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A worm drive tuning device is called a machine head. Plastic worm drives are often used on small battery-operated electric motors, to provide an output with a lower angular velocity (fewer revolutions per minute) than that of the motor, which operates best at a fairly high speed, in addition to being quieter than a drive with metal gears. [8]
The in-line engine was inherently suitable for shaft drive, and BMW-style bevel gears would have been ideal. However, having inherited some worm-gear machinery from the Lanchester Motor Company, BSA opted to specify worm drive rather than bevel gears. Reputedly this created problems with the shaft drive, as the gears tended to strip under power ...
Where a steam barring engine was used, this was a small twin-cylinder engine (to avoid its own dead centre problems) with a reduction gear of high ratio, usually involving a worm gear. Final drive was by a pinion gear engaging temporarily with the teeth or barring holes cut into the rim of the main flywheel.
Most small engines use a governor to maintain a constant engine speed under varying loads. Some engines also have a mechanism for the user to adjust the engine speed. Rather than directly controlling the opening of the carburetor throttle, this is usually achieved by adjusting the governor, which in turn regulates the engine speed higher or lower.
This was a 3.5-ton battery-powered vehicle, intended for local deliveries. Garrett obtained a patent, No.103,617 in 1916 for an interlocking device, that ensured that the current to the motor of an electric vehicle was disconnected automatically when the brakes were applied, and that ensured the vehicle could not be driven away with the ...
In a worm-drive saw, the blade is driven by a perpendicularly mounted motor using worm gears, which give higher torque. The worm-drive portable circular saw was invented in 1923 by Edmond Michel. In 1924 Michel formed a partnership with Joseph Sullivan, and together they started the Michel Electric Handsaw Company , with the sole purpose of ...
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The chassis was "underslung" at the rear with the main chassis members passing below the rear axle. In mid-1950 the restricted ground clearance was improved by the adoption of a conventional hypoid bevel drive to the rear axle replacing the traditional Daimler underslung worm drive which had hampered sales outside Britain. [6]
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