041A GB 35302/38 A GB35302/38 A GB 35302/38A GB 3530238 A GB3530238 A GB 3530238A GB 522041 A GB522041 A GB 522041A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- base
- nut
- pivoted
- inner end
- 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
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
-
- 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
- B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
522,041. Load-handling apparatus. ALLARD, P. J. M. T. Dec. 3, 1938, No. 35302. Convention date, Dec. 17, 1937. [Class 78 (iii). Lifting apparatus constructed with a jiblike arm mounted on a supporting base by a link is actuated by screw and nut mechanism at the inner end of the arm so that the free end moves in a substantially vertical path. The arm 5 is pivoted on a link 22 pivoted to the base 1 and the inner end of the arm is bifurcated to support a nut 26,engaging a screw 27 which can be rotated through gears 36, 37 from a motor. The nut travels along an inclined slide on the base and rollers 32. 33 mounted on pins on the nut travel in fixed tracks on the base. The base may be mounted on wheels or endless tracks. The Specification, as open to inspection under Sect. 91, describes an arrangement in which the arm is supported from the base by two links at the inner end of the arm and at an intermediate point respectively, and the cam is raised and lowered by a cable passing round pulleys on the base and on the pivoted end of the arm and leading to a winch. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR522041X | 1937-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB522041A true GB522041A (en) | 1940-06-06 |
Family
ID=8917617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35302/38A Expired GB522041A (en) | 1937-12-17 | 1938-12-03 | Improvements in or relating to lifting devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB522041A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272928A (en) * | 1962-03-07 | 1966-09-13 | Electricite De France | Apparatus for electrical and fluid connection |
-
1938
- 1938-12-03 GB GB35302/38A patent/GB522041A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272928A (en) * | 1962-03-07 | 1966-09-13 | Electricite De France | Apparatus for electrical and fluid connection |
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