Patent ID: 7191692

Claim:
A table saw comprising: a saw base; a primary table supported on said saw base, said primary table having a top surface and an opening through which a saw blade extends; an auxiliary table movable along a path relative to said primary table between a received position where said auxiliary table abuts against said primary table and an extended position where said auxiliary table is spaced from said primary table, said auxiliary table having a top surface; a fence movable on said top surface of said primary table and said top surface of said auxiliary table relative to said saw blade; a scale system having a first scale and a second scale, said first scale having a start point, an end point, and readings increasing in value in a direction from the start point toward the end point, said second scale having a start point, an end point, and readings increasing in value in a direction from the start point of said second scale toward the end point of said second scale, the value of the start point of said second scale being equal to that of the end point of said first scale; and an index system having a first index for indicating the readings at said first scale, and a second index for indicating the readings at said second scale; wherein said first index is provided at said fence; wherein said auxiliary table comprises a sliding track extended in parallel to said path; wherein said first scale is provided at said sliding track and said second index is provided at said sliding track; wherein said primary table comprises a guiding rail arranged in parallel to said sliding track of said auxiliary table; wherein said second scale is provided at said guiding rail; wherein the increasing direction of the readings of said second scale in value is same as the increasing direction of the readings of said first scale in value.