A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion or vice-versa. It is often a part of a rotating wheel (e.g. an eccentric wheel) or shaft (e.g. a cylinder with an irregular shape) that strikes a lever at one or more points on its circular path. The cam can be a simple tooth, as is used to deliver pulses of power to a steam hammer, for example, or an eccentric disc or other shape that produces a smooth reciprocating (back and forth) motion in the follower, which is a lever making contact with the cam.
Famous quotes containing the word cam:
“There were twa sisters sat in a bour;
Binnorie, O Binnorie!
There cam a knight to be their wooer,
By the bonnie milldams o Binnorie.”
—Unknown. Binnorie; or, The Two Sisters (l. 14)
“Sometimes she sank, sometimes she swam,
Until she cam to the millers dam.”
—Unknown. Binnorie; or, The Two Sisters (l. 2122)
“The youngest stood upon a stane,
The eldest cam and pushd her in.”
—Unknown. Binnorie; or, The Two Sisters (l. 1516)