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  2. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    This is a list of puzzles that cannot be solved. An impossible puzzle is a puzzle that cannot be resolved, either due to lack of sufficient information, or any number of logical impossibilities. Kookrooster maken 23; 15 Puzzle – Slide fifteen numbered tiles into numerical order. It is impossible to solve in half of the starting positions.

  3. Overhead crane - Wikipedia

    en.wikipedia.org/wiki/Overhead_crane

    The double girder overhead crane structure is used for heavier applications up to 125 tons and reaching over 100 feet of span. It can also be used to gain lifting height because the hoist of the double girder overhead crane is placed on the beams and the hook fits between them. Suspended Overhead Crane. The rails of a suspended overhead crane ...

  4. Electric overhead traveling crane - Wikipedia

    en.wikipedia.org/wiki/Electric_overhead...

    A single girder EOT crane has one main girder, making it easy to install, and requires less maintenance. The most common single girder EOT cranes are as follows: LD type single girder EOT crane; LDP type single girder EOT crane and; HD type single girder EOT crane; It is used for lighter industrial applications as it has lower weight limits.

  5. Gantry crane - Wikipedia

    en.wikipedia.org/wiki/Gantry_crane

    A gantry crane is a crane built atop a gantry, which is a structure used to straddle an object or workspace. They can range from enormous "full" gantry cranes, capable of lifting some of the heaviest loads in the world, to small shop cranes, used for tasks such as lifting automobile engines out of vehicles.

  6. Jumble - Wikipedia

    en.wikipedia.org/wiki/Jumble

    An example Jumble-style puzzle. Jumble is a word puzzle with a clue, a drawing illustrating the clue, and a set of words, each of which is “jumbled” by scrambling its letters. A solver reconstructs the words, and then arranges letters at marked positions in the words to spell the answer phrase to the clue.

  7. Block and tackle - Wikipedia

    en.wikipedia.org/wiki/Block_and_tackle

    A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.

  8. Level luffing crane - Wikipedia

    en.wikipedia.org/wiki/Level_luffing_crane

    A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [ 1 ] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.

  9. Crossword - Wikipedia

    en.wikipedia.org/wiki/Crossword

    An American-style 15×15 crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues.