GB1358871A - Crane load indicator arrangement - Google Patents

Crane load indicator arrangement

Info

Publication number
GB1358871A
GB1358871A GB3002471A GB3002471A GB1358871A GB 1358871 A GB1358871 A GB 1358871A GB 3002471 A GB3002471 A GB 3002471A GB 3002471 A GB3002471 A GB 3002471A GB 1358871 A GB1358871 A GB 1358871A
Authority
GB
United Kingdom
Prior art keywords
current
path
input
amplifier
resistor
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
GB3002471A
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.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
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 Pye Ltd filed Critical Pye Ltd
Priority to GB3002471A priority Critical patent/GB1358871A/en
Priority to JP6595671A priority patent/JPS5538613B1/ja
Priority to DE2230142A priority patent/DE2230142A1/en
Priority to US265329A priority patent/US3870160A/en
Publication of GB1358871A publication Critical patent/GB1358871A/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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/26—Arbitrary function generators
    • G06G7/28—Arbitrary function generators for synthesising functions by piecewise approximation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
    • B66C2700/084—Protection measures

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Amplifiers (AREA)

Abstract

1358871 Function generators PYE Ltd 25 June 1971 30024/71 Heading G4G [Also in Division G1] A low generator comprises amplifier 55 with feedback resistor 56 and input paths 57-61 of which paths 57-60 are connected to an input voltage V IN , variable over the range 0 to + 5 v. Input path 61 connects to a -5v. reference voltage via a preset potentiometer so that current I 5 is constant as shown at 76. Input 57 includes resistor 62 so current I 1 flowing to virtual earth input of amplifier 55 varies linearly with V IN as shown at 63. Current I 2 flowing in path 58 increases linearly with V IN until transistor 66 conducts and is thereafter constant as shown at 69. Path 59 acts similarly to path 58 but includes an inverting amplifier 70 so current I 3 is of opposite polarity to I 1 , I 2 and is as shown at 72. Path 60 includes a series switching circuit and no current flows in this path until V IN reaches a level, determined by potentiometer 73, at which the switching circuit conducts when current I 4 commences to flow and increases linearly with V IN as shown at 74. Total current I TOT at amplifier 55 input is the sum of currents I 1 to I 5 and varies as shown at 77. The output voltage of the amplifier is always such as to provide a current through resistor 56 equal and opposite to I TOT so that amplifier output voltage follows the curve 77 but is of opposite sign.
GB3002471A 1971-06-25 1971-06-25 Crane load indicator arrangement Expired GB1358871A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3002471A GB1358871A (en) 1971-06-25 1971-06-25 Crane load indicator arrangement
JP6595671A JPS5538613B1 (en) 1971-06-25 1971-08-30
DE2230142A DE2230142A1 (en) 1971-06-25 1972-06-21 DEVICE FOR DISPLAYING THE MAXIMUM LOAD FOR A CRANE
US265329A US3870160A (en) 1971-06-25 1972-06-22 Crane safe load indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3002471A GB1358871A (en) 1971-06-25 1971-06-25 Crane load indicator arrangement

Publications (1)

Publication Number Publication Date
GB1358871A true GB1358871A (en) 1974-07-03

Family

ID=10301038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3002471A Expired GB1358871A (en) 1971-06-25 1971-06-25 Crane load indicator arrangement

Country Status (4)

Country Link
US (1) US3870160A (en)
JP (1) JPS5538613B1 (en)
DE (1) DE2230142A1 (en)
GB (1) GB1358871A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003939A2 (en) * 1978-03-01 1979-09-05 Michel Gutierrez Improvements in hydraulically operated lifting devices
GB2353513A (en) * 1999-07-07 2001-02-28 Liebherr Werk Ehingen Crane lifting capacity optimisation

