Patent ID: 6615500
Filing Date: 2003-09-09
Classification: E04F,G01C

Abstract:
A door jamb square used to align a door jamb, said door jamb square comprising:a vertically oriented spirit level having an inner web and a first end; a horizontally oriented spirit level having an inner web and a first end: means for perpendicularly attaching the first end of said vertically oriented spirit level to the first end of said horizontally oriented spirit level to form a right angle spirit level assembly; and means for securing said spirit level assembly to a door jamb to align said door jamb, wherein said securing means includes a plurality of nailing plates, each of said nailing plates defining at least one aperture for receiving a nail and having an integral hook at one end thereof, at least one said hook engaging the inner web of said vertically oriented spirit level and at least another said hook engaging the inner web of said horizontally oriented spirit level.