GB1479031A - Load indicating systems for cranes - Google Patents

Load indicating systems for cranes

Info

Publication number
GB1479031A
GB1479031A GB3139374A GB3139374A GB1479031A GB 1479031 A GB1479031 A GB 1479031A GB 3139374 A GB3139374 A GB 3139374A GB 3139374 A GB3139374 A GB 3139374A GB 1479031 A GB1479031 A GB 1479031A
Authority
GB
United Kingdom
Prior art keywords
load
signal
amplifier
switch
representing
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
GB3139374A
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.)
Forney International Inc
Original Assignee
Forney International Inc
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
Priority claimed from US382403A external-priority patent/US3893093A/en
Priority claimed from US382402A external-priority patent/US3866200A/en
Application filed by Forney International Inc filed Critical Forney International Inc
Publication of GB1479031A publication Critical patent/GB1479031A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

1479031 Measuring crane load FORNEY INTERNATIONAL Inc 16 July 1974 [25 July 1973(2)] 31393/74 Heading GIN [Also in Division B8] A load indicating system for a crane includes a load cell 30 monitoring tension in a line suspending the load and including a strain gauge resistance bridge, the cell signal being amplified 102 and the resultant signal being multiplied by a signal derived from the setting of a manually adjustable switch (54) Fig.5 (not shown) representing the number of lines by which the load is suspended, in a circuit including a second amplifier 114. The resultant total load signal is compared in a third amplifier 130 circuit with a limit load signal set by manually adjustable switch (56) and in the event of an overload transistor Q 1 is triggered to activate audible and visible alarms. A self-check facility is provided whereby relay R L1 actuates switch 146 to provide a voltage representing a given load to first amplifier 102 and a given multiplier representing the number of lines is simulated by switching R 53 into circuit via switch 138. A boom angle measuring system is also provided using a potentiometer 222 with its slider coupled to the boom and providing a signal to amplifier 258.
GB3139374A 1973-07-25 1974-07-16 Load indicating systems for cranes Expired GB1479031A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US382403A US3893093A (en) 1973-07-25 1973-07-25 Crane boom angle indication and warning system
US382402A US3866200A (en) 1973-07-25 1973-07-25 Load measuring and overload warning system

Publications (1)

Publication Number Publication Date
GB1479031A true GB1479031A (en) 1977-07-06

Family

ID=27009745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3139374A Expired GB1479031A (en) 1973-07-25 1974-07-16 Load indicating systems for cranes

Country Status (8)

Country Link
JP (1) JPS532791B2 (en)
BR (1) BR7406147D0 (en)
DE (1) DE2435686A1 (en)
ES (1) ES428618A1 (en)
FR (1) FR2245565B1 (en)
GB (1) GB1479031A (en)
IT (1) IT1018262B (en)
NL (1) NL7409990A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118721A (en) * 1982-03-04 1983-11-02 Hunosa Empresa Nacional Huller Guide control control equipment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738307A1 (en) * 1977-08-25 1979-03-08 Koepp Elektronik Gmbh Electronic monitoring system for crane - evaluates load moment signal fed to threshold device connected to motor control
CN107406612B (en) 2015-03-31 2021-04-02 积水化学工业株式会社 Crosslinked polyolefin resin foam
CN113091966A (en) * 2021-03-01 2021-07-09 中煤第七十二工程有限公司 Load controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118721A (en) * 1982-03-04 1983-11-02 Hunosa Empresa Nacional Huller Guide control control equipment

Also Published As

Publication number Publication date
DE2435686A1 (en) 1975-02-13
ES428618A1 (en) 1977-01-01
IT1018262B (en) 1977-09-30
NL7409990A (en) 1975-01-28
AU7158774A (en) 1976-01-29
FR2245565B1 (en) 1978-08-11
FR2245565A1 (en) 1975-04-25
JPS532791B2 (en) 1978-01-31
JPS5050966A (en) 1975-05-07
BR7406147D0 (en) 1975-04-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee