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  2. Rail fastening system - Wikipedia

    en.wikipedia.org/wiki/Rail_fastening_system

    A chair screw (also known as coach screw [16]) is a large (~6 in or 152 mm length, slightly under 1 in or 25 mm diameter) metal screw used to fix a chair (for bullhead rail), baseplate (for flat bottom rail) or to directly fasten a rail. Chair screws are screwed into a hole bored in the sleeper. [17]

  3. Stair lift - Wikipedia

    en.wikipedia.org/wiki/Stair_lift

    Stair lifts are available with either a manual swivel or a powered swivel, depending on the users ability. Most swivel seats have a safety switch so the stair lift will not move unless the seat is locked into its travel position. Special models with seats facing the bottom of the staircase have been produced for users with spinal or other ...

  4. Swivel chair - Wikipedia

    en.wikipedia.org/wiki/Swivel_chair

    A swivel, swivelling, spinny, or revolving chair is a chair with a single central leg that allows the seat to rotate 360 degrees to the left or right. A concept of a rotating chair with swivel castors was illustrated by the Nuremberg noble Martin Löffelholz von Kolberg in his 1505 technological illuminated manuscript , the so-called Codex ...

  5. Chairlift - Wikipedia

    en.wikipedia.org/wiki/Chairlift

    The two-person double chair, which for many years was the workhorse of the ski industry, can move roughly 1,200 people per hour at rope speeds of up to 2.5 m/s (8.2 ft/s). [2] The four person detachable chairlift ("high-speed quad") can transport 2,400 people per hour with an average rope speed of 5 m/s (16.4 ft/s). [ 3 ]

  6. Seat belt laws in the United States - Wikipedia

    en.wikipedia.org/wiki/Seat_belt_laws_in_the...

    Most seat belt laws in the United States are left to state law. However, the recommended age for a child to sit in the front passenger seat is 13. The first seat belt law was a federal law, Title 49 of the United States Code, Chapter 301, Motor Safety Standard, which took effect on January 1, 1968, that required all vehicles (except buses) to be fitted with seat belts in all designated seating ...

  7. Glossary of rail transport terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_rail_transport...

    Rail transport terms are a form of technical terminology applied to railways. Although many terms are uniform across different nations and companies, they are by no means universal, with differences often originating from parallel development of rail transport systems in different parts of the world, and in the national origins of the engineers and managers who built the inaugural rail ...

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