초록 ▼

A power returnable tape rule has an improved connection between the outer end of the power spring and the inner end of the coilable rule blade provided by interengaging element thereon. The rule blade has an elongated aperture adjacent its inner end with the margins of the blade defining the apertur

A power returnable tape rule has an improved connection between the outer end of the power spring and the inner end of the coilable rule blade provided by interengaging element thereon. The rule blade has an elongated aperture adjacent its inner end with the margins of the blade defining the aperture including opposed inwardly extending finger portions. The tongue is configured with spaced transversely extending shoulders facing in opposite directions, and it extends along the upper surface of the rule, downwardly into the aperture under the fingers and upwardly from the aperture and forwardly thereof along the upper surface of the rule blade. The shoulders on the tongue of the spring abut the margins of the aperture adjacent the finger portions in either direction of relative longitudinal movement to limit such movement and retain the two elements in assembly.

대표청구항 ▼

In a power returnable tape rule having a case with an exit aperture in the periphery thereof, an elongated spring coiled therewithin, and an elongated rule blade coiled therewithin with its outer end extending outwardly of said exit aperture and the inner end secured to the outer end of said coiled

In a power returnable tape rule having a case with an exit aperture in the periphery thereof, an elongated spring coiled therewithin, and an elongated rule blade coiled therewithin with its outer end extending outwardly of said exit aperture and the inner end secured to the outer end of said coiled elongated spring, the improvement comprising interengaging elements on said rule and spring locking said inner end of said rule to said outer end of said spring against disassembly by relative longitudinal movement in either direction, said interengaging elements comprising an elongated aperture in said rule adjacent said inner end and a tongue on said outer end of said spring locked in said aperture against disassembly by relative longitudinal movement, the margins of said rule defining said aperture including opposed inwardly extending finger portions, said tongue extending along the upper surface of said rule, downwardly into said aperture under said fingers, upwardly from said aperture, and forwardly thereof along said upper surface of said rule, said tongue being configured with spaced transversely extending shoulders facing in opposite directions which abut the margins of said aperture adjacent said finger portions of said rule in either direction of relative longitudinal movement to limit such movement and retain said spring and rule in assembly.