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:
“... it was not very unusual at Washington for a lady to take the arm of a gentleman, who was neither her husband, her father, nor her brother. This remarkable relaxation of American decorum has been probably introduced by the foreign legations.”
—Frances Trollope (1780–1863)
“Ring out a slowly dying cause,
And ancient forms of party strife;
Ring in the nobler modes of life,
With sweeter manners, purer laws.”
—Alfred Tennyson (1809–1892)
“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)