When breakage of the line occurs on the worksite, work must come to a halt until the line is replaced. Therefore, the line is constantly being cut due to the chafing and slicing caused through contact with other tools and foreign objects. In traditional plumb bobs, there are no means of housing and protecting the flexible line attached thereto. The flexible line then becomes a vertical extension of this datum, thereby providing surveyors, and other workers who may have an obstructed view of the actual datum, with the ability to focus in on the line and make accurate lateral alignments from the datum. The worker may, of course, adjust the positioning of the plumb bob until it becomes vertically aligned with the predetermined datum. In practice, it is typical for a worker to hold the free end of the flexible line in vertically aligned relation above a predetermined datum such that the plumb bob is suspended slightly above the datum. A plumb bob is basically comprised of an elongated, frusto-conically shaped, weighted member attached to one end of a flexible line (i.e., string). To accurately establish these point(s), a tool termed a plumb bob is commonly employed. In surveying and construction, it is quite often necessary to establish a point, or set of points, which vertically, or laterally, align with a preexisting point (datum). ![]() The present invention further relates to reels which fully retract and protect flexible plumb bob lines. ![]() The present invention broadly relates to tools used in the construction and surveying industries and, more specifically, to reels for use in combination with plumb bobs. The invention according to claim 1 wherein said means for attaching said reel to a penetrable object comprises:Ī) a hole formed longitudinally through said reel housing adjacent and parallel to said top planar member andī) an elongated staked member extending through said hole. ![]() The invention according to claim 1 wherein said knobbed member is positioned adjacent said bottom planar member and includes one edge positioned in vertically aligned relation above said aperture.ģ. An improved plumb bob reel of the type including a housing having first and second opposed, planar walls held in spaced, parallel relation to one another by longitudinally elongated bottom, top and two side planar members, said bottom and top planar members, and said two side planar members respectively extending in parallel relation to one another a spool rotatably positioned within said housing a predetermined length of flexible line for extension from and wound retraction upon said spool an aperture formed substantially centrally through said bottom planar member, said flexible line freely passing through said aperture for purposes of becoming suspended in vertical alignment above a predetermined datum and a spring retraction mechanism positioned within said housing for retracting said line upon said spool, wherein the improvements comprise:Ī) first and second longitudinally elongated magnets respectively, removably attachable to said two side planar members wherein said first and second magnets permit removable attachment of said reel to any ferrous object ī) first, second, and third elongated channels respectively formed in said first and second magnets and said top planar member, said first, second, and third channels extending in longitudinal relation with respect to said longitudinal axis of said first and second magnets and said top planar member and extending in longitudinally aligned relation to each other, whereby said flexible line may be guided through said channel and suspended in vertically aligned relation above said predetermined datum Ĭ) said spool including first and second plates held in spaced, parallel relation by a drum, said first and second plates each having respective, distinct widths, wherein said first plate's width is substantially greater than said second plates' width ĭ) said spring retraction mechanism having first and second ends and being coiled externally upon said first plate of said spool Į) a knobbed member extending outwardly from one of said first and second planar walls, whereby said flexible line may be wrapped around said knobbed member and suspended in vertically aligned relation above said predetermined datum andį) means for attaching said reel to a penetrable object.Ģ.
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