| 摘要 |
A device for locating an object concealed behind a piercable member which is less dense than the object comprises a handle with a thin elongated needle mounted on the handle. The location of a denser object concealed behind the piercable member, such as a stud located behind drywall, is indicated by driving the needle through the drywall at selected points until a stud is struck. The locating device preferably includes a collar member surrounding and embracing the piercing end of the needle which provides lateral support for this part of the needle. The collar telescopes within a bore provided on the handle during penetration of the piercable member, with the collar being biased outboard relative to the bore to assure such lateral support at the point of needle penetration. A rigid sleeve surrounds a shank portion of the needle, with the collar member sliding along the outside of the sleeve during penetration. The sleeve lends further lateral support to the needle. The lateral support so provided enables the use of a very thin needle which readily penetrates the drywall and leaves only a tiny pin hole to repair, if necessary.
|
