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The barring engine needed to turn these rope drives over as well (although they were disconnected from the machinery at the remote end) and a simple manual gear was no longer sufficient. Around 1881–1883 there was a shift to the use of steam-powered barring engines.
A strut bar, strut brace, or strut tower brace (STB) is an automotive suspension accessory on a monocoque or unibody chassis to provide extra stiffness between the strut towers. With a MacPherson strut suspension system where the spring and shock absorber combine in one suspension unit, which also replaces the upper control arm, the entire ...
From 1939 all new-build steam locomotives had to be fitted with power reversers and from 1942 Johnson-bar–fitted engines undergoing heavy overhaul or rebuilding had to be retro-fitted with power reverse. Exceptions existed for light, low-powered locomotives and switchers (shunters). For switching, which required frequent changes of direction ...
Some Johnson bars have a fully ratcheting mechanism, some just a series of detents, and others yet simply engaged and disengaged positions. A common example is the Johnson bar-controlled parking brake found on many trucks and buses. Johnson bar is also the North American term for a steam engine's reversing lever, used to control the valve gear ...
[5] [7]: 18 Early American locomotives had bar frames, made from steel bar; in the 20th century they usually had cast steel frames or, in the final decades of steam locomotive design, a cast steel locomotive bed – a one-piece steel casting for the entire locomotive frame, cylinders, valve chests, steam pipes, and smokebox saddle, all as a ...
The original feature of the patent was what is now called tube-over-bar (TOB) design which only saw limited use in the 1960s (for example, on LVTP-7). Even though Barnes was employed by the US Army Ordnance Department, torsion bars were not used in American armor designs until the T70 GMC in 1943, which suspension was derived from Pz. III by GM ...
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An anti-roll bar (roll bar, anti-sway bar, sway bar, stabilizer bar) is an automobile suspension part that helps reduce the body roll of a vehicle during fast cornering or over road irregularities. It links opposite front or rear wheels to a torsion spring using short lever arms for anchors.