Special "spring device" needed
by Horst
(Chelmsford, MA)
I am in search of a "spring device" that will lay flat when more than one ounce, (28.5g) of weight is placed upon it and rise/expand as the weight is reduced to zero to a height of 2" (51mm). Its flat dimension should be similar to 41/4"x5" (108mm x 127mm), or Round 108mm.
I'm not sure that a plastic device can compress and expand to those dimensions, therefore I prefer it be made from metal.
ANY help or information you could provide me with to figure out this dilemma would be greatly appreciated.