RACK n.
ld tight by the use of a small stick of wood twisted around. -- Rack rail (Railroads), a toothed rack, laid as a rail, to afford a hold for teeth on the driving wheel of locomotive for climbing steep gradients, as in ascending a mountain. -- Rack saw, a saw having wide teeth. -- Rack stick, the stick used in a rack…
SHRIKE n.
of numerous species of oscinine birds of the family Laniidæ, having a strong hooked bill, toothed at the tip. Most shrikes are insectivorous, but the common European gray shrike (Lanius excubitor), the great northern shrike (L. borealis), and several others, kill mice, small birds, etc., and often impale them on thorns…
SKEW a.
ted curve. See Plane curve, under Curve. -- Skew gearing, or Skew bevel gearing (Mach.), toothed gearing, generally resembling bevel gearing, for connecting two shafts that are neither parallel nor intersecting, and in which the teeth slant across the faces of the gears. -- Skew surface (Geom.), a ruled surface such…
SPERM WHALE n.
A very large toothed whale (Physeter macrocephalus), having a head of enormous size. The upper jaw is destitute of teeth. In the upper part of the head, above the skull, there is a large cavity, or case, filled with oil and spermaceti. This whale sometimes grows to the length of more than eighty feet. It is found in th…
SUN n.
on, as that of the working beam of a steam engine, into rotatory motion. It consists of a toothed wheel (called the sun wheel), firmly secured to the shaft it is desired to drive, and another wheel (called the planet wheel) secured to the end of a connecting rod. By the motion of the connecting rod, the planet wheel is…