Abstract: An article of manufacture and a method or process adapted to indicate whether a product which has been kept at or below its freezing temperature has been permitted to thaw at some time subsequent to its initial freezing. The invention consists of two or more reagents being separated by an impermeable but removable or breakable barrier, said reagents being adapted to produce a chemical and/or physical change which is visually ascertainable once said barrier has either been removed or lost its integrity so that said reagents are thereafter permitted to intermix and/or interreact. Said reagents are situated within a translucent or transparent vessel in such a manner that after such reagents enter their solid states as the result of an appropriate reduction in temperature, said barrier loses its integrity as a reagent barrier only upon a subsequent and appropriate increase in the temperature about said article.

Abstract: A power transmission mechanism for transmitting rotary motion performs two separate functions: It steps down the rate of rotation of an input shaft so that a rotatable member driven through the transmission mechanism rotates at a slower rate; and it also provides resilient energy storage so that the rate of rotation of the rotatable member can vary intermittently in response to load variations that are imposed upon it.A rotatable member that is to be driven has a cylindrical track secured to it. A roller frame carries three separate rollers which engage the track at spaced locations around its circumference so that the rotatable member is rotatable relative to the roller frame. A driven shaft is directly attached to one of the rollers so as to thereby drive the rotatable member. The driven shaft is rotatably supported from an associated housing.