Mitre box

In a miter box, the combination comprising:

• A. a base member having a horizontal bed surface;
• B. a vertical post on said base member extending above said bed surface;
• C. a saw guide subassembly rotatably supported on said post, said saw guide subassembly including an index guide segment of arcuate cross section with a multiplicity of indents spaced about the periphery thereof;
• D. a wedge member pivoted adjacent its lower end on said base member below said guide segment and spaced horizontally from said post, said wedge member including an engagement edge portion spaced towards its free upper end from its pivot and towards said guide segment, said edge portion being engageable in said indents of said guide segment to prevent rotation of said saw guide subassembly about said post;
• E. means biasing said wedge member against said guide segment to engage said edge portion in one of said indents;
• and
• F. positioning means on said base member to orient said engagement edge portion of said wedge member in axial alignment with said post and thereby to ensure substantially accurate and stable rotated positioning of said saw guide subassembly about said post.