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057792A (en) * 1970-01-21 1977-11-08 Ludwig Pietzsch Overload safety device for telescopic cranes
GB1462785A (en) * 1973-05-11 1977-01-26 Pye Ltd Crane load indicating arrangement
DE2400310C3 (en) * 1974-01-04 1981-02-26 Erhard 5509 Kell Kirsten Tilting moment protection for a telescopic jib crane
AT343860B (en) * 1975-02-04 1978-06-26 Krueger & Co Kg DEVICE FOR CONTROLLING A CRANE JIB DRIVE
US4054055A (en) * 1976-08-06 1977-10-18 Precilec Device for controlling the load of a lifting appliance
US4236864A (en) * 1978-11-09 1980-12-02 Raymond Couture Safety control system for the boom of a crane
EP0029768B1 (en) * 1979-11-12 1986-04-23 FMC EUROPE S.A. Société anonyme dite: Process and apparatus for watching and controlling an articulated fluid-transfer arm for linking a ship to a platform in the sea
KR910002234B1 (en) * 1982-12-01 1991-04-08 히다찌 겡끼 가부시기가이샤 Load weight indicating system for load moving machine
US4906981A (en) * 1988-07-20 1990-03-06 Nield Barry J Method and apparatus for monitoring the effective load carried by a crane
GB9326347D0 (en) * 1993-12-23 1994-02-23 Grove Europ Limited Improvements in and relating to telescopic booms
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
US20040200644A1 (en) * 2003-04-08 2004-10-14 Alan Paine Safe load lifting measurement device
FR2884104B1 (en) * 2005-03-29 2009-07-03 Pierre Dumas SWITCH ADJUSTMENT
JP6382769B2 (en) 2014-08-07 2018-08-29 東京エレクトロン株式会社 Joining apparatus, joining system, joining method, program, and computer storage medium
JP6177739B2 (en) 2014-08-07 2017-08-09 東京エレクトロン株式会社 Joining apparatus, joining system, joining method, program, and computer storage medium
JP6956645B2 (en) * 2018-02-06 2021-11-02 住友重機械建機クレーン株式会社 Suspension load arithmetic unit
IT201800010918A1 (en) * 2018-12-10 2020-06-10 Manitou Italia Srl Improved safety system for self-propelled machinery.
US10994970B2 (en) 2019-07-29 2021-05-04 Jim D. Wiethorn Crane risk logic apparatus and system and method for use of same
CN111675103B (en) * 2020-06-17 2022-04-15 三一海洋重工有限公司 Arm support pitching switching control method and control system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079080A (en) * 1960-02-12 1963-02-26 Henry L Mason Crane warning system
US3534355A (en) * 1967-03-28 1970-10-13 Dole Valve Co Load warning device
US3641551A (en) * 1968-12-19 1972-02-08 Grove Mfg Co Safe load control system for telescopic crane booms
US3559143A (en) * 1969-07-11 1971-01-26 Clary Corp Apparatus for generating trigonometric functions corresponding to angular movement
US3618064A (en) * 1969-08-20 1971-11-02 Eaton Yale & Towne Crane computer
JPS552342B2 (en) * 1973-08-04 1980-01-19

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003939A2 (en) * 1978-03-01 1979-09-05 Michel Gutierrez Improvements in hydraulically operated lifting devices
FR2418766A1 (en) * 1978-03-01 1979-09-28 Michel Gutierrez IMPROVEMENT IN HYDRAULIC CONTROLLED LIFTING DEVICES
EP0003939A3 (en) * 1978-03-01 1980-04-16 Michel Gutierrez Improvements in hydraulically operated lifting devices
GB2353513A (en) * 1999-07-07 2001-02-28 Liebherr Werk Ehingen Crane lifting capacity optimisation
GB2353513B (en) * 1999-07-07 2003-09-03 Liebherr Werk Ehingen Lifting capacity optimisation when making crane movements

Also Published As

Publication number Publication date
DE2230142A1 (en) 1973-01-11
US3870160A (en) 1975-03-11
JPS5538613B1 (en) 1980-10-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
433D Application made for revocation (sect. 33/1949)
433A Case decided by the comptroller ** patent amended (sect. 33/1949)
SPA Amended specification published
PCNP Patent ceased through non-payment of renewal fee