Patent ID: 11946736
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A tape measure comprising:
a housing;
a tape reel rotatably mounted within the housing;
a rotational axis defined by the tape reel around which the tape reel rotates;
an elongate tape blade wound around the tape reel;
a spiral spring located within the housing, wherein when the elongate tape blade is unwound from the tape reel to extend from the housing the spiral spring stores energy, wherein the spiral spring releasing energy drives rewinding of the elongate tape blade on to the tape reel;
a motor that interfaces with the tape reel via a clutch, the clutch positioned between the motor and the tape reel; and
a sensor that measures a tension of the spiral spring.