Razor blade tape measure multi-tool

A, retractable tape measure, razor blade knife, 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 retraction 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 retracted,
• an, openable and retractable straight edge blade arm with integral, sliding razor blade and 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, allowing the straight edge blade arm to be used as a cutting tool.

A, retractable tape measure, spring out carpenter's square and 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 retraction 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 retracted,
• a spring powered, openable and retractable straight edge blade arm, pivotably mounted within a compartment formed into the bottom of the housing assembly, allowing the straight edge blade arm, to automatically pivot open and protrude out from the housing assembly at various angles when the blade arm actuator button is activated,
• a spring powered blocking pin assembly, released by exerting a force on an actuator button which exerts a force on the linkage and blocking pin assembly, biased to force the blocking pin into the blade arm locking notches to lock the blade into predetermined positions, one to keep the blade arm locked in the closed or fully retracted position, another to lock the straight edge blade arm at 90 degrees relative to the extended tape measure and side of the housing assembly and another to lock the blade arm in the fully open position.

A retractable tape measure, spring out carpenter's square with integral razor blade knife and 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 retraction 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 retracted,
• a spring powered, openable and retractable straight edge blade arm, with integral sliding razor blade, pivotably mounted within a compartment formed into the bottom of the housing assembly, allowing the straight edge blade arm, to automatically pivot open and protrude out from the housing assembly at varying angles when the blade arm actuator button is activated,
• a spring powered blocking pin assembly, released by exerting a force on an actuator button which exerts a force on the linkage and blocking pin assembly, biased to force the blocking pin into the blade arm locking notches to lock the blade into predetermined positions, one to keep the blade arm locked in the closed or fully retracted position, another to lock the straight edge blade arm at 90 degrees relative to the extended tape measure and side of the housing assembly and another to lock the blade arm in the fully open position,
• a razor blade slidably mounted within the straight edge arm so that the razor can be manually slid to fully sheath or partially expose the razor's cutting edge.