Progressive Rate Springs:
What Are They Doing in My Bed?
If anyone of us knows what progressive rate springs (PRS) are, the first place we expect them is in wheeled vehicles. In fact, that is the intended application of progressive rate coiled springs, and that is what comes up first in an online search. So it surprising to find "progressive rate springs" in the description of a mattress. And a waterbed mattress, no less!
Before we go on, let's see what a progressive rate spring is. Some...
In February 2014, I posted an article about wood coils, a new kind of mattress innerspring invented and developed by a Hungarian company. Not long before the launch of wooden coils in the bedding market, another new kind of mattress spring was invented and introduced into the market by Willy Poppe, a Belgian. Poppe is CEO of a family-owned bedding manufacturer, Diamond Spring Company, in Sint-Niklaas, East Flanders, Belgium.
[caption id="attachment_807" align="aligncenter" width="950"] Stearns & Foster's Intellicoil[/caption]
[caption id="attachment_806" align="aligncenter" width="123"] Serta's Duet Coil[/caption]
Pocket coils were invented at the end of the 19th Century (1800's) by James Marshall, who began manufacturing them about 1900. Since then, individually wrapped pocket coils have been adopted by most of the major manufacturers of innerspring...