GB995091A - Improved electric means for detecting the load moment of cranes - Google Patents

Improved electric means for detecting the load moment of cranes

Info

Publication number
GB995091A
GB995091A GB3928061A GB3928061A GB995091A GB 995091 A GB995091 A GB 995091A GB 3928061 A GB3928061 A GB 3928061A GB 3928061 A GB3928061 A GB 3928061A GB 995091 A GB995091 A GB 995091A
Authority
GB
United Kingdom
Prior art keywords
signal
cranes
circuit
weight
load
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
GB3928061A
Inventor
Gerd Duncke
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to GB3928061A priority Critical patent/GB995091A/en
Publication of GB995091A publication Critical patent/GB995091A/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)
  • Control And Safety Of Cranes (AREA)

Abstract

995,091. Preventing overload of cranes. LICENTIA PATENT - VERWALTUNGS G.m.b.H. Nov. 2, 1961, No. 39280/61. Heading B8B. An overload prevention device for cranes comprises circuit elements producing electric signals which individually represent pay-load weight, tare weight and lever arm length, and a signal combining element producing a resulting signal which operates an alarm when a predetermined signal strength is reached. A signal proportional to load weight is fed to an amplifier 4 through terminals 8, 9 and the amplifier output is fed to an adding circuit 5. Here a signal proportional to the weight of the displaceable load supporting structure from a circuit 3 is combined with the first signal. In a multiplying circuit 2 the signal from circuit 5 is combined with a signal representing lever length from an amplifier 1. A potentiometer R 1 responds to luffing movements and a potentiometer R 2 compensates for movements of the crane base from a horizontal plane, e.g. in floating cranes. A first warning signal may be operated when 80% of safe load is reached.
GB3928061A 1961-11-02 1961-11-02 Improved electric means for detecting the load moment of cranes Expired GB995091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3928061A GB995091A (en) 1961-11-02 1961-11-02 Improved electric means for detecting the load moment of cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3928061A GB995091A (en) 1961-11-02 1961-11-02 Improved electric means for detecting the load moment of cranes

Publications (1)

Publication Number Publication Date
GB995091A true GB995091A (en) 1965-06-16

Family

ID=10408692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3928061A Expired GB995091A (en) 1961-11-02 1961-11-02 Improved electric means for detecting the load moment of cranes

Country Status (1)

Country Link
GB (1) GB995091A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228708A1 (en) * 1973-05-11 1974-12-06 Pye Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2228708A1 (en) * 1973-05-11 1974-12-06 Pye Ltd

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