Metal articles
What device dating back 64,000 years or more represents the functional precursor to the spring concept?
How did Ctesibius of Alexandria achieve the necessary elasticity in the bronze alloy used for crafting springs?
In which specific mechanical applications did functional coiled springs first prominently appear during the 15th century?
What specific clock construction dating around 1330 AD provides historical evidence mentioning "metal springs"?
What Latin phrase did Robert Hooke use to summarize the proportionality described in Hooke's Law in 1676?
What specific mechanical application was R. Tradwell's 1763 British Patent No. 792 primarily intended to improve using coiled springs?
For what seemingly domestic purpose was the first American patent for a *steel* coil spring in 1857 initially used?
Which German inventor patented the first innerspring mattress, utilizing advancements in steel coil production, in 1871?
What crucial performance metric demonstrated the wave spring's superiority over stamped wavy washers in Bayonette Connectors?
According to the progression summary, which step followed the scientific quantification of physics (Hooke's Law)?
What material were the simple bindings that predated metal chains made from?
Why is pinpointing the exact origin date or inventor of the metal chain difficult?
What was a fundamental, early purpose for which metal chains were used?
Which material did blacksmiths begin fashioning chains from, offering superior strength compared to earlier alloys?
What was a primary characteristic of early metal chains fashioned by hand?
By what time period did iron chain cables begin reliably replacing traditional rope moorings in maritime settings?
What did the focus shift towards once iron and steel became readily available manufacturing materials for chains?
What specific weakness were early wrought iron chains susceptible to, often related to how they were joined?
What monumental step characterized the development of the roller chain in power transmission?
How does a chain designed for motion (drive chain) differ fundamentally from one designed primarily for holding (anchor chain)?