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The ball screw was invented independently by H.M. Stevenson and D. Glenn who were issued in 1898 patents 601,451 and 610,044 respectively. Early precise screwshafts were produced by starting with a low-precision screwshaft, and then lapping the shaft with several spring-loaded nut laps [citation needed].
Stephen Joseph Cannell (/ ˈ k æ n əl /; February 5, 1941 – September 30, 2010) was an American television producer, writer, novelist, actor, and founder of Cannell Entertainment (formerly Stephen J. Cannell Productions) and The Cannell Studios.
Richie Brockelman, Private Eye is an American detective drama that was broadcast on NBC for five episodes in March and April 1978, with Dennis Dugan in the starring role. The Rockford Files was used to launch the series via character crossover in a 2-hour episode at the end of the 1977-78 season.
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The term fine adjustment screw typically refers to screws with threads from 40–100 TPI (Threads Per Inch) (0.5 mm to 0.2 mm pitch) and ultra fine adjustment screw has been used to refer to 100–254 TPI (0.2 mm to 0.1 mm pitch). These screws are most frequently used in applications where the screw is used to control fine motion of an object.