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Leupold & Stevens, Inc. is an American manufacturer of telescopic sights, red dot sights, binoculars, rangefinders, spotting scopes, and eyewear located in Beaverton, Oregon, United States. The company, started in 1907, is on its fifth generation of family ownership.
21st-century hunting compound crossbow. A crossbow is a ranged weapon using an elastic launching device consisting of a bow-like assembly called a prod, mounted horizontally on a main frame called a tiller, which is hand-held in a similar fashion to the stock of a long gun. Crossbows shoot arrow-like projectiles called bolts or quarrels.
Jacob Leupold (22 July 1674 – 12 January 1727) was a German physicist, mathematician, instrument maker, mining commissioner and engineer. He wrote the seminal book Theatrum Machinarum Generale ("The General Theory of Machines").
Excalibur is the mythical sword of King Arthur that may possess magical powers or be associated with the rightful sovereignty of Britain. Its first reliably datable appearance is found in Geoffrey of Monmouth 's Historia Regum Britanniae .
The Chinese crossbow had a longer power stroke, around 51 cm (20 in) or so, compared to the early medieval European crossbow, which typically sat around only 10–18 cm (3.9–7.1 in). This was made possible by the more compact design of the Chinese trigger, which allowed it to sit further back at the rear-end of the tiller.
Excalibur (alternate titles: Dark Sword, The One Command) is an unpublished manuscript written in 1938 by L. Ron Hubbard, later the founder of Scientology. The contents of Excalibur formed the basis for Dianetics: The Modern Science of Mental Health (1950) and some of Hubbard's later publications.