ES419960A1 - Safety device for a crane which compares two signals - Google Patents

Safety device for a crane which compares two signals

Info

Publication number
ES419960A1
ES419960A1 ES419960A ES419960A ES419960A1 ES 419960 A1 ES419960 A1 ES 419960A1 ES 419960 A ES419960 A ES 419960A ES 419960 A ES419960 A ES 419960A ES 419960 A1 ES419960 A1 ES 419960A1
Authority
ES
Spain
Prior art keywords
load
crane
critical
signal
significant
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
ES419960A
Other languages
Spanish (es)
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.)
PPM SA
Potain Poclain Materiel PPM SA
Original Assignee
PPM SA
Potain Poclain Materiel PPM SA
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 PPM SA, Potain Poclain Materiel PPM SA filed Critical PPM SA
Publication of ES419960A1 publication Critical patent/ES419960A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
    • G01G19/18—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads having electrical weight-sensitive devices

Landscapes

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

Abstract

Security system for cranes, designed to prevent the lifting of a load exceeding the critical load, characterized by comprising a means of comparing two electrical signals, the first significant of the actual load in any of the configurations of the crane, the second significant of the critical or nominal load in this configuration, said means causes a third electrical signal of alarm at the moment in which the first signal is superior to the second, the second signal being made from at least one copying probe of the movement of the point of application of the load on the crane, in a vertical plane containing the arm, maintained the permanent electrical contact with at least one flat surface composed of regions of conductive plane, of which each of them is of a certain potential, these regions constituting a system of critical or nominal iso-load surfaces. (Machine-translation by Google Translate, not legally binding)
ES419960A 1972-11-27 1973-10-25 Safety device for a crane which compares two signals Expired ES419960A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7242099A FR2207853B1 (en) 1972-11-27 1972-11-27

Publications (1)

Publication Number Publication Date
ES419960A1 true ES419960A1 (en) 1976-04-16

Family

ID=9107767

Family Applications (1)

Application Number Title Priority Date Filing Date
ES419960A Expired ES419960A1 (en) 1972-11-27 1973-10-25 Safety device for a crane which compares two signals

Country Status (6)

Country Link
JP (1) JPS49134053A (en)
DE (1) DE2352725C2 (en)
ES (1) ES419960A1 (en)
FR (1) FR2207853B1 (en)
GB (1) GB1448748A (en)
IT (1) IT996985B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2390366A1 (en) * 1977-05-13 1978-12-08 Preux Roger STATE OF CHARGE CONTROLLER, ESPECIALLY FOR LIFTING EQUIPMENT

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171828B (en) * 1954-03-31 1964-06-04 Siemens Ag Bucket wheel excavator
GB1183190A (en) * 1967-08-15 1970-03-04 B & A Engineering Company Ltd Crane Radius Indicator or Crane Safe-Load Indicator Radius Compensating Device
US3618064A (en) * 1969-08-20 1971-11-02 Eaton Yale & Towne Crane computer
DE2101673C3 (en) * 1971-01-15 1974-02-07 Leo Gottwald Kg, 4000 Duesseldorf Device for limiting the load torque on jib cranes
DE2108142A1 (en) * 1971-02-19 1972-08-31 Pietzsch Ludwig Overload protection for telescopic cranes

Also Published As

Publication number Publication date
FR2207853A1 (en) 1974-06-21
GB1448748A (en) 1976-09-08
DE2352725C2 (en) 1983-09-01
FR2207853B1 (en) 1977-04-08
DE2352725A1 (en) 1974-05-30
IT996985B (en) 1975-12-10
JPS49134053A (en) 1974-12-24

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