FR2420503A1 - Large cranes interference prevention system - uses wires on each crane to close electric circuit when in contact - Google Patents

Large cranes interference prevention system - uses wires on each crane to close electric circuit when in contact

Info

Publication number
FR2420503A1
FR2420503A1 FR7808173A FR7808173A FR2420503A1 FR 2420503 A1 FR2420503 A1 FR 2420503A1 FR 7808173 A FR7808173 A FR 7808173A FR 7808173 A FR7808173 A FR 7808173A FR 2420503 A1 FR2420503 A1 FR 2420503A1
Authority
FR
France
Prior art keywords
crane
electric circuit
boom
contact
prevention system
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.)
Granted
Application number
FR7808173A
Other languages
French (fr)
Other versions
FR2420503B3 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7808173A priority Critical patent/FR2420503A1/en
Publication of FR2420503A1 publication Critical patent/FR2420503A1/en
Application granted granted Critical
Publication of FR2420503B3 publication Critical patent/FR2420503B3/fr
Granted 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
    • B66C15/04—Safety gear for preventing collisions, e.g. between cranes or trolleys operating on the same track

Landscapes

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

Abstract

When large cranes are used close to each other there is a danger of the boom of one crane striking the ropes carrying the load of the other crane. A system for giving a warning of an impending collision consists of running a length of bare wire (13) supported on insulators (14) along the side of the boom (4) of the lower crane (2). The crane (1) with the higher boom (5) has four wires suspended from the boom (5) and attached to rods which project radially from the puley block. If the wire (13) touches any of the wires (19-22) an electric circuit is closed and emits a warning signal.
FR7808173A 1978-03-21 1978-03-21 Large cranes interference prevention system - uses wires on each crane to close electric circuit when in contact Granted FR2420503A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7808173A FR2420503A1 (en) 1978-03-21 1978-03-21 Large cranes interference prevention system - uses wires on each crane to close electric circuit when in contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7808173A FR2420503A1 (en) 1978-03-21 1978-03-21 Large cranes interference prevention system - uses wires on each crane to close electric circuit when in contact

Publications (2)

Publication Number Publication Date
FR2420503A1 true FR2420503A1 (en) 1979-10-19
FR2420503B3 FR2420503B3 (en) 1980-12-05

Family

ID=9206092

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7808173A Granted FR2420503A1 (en) 1978-03-21 1978-03-21 Large cranes interference prevention system - uses wires on each crane to close electric circuit when in contact

Country Status (1)

Country Link
FR (1) FR2420503A1 (en)

Also Published As

Publication number Publication date
FR2420503B3 (en) 1980-12-05

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