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 contactInfo
- 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
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.
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) |
-
1978
- 1978-03-21 FR FR7808173A patent/FR2420503A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2420503B3 (en) | 1980-12-05 |
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