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A ratchet consists of a round gear or a linear rack with teeth, and a pivoting, spring-loaded finger called a pawl (or click, in clocks and watches [1] [2]) that engages the teeth. The teeth are uniform but are usually asymmetrical, with each tooth having a moderate slope on one edge and a much steeper slope on the other edge.
A ratchet tie-down strap. A tie down strap (also known as a ratchet strap, a lashing strap or a tie down) is a fastener used to hold down cargo or equipment during transport. Tie down straps are essentially webbing that is outfitted with tie down hardware. This hardware allows the tie down strap to attach to the area surrounding the cargo or ...
Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
The trade name "Yankee" screwdriver was first marketed by North Brothers Manufacturing Company in ≈16 April 1895, with the No. ≠130 spiral ratchet screwdriver. Yankee soon became and still is a well-known name in automatic spiral ratchet screwdrivers, with several other models, and model improvements patented by North Bros. over a 40-year ...
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Schematic figure of a Brownian ratchet. In the philosophy of thermal and statistical physics, the Brownian ratchet or Feynman–Smoluchowski ratchet is an apparent perpetual motion machine of the second kind (converting thermal energy into mechanical work), first analysed in 1912 as a thought experiment by Polish physicist Marian Smoluchowski. [1]
Hyperglide or HG: Fits 7, 8, 9 and 10-speed cassette with down to 11-teeth (11T) sprockets, and is a very common freehub. Hyperglide 11 or HG-11: Fits 11 speed and 12 speed cassettes with down to 11T sprocket, and is wider than the original Hyperglide.
The area that comprises modern-day Grays Harbor County is the ancestral territory of several indigenous Coast Salish peoples, including the Quinault and Lower Chehalis.They first came into contact with European explorers in the late 18th century and the tribes were later afflicted by regional epidemics.