Patent ID: 8590170
Filing Date: 2013-11-26
Classification: B25F,B43L,G01B

Abstract:
1. A, retractable tape measure, carpenter's square, protractor combination assembly comprising: a housing assembly having two opposing side walls, a front wall, a back wall, a top wall and a bottom wall, spatially arranged to form distinct compartments, an extendable and retractable ruled tape assembly coiled into a spool, complete with refraction spring and spool brake assemblies, all contained within the housing assembly, with one end of the ruled tape protruding out of a slot in the front of said housing assembly, with a tape end tip fastened to the end of the ruled tape to prevent the tape from being fully refracted, an, openable and retractable straight edge blade arm with markings for both length and angle measurement relative to the side wall of the housing assembly, pivotably mounted within a compartment formed into the bottom of the housing assembly, allowing the straight edge blade arm to pivot open and protrude out from the housing assembly at varying angles when the blade arm is manually opened, a spring powered locking mechanism which forces the end of a cantilever locking spring against flat surfaces and/or notches in the blade arm, to lock the blade into one of several predetermined positions; one keeps the blade arm locked in the fully closed or fully retracted position, another locks the straight edge blade arm at 90 degrees relative to the side of the housing assembly to form a small carpenter's square and another locks the blade arm in the fully open position.