In oil-shear brake and clutch units, friction plates and oil work together to slow and accelerate systems. Consider oil-shear clutching: Upon startup, rotating input discs move toward stationary ...
This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
Though the first Lister sheep shears were made in 1909 (and are still being made to this day) the company’s origins are much older. In fact the name dates back to 1867 when Robert Ashton Lister ...
It is a name that, for more than a century, was closely intertwined with UK manufacturing. More recently, it has been a name known to builders and plumbers up and down the country. And, today, ...