Patent ID: 6839974
Filing Date: 2005-01-11
Classification: B25H,B43L,E04F,G01C,Y10S

Abstract:
1. A multi-function layout square of modular construction comprising: an elongate generally rectangular metallic outer casing having first and second ends, first and second sides, a top surface and a bottom surface defining a hollow interior with a longitudinal axis, an elongate longitudinal central slot in each said top and bottom surface near one end thereof parallel with the longitudinal axis of the casing, and a first and a second aperture in each said top and bottom surface spaced from said central slot disposed in longitudinally spaced apart relation; an elongate generally rectangular non-metallic inner module retained in said casing hollow interior having first and second ends, first and second sides, a top surface and a bottom surface, an elongate longitudinal sliding slot formed therethrough from said top surface to said bottom surface in alignment with said casing central slot, a horizontal level vial and a vertical level vial mounted in said inner module in alignment with said first and second apertures of said casing, respectively; a retaining member slidably disposed between said casing central slot and said module longitudinal sliding slot; a removable protractor plate slidably and rotatably disposed on said casing top surface connected with said retaining member, and having an arcuate sliding slot therethrough; first and second thumbscrews releasably connecting said protractor plate and its said arcuate slot, respectively, with said retaining member to allow linear sliding movement along said sliding slot and variable rotation of said plate about said first thumbscrew member with respect to said casing in a loosened condition and to secure said plate at selected locations and at selected rotated positions along the length of said casing in a tightened condition; and a scale on each of said casing first and second sides divided into increments with corresponding numerical indicia thereon.