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Hart's first inversor, also known as Hart's W-frame, is based on an antiparallelogram. The addition of fixed points and a driving arm make it a 6-bar linkage. It can be used to convert rotary motion to a perfect straight line by fixing a point on one short link and driving a point on another link in a circular arc. [1] [3]
The simplest solutions are Hart's W-frame – which use 6-bars – and the Quadruplanar inversors – Sylvester-Kempe and Kumara-Kampling, which also use 6-bars. Sarrus linkage (1853) Peaucellier-Lipkin inversor (1864) Hart's first inversor / Hart's antiparallelogram / Hart's W-frame (1874) Hart's second inversor / Hart's A-frame (1875 ...
Although the Peaucellier–Lipkin linkage, Hart's inversor, and other straight line mechanisms generate true straight-line motion, Watt's linkage has the advantage of much greater simplicity than these other linkages.
Six-bar linkage from Kinematics of Machinery, 1876. In mechanics, a six-bar linkage is a mechanism with one degree of freedom that is constructed from six links and seven joints. [1]
Theo Jansen's linkage. When the blue line at the right end of the picture is driven in a clockwise rotary motion, the leg (blue triangle at the bottom) executes a walking motion.
William Surrey Hart (December 6, 1864 – June 23, 1946) was an American silent film actor, screenwriter, director and producer. [1] He is remembered as a foremost Western star of the silent era who "imbued all of his characters with honor and integrity."
A successor company to Janentzky & Weber Manufacturers & Importers, F. Weber & Company, Inc. was established in 1853, [4] and has been known for quality and innovation throughout its history, for example in the late 19th and early 20th centuries—the golden years of the prestigious World Fair—F. Weber & Co. frequently won gold medals for its fine quality products.
Frames 4, 8, 12, 16, 20, and 24 are used to send the fixed framing pattern, 001011. The CRC is computed using the polynomial x 6 + x +1 over all 24×193 = 4632 bits (framing and data) of the previous superframe, but with its framing bits forced to 1 for the purpose of CRC computation. [ 4 ]