What is "swing beam"

Swing \Swing\, n.

1. The act of swinging; a waving, oscillating, or vibratory motion of a hanging or pivoted object; oscillation; as, the swing of a pendulum.

2. Swaying motion from one side or direction to the other; as, some men walk with a swing.

3. A line, cord, or other thing suspended and hanging loose, upon which anything may swing; especially, an apparatus for recreation by swinging, commonly consisting of a rope, the two ends of which are attached overhead, as to the bough of a tree, a seat being placed in the loop at the bottom; also, any contrivance by which a similar motion is produced for amusement or exercise.

4. Influence of power of a body put in swaying motion.

   The ram that batters down the wall, For the great swing and rudeness of his poise, They place before his hand that made the engine.
   --Shak.

5. Capacity of a turning lathe, as determined by the diameter of the largest object that can be turned in it.

6. Free course; unrestrained liberty or license; tendency. ``Take thy swing.'' --Dryden. To prevent anything which may prove an obstacle to the full swing of his genius. --Burke. Full swing. See under Full. Swing beam (Railway Mach.), a crosspiece sustaining the car body, and so suspended from the framing of a truck that it may have an independent lateral motion. Swing bridge, a form of drawbridge which swings horizontally, as on a vertical pivot. Swing plow, or Swing plough.

   1. A plow without a fore wheel under the beam.

   2. A reversible or sidehill plow. Swing wheel.

      1. The scape-wheel in a clock, which drives the pendulum.

      2. The balance of a watch.