GB135665A - - Google Patents
Info
- Publication number
- GB135665A GB135665A GB135665DA GB135665A GB 135665 A GB135665 A GB 135665A GB 135665D A GB135665D A GB 135665DA GB 135665 A GB135665 A GB 135665A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fork
- arms
- plates
- electro
- magnet
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means
- B66C1/06—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means electromagnetic
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
135,665. Blunt, W. E. Deo. 16, 1918. Grab-forks.-The grab-fork has a frame built up of transverse plates 1 with bent-over ends connected by side plates 3 supported from a top plate 4 by struts 5. The top plate carries a hook or eyelet 7 for attachment to a crane, derrick, &c. The fork-arms 13 are mounted on the end plates 3 by pivots 12, each lateral pair of forkarms being connected by a load-engaging angleiron 14, and the opposed pairs being connected by safety chains 27 attached to hooks 28. The slotted inner ends of the fork-arms engage the ends of a plate 19 slidable in slots in plates 10 depending from the top plate 4. The plate 19 is centrally pivoted to the armature bar 20 of an electro-magnet arranged in a casing 22 secured to the plates 10. The fork-arms are so weighted that they are normally in the closed position shown in Fig. 4. By exciting the electro-magnet, the arms are opened to the load-engaging position and are retained in that position after the current has been cut-off, by means of a rotatable locking-rod 24<a>, which can be operated bv a handle 26 to displace the cut away part 25, Fig. 5, so that the rod engages a recess in the armature rod 26 and locks the fork-arms in the open position. The electro-magnet may be arranged to close the fork arms instead of opening them.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB135665A true GB135665A (en) | 1900-01-01 |
Family
ID=1728973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB135665D Expired GB135665A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB135665A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2736600A (en) * | 1952-09-23 | 1956-02-28 | Arthur J Carlson | Crane hook with reaction jet orienting means |
| EP0633215A1 (en) * | 1993-07-06 | 1995-01-11 | Commissariat A L'energie Atomique | Mechanical fall-preventing system for a heavy load gripping device |
| CN102951551A (en) * | 2012-11-12 | 2013-03-06 | 铜陵恒盛轨道装备有限责任公司 | Automatic clamping hoisting frame |
-
0
- GB GB135665D patent/GB135665A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2736600A (en) * | 1952-09-23 | 1956-02-28 | Arthur J Carlson | Crane hook with reaction jet orienting means |
| EP0633215A1 (en) * | 1993-07-06 | 1995-01-11 | Commissariat A L'energie Atomique | Mechanical fall-preventing system for a heavy load gripping device |
| FR2707276A1 (en) * | 1993-07-06 | 1995-01-13 | Commissariat Energie Atomique | Mechanical fall arrest system for a device for gripping heavy objects. |
| CN102951551A (en) * | 2012-11-12 | 2013-03-06 | 铜陵恒盛轨道装备有限责任公司 | Automatic clamping hoisting frame |
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