GB1347580A - Operating radius indicator for extensible jib cranes and the like - Google Patents
Operating radius indicator for extensible jib cranes and the likeInfo
- Publication number
- GB1347580A GB1347580A GB1347580DA GB1347580A GB 1347580 A GB1347580 A GB 1347580A GB 1347580D A GB1347580D A GB 1347580DA GB 1347580 A GB1347580 A GB 1347580A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jib
- follower
- scale
- attached
- operating radius
- 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
Abstract
1347580 Crane operating radius indicator B & A ENGINEERING CO Ltd 30 June 1972 [2 July 1971] 31241/71 Heading B8B A crane operating radius indicator is shown mounted on a support formed by a base-plate 4 on an extensible crane jib 20. A follower 8 having a pendulum 10 attached slides in a slot 9 parallel to the jib axis. The follower 8 also moves in a slot 13 in a lever 2 attached to a sprocket 7 rotatably mounted on a shaft 3 connected to the base-plate 4. A spring-loaded cable drum 1 has a cable 14 passing to the jib head and drives the sprocket 7 via a sprocket 5 on the drum 1 and a chain 6. A second pendulum 15 is pivoted on a pin 12 and carries a scale 11 maintained horizontal irrespective of the jib angle. The lever 2 positions the follower 8 in response to changes in the jib length so that the distance between the pivot 12 and the follower 8 is proportional to the jib length. Thus the pendulum 10 provides a vertical line giving a reading on the scale 11 directly proportional to the operating radius. In a modification, Fig. 2 (not shown), the position of the follower 8 is determined by a screw-threaded rod (21) rotated in response to changes in the jib length. The scale 11 may be arranged at a constant angle (instead of being horizontal) and may have attached to it a jib inclination scale co-operating with a pointer (17) attached to the jib 20.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3124171 | 1972-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1347580A true GB1347580A (en) | 1974-02-27 |
Family
ID=10320169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1347580D Expired GB1347580A (en) | 1972-06-30 | 1972-06-30 | Operating radius indicator for extensible jib cranes and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1347580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211332A (en) * | 1978-04-03 | 1980-07-08 | R O Corporation | Color coded boom and chart system |
-
1972
- 1972-06-30 GB GB1347580D patent/GB1347580A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4211332A (en) * | 1978-04-03 | 1980-07-08 | R O Corporation | Color coded boom and chart system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |