Random Thought - Kelk

Next door to the office where I work is a place called Kelk.
Allegedly, they build "sensors for rolling mills."
They celebrated their 50th anniversary in 2003 (the sign is still up) and their employees ("Kelkers") graciously wear their Kelk toques (even when it's not too cold) and use their Kelk umbrellas.

But I don't understand what they actually DO.
Do you?
I could probably track down their web site and read about them but it seems too easy.
Something about the sheer mystery makes it more....romantic.

d