Unusual Forms of Mainspring
A mainspring is usually a coiled metal spring, however there are exceptions:
- The wagon spring clock: During a brief time in American clockmaking history coilable spring steel was not available in the USA and inventive clockmakers built clocks powered by a stack of leafsprings, similar what has traditionally served as a suspension spring for wagons.
- Other spring types are conceivable and have been used occasionally on experimental timepieces, such as e.g. torsion springs.
- Occasionally one finds an odd clock with a spring made of material other than metal, such as e.g. synthetic elastic materials.
Read more about this topic: Mainspring
Famous quotes containing the words unusual, forms and/or mainspring:
“This religion takes away the courage of thinking of unusual things and prohibits self-examination above all as the most egregious of sins.... It is one step away from protestantism.”
—Stendhal [Marie Henri Beyle] (1783–1842)
“We can imagine a society in which no one could survive as a social being because it does not correspond to biologically determined perceptions and human social needs. For historical reasons, existing societies might have such properties, leading to various forms of pathology.”
—Noam Chomsky (b. 1928)
“Thus all our dignity lies in thought. Through it we must raise ourselves, and not through space or time, which we cannot fill. Let us endeavor, then, to think well: this is the mainspring of morality.”
—Blaise Pascal (1623–1662)