GB1476525A - Crane load warning system - Google Patents

Crane load warning system

Info

Publication number
GB1476525A
GB1476525A GB4164874A GB4164874A GB1476525A GB 1476525 A GB1476525 A GB 1476525A GB 4164874 A GB4164874 A GB 4164874A GB 4164874 A GB4164874 A GB 4164874A GB 1476525 A GB1476525 A GB 1476525A
Authority
GB
United Kingdom
Prior art keywords
load
switch
input
warning
cell
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
Application number
GB4164874A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Corp
Original Assignee
Eaton Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eaton Corp filed Critical Eaton Corp
Publication of GB1476525A publication Critical patent/GB1476525A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C15/00—Safety gear
    • B66C15/06—Arrangements or use of warning devices
    • B66C15/065—Arrangements or use of warning devices electrical

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

1476525 Load-monitoring device EATON CORP 25 Sept 1974 [23 Oct 1973] 41648/74 Heading G1N [ Also in Division B8] A load monitoring and warning device for a crane includes a load cell 10 in one cable of a main lifting system, an alternative cell 11 in an auxiliary system can be selected by switch 12. The output from the load cell is compared with a reference signal so that when the load on the cable falls to a set proportion of the static load an output signal operates alarms such as a warning light 34 or an audible alarm 36. Thus warning is given if a load catches on an obstacle while being lowered. The reference signal is set by a digital switch 37 and is supplied to a switch 23 at input 24 and in a first position of the switch 23 is connected to input 28 of a differential amplifier 31, the signal from the load cell being connected to input 27. The warning device will then be operated if the load exceeds a value corresponding to the setting of switch 37. This position of the switch is used in lifting after which the reference signal is adjusted by operation of switch 37 to equal the actual load signal on lead 29. Switch 23 is then moved to connect lead 26 to input 27 and lead 29 to input 28. The alarm will then be energized if the load falls below the static load by a fraction determined by resistors R8, R9. The output of the load cell may also be used to provide a continuous display of the load on an indicator 19, and may be fed to another differential amplifier 22 which gives a warning if the load exceeds the maximum allowable value.
GB4164874A 1973-10-23 1974-09-25 Crane load warning system Expired GB1476525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408832A US3913081A (en) 1973-10-23 1973-10-23 Crane load warning system

Publications (1)

Publication Number Publication Date
GB1476525A true GB1476525A (en) 1977-06-16

Family

ID=23617961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4164874A Expired GB1476525A (en) 1973-10-23 1974-09-25 Crane load warning system

Country Status (8)

Country Link
US (1) US3913081A (en)
JP (1) JPS5078049A (en)
AU (1) AU7425574A (en)
CA (1) CA1015702A (en)
DE (1) DE2450135A1 (en)
FR (1) FR2248226B1 (en)
GB (1) GB1476525A (en)
IT (1) IT1022663B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642773A (en) * 2012-04-09 2012-08-22 上海海事大学 Swinging angle detection device suitable for twin-hanger bridge crane

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068773A (en) * 1975-04-03 1978-01-17 Allis-Chalmers Corporation Lift vehicle with fail-safe overload protective system
US3993166A (en) * 1975-04-29 1976-11-23 Bofors America, Inc. Overload signalling system for fork lift trucks and the like
JPS52147850A (en) * 1976-06-01 1977-12-08 Hitachi Constr Mach Co Ltd Overload preventive device for travelling crane
US4487741A (en) * 1981-11-30 1984-12-11 Westinghouse Electric Corp. Transfer of fuel assemblies
US4894849A (en) * 1988-09-30 1990-01-16 Westinghouse Electric Corp. Apparatus and method for transferring nuclear reactor fuel assemblies
AU753378B2 (en) * 1997-07-23 2002-10-17 International Stevedoring Operations Limited Cargo transfer safety system
JP4320931B2 (en) * 2000-03-27 2009-08-26 コベルコクレーン株式会社 Crane overload prevention method and overload prevention device
EP1328913A4 (en) * 2000-09-27 2004-09-22 Oceaneering Int Inc Method and system for high speed deployment monitoring
US6686839B2 (en) * 2001-04-04 2004-02-03 International Business Machines Corporation Method and system for noise notification
JP5204877B2 (en) * 2011-08-04 2013-06-05 東海旅客鉄道株式会社 vehicle
RU2571893C1 (en) * 2014-06-24 2015-12-27 Общество с ограниченной ответственностью "Научно-производственный центр "Судовые электротехнические системы" (ООО "НПЦ "СЭС") Climbing jib crane load limiter
US10994970B2 (en) 2019-07-29 2021-05-04 Jim D. Wiethorn Crane risk logic apparatus and system and method for use of same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631537A (en) * 1970-01-26 1971-12-28 Harnischfeger Corp Calibration circuit for boom crane load safety device
US3710368A (en) * 1971-02-25 1973-01-09 Eaton Corp Boom angle indication system
US3740741A (en) * 1971-05-26 1973-06-19 Eaton Corp Alarm set point control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642773A (en) * 2012-04-09 2012-08-22 上海海事大学 Swinging angle detection device suitable for twin-hanger bridge crane

Also Published As

Publication number Publication date
CA1015702A (en) 1977-08-16
AU7425574A (en) 1976-04-15
FR2248226A1 (en) 1975-05-16
JPS5078049A (en) 1975-06-25
US3913081A (en) 1975-10-14
DE2450135A1 (en) 1975-04-24
FR2248226B1 (en) 1978-11-24
IT1022663B (en) 1978-04-20

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed