In addition to the spiral, the elliptic and the volute steel springs, we have in the invention here illustrated an entirely novel form, which may be called the flat coil, and which is said to be ...

Hence the rise of the modern iteration of the box spring: the mattress foundation. Generally made with wood or metal, these foundations are framelike with support slats across the top where the ...

A stainless steel spring is skillfully formed on a manual lathe machine, ensuring precision in every turn. The machining process refines the metal, creating a durable and flexible structure for ...