Patent ID: 7730846
Filing Date: 2010-06-08
Classification: A46B,B26B,B60C,G01D,G01L,Y10S

Abstract:
1. A strain-responsive visual indicator comprising a pair of overlapping members adapted to be mounted to a substrate such that strain in the substrate causes relative movement between those members; the proximal member comprising a set of windows alternating with separators arranged in the direction of said relative movement; the distal member comprising or being adapted to reveal indicia elements of at least three visually distinguishable types alternating in ordered sequence in the direction of said relative movement; and said windows, separators and indicia elements being configured such that in a first relative position of said members a plurality of the windows of the proximal member register with indicia elements of a first said type, in a second relative position of said members said plurality of windows register with indicia elements of a second said type, and in a third relative position of said members said plurality of windows register with indicia elements of a third said type; and wherein said windows are not substantially wider and said separators are substantially wider than each said indicia element in said direction of relative movement, and the combined width of each successive window and separator is substantially equal to the combined width of each succession of different indicia elements in said direction of relative movement.