When the first Angus sire arrived at Spring Cove Ranch in 1919, no one could have predicted his legacy. Old, handwritten herd books trace the first pedigrees of the Butler herd to a time when cattle ...

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A wheel provided with suitably shaped teeth, receiving an intermittent circular motion from an oscillating or reciprocating member, is called a ratchet wheel. A simple form of ratchet mechanism is ...

Linkage are composed of links and lower pairs. The simplest closed-loop linkage is the four-bar linkage, which has three moving links, one fixed link and four pin joints. A linkage with one link fixed ...