Search results
Results From The WOW.Com Content Network
George Barnard Grant (December 21, 1849 – August 16, 1917) was an American mechanical engineer, inventor, entrepreneur and botanist. [1] He is notable for having made important contributions to 19th-century mechanical calculators, for pioneering new techniques in gear making, and for starting several successful companies.
A rack and pinion has roughly the same purpose as a worm gear with a rack replacing the gear, in that both convert torque to linear force. However the rack and pinion generally provides higher linear speed — since a full turn of the pinion displaces the rack by an amount equal to the pinion's pitch circle whereas a full rotation of the worm screw only displaces the rack by one tooth width.
A rack is a toothed bar or rod that can be thought of as a sector gear with an infinitely large radius of curvature. Torque can be converted to linear force by meshing a rack with a round gear called a pinion: the pinion turns, while the rack moves in a straight line.
C. William Gear (Charles William "Bill" Gear; 1 February 1935, in London [1] – 15 March 2022, in Princeton, New Jersey [2]) was a British-American mathematician who specialized in numerical analysis and computer science. Gear was an American citizen.
Two involute gears, the left driving the right: Blue arrows show the contact forces between them (1) downward force applied by the left gear and (2) upward resistance by the right gear. The force line (or line of action ) runs along the long leg of dashed blue line which is a tangent common to both base circles.
In many cases, such as remote controlled toys, the pinion is also the drive gear for a reduction in speed, since electric motors operate at higher speed and lower torque than desirable at the wheels. However the reverse is true in watches, where gear trains commence with a high-torque, low-speed spring and terminate in the fast-and-weak escapement.
Altra is the parent company of several power transmission industry brands, including: Ameridrives, Boston Gear, Warner Electric, TB Wood's, Stieber Clutch, Twiflex, Matrix International and Wichita Clutch. [2] On March 27, 2023, the company was acquired by Regal Rexnord Corp. [3]
The cog, or rack and pinion, system that allows the locomotive to climb Mount Washington. Located in the museum. The rack rail design used is one of Marsh's own inventions, using a ladder-like rack with open bar rungs engaged by the teeth of the cog wheel. This system allows snow and debris to fall through the rack, rather than lodging in it. [42]