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Animation showing the construction of a geared five-bar cognate linkages from an initial four-bar cognate. A five-bar linkage has two degrees of freedom, and thus there does not exist a five-bar linkage which is capable of acting as a cognate. [Note 1] However, it is possible to generate a 5-bar cognate using gears. Select four-bar linkage of ...
This list contains Germanic elements of the English language which have a close corresponding Latinate form. The correspondence is semantic—in most cases these words are not cognates, but in some cases they are doublets, i.e., ultimately derived from the same root, generally Proto-Indo-European, as in cow and beef, both ultimately from PIE *gʷōus.
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Cognates also do not need to look or sound similar: English father, French père, and Armenian հայր (hayr) all descend directly from Proto-Indo-European *ph₂tḗr. An extreme case is Armenian երկու ( erku ) and English two , which descend from Proto-Indo-European *dwóh₁ ; the sound change *dw > erk in Armenian is regular.
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The linkage was first shown in Paris on the Exposition Universelle (1878) as "The Plantigrade Machine". [ 5 ] [ 3 ] The Chebyshev Lambda Linkage is a cognate linkage of the Chebyshev linkage . The Chebyshev Lambda Linkage is used in vehicle suspension mechanisms, walking robots, and rover wheel mechanisms.
Cognate object, a verb's object that is etymologically related to the verb; Cognate (kinship), person who shares a common ancestor; Cognate linkage, a kinematic linkage that generates the same coupler curve as another linkage of a different geometry; Cognate interaction, in immunology denotes the specific, contact-dependent interaction between ...
In kinematics, the Hoecken linkage (named for Karl Hoecken) [1] is a four-bar linkage that converts rotational motion to approximate straight-line motion. The Hoecken linkage is a cognate linkage of the Chebyshev linkage and Chebyshev's Lambda Mechanism. The linkage was first published in 1926. [2] [3]