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  2. Springald - Wikipedia

    en.wikipedia.org/wiki/Springald

    Modern reconstruction of a torsion springald, the twisted skeins powering the inward projecting bow arms can be seen. Displayed at the Tower of London. Several reconstructed examples can be found, Jean Leibell produced a 12-inch (30.5 cm) model for his researches into "Springalds and Great Crossbows" which was commissioned by the Royal Armouries Museum, and a larger model can be seen at the ...

  3. Detent - Wikipedia

    en.wikipedia.org/wiki/Detent

    To resist movement (or when creating incremental steps), methods are employed which include a spring-loaded ball detent that locates in small incremental depressions, or a piece of spring steel that snaps into position on flat surfaces or shallow notches milled into the shaft or wheel.

  4. History of crossbows - Wikipedia

    en.wikipedia.org/wiki/History_of_crossbows

    This source refers to the use of a giant crossbow between the 6th and 5th centuries BC, corresponding to the late Spring and Autumn period. Sun Tzu 's The Art of War (first appearance dated between 500 BC to 300 BC [ 18 ] ) refers to the characteristics and use of crossbows in chapters 5 and 12 respectively, [ 19 ] and compares a drawn crossbow ...

  5. Positive locking device - Wikipedia

    en.wikipedia.org/wiki/Positive_locking_device

    A wheel hub with a castellated nut secured in the center using a cotter pin to prevent it from unscrewing. A positive locking device is a device used in conjunction with a fastener in order to positively lock the fastener.

  6. Bullet-shooting crossbow - Wikipedia

    en.wikipedia.org/wiki/Bullet-shooting_crossbow

    The English changed the design to allow for a more powerful spring and larger ammunition. The bow was adapted to shoot half ounce lead bullets, which are more accurate and do much more damage than stones and clay pellets. [5] The bullet-shooting crossbow featured many similarities to the slingshot, a similar weapon. Both feature a pouch that ...

  7. Ballista - Wikipedia

    en.wikipedia.org/wiki/Ballista

    The gastraphetes ('belly-bow') was a handheld crossbow. It had a composite prod and was spanned by bracing the front end of the weapon against the ground while placing the end of a slider mechanism against the stomach. The operator would then walk forward to arm the weapon while a ratchet prevented it from shooting during loading.