GB1440581A - Indicating systems for cranes - Google Patents
Indicating systems for cranesInfo
- Publication number
- GB1440581A GB1440581A GB3526972A GB3526972A GB1440581A GB 1440581 A GB1440581 A GB 1440581A GB 3526972 A GB3526972 A GB 3526972A GB 3526972 A GB3526972 A GB 3526972A GB 1440581 A GB1440581 A GB 1440581A
- Authority
- GB
- United Kingdom
- Prior art keywords
- boom
- load
- signal
- generating means
- signal generating
- 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
- B66C23/905—Devices for indicating or limiting lifting moment electrical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
1440581 Crane safe load indicators B & A ENG CO Ltd 2 July 1973 [27 July 1972] 5269/72 Heading B8B [Also in Division G1] A safe load system for a crane or other lifting device having an extensible boom 1 comprises a first electrical signal generating means in the form of a strain gauge load transducer 4 providing a signal representative of the load on the crane, second electrical signal generating means in the form of a boom angle sensor and load low friction generator 7 including potentiometers 13a, 13b, 13c having respectively applied there to voltages representing maximum safe loads for respective boom lengths of 20ft., 30 ft. and 40ft. and cam 12 and follower mechanisms responsive to the angle of inclination of the boom and which control the potentiometer outputs to provide a signal which is a function of boom angle and boom length, third signal generating means, producing a signal representative of boom length, a load low function interpolator 8 combining the signals produced by the second and third signal generating means and producing a signal representative of safe load and a comparator 6 comparing the safe load representing signal and the signal from the first signal generating means. A visible and/or audible warning may be provided.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3526972A GB1440581A (en) | 1972-07-27 | 1972-07-27 | Indicating systems for cranes |
DE19732337707 DE2337707A1 (en) | 1972-07-27 | 1973-07-25 | CAPACITY INDICATOR SYSTEM |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3526972A GB1440581A (en) | 1972-07-27 | 1972-07-27 | Indicating systems for cranes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1440581A true GB1440581A (en) | 1976-06-23 |
Family
ID=10375819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3526972A Expired GB1440581A (en) | 1972-07-27 | 1972-07-27 | Indicating systems for cranes |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2337707A1 (en) |
GB (1) | GB1440581A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098410A (en) * | 1976-02-25 | 1978-07-04 | Weighload Limited | Safe load indicator for jib cranes |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2282399A1 (en) * | 1974-08-20 | 1976-03-19 | Strawson Hydraulics Ltd | SAFETY DEVICE FOR CRANES |
FR2401407A1 (en) * | 1977-06-16 | 1979-03-23 | Preux Roger | Electronic control of crane motor output - uses pressure transducer in hydraulic ram to monitor crane load |
-
1972
- 1972-07-27 GB GB3526972A patent/GB1440581A/en not_active Expired
-
1973
- 1973-07-25 DE DE19732337707 patent/DE2337707A1/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098410A (en) * | 1976-02-25 | 1978-07-04 | Weighload Limited | Safe load indicator for jib cranes |
Also Published As
Publication number | Publication date |
---|---|
DE2337707A1 (en) | 1974-02-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |