METANORDNING AV MATTBANDSTYP, UTFORMAD FOR AUTOMATISK REGLERING AV UPPRULLNINGSHASTIGHETEN AV DENSAMMA

摘要

A tape measuring device is provided with a self-regulating recoil speed control comprising a reel rotatably journaled within a casing chamber and having a disc-like side member carrying a pair of pivot posts adjacent its peripheral rim. An annular shoulder on the casing wall extends toward the reel intermediate the rim and the pivot posts and alignably confines the reel within the chamber and limits its transverse movement, the shoulder including an arcuate brake drum surface facing generally toward the pivots. A pair of planar weighted lugs are pivotably mounted on the posts for frictionally engaging the brake drum surface and bearing thereagainst in proportion to the centrifugal force applied to the reel by a power drive recoil spring when returning a measuring blade to its recoiled position within the casing.