Retractable chalk line device

B - Operations – Transporting – 65 – H

Patent

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Details

B65H 75/48 (2006.01) B44D 3/38 (2006.01) B65H 75/44 (2006.01) F16D 65/14 (2006.01)

Patent

CA 2187506

An automatically retracting chalk line dispenser including a casing (10, 12), a spool (14) having string (62) disposed within the casing (10, 12). A centrifugal speed regulator assembly (23) having speed regulator arms (35a, 35b), each with a primary end (81) and a secondary end (83). A support mechanism (30) supports the arms (35a, 35b) and supports a spring (24) for retracting the string (62). An arbor (36) is fixedly attached to the casing (10, 12). The primary end (81) of the regulator arm (35a, 35b) is adjacent to the arbor (36). When the spool is rotating at low speeds, the primary end (81) of the regulator arm (35a, 35b) does not contact the arbor (36), and at a predetermined speed the secondary end (83) centrifugally extends and the primary end (81) contacts the arbor (36). A spool control actuator (46) is provided for controlling the spool.

Un distributeur de cordeau à craie automatiquement rétractable comprend un boîtier (10, 12), une bobine (14) pourvue d'un cordeau (62) étant montée dans le boîtier (10, 12). Il est prévu un système de régulation de vitesse centrifuge (23) qui comprend des bras de régulation de la vitesse (35a, 35b), dont chacun comporte une extrémité primaire (81) et une extrémité secondaire (83). Un mécanisme de support (30) soutient les bras (35a, 35b) et un ressort (24) servant à rentrer le cordeau (62). Une tige (36) est montée à demeure sur le boîtier (10, 12). L'extrémité primaire (81) du bras de régulation (35a, 35b) est adjacente à la tige (36). Lorsque la bobine tourne lentement, l'extrémité primaire (81) du bras de régulation (35a, 35b) ne touche pas la tige (36). A une vitesse prédéfinie, l'extrémité secondaire (83) s'étend par centrifugation et l'extrémité primaire (81) touche la tige (36). Il est prévu un actionneur (46) de commande de la bobine pour commander la bobine.

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