GB375386A - Improvements in safe load indicators for cranes and the like - Google Patents
Improvements in safe load indicators for cranes and the likeInfo
- Publication number
- GB375386A GB375386A GB895531A GB895531A GB375386A GB 375386 A GB375386 A GB 375386A GB 895531 A GB895531 A GB 895531A GB 895531 A GB895531 A GB 895531A GB 375386 A GB375386 A GB 375386A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheave
- spring
- rod
- bight
- quadrant
- 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
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
375,386. Weighing-apparatus fitted to cranes. WALLS, A. G., 295, Broadstone Road, Heaton Chapel, Stockport. March 24, 1931, No. 8955. [Class 143.] A weigh-crane provided with a device which gives a visible or audible indication, or both, of the approach to the safe load comprises a sheave in a bight of the hoisting rope mounted in a sliding or swinging member which moves substantially in a straight line against the resistance of a spring. As applied to a jib crane, the safe load at any angle of the jib is shown on a uniform scale of weight and actual load on the crane is shown on the same scale. As shown in Fig. I, a sheave 7 in a bight of the hoisting rope is carried on a rod 5 sliding in bearings in a housing 2 on the jib against the resistance of a spring 14. Additional springs may be arranged as at 16, or concentric with the spring 14 or alongside of it, and the sheave 7 may be in a bight which bears only a part of the load. The springs may be coated, e.g. with chromium to resist rust. The rod 5 carries a bracket 19 connected by a wire, or a band 21 or the like, to a drum 22 which carries the weight indicator 24, 24a moving over a scale 26, Fig. II. In a modification, Fig. VI, the sheave 7 is mounted in an arm 43 pivoted at a point P which is beyond the radius of the sheave. A quadrant 44 on the arm 43 is connected by a flexible member to a small quadrant 45 on a lever 46 which is restrained by a spring 47 and is connected by a quadrant 48 and flexible link to the weight indicator 24. In another modification, Fig. VIII (not shown), a rod such as 5 restrained by a light spring 14 carries a rack connected through spur gearing with a rack on the frame of the sheave 7, the travel of the rod 5 being greater than that of the sheave 7.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB895531A GB375386A (en) | 1931-03-24 | 1931-03-24 | Improvements in safe load indicators for cranes and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB895531A GB375386A (en) | 1931-03-24 | 1931-03-24 | Improvements in safe load indicators for cranes and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB375386A true GB375386A (en) | 1932-06-24 |
Family
ID=9862533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB895531A Expired GB375386A (en) | 1931-03-24 | 1931-03-24 | Improvements in safe load indicators for cranes and the like |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB375386A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278925A (en) * | 1964-03-09 | 1966-10-11 | Weighload Ltd | Cranes |
-
1931
- 1931-03-24 GB GB895531A patent/GB375386A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278925A (en) * | 1964-03-09 | 1966-10-11 | Weighload Ltd | Cranes |
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