Abstract: A retractable tape measure having a flexible tape biased in a coiled position, and a housing sized to contain the flexible tape. The housing includes an opening through which a first end of the flexible tape extends, and a slot for positioning a locking mechanism. A tape biasing member operatively connects to the flexible tape to bias it in a retracted position. The locking mechanism controls the extension and retraction of the flexible tape from the housing. The mechanism includes a locking lever having a grip arm extending through the slot and a lock arm for contacting the flexible tape. A pin extends through the locking lever making the locking lever pivotable between an open position in which the flexible tape can move freely through the opening, a maintain position in which the flexible tape only exits freely through the opening, and a locked position to prevent the tape from moving relative to the opening. A lock biasing member biases the locking lever towards the locked position.

Abstract: A one-piece compound lock for a power return measuring tape includes an elongated lock member slidably mounted in a casing that engages both the tape blade and the tape drum to resist unwanted movement of the blade. The lock member has a resilient locking tongue and is slidably engaged in grooves in the casing to guide movement of the tongue between an unlocked and a locked position. Drum locking tabs extend laterally from lock member. In the locked position, the locking tongue applies locking pressure to the tape blade and the drum locking tabs engage the tape drum to resist rotation.