Geometrical instruments – Straightedge type – Cord type
Patent
1996-05-08
1998-02-24
Fulton, Christopher W.
Geometrical instruments
Straightedge type
Cord type
33392, 33332, G01C 1510, B43L 700
Patent
active
057201137
ABSTRACT:
A tool is disclosed which incorporates both a stick-pin peg and an eyelet-shaped hook, either of which may be used to anchor a chalk line. The tool can also double as a plumb bob. The tool has a peg-shaped body with a longitudinal axis. The body has a tapered lower end which terminates in a sharpened stick pin. The body has a recess for holding the eyelet-shaped hook and also incorporates a clamping mechanism which both releaseably secures the hook within the recess, and eliminates any need for tying and untying the string to the tool. The string remains secured to the eyelet-shaped hook. In order to secure the line with the eyelet-shaped hook, the hook is removed from the body by releasing the clamping mechanism. In order to secure the line with the stick-pin peg, the eyelet-shaped hook is secured within the body recess and the string is secured to the needle point by looping the string over itself twice. In order to utilize the anchor/bob as a plumb bob, the body is suspended from its longitudinal axis.
REFERENCES:
patent: 1098033 (1914-05-01), Friendship
patent: 2446253 (1948-08-01), Tresidder
patent: 2594823 (1952-04-01), Suverkrop
patent: 3113387 (1963-12-01), Bean, Jr.
patent: 5157843 (1992-10-01), Barcewski
Fox III Angus C.
Fulton Christopher W.
